XML Implementable Technology Specification for V3 Structures |
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Last Published: 10/03/2005 12:07 PM HL7® Version 3 Standard, © 2005 Health Level Seven®, Inc. All Rights Reserved. HL7 and Health Level Seven are registered trademarks of Health Level Seven, Inc. Reg. U.S. Pat & TM Off |
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Table of Contentsiii Assumptions
1 Overview
2.1 Overview
2.4.1 Cardinality
2.4.4 Interactions
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Preface |
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i |
Acknowledgements |
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This standard is the result of over five years of intense work through e-mail, telephone conferences and meeting discussions. Wes Rishel (Gartner Group) was the principle author of previous drafts of DTDs for HMD-level elements and Version 3 Datatypes, Paul V. Biron (Kaiser Permanente), Skirmantas Kligys (Oracle), Joey Coyle (Intermountain Healthcare), Dale Nelson (Zed-Logic Informatics, LLC), Charlie McCay (Ramsey Systems Ltd) and Matthew Stephens (Ramsey Systems Ltd) continued this work, taking into account the use of W3c schema for XML processing. Important ideas have been contributed by Gunther Schadow, Bob Dolin (Kaiser Permanente), Vassil Peytchev (Epic), Mark Tucker (Regenstrief Institute), and George W. Beeler (Beeler consulting). Kai U. Heitmann (HL7 Germany) is the principle author of this document, and it was subsequently edited by Dale Nelson and Charlie McCay. Matthew Stephens is the current editor of this document. |
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ii |
Prerequisites |
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It is a prerequisite that readers have a general knowledge of XML technology. Readers unfamiliar with XML may gain the requisite knowledge from the following standards: | ||||||||||||||||||||||||||||||||||
iii |
Assumptions |
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It is assumed that the reader is familiar with HL7 version 3 terminology - especially those related to message definition (HL7 information model terminology, Message Instances, Message Types, Interactions, CMETs, wrappers, etc.). For more information on these, refer to the V3 Guide |
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iv |
Document Objective |
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The objective of this document is to present an Implementable Technology Specification (ITS) for the encoding rules for HL7 Version 3 messages based on the Extensible Markup Language XML. |
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Several XML encoding methods could serve as a messaging syntax for HL7 V3 messages. This document represents the method that is recommended by HL7, describing the underlying rules and principles. The corresponding data type descriptions necessary for this specification are described in the Data Types XML ITS. |
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1 |
Overview |
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1.1 |
Introduction and Scope |
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This document describes how HL7 V3 compliant messages can be expressed using XML. It describes how the definition of the set of valid XML instance documents is derived from a specific HL7 Message Type. It covers ISO levels 5 and 6. Those familiar with V2 might call these the "XML encoding rules" for HL7 Version 3 messages. |
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2 |
Mapping to the XML Instance |
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This section describes how an HL7 V3 Message Type can be represented in an XML instance document. The representation is determined algorithmically from the HL7 Message Type definition. |
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2.1 |
Overview |
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For the purposes of this document, we will be referring to HL7 V3 Message Types since they represent a fully specified, constrained, implementable definition of an HL7 V3 message in a serial tabular format. However, one should recall that HL7 Message Types are derived from higher level message definitions such as HMDs and information models (RMIMs, etc). All information contained in HL7 message types is ultimately derived from the V3 RIM. Therefore, although the Message Type is useful for defining how to create an XML instance for a message or document in an algorithmic way, the semantics may be better understood by also looking at higher level representations. For more information on HL7 V3 Message Types, HMDs, and RMIMs, please refer to the V3 Guide. | ||||||||||||||||||||||||||||||||||
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2.2 |
XML structures derived from an HMD |
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The XML elements and attributes in a message instance correspond one-to-one with individual rows in the HMD with the root element representation for a transmission wrapper being the only exception. This is explained in more detail below. |
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Structural attributes like classCode, moodCode etc., are represented as XML attributes in the instance. Where these have fixed values defined in the HMD, they may be omitted from the instance. Where there is a default value, and the default is appropriate for the instance, the XML attribute may be omitted. Where an XML attribute has been omitted the receiving system should assume the fixed or default value as specified in the HMD. |
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2.3 |
Use of XML Namespaces |
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All XML elements and attributes (except for informal extensions and the contents of ED datatypes) are to be represented
in the namespace defined by |
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Attributes "type" and "nil" from the xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" namespace may be used. The "type" attribute will be used to indicate the datatype of elements where this could be ambiguous. |
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In this document all examples will be written with the assumption that |
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The use of namespaces within the ED datatype are discussed in the XML ITS Data Types. |
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XML content from other namespaces (except within an ED datatype) will be assumed to be informal extensions as described later in this document and be ignored by receiving systems that do not recognize them. |
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2.4 |
Determination of the XML representation |
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2.4.1 |
Cardinality |
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For each row in the HMD representing a class, attribute, or association the cardinality in the HMD sets the upper and lower limits on the number of elements that may be included in the instance which correspond to that row. Note that it is never possible to repeat structural attributes, and these are optional in the XML instances if a default or fixed value has been set. |
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2.4.2 |
Message Elements That Are HL7 Classes |
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The name for the element representing the Class is taken either from the association name, or in the case of the root element representation for a transmission wrapper, from the InteractionID. |
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Where the Class is flagged as Mandatory it must be included in the message for the message to be valid. |
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The XML representation of these elements are determined by the SRC column, whose value will be one of: "N", "R", "U", "I", or "C". |
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<IP_ADDRESS> |
Associations with direct content |
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If the value of the SRC column is "N" or "R" then the XML representation will be a sequence of child elements, one for each HMD row of type "Attr" followed by one for each HMD row of type "Assoc" whose InMET column equals the Row column of the row in question. |
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Example: |
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<hl7:author typeCode="AUT" xmlns:hl7="urn:hl7-org:v3"> <hl7:assignedEntity classCode="ASSIGNED"> <hl7:id root="2.16.840.1.1138<IP_ADDRESS>.2" extension="G0000017"/> <hl7:code code="008"/> </hl7:assignedEntity> </hl7:author> |
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<IP_ADDRESS> |
Choices |
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The preceding is true unless the value of OfMET contains a choice of more than one message element type. In this case, the XML representation represents the choice as a choice of one or more XML elements corresponding to those identified in the ofMET row. Each element will have content derived as described in this section from the row in the HMD with that Element Name. |
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If the value of the SRC column is “I” or “U” then the XML representation is the same as defined for the row in the HMD being referenced. In the case of “I” the content in the row must also be identical. |
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Example: |
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<hl7:accountHolder xmlns:hl7="urn:hl7-org:v3"> <hl7:id root="AAAABBBB-1452-6352-7363-DEA51FEA5241"/> <hl7:heldAccountHolderPerson classCode="PSN" determinerCode="INSTANCE"> <hl7:name> <hl7:given>Adam</hl7:given> <hl7:family>Everyman</hl7:family> </hl7:name> <hl7:addr> <hl7:streetAddressLine> 2222 Home Street </hl7:streetAddressLine> <hl7:city>Ann Arbor</hl7:city> <hl7:state>MI</hl7:state> <hl7:postalCode>99999</hl7:postalCode> <hl7:country>USA</hl7:country> </hl7:addr> </hl7:heldAccountHolderPerson> </hl7:accountHolder> |
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<IP_ADDRESS> |
CMETs |
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If the value of the SRC column is "C" (i.e., the HMD row is defined by a CMET) then the XML representation of the element is determined by applying the rules in “Message Elements That Are RIM Classes” to the requisite CMET found in the OfMET column. |
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If the value of the SRC column is “I” or “U” then the XML representation is the same as defined for the row in the HMD being referenced. In the case of “I” the content in the row must also be identical. |
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Example: |
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<hl7:contact xmlns:hl7="urn:hl7-org:v3"> <hl7:id root="AAAA1234-ADE1-543A-CFD4-DACE42D93FAC"/> <hl7:statusCode code="active"/> <hl7:telecom value="tel:+441234123456"/> <hl7:effectiveTime value="20040314"/> <hl7:contactPerson> .... </hl7:contactPerson> </hl7:contact> |
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2.4.3 |
Message Elements That Are HL7 Attributes |
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HL7 structural attributes are conveyed as attributes. Where there is a default or fixed value defined in the HL7 static model then the attribute may be omitted from the XML representation, and the receiving system will behave as though the fixed or default value was sent. Note that according to the Refinements and Localization document "the default is a single value, once a default has been set, it may not be further constrained. Moreover, the assertion of default values may only be done by an HL7 Technical Committee as it prepares a ballot, or by an HL7 International Affiliate that is preparing a region-specific profile". |
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Non-structural attributes are represented as elements with the name taken from the “Element Name” in the HMD. The XML representation of these elements are determined by the OfMET. Specifically, for rows of type "Attr", the value of OfMET will be the name of a Version 3 Data Type, and hence, the XML representation will be as described in the XML ITS Data Types. |
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Example: |
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<hl7:author typeCode="AUT" xmlns:hl7="urn:hl7-org:v3"> <hl7:assignedEntity classCode="ASSIGNED"> <hl7:id root="2.16.840.1.1138<IP_ADDRESS>.2" extension="G0000017"/> <hl7:code code="008"/> </hl7:assignedEntity> </hl7:author> |
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2.4.4 |
Interactions |
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Interactions are defined for HL7v3 messages, but are not relevant for CDA documents. See the V3 Guide for further details on how and why interactions are defined and used. |
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Interactions are represented by an XML element named using the artifact code for the interaction. The content model of this element is determined by the Message Type for the transmission wrapper. |
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Where the transmission wrapper contains a Control Act class, this class is replaced by the Control Act Message Type as specified for the interaction. If the Control Act Message Type contains an entry point stub, then this is replaced by the Message Type for the payload as defined in the interaction. |
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The Interaction element must have an attribute “ITSversion” that provides a version identifier for the XML ITS (Datatypes and Structures) that is to be used. |
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2.5 |
Informal Extensions |
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In order to support informal extensions as described in the HL7 V3 Conformance and extensibility specification, it is permitted to include additional XML elements and attributes that are not included in the HL7 definition of a message type. These extensions should not change the meaning of any of the standard data items, and receiving applications must be able to safely ignore these elements. |
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When included in an instance local extensions MUST be in a namespace other than the HL7v3 namespace. Such extensions must not be included within an ED datatype, since it would not always be possible to distinguish between foreign namespace items that form part of the content of the standard ED datatype, and content that was intended to be an informal extension. Since all conformant content (outside of elements of type ED) is in the HL7 namespace, the sender can put any extension content into a foreign namespace (any namespace other than the HL7 namespace), and the receiver will be able to recognise that such content may be safely ignored. However, attributes in the xsi namespace should not be considered as foreign for the purposes of deciding whether content is an informal extension. Receiving systems must not report an error if such extensions are present. |
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Example: |
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<hl7:inFulfillmentOf xmlns:hl7="urn:hl7-org:v3"> <hl7:priorActRequest> <ex:MessageRequests xmlns:ex="http://www.example.com/messaging"> <ex:RequestedMessage> 001-345-234 </ex:RequestedMessage> </ex:MessageRequests> </hl7:priorActRequest> </hl7:inFulfillmentOf> |
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2.6 |
Backwards and Forwards compatibility |
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When there are different versions of either the abstract HL7 artifact definitions, or of the ITS, it is anticipated that these versions will be no more than a single XSLT transform apart. |
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While setting the rules for version compatibility between different versions of the same HL7v3 artifact is beyond the scope of this specification, it is anticipated that it will be possible to generate XSLT transformations to convert between versions. There may be changes in valuesets for domains that need to be addressed in some other way, but again this is beyond the scope of an ITS specification. |
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It is a constraint on the definition of future versions of the XML ITS that it must be possible to write an XSLT transformation to map between instances of the same artifact created under the different versions of the ITS. |
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2.7 |
The Use of Schema Processors |
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Schema processing is not a conformance requirement although this specification has been designed to make schema processing beneficial. Where schemas are used receivers may use alternate schemas (including DTDs) than the ones provided by HL7. |
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Sending applications should not provide schema location hints for the HL7 namespace and receiving applications that perform schema processing should ignore such hints if provided and instead should use whatever other means they have at their disposal to locate the relevant official HL7 schemas or their own customizations thereof. It is in the interest of the receivers own security and safety not to use sender supplied schemaLocation hints. |
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3 |
References |
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[rfDatatypes1] |
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[rfDatatypes2] |
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[rfXMLschema] |
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[rfXML] |
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[rfXMLnamespace] |
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[rfXPath] |
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[rfXSLT] |
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[rfV3guide] |
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{rfV3Glossary} |
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4 |
Appendix A |
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4.1 |
Example Instance for an Interaction |
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The following is an example instance for the interaction PRPA_IN040301 taken from the emergency encounter topic in the patient administration domain. <?xml version="1.0" encoding="utf-8"?> <!--Example copyright 2004 by Health Level Seven, Inc. --> <!-- Example message for PRPA_IN403001 - Emergency Encounter Started interaction --> <hl7:PRPA_IN403001 xmlns:hl7="urn:hl7-org:v3"> <hl7:id root="2.16.840.1.113883.1.6" extension="1-976-245" displayable="true"/> <hl7:creationTime value="20040927100100"/> <hl7:versionCode code="V3PR1"/> <hl7:interactionId root=" 2.16.840.1.1138<IP_ADDRESS>.2.4.12" extension=" PRPA_IN403001" displayable="true"/> <hl7:processingCode code="P"/> <hl7:processingModeCode code="T"/> <hl7:acceptAckCode code="AL"/> <hl7:receiver> <hl7:device> <hl7:id root="2.16.840.1.1138<IP_ADDRESS>8" extension="123" displayable="true"/> <hl7:name use="L"> <hl7:given>Good Health Lab System</hl7:given> </hl7:name> </hl7:device> </hl7:receiver> <hl7:sender> <hl7:device> <hl7:id root="2.16.840.1.1138<IP_ADDRESS>9" extension="456" displayable="true"/> <hl7:name use="L"> <hl7:given> Good Health Patient Admin System </hl7:given> </hl7:name> </hl7:device> </hl7:sender> <!--  These items were stored for safekeeping during his stay. </hl7:value> </hl7:valuablesLocation> </hl7:pertinentInformation1> <hl7:pertinentInformation2> <hl7:priorityNumber value="1"/> <hl7:observationDx negationInd="false"> <hl7:code code="ADMDX" codeSystem="2.16.840.1.113883.5.4" codeSystemName="ActCode" displayName="admitting_diagnosis"/> <hl7:statusCode code="active"/> <hl7:value code="518.82" codeSystem="2.16.840.1.113883.5" codeSystemName="ICD9" codeSystemVersion="9" displayName="Acute Respiratory Distress"/> </hl7:observationDx> </hl7:pertinentInformation2> <hl7:arrivedBy contextControlCode="OP" contextConductionInd="true" typeCode="ARR"> <hl7:transportationEvent moodCode="EVN"> <hl7:text mediaType="text/plain"> Ambulance </hl7:text> </hl7:transportationEvent> </hl7:arrivedBy> </hl7:encounterEvent> </hl7:subject> </hl7:controlActProcess> </hl7:PRPA_IN403001> |
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5 |
Appendix B |
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5.1 |
RIM structural attributes |
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The RIM structural attributes are enumerated below. | ||||||||||||||||||||||||||||||||||
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--- creation_epoch:<PHONE_NUMBER> lastmod_epoch:<PHONE_NUMBER> categories: ['Computer Problems'] title: HTC Hero, Sorry, you cannot attach this to your message --- Sorry, you cannot attach this to your message
That was the message I got on my phone when trying to send a photo via MMS (text). The problem was the image was 5 megapixels which is too large for any MMS message. I did some research and found that you could either retake the picture at a lower quality setting or use a handy app instead.
Solution:
Search the Google Android Market for "handcent." It is a full replacement for the message app that comes with your phone (you can still use both if you want). It works way better for regular text messages and it auto-resizes pictures you want to send. It is also free.


--- title: Translation Managers category: Hidden order: 5 ---
Our community is constantly translating DuckDuckGo into their languages. For every language, there's a large set of submitted translations, some good and some bad. To make sure that only the good ones are used on DuckDuckGo, we enlist the help of our community!
Translation Managers oversee the submitted translations in their languages. They're like moderators but for translated words, instead of forum comments.
If you'd like to become a Translation Manager, check out our page here.


\begin{figure}[placement] body of the figure \caption{figure title} \end{figure}
Figures are objects that are not part of the normal text, and are usually "floated" to a convenient place, like the top of a page. Figures will not be split between two pages.
The optional argument [placement] determines where LaTeX will try to place your figure. There are four places where LaTeX can possibly put a float:
The standard report and article styles use the default placement tbp.
The body of the figure is made up of whatever text, LaTeX commands, etc., you wish. The \caption command allows you to title your figure.
See also Environments,
Picture
Back to the Table of Contents


| 059:002 Khan | : |
He it is Who drove out the disbelievers among the people of the Scripture (i.e. the Jews of the tribe of Bani An-Nadir) from their homes at the first gathering. You did not think that they would get out. And they thought that their fortresses would defend them from Allah! But Allah's (Torment) reached them from a place whereof they expected it not, and He cast terror into their hearts, so that they destroyed their own dwellings with their own hands and the hands of the believers. Then take admonition, O you with eyes (to see). |
| 059:002 Maulana | : |
He it is Who caused those who disbelieved of the People of the Book to go forth from their homes at the first banishment. You deemed not that they would go forth, while they thought that their fortresses would defend them against Allah. But Allah came to them from place they expected not and cast terror into their hearts -- they demolished their houses with their own hands and the hands of the believers. So take a lesson, O you who have eyes! |
| 059:002 Pickthal | : |
He it is Who hath caused those of the People of the Scripture who disbelieved to go forth from their homes unto the first exile. Ye deemed not that they would go forth, while they deemed that their strongholds would protect them from Allah. But Allah reached them from a place whereof they recked not, and cast terror in their hearts so that they ruined their houses with their own hands and the hands of the believers. So learn a lesson, O ye who have eyes! |
| 059:002 Rashad | : |
He is the One who evicted those who disbelieved among the people of the scripture from their homes in a mass exodus. You never thought that they would leave, and they thought that their preparations would protect them from GOD. But then GOD came to them whence they never expected, and threw terror into their hearts. Thus, they abandoned their homes on their own volition, in addition to pressure from the believers. You should learn from this, O you who possess vision. |
| 059:002 Sarwar | : |
It is He who drove the disbelievers among the followers of the Bible out of their homes (in the Arabian Peninsula) as the first time exiles. You did not think that they would leave their homes and they thought that their fortresses would save them from God. The decree of God came upon them in a way that even they did not expect. He caused such terror to enter their hearts that they started to destroy their own homes by their own hands and by those of the believers. People of vision, learn from this a lesson. |
| 059:002 Shakir | : |
He it is Who caused those who disbelieved of the followers of the Book to go forth from their homes at the first banishment you did not think that they would go forth, while they were certain that their fortresses would defend them against Allah; but Allah came to them whence they did not expect, and cast terror into their hearts; they demolished their houses with their own hands and the hands of the believers; therefore take a lesson, O you who have eyes! |
| 059:002 Sherali | : |
HE it is Who caused the disbelievers of the People of the Book to go forth from their homes at the time of the first banishment. You did not think that they would go forth and they thought that their fortresses would defend them against ALLAH. But ALLAH came upon them whence they did not expect, and cast terror into their hearts, so that they demolished their houses with their own hands and with the hands of the believers. So take a lesson, O ye who have eyes. |
| 059:002 Yusufali | : |
It is He Who got out the Unbelievers among the People of the Book from their homes at the first gathering (of the forces).  But the (Wrath of) Allah came to them from quarters from which they little expected (it), and cast terror into their hearts, so that they destroyed their dwellings by their own hands and the hands of the Believers, take warning, then, O ye with eyes (to see)! |
Concepts/Themes Covered: أركان الإسلام > التوحيد > الكافرون > وعيدهم Pillars of Islam> Islamic> The Disbelievers> Being Threatened الجهاد > الجهاد في سبيل الإسلام > الدعوة إلى الجهاد Jihad> The Call to Jihad>The Call for the Holy War الجهاد > الغزوات > غزوة بني النضير Jihad> The Holy Battles> Bani Al-Nudair Battle العمل > العمل الطالح > مشاقة الله Action(Work)> Bad Deeds>Defy and Disobeying Allah الديانات > أهل الكتاب: ( اليهود و النصارى) > العلاقة معهم Religions> The People of the Book (the Jews and the Christians)>The Relation with them
This tool uses eight English parallel translations for the Holy Quran imported from Mr. Clay Smith. You can also visit Qurany Concepts for browsing the Quran themes or topics. If you want to search the Holy Quran for keywords, please visit Qurany Keywords.


{{ define "main" }} User Interface Design Gallery A gallery of user interfaces that I've collected over the years. {{ range .Paginator.Pages }} {{ .Render "list-node"}} {{ end }} {{/* /column */}} {{/* /columns */}} {{/* /container */}} {{ template "_internal/pagination.html" . }} {{ end }}
A gallery of user interfaces that I've collected over the years.


// Single line comment
/* Mutli-line
comment */
'a'
"foo bar baz"
"""Multi-line
string"""
0
21
0xFFFFFFFF
-42L
0.0
1e30f
3.14159f
1.0e-100
.1
'x
'identifier
// Contributed by John Williams
package examples
object lazyLib {
/** Delay the evaluation of an expression until it is needed. */
def delay[A](value: => A): Susp[A] = new SuspImpl[A](value)
/** Get the value of a delayed expression. */
implicit def force[A](s: Susp[A]): A = s()
/**
* Data type of suspended computations. (The name froms from ML.)
*/
abstract class Susp[+A] extends Function0[A]
/**
* Implementation of suspended computations, separated from the
* abstract class so that the type parameter can be invariant.
*/
class SuspImpl[A](lazyValue: => A) extends Susp[A] {
private var maybeValue: Option[A] = None
override def apply() = maybeValue match {
case None =>
val value = lazyValue
maybeValue = Some(value)
value
case Some(value) =>
value
}
override def toString() = maybeValue match {
case None => "Susp(?)"
case Some(value) => "Susp(" + value + ")"
}
}
}
object lazyEvaluation {
import lazyLib._
def main(args: Array[String]) = {
val s: Susp[Int] = delay { println("evaluating..."); 3 }
println("s = " + s) // show that s is unevaluated
println("s() = " + s()) // evaluate s
println("s = " + s) // show that the value is saved
println("2 + s = " + (2 + s)) // implicit call to force()
val sl = delay { Some(3) }
val sl1: Susp[Some[Int]] = sl
val sl2: Susp[Option[Int]] = sl1 // the type is covariant
println("sl2 = " + sl2)
println("sl2() = " + sl2())
println("sl2 = " + sl2)
}
}
There are certain edge cases where Prism will fail. There are always such cases in every regex-based syntax highlighter. However, Prism dares to be open and honest about them. If a failure is listed here, it doesn’t mean it will never be fixed. This is more of a “known bugs” list, just with a certain type of bug.
/* Nested block
/* comments
are */
not supported */


Submitted by TrystanLea on Sun, 01/01/2012 - 12:13
I had an issue this morning while trying to use the getDHCPandDNS example. It seemed to get the server ip the first time I would try to reach a particular domain, but after resetting and attempting to reach the same domain again it would fail.
I noticed that when it prints out the ip addresses after the dhcpSetup it would give me the following:
[getDHCPandDNS]
My IP: <IP_ADDRESS>
GW IP: <IP_ADDRESS>
DNS IP: <IP_ADDRESS>
I thought that as it was printing out my router ip address for the dns ip address there may be some mixup going on somehow, could it be due to my router hardware maybe?
If I set the DNS address manually after dhcp setup with:
EtherCard DNS issue and potential fix?
Submitted by TrystanLea on Sun, 01/01/2012 - 12:13I had an issue this morning while trying to use the getDHCPandDNS example. It seemed to get the server ip the first time I would try to reach a particular domain, but after resetting and attempting to reach the same domain again it would fail.
I noticed that when it prints out the ip addresses after the dhcpSetup it would give me the following:
[getDHCPandDNS]
My IP: <IP_ADDRESS>
GW IP: <IP_ADDRESS>
DNS IP: <IP_ADDRESS>
I thought that as it was printing out my router ip address for the dns ip address there may be some mixup going on somehow, could it be due to my router hardware maybe?
If I set the DNS address manually after dhcp setup with:
static byte dnsip[] = {8,8,8,8};
ether.copyIp(ether.dnsip, dnsip);
ether.printIp("DNS IP: ", ether.dnsip);
dnsLookup then works reliably getting the server ip every time.
Just thought I would post this up in case its of any use, does anyone else have this issue?
I posted this up on the jeelabs forum here too


This example demonstrates JSON autocompletion by schema. try to change the JSON properties and values and you'll get a suggestions that are based on the schema properties, examples and enums.
See http://json-schema.org/ for more information.


--- title: get_flag sidebar: function_reference_sidebar permalink: get_flag.html folder: function_reference toc: false ---
extract flag from option list
In case the option occurs more than one time in the option list the first value that meets the type condition is returned.
| option_list | Cell Array |
| flag_list | Cell Array |
| default_flag | default value |
| flag | string |


{% extends "base.html" %} {% block body %}
Is a pretty cool guy and doesn't afraid of anything
github
Is literally perfect in every way.
Likes long walks on the beach.
Ostensibly likes kittens.
yes.


Generally, installing XGBoost on Mac is not a cumbersome task, but I still suffered some errors while dealing with it. So I make a note here to record the overall process to make it works.
XGBoost is an optimized distributed gradient boosting library designed to be highly efficient, flexible and portable. It implements machine learning algorithms under the Gradient Boosting framework. Um… those words are directly copy from XGBoost GitHub page. Here is not a introduction of XGBoost, but a tutorial for how to install it on Mac.
Prerequisite
First of all, the Homebrew is required, if you do not install it yet, you can get it from here: [link]. Installing it is straightforward, just copy the link provided in Homebrew home page and execute it.
Then you need install gcc
with OpenMP:
$ brew install gcc --without-multilib
It will download and build gcc
automatically. This process takes a while, around 20 minutes or more. After gcc
is built successfully, we can start to install XGBoost.
Install XGBoost
First, get the XGBoost:
$ cd <Directory> # a directory where you want to store it
$ git clone --recursive https://github.com/dmlc/xgboost
After cloning XGBoost to you local directory, we need to build it. Here I name the <Directory>
as xgboost
$ cd xgboost
$ vi make/config.mk
Then uncomment the following two lines:
export CC = gcc
export CXX = g++
This is not enough, if you just uncomment it and try to build the XGBoost, it will return the following error to you (system tried to build XGBoost with clang
):
...
clang: error: unsupported option '-fopenmp'
...
Since it will use the self-contained modules of system to make and compile it, the system has the clang
version accord to ~3.7
, and openMP was default supported since 3.8
. Here we need to use the installed gcc
just now to build it. Here we should check which version of gcc
we have installed first:
$ cd /usr/local/bin
Check which version of gcc
was installed, mine is gcc-7
and g++-7
. So I change the two umcomment lines to:
export CC = gcc-7
export CXX = g++-7
Then build XGBoost with following commands:
$ cd ..
$ cp make/config.mk .
$ sudo make -j4 # sudo is important, prevent permission denied issue
Python-Package Configuration
Once XGBoost is built, we can use it with its command line. Since I am using Python, so I also do the following step to set it to my python environment:
$ cd python-package
$ sudo python3 setup.py install
Then you will get the information:
...
Installed /usr/local/lib/python3.6/site-packages/xgboost-0.6-py3.6.egg
Processing dependencies for xgboost==0.6
Searching for scipy==0.19.1
Best match: scipy 0.19.1
Adding scipy 0.19.1 to easy-install.pth file
Using /usr/local/lib/python3.6/site-packages
Searching for numpy==1.13.0
Best match: numpy 1.13.0
Adding numpy 1.13.0 to easy-install.pth file
Using /usr/local/lib/python3.6/site-packages
Finished processing dependencies for xgboost==0.6
which means you have installed XGBoost successfully, then you can restart Python (or the IDE you used), and you will be able to import xgboost
.
JVM-Package Configuration
Currently, XGBoost4J only support installation from source. Building XGBoost4J using Maven requires Maven 3 or newer, Java 7+ and CMake 3.2+ for compiling the JNI bindings. Before you install XGBoost4J, you need to define environment variable JAVA_HOME
as your JDK directory to ensure that your compiler can find jni.h
correctly, since XGBoost4J relies on JNI to implement the interaction between the JVM and native libraries.
After your JAVA_HOME
is defined correctly, it is as simple as run mvn package
under jvm-packages directory to install XGBoost4J. You can also skip the tests by running mvn -DskipTests=true package
, if you are sure about the correctness of your local setup.
Go to jvm-packages
, then use mvn
command to compile it.
$ cd jvm-packages
$ sudo mvn package # sudo is important, prevent permission denied issue
If the setting is correct, we will get the following information (It will take some time to compile, be patient):
...
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ xgboost4j-example ---
[INFO] Building jar: /usr/local/xgboost/jvm-packages/xgboost4j-example/target/xgboost4j-example-0.7.jar
[INFO]
[INFO] --- maven-assembly-plugin:2.6:single (make-assembly) @ xgboost4j-example ---
[INFO] Building jar: /usr/local/xgboost/jvm-packages/xgboost4j-example/target/xgboost4j-example-0.7-jar-with-dependencies.jar
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] xgboost-jvm ........................................ SUCCESS [ 5.185 s]
[INFO] xgboost4j .......................................... SUCCESS [02:26 min]
[INFO] xgboost4j-spark .................................... SUCCESS [02:55 min]
[INFO] xgboost4j-flink .................................... SUCCESS [ 59.954 s]
[INFO] xgboost4j-example .................................. SUCCESS [ 19.563 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 06:46 min
[INFO] Finished at: 2017-07-27T19:04:16+08:00
[INFO] Final Memory: 434M/1551M
[INFO] ------------------------------------------------------------------------
IsaacChanghaus-MacBook-Pro:jvm-packages zhanghao$


My name is Hamza Iqbal. In December of 2020, I graduated from Texas A&M University with a Bachelor's degree in Industrial Engineering (Minor: Engineering Project Management). I also obtained a Data Center Operations Engineering Certificate and an Engineering Systems Management Certificate.
The purpose of this website is to supplement my resume and showcase my work, skills, and accomplishments. This is the home page which can be accessed from other pages by clicking on the home icon located at the left edge of the navigation bar at the top of the webpage. A copy of my resume is dispayed in the section below and is followed by another section with 3D models in an interactive model viewer for fun. The navigation bar contains a link to my projects page which has information about my various projects paired with any relevant visuals.


At Least 10 Killed by Explosion in Syria's Tel Abyad - Report
The explosion reportedly occurred in a market, claiming the lives of civilians.
At least 10 people were killed by an explosion in the Syrian town of Tel Abyad, Turkish Anadolu agency reports.
It added that the incident took place in a market, resulting in civilian deaths.
According to Hürriyet, the injured were taken to a hospital in Akçakale. The Turkish armed forces have strengthened security on the border with Syria following the explosion.
Meanwhile, the Syrian Observatory says that there was a car explosion in Tel Abyad, in which 10 people were killed and about 20 injured.
DETAILS TO FOLLOW


CAMT SE
Home
(current)
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Activities Calendar for Students
Admissions
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KIC
Contract us


Got my target and I couldn’t be happier.... I hope it’s not one of those target-is-your sender things, because I already owe my target one. This gif is unrelated, but I found it earlier but didn’t wind up using it. Just felt nervous posting without a gif. https://www.carmillaonline.com/wp-content/uploads/2014/04/tio-salamanca3.gif
Target, standard hints, let's get them out of the way... We have BIFed together before. Shipping north and west (or west and north). GIF result for "standard" https://thumbs.gfycat.com/HelpfulSnarlingAlbacoretuna-max-1mb.gif
I just friended everyone on Untappd, and between now and the shipping deadline, each day I will unfriend one or more of you (“you’re fired!”) until only my target is left friended.... Nope, much too lazy for that. I friended no one. https://thumbs.gfycat.com/RequiredSaneDassie-max-1mb.gif
Sender - sorry if I've been "absent" - I've been liking everything, if not posting much. I've been BIZE meeting jmgrub and other folks in person, and settling up on the Math trade, etc. But I should be focused here after today/tomorrow. https://media.giphy.com/media/LkPZEW9Y56fAI/giphy.gif Target, ummmmm, I haven't seen you in this thread yet, but no worries, I know you are BIZE, and I'm fine with it.
target, been a minute (as the kids say) since you’ve been on TB, let alone IN this thread...I know you are BIZE, but I hope you’re OK, in general... https://i.makeagif.com/media/5-11-2015/rygty5.gif Sender: noidea.gif
If you had your target’s cell phone and (s)he hadn’t logged onto TB in nearly 2 weeks, would you text her/him, just to make sure they’re OK? https://media.giphy.com/media/JSGPLVBqN9Bh6/giphy.gif
I wonder if my target quit TB 2 weeks ago (that's around the time that was all happening, right)? https://media.giphy.com/media/onozNDEOoj3nW/giphy.gif Her/his untappd is active, thankfully, so (s)he appears to be OK at least.
2 weeks since my target logged on... SecretCostanza do you want to use your powers to see if (s)he quit TB or this BIF? Happy to send a box, because I sort of owe her/him one anyway, but I’d be worried about their target... Unsure how to handle... https://media1.tenor.com/images/a5d28e509cbbb67df5740431c89abb56/tenor.gif?itemid=10566496
While it seems my target *may* have figured me out, sender... https://media.giphy.com/media/bPTXcJiIzzWz6/giphy.gif
Now that my target knows who I am... https://media.giphy.com/media/ftXmTBgSnsJ8c/giphy.gif Wrap and ship seems to be the answer, I guess....though half tempted to wait until after the Ryeway, Gravedigger Billy, and Vanilla Deth release next weekend...target, what say you?
Target, I hope to get wrapping soon...assume it will go something like this... https://media.giphy.com/media/xTka03MBiynp0rvSrC/giphy.gif This is probably more likely, though https://cdn2-www.mandatory.com/assets/uploads/gallery/terrible-wrapping/terrible-gift-wrapping-fails-1.jpg Sender: https://media.giphy.com/media/26FKX7B7L6cfHPVIY/giphy-downsized-large.gif
Anyone who was hoping for VD, er...Vanilla Deth from me, bad news....sold out last night(and I wasn’t there). Target, thinking about replacing with another popular but widely distributed BA Vanilla stout. You don’t seem like the type to be anywhere near a line/store on Black Friday, but like this post to confirm. If you don’t like this before tomorrow night, I might roll with it (if you’re offline) or replace with a different local.
Target, your box is packed (150oz wrapped, the rest is sort of an overdue thank you for that time we met for lunch, and you brought bottles/crowlers to share and wound up just giving them to me instead), taped, labeled, and awaiting pickup. Also, I'm running a LIF here: https://www.talkbeer.com/community/threads/soylent-lif-its-people.42372/ - post out there, please, it will be easier to track/file responses. https://i.imgur.com/Ly4ujKn.gif


I chose to construct a dataset concerning the works of Italian pianist, Ludovico Einaudi . While Einaudi has composed many pieces, I chose to focus on two specifically chosen pieces because analysing more than two would be beyond the scope of this project. I decided to analyse two pieces which were written over a decade apart. The first piece, ‘I Giorni’, is written for solo piano and was released in 2001. This piece gained huge popularity and hit the UK Top 40 a mere decade later. The second, ‘Discovery at Night’, is a shorter piece written, again, for solo piano and released in 2013. This piece, although not unsuccessful, did not reach the same fame as ‘I Giorni’. As I chose these pieces, my theme developed and became a collection of data concerning two very similar pieces which were born over a decade apart but achieved varying degrees of success.
There currently lacks a fully comprehensive dataset of Einaudi’s works. This is not unsurprising due to Einaudi’s active state of work which is limited by copyright laws. There are a variety of datasets which offer one or two types of data, but, as far as I am aware, one containing all three does not exist.
Most of the notated data of Einaudi’s works are available through his self-published music. I had access to ‘Discovery at Night’ because I had purchased the book ‘In A Time Lapse’ which contained this piece. However, with the development of user generated content through Web 2.0, much of Einaudi’s music has been notated by individuals and published on open source platforms such as MuseScore. This is where I sourced the music for ‘I Giorni’.
Acoustic data for Einaudi’s works is widely available to purchase or stream via music stores, online music stores, streaming services and is also freely available to users via YouTube for example. YouTube also contains many variations of Einaudi’s music by other artists.
Descriptive data does exist with a lot of the notated and acoustic data. However, acoustic data only tends to contain non-technical descriptive data such as the song name, the genre, the date of release etc. Similarly, notated data might contain more information, but this often focuses more on the musical elements such as the key, instrumentation and pitch. While this might too contain information such as the song name, it is unlikely to contain descriptive data such as genre or date of release, particularly in the printed forms.
In terms of analysis, these datasets are reluctant to provide much. Their purpose is more one-sided and tend to serve a purpose to customers and users. For example, streaming service Spotify provides the acoustic data with the purpose of allowing customers to listen to the tracks, not necessarily for analysis. There lacks a dataset containing notated, descriptive and acoustic data with complementary analysis. While this project will not contain a full dataset or analysis of Einaudi’s works, it will provide an idea.
References:
Ludovico Einaudi’s website, available at: http://www.ludovicoeinaudi.com [last accessed 29 November 2018]
MuseScore, available at: https://musescore.com/user/12157896/scores/3365996 [last accessed 29 November 2018]
YouTube, available at: https://www.youtube.com [last accessed 29 November 2018]
Spotify, available at: https://www.spotify.com/uk/ [last accessed 29 November 2018]


Registers a function for converting objects of base_type
to Tensor
.
tf.compat.v1.register_tensor_conversion_function
tf.compat.v2.register_tensor_conversion_function
tf.register_tensor_conversion_function( base_type, conversion_func, priority=100 )
The conversion function must have the following signature:
def conversion_func(value, dtype=None, name=None, as_ref=False): # ...
It must return a Tensor
with the given dtype
if specified. If the
conversion function creates a new Tensor
, it should use the given
name
if specified. All exceptions will be propagated to the caller.
The conversion function may return NotImplemented
for some
inputs. In this case, the conversion process will continue to try
subsequent conversion functions.
If as_ref
is true, the function must return a Tensor
reference,
such as a Variable
.
NOTE: The conversion functions will execute in order of priority,
followed by order of registration. To ensure that a conversion function
F
runs before another conversion function G
, ensure that F
is
registered with a smaller priority than G
.
base_type
: The base type or tuple of base types for all objects that
conversion_func
accepts.conversion_func
: A function that converts instances of base_type
to
Tensor
.priority
: Optional integer that indicates the priority for applying this
conversion function. Conversion functions with smaller priority values run
earlier than conversion functions with larger priority values. Defaults to
100.TypeError
: If the arguments do not have the appropriate type.


Page title
This is an empty page that uses the default 3-column layout. It uses id="content" for the main content div.
Site slogan
This is the right sidebar, called #extras in the code.
This is an empty page that uses the default 3-column layout. It uses id="content" for the main content div.


Success through diligence and elegance
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Laudantium enim repellat sapiente quos architectoLaudantium enim repellat sapiente quos architecto
Each Primary One student should follow the study schedule below and solve , the questions specified or displayed.


Home
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Intro text
Event title
Info about event
2014


‘Samurai Shodown’ Heading to North American Switch Users Q1 2020
by Mike WilsonSNK’s revival of Samurai Shodown has had a Japanese release date for the Nintendo Switch for a while now, and now so does North America.
No word yet on any other region release date, or if the Switch version will incorporate the released crop of DLC fighters.
Samurai Shodown is currently available for Google Stadia, PlayStation 4 and Xbox One. The PC version will arrive later this year, while Japanese Switch users get their copy on December 12.


Strategies
问题描述 :
Background
Bill, Steve and Linus participate in programming contests just like the one you’re competing in right now. They have different strategies and we’d like to find out whose strategy is the best.
Problem
Bill simply solves the problems in the order he gets them from the contest organizers. Steve first reads all the problems and then solves them in increasing order of difficulty. Linus also reads all problems first, but he’s quite ambitious and thus solves them in decreasing order of difficulty.
The difficulty of a problem is measured in minutes it takes the guys to solve it. We have collected statistics and we’ve consulted the oracle Larry so we know for all kinds of problems how long the guys will need. We have also found out that the three of them always need the same time for each problem (which depends on the difficulty of the problem), so they only differ by their strategies.
For several contests, we’d like you to tell us the winner, the number of problems he solved and his score. The score for a single problem is the time in minutes from start of the contest until you solve it. The overall score is the sum of scores of the problems you solved. The guys never make mistakes so you don’t have to deal with penalties. The winner is the one who solved the most problems, and in case of a tie, the one with the lowest score. If there’s still a tie, then they agree that Steve wins because he always brings delicious apple pie.
Bill, Steve and Linus participate in programming contests just like the one you’re competing in right now. They have different strategies and we’d like to find out whose strategy is the best.
Problem
Bill simply solves the problems in the order he gets them from the contest organizers. Steve first reads all the problems and then solves them in increasing order of difficulty. Linus also reads all problems first, but he’s quite ambitious and thus solves them in decreasing order of difficulty.
The difficulty of a problem is measured in minutes it takes the guys to solve it. We have collected statistics and we’ve consulted the oracle Larry so we know for all kinds of problems how long the guys will need. We have also found out that the three of them always need the same time for each problem (which depends on the difficulty of the problem), so they only differ by their strategies.
For several contests, we’d like you to tell us the winner, the number of problems he solved and his score. The score for a single problem is the time in minutes from start of the contest until you solve it. The overall score is the sum of scores of the problems you solved. The guys never make mistakes so you don’t have to deal with penalties. The winner is the one who solved the most problems, and in case of a tie, the one with the lowest score. If there’s still a tie, then they agree that Steve wins because he always brings delicious apple pie.
输入:
The first line contains the number of scenarios. Each scenario describes one contest and its first line tells you how long the contest lasts (in minutes, from 30 to 1440) and the number of problems (from 3 to 24). In a second line you’ll get the difficulties of the problems, as explained above they tell you how many minutes (from 1 to 600) the guys need in order to solve the problems.
输出:
The output for every scenario begins with a line containing “Scenario #i:”, where i is the number of the scenario starting at 1. Then print a single line telling who wins, the number of problems he solves and his score. Use the exact format as shown below in the sample output, even if the winner only solves 0 or 1 problems. Terminate the output for the scenario with a blank line.
样例输入:
2 180 6 23 42 170 33 7 19 60 2 43 17
样例输出:
Scenario #1: Steve wins with 5 solved problems and a score of 288. Scenario #2: Steve wins with 2 solved problems and a score of 77.
解题代码:
//* @author<EMAIL_ADDRESS>import java.io.*; import java.util.Arrays; public class Main { public static void main(String[] args) throws IOException { InputStreamReader is=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(is); int a=Integer.parseInt(in.readLine()); int cnt=0; while((a--)!=0) { cnt++; String[] ss=in.readLine().split(" "); int t=Integer.parseInt(ss[0]); int w=Integer.parseInt(ss[1]); int[] p=new int[w]; ss=in.readLine().split(" "); for(int i=0;i< w;i++) p[i]=Integer.parseInt(ss[i]); Arrays.sort(p); int sum=0,i,j; for(i=0;i< w;i++) { if(t< p[i])break; t-=p[i]; } for(j=0;j< i;j++) sum+=(i-j)*p[j]; System.out.println("Scenario #"+cnt+":"); System.out.println("Steve wins with "+i+" solved problems and a score of "+sum+"."); System.out.println(); } } }
(adsbygoogle = window.adsbygoogle || []).push({});
为什么暴力求解方法循环到sqrt(n) 就可以了呢
总数为2n，遍历到第n个，就是中间的位置
第2题，TCP不支持多播，多播和广播仅应用于UDP。所以B选项是不对的。第2题，TCP不支持多播，多播和广播仅应用于UDP。所以B选项是不对的。
正在练习，很有帮助
华为这题目略显简单啊
此题答案确实应该是A。文中已修改，感谢一楼的提醒！
great!
面霸网。www.51mx.org
为什么for循环找到的i一定是素数叻，而且约数定理说的是n=p1^a1*p2^a2*p3^a3*…*pk^ak，而你每次取余都用的是原来的m，也就是n
神奇的网站
根本过不了。。。。
这个也是算法导论的习题
这排版…你都打开来看看改改
已更正。


Whitman toasts Chuck Cleveland
Chuck Cleveland receives a hug from his wife, Pat Sorenson '86, at his recent retirement celebration.
Whitman staff, faculty, students and alumni came together last Monday to honor Vice President of Student Affairs/Dean of Students Chuck Cleveland, who retired this year after 36 years of service to the college. Cleveland began working at Whitman as assistant director/support services in 1981, became acting director of housing in 1984, assumed the title of director of housing six months later in 1985, rose to dean of students in 1994 and became vice president for student affairs in 2015.
Colleagues congratulated him on his long and storied career and presented him with a book of remembrances. A tribute video by film and media studies major Tywin Kelly '18 captured additional fond sentiments, as did a performance of Tim McGraw's 2015 hit single "Humble and Kind" by residence life staff. Read more.
The Fountain now on reduced schedule
This week's Fountain will be the last weekly issue until the start of the fall 2017 semester. The reduced summer schedule will include one issue of The Fountain published on the last Monday of the month for June and July. Submissions will still be accepted throughout the summer. Please submit at least three business days before anticipated publication. The Fountain returns to a weekly publication on Monday, Aug. 21.
To submit, email<EMAIL_ADDRESS>or fill out the News Tips form at the bottom of the page.
OP to offer discounts on merchandise, weekend rentals
In honor of Staff Recognition Day next Friday, June 2, the Outdoor Program Rental Shop will offer all Whitman staff and faculty 20 percent off retail merchandise, a $20 coupon or 50 percent off of a weekend rental for the weekend of June 2-5 (minor exclusions apply for raft rentals). The shop will be open from the close of the staff breakfast until 1:30 p.m. that day for people to rent gear.
Questions? Contact Outdoor Program Rental Shop Manager Lish Riley.
Parting Shot
by Matt Banderas, visual editor/photographer
The Fountain is published by the Office of Communications.
Send news relevant to staff and faculty members to<EMAIL_ADDRESS>for inclusion in The Fountain. Photos are accepted and submissions are due by Tuesday at 5 p.m. for the following week's issue.
For news relevant to external audiences, use our online News Tips form.
Compiled by: Gillian Frew


Hi all,
I'm using the 3 phase sketch on Emontx v3.4 and I'm interested in exact values (2 decimals) of the Power factor and exact values of the current (1 decimal).
The serial print shows the right decimals but de RF module sends only integers. I can send the data by multiplying the data by 10 or 100 to get a higher accuracy, but that has to be post processed. So not preferable.
Is there a way to include decimals in the data package of rfm?
Re: Send Decimals with RFM
In the payload structure, try to change the type from "int" to "float".
I have some values set up this way, and they work. You probably need to edit your emonhub config also.
Re: Send Decimals with RFM
You can use floats rather than ints in your payload structure as Biere suggests or scale as you have already mentioned, either will require "post-processing" the difference being firstly the size, range and accuracy of the value, a float is 4 bytes and has a massive range but it's accuracy is questionable (not likely to be a problem here), a scaled signed int still only uses 2 bytes (so halve the size) with a range of -32767 to 32768 before scaling (so -327.67 to 327.68 at 2 digits of precision) with no question over accuracy.
Using scaling has the added advantage of being transmitted and passed to emoncms with no additional processing until it arrives in enmoncms, where as using the datacodes and/or scaling in emonhub means the real values are available sooner before posting to emoncms or elsewhere .
It was for this reason emonhub has the ability to scale and use other data types, previously the stream of bytes was always post-processed from 2byte pairs as unsigned ints without any variation, now the default use of integers is just a backward compatibility legacy.
Paul
Re: Send Decimals with RFM
Both thanks!
I have multiplied the values in my sketch and scaled it emoncms.
It seemed to me cumbersome, but in the case of the maximum number of bytes it is better to use scales. I use for ct1-4 the power, apparentPower, powerFactor and the current, so it must be 2 bytes otherwise the maximum package of the RFM will be exceeded.
Sketch adjustment:
Emonhub.conf node decoder:
Re: Send Decimals with RFM
Shouldn't Vrms be scaled by 0.01 in emonhub.conf too? otherwise the units should be mV or does your sketch only report whole Volts?
As a side note, if payload size is a concern, and the power factor is always within the -1,27 to 1.28 or the 0 to 2.55 ranges (I know it should be, but do not know the extremes the sketch could report) you could use a single signed or unsigned byte/char (b or B) saving an additional 4 bytes of payload.
Paul
Re: Send Decimals with RFM
First of all thanks for thinking along
About Vrms it can, but accuracy isn't that interesting for me. I'm going to monitor milking systems of dairy farms and I am now setting up the first Emontx (will be 6 in future). I want to compare different farms and find why there is a big difference in usage. Probably due to efficiency of the systems. The integers will show me that there is a voltage drop, what will be only significant when it's more than a number of volts.
I'm not that familiar with programming, so I don't know what to change to save another 4 bytes as you mentioned with changing b or B.
Re: Send Decimals with RFM
Power factor should never be greater than 1, however due to rounding errors in the maths, it can be slightly greater. If power is being returned to the supply, it can be negative. What Paul was saying is, if you define the power factor in the Payload as "char powerFactor1", ('char' is a signed byte) then having calculated the value, you fill the payload with
"emontx.powerFactor1 = powerFactor1 * 100;"
then you'll get a number that you can divide by 100 in emonHub to give the correct value (truncated to 2 decimal places) as before, but it occupies only 1 byte in the Payload. Use datacode 'b' in emonHub for each of the power factor values. i.e., you'll need:
datacodes = h, h, b, h, h, h, b, h, h, h, b, h, h, h, b, h, h


--- layout: archive title: Zulip Chat Archive permalink: /stream/113488-general/topic/Tactic.20writing.20tutorial.html ---
More and more people are writing tactics, and providing bits of explanations here, but I never remember. So I decided to use my last hope option: I tried to teach it. The result is at https://github.com/leanprover-community/mathlib/blob/tactic_tutorial/docs/extras/tactic_writing.md Not only I hope this will help me remember this stuff, but also I hope it will allow experts to clear my misconceptions. And of course it would be a nice extra if it could teach someone something useful, so I'd be interested to know if any tactic writing newbie can read it (I know Johan already read it, because he carefully monitors our community repository).
Of course I also hope more stuff will be added here, by me or others. Don't hesitate to contribute, it's in the community repository.
This is a really nice writeup. A comment: the "pseudo-python" syntax
t = infer_type(H) return H if unify(e, t) else find_matching_type(e, HS)
was a bit confusing for me due to the infix conditional. Is this really how they do it in python? How about something a bit more C-like:
t = infer_type(H) if unify(e, t): return H else: find_matching_type(e, HS)
although it occurs to me that what lean is doing with unify
is more like a try catch than a conditional:
t = infer_type(H) try: unify(e, t) return H catch: find_matching_type(e, HS)
What I wrote is indeed valid python
Yes, I thought so as well. So why did you call it pseudo-python?
But I agree the try
/except
(not catch) version is closer to what is happening in Lean. But I didn't want to include too much python...
You guys need to learn more python
(NB: I don't know python, I'm inventing pythonic syntax on the fly. code highlighting says the word isn't catch
)
ah
Maybe I should switch to a more generic imperative pseudo-code
the funny thing is I've written several complete programs in python, but some of the syntax differences are meh
@Jeremy Avigad you should take a look at this
Parsing a token is introduced by
lean.parser.tk
followed by a string which must be taken from a predetermined list (the initial value of this list seems to be hardwired into Lean source code, infrontends/lean/token_table.cpp
).
This list is added to when you use literals in notation
, infix
, or precedence
.
Importantly, marking something as a token causes it to no longer be a valid name, just like have
which is why so many interactive tactics use the same few tokens :
using
generalizing
with
for separators
Thanks Mario, this is one of the places where I hoped there would be clarifications
Jeremy, I hope you don't mind I'm invading PIL's territory, but this tutorial is written from a different perspective, more hands-on and shallow. And of course you can contribute too!
Note to myself: I should replace paths to the core library or Lean source code with actual http links
For the monad cheat sheet:
return
: produce a value in the monad (type: A -> m A
)ma >>= f
: get the value of type A
from ma : m A
and pass it to f : A -> m B
.  Same as do a <- ma, return (f a)
ma >> mb
: same as do a <- ma, mb
; here the return value of ma
is ignored and then mb
is called. Alternate syntax: do ma, mb
mf <*> ma
: same as do f <- mf, f <$> ma
, or do f <- mf, a <- ma, return (f a)
.ma <* mb
: same as do a <- ma, mb, return a
ma *> mb
: same as do ma, mb
, or ma >> mb
. Why two notations for the same thing? Historical reasonspure
: same as return
. Again, historical reasonsfailure
: failed value (specific monads usually have a more useful form of this, like fail
and failed
for tactics)ma <|> ma'
recover from failure: runs ma
and if it fails then runs ma'
.a $> mb
: same as const a <$> mb
or do mb, return a
ma <$ b
: same as const b <$> ma
or do ma, return b
oof <*
and <$
are so confusing... "return the value on the ???"
Does anyone know how to print the list of currently registered tokens?
#print notation
hm, generalizing
isn't on that list
with and using are not there either
Reading the code, I don't see any other way of listing all tokens, although you can test if a name is a token easily enough
i.e. #print wit
and #print with
give different errors
so... it is a Δ1 set
a $> mb
: same asconst a <$> mb
ordo mb, return a
ma <$ b
: same asconst b <$> ma
ordo ma, return b
Are these const
descriptions really correct? It looks like const
is missing its type argument
it's implicit
const a := λ_, a
Actually most of these are actually defined using const
, many more than I used, but it's not a very transparent way to write it
map_const α β := map ∘ const β
crystal clear
map_const
is <$
btw
oops, it's not implicit
Here I see function.const : Π {α : Sort u_1} (β : Sort u_2), α → β → α
And I don't see how it would make sense to have it implicit
how would you infer it?
you would normally write that with B implicit
because it's inferrable from the last argument
when you apply the constant function yes, but not when talking about the function
but const
is often used partially applied, and in that case having it implicit can be problematic
we're almost synchronous
So, should I open a PR, or are there more suggestions, contributions, or questions?
This looks really nice, Patrick, thanks! I see a few small mistakes/typos. I can make adjustments myself or comment on a PR, either way is no problem. But it's bedtime now, so tomorrow.
@Patrick Massot Indeed, this is very nice. Do you want to consider becoming one of the authors of Programming in Lean? For personal reasons, I'd like to maintain tight control over TPiL (because it has been a labor of love for a number of years), but we never got very far with PiL, and I'd be happy to have collaborators for that. (We added Jared Roesch to the list of authors early on, because he intended to work on it, but in the end he never did, so his name should be removed.) In Amsterdam, I can show you how to set up and maintain the Sphinx repository (but maybe you are already comfortable doing that). A caveat: the repository is set up for a Linux installation of Sphinx, and I don't know if it is possible to get it running on Windows. (I know that Rob Lewis has had trouble getting our Logic and Proof running on Windows.)
@Jeremy Avigad Thanks for the kind words and your trust. I think there is room for both an informal tutorial and PIL. But I'd love to help with any documentation project. I've already compiled TPIL, so I guess I could handle compiling PIL as well. I'm tempted to write we can discuss all this in Amsterdam, but unfortunately I'll be extremely busy after the Amsterdam workshop, so maybe we should start now, especially if you have something specific in mind (not that I really have time, but it will be much worse after Christmas).
@Rob Lewis please feel free to correct typos and mistakes directly. The community repository is dedicated to that. I think you can even do the correction from github, without pulling the branch. And pulling the branch won't be a problem either, there is nothing to compile, it's all markdown.
Actually maybe we should consider including a Lean file gathering all examples from the tutorial. I have it on my computer of course, but I wouldn't know where to put it in the repository
{% endraw %}Last updated: Apr 24 2020 at 19:02 UTC


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Autogyro
Stackulator
Autogyro
Manually adjust your device orientation; no gyroscope or fumbling necessary.
Download Autogyro
1.0.0-rc3
Works on Android 5.0 (Lollipop) and up.


Curly and Floppy Twistytail, the Funny Piggie Boys
by Howard R. Garis
Chapter 17: “Mr. Twistytail’s Lost Hat”
Additional Information
- Year Published: 1918
- Language: English
- Country of Origin: United States of America
- Source: Garis, H. R. (1918). Curly and Floppy Twistytail, the Funny Piggie Boys. New York, NY: A. L. Burt Co.
-
Readability:
- Flesch–Kincaid Level: 4.3
- Word Count: 1,381
- Genre: Fantasy
- ✎ Cite This
Downloads
“Hey, Curly can you be out?” called Peetie and Jackie Bow Wow, the puppy dogs, as they stood in front of the piggie boys’ house one morning when there was no school. I forget whether it was Saturday or because the owl lady school teacher had to go and take her music lesson.
 Hey, Flop! Come on out!”
“Of course we will!” cried Curly. “What are you going to do?” and he and his brother hurried with their breakfast and ran out in the yard.
“Let’s play football game,” suggested Jackie, “like we did the other day.”
“No, let’s go off in the woods and play camping out,” suggested Curly.
“Yes, that will be more fun,” added Flop, and then the two puppy dog boys thought the same thing, so off to the woods they started.
“I wish I could go,” said Baby Pinky, as she their chums.
“Never mind, Pinky,” said Mrs. Twistytail. “I’m going to bake pies, and I’ll make a specially little one just for you.”
“Oh, goodie!” cried Pinky, and then she went out in the yard to play in her go-cart.
But now let us see what happened to Curly and Flop, to say nothing of Peetie and Jackie Bow Wow. On and on they went through the woods, and pretty soon Jackie found a nice juicy bone, and Peetie found a bit of meat, while Flop found an ear of corn and his brother picked up a big turnip.
“Oh, joyfulness!” exclaimed Flop. “Now we can have a lunch in the woods, just like real camping out!” And so they did. Under a tree, on the soft leaves that floated down from the branches above, with a flat stone for a table, and sticks for knives and forks, the piggie boys and their chums ate their lunch and had lots of fun. Then Curly said:
“Now let’s play soldier,” and so they did, with sticks for guns, and when the boy animals called out: “Boom! Boom!” and “Bang! Bang!” it sounded as real as anything.
Well, they were running around in the woods, shouting and laughing and making believe they were soldiers at war, when all at once, just as Curly passed in front of a hole that seemed to go away under ground, he saw something roll out. It was something round and black and hollow, and at first the little piggie boy thought it was a big black stone. But, when he looked a little closer, he saw that it was a hat—a man-pig’s hat—just the kind they always wear.
“Oh, Flop! Oh, fellows! Come here!” called Curly. “See what rolled out of the hole under this old tree.”
Of course, they all came running up at that, and stopped playing soldier, and they gathered around the hat.
“Whose is it?” asked Jackie Bow Wow.

“It’s our papa’s hat!” suddenly cried Flop. “I can tell because it’s got his initials inside,” and, surely enough there were the letters “A.T.” inside the hat, standing for “Archibald Twistytail.”
“Our papa’s hat!” exclaimed Curly.  “Papa has lost his hat.”
“But it rolled out of that hole,” said Curly, “and it isn’t lost, for we have found it.”
“Then if papa’s hat came out of that hole, our papa must be in there,” said Flop.
“Why, of course,” agreed Jackie Bow Wow.
“But what is he doing in there?” asked Curly, “and what sort of a place is it? I can’t see him,” he added, as he stooped down and tried to look into the hole.
 It’s a wolf’s den, and the wolf has our papa, Most likely he’s eating him now, and he threw the hat out because he couldn’t chew it—the wolf, I mean.”
“Oh!” cried Curly, jumping up and down, he felt so badly.
“Oh; oh!” barked Jackie Bow Wow.
“Oh! oh! Double Oh!” growled Peetie Bow Wow. “What shall we do?”
“We must get him out of there!” exclaimed Flop as quickly as a rubber band can play the “Annie Laurie” song. “There are four of us here, and we have our wooden guns. I guess we are a match for one wolf. We must save our papa.”
“Of course!” agreed Curly, bravely.
“But how?” asked Jackie Bow Wow.
“Listen,” said Flop, just like a telephone girl.
“A wolf always have two doors to his den—a back one and a front one. This is the front one—where our papa’s hat rolled out.  The wolf will think some company has come to supper with him, and he’ll run to the back door.
“Peetie and I will stay at the front door,” said Flop. “As soon as we hear you making the noise we’ll rush in the den by the front door and get papa and help him out. Then we’ll all run away.”
Well, every one thought that was a fine plan, and they did just as Flop said. The wolf came rushing to his back door when he heard the noise there, and maybe he wasn’t surprised to see Curly and the puppy dog! Then Flop and Peetie rushed in the front door, and there, inside the den, they found poor Mr. Twistytail tied to the table leg.
“Quick!” cried Flop. “Bite the ropes, Peetie.” And the puppy dog did, and Mr. Twistytail was free. “Now, come with us!” cried Flop, and he and his papa and Peetie ran out of the wolf’s den just in time, for the bad creature, seeing he had been fooled at his back door, rushed up to bite the pig gentleman.
But he was too late, that wolf was, for the piggie boys and their papa and the puppy dog boys got safely away, and the wolf didn’t dare follow because he was afraid of the wooden guns. Then when they were all safe home, including the hat, Mr. Twistytail told how the wolf caught him as he was coming back from work, and how his hat accidentally rolled out of the den. And if it hadn’t been for the hat maybe Mr. Twistytail would not have been saved.
Anyway, he was not hurt a bit, and in the next story, in case the bicycle doesn’t roll over the egg basket and make an omelet out of the pin cushion, I’ll tell you about Mamma Twistytail’s new bonnet.


Who owns the Amiga?
问题描述 :
In these rooms live five students Anna, Bernhard, Chris, David and Ellen of five different nationalities Danish, Finnish, Icelandic, Norwegian and Swedish. (Both the names and the nationalities are given in alphabetical order, so it does not follow automatically that Anna is Danish.)
These students have one computer each, and these computers are of different kinds: Amiga, Atari, Linux, Mac and Windows (given here in alphabetical order). They each have their own favourite programming language: C, C++, Java, Pascal and Perl (also listed in alphabetical order).
You want to find out who owns the Amiga computer based on some facts about the students.
输入:
Each scenario starts with a line with a number 1?000 telling how many fact lines there are for that scenario. Then follow the fact lines which each contains three words separated by one or more spaces:
－－－The first and third word is one of these names:
1 2 3 4 5
blue green red white yellow
anna bernhard chris david ellen
danish finnish icelandic norwegian swedish
amiga atari linux mac windows
c c++ java pascal perl
(Note that no uppercase letters are used.)
－－－The second word specifies a relationship; it is one of
same-as left-of right-of next-to
same-as tells that the first and third fact words apply to the same room; for instance
blue same-as bernhard
tells that Bernhard lives in the room with a blue door.
left-of tells that the first fact word applies to the room immediately to the left of the one to which the third fact word applies. For example,
chris left-of perl
means that Chris lives in the room immediately to the left of the Perl programmer.
right-of tells that the rst fact word applies to the room immediately to the right of the one to which the third fact word applies.
next-to tells that the two fact words apply to rooms next to each other. For example,
swedish next-to linux
means that the Swedish student lives in the next room (either to the left or the right) of the owner of the Linux computer.
You may assume that there are no inconsistencies in the input data. In other words, there will in every scenario be at least one person who may own the Amiga without violating the constraints.
输出:
Each scenario starts with a line with a number 1?000 telling how many fact lines there are for that scenario. Then follow the fact lines which each contains three words separated by one or more spaces:
－－－The first and third word is one of these names:
1 2 3 4 5
blue green red white yellow
anna bernhard chris david ellen
danish finnish icelandic norwegian swedish
amiga atari linux mac windows
c c++ java pascal perl
(Note that no uppercase letters are used.)
－－－The second word specifies a relationship; it is one of
same-as left-of right-of next-to
same-as tells that the first and third fact words apply to the same room; for instance
blue same-as bernhard
tells that Bernhard lives in the room with a blue door.
left-of tells that the first fact word applies to the room immediately to the left of the one to which the third fact word applies. For example,
chris left-of perl
means that Chris lives in the room immediately to the left of the Perl programmer.
right-of tells that the rst fact word applies to the room immediately to the right of the one to which the third fact word applies.
next-to tells that the two fact words apply to rooms next to each other. For example,
swedish next-to linux
means that the Swedish student lives in the next room (either to the left or the right) of the owner of the Linux computer.
You may assume that there are no inconsistencies in the input data. In other words, there will in every scenario be at least one person who may own the Amiga without violating the constraints.
样例输入:
2 8 red same-as 1 danish same-as 1 perl same-as 5 atari same-as 2 linux same-as 3 mac same-as 4 windows same-as 5 anna same-as 1 8 chris left-of amiga chris left-of 4 c same-as 1 danish same-as 1 red same-as 1 linux same-as red windows next-to linux mac left-of swedish
样例输出:
scenario #1: anna owns the amiga. scenario #2: cannot identify the amiga owner.
remove没有实现
0000
老实说，这种方法就是穷举，复杂度是2^n，之所以能够AC是应为题目的测试数据有问题，要么数据量很小，要么能够得到k == t，否则即使n = 30，也要很久才能得出结果，本人亲测
.net中char类型不是两个字节么
.net中char类型不是两个字节么
不错，感谢分享。
顺利测试通过了，多谢
嗯，尽量吧。题目太多了，很多解题报告是用程序自动发布的，所以就只有代码了
分析的很专业！
先从简单的做起，归并排序，二叉树相关的遍历等
嗯，尽量吧。题目太多了，很多解题报告是用程序自动发布的，所以就只有代码了
此题的样例描述不正确
顶一个 赞一个
这个差别应该不会太大，或许编辑器就自动优化成内联函数了


{% trans 'interaction created' as matched_singular_text %}
{% trans 'interactions created' as matched_plural_text %}
{% include 'admin/interaction/interaction/fragment_import_count_line.html' with count=num_matched singular_text=matched_singular_text plural_text=matched_plural_text only %}
{% trans 'record skipped as it could not be matched with an active contact' as unmatched_singular_text %}
{% trans 'records skipped as they could not be matched with an active contact' as unmatched_plural_text %}
{% include 'admin/interaction/interaction/fragment_import_count_line.html' with count=num_unmatched singular_text=unmatched_singular_text plural_text=unmatched_plural_text only %}
{% trans 'record skipped as it was matched with more than one active contact' as multiple_matches_singular_text %}
{% trans 'records skipped as they were matched with more than one active contact' as multiple_matches_plural_text %}
{% include 'admin/interaction/interaction/fragment_import_count_line.html' with count=num_multiple_matches singular_text=multiple_matches_singular_text plural_text=multiple_matches_plural_text only %}


(function() { var tmpl; tmpl = toffee.templates["/"] = { bundlePath: "/" }; tmpl.render = tmpl.pub = function(__locals) { var __repress, _ln, _to, _ts, i, len, ref, supply; __locals = __locals || {}; __repress = (ref = __locals.__toffee) != null ? ref.repress : void 0; _to = function(x) { return __locals.__toffee.out.push(x); }; _ln = function(x) { return __locals.__toffee.lineno = x; }; _ts = function(x) { return __locals.__toffee.state = x; }; toffee.__augmentLocals(__locals, "/"); with (__locals) {; __toffee.out = []; _ts(1); _ts(2); for (i = 0, len = supplies.length; i < len; i++) { supply = supplies[i]; _ts(1); _ts(1); _ln(2); _to("


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Innovation Embassy is a Danish company that helps individuals to make their ideas a reality through crowdsourcing talents. During my study abroad experience in Copenhagen, Denmark the company came in as a client and pitched the task of redesigning their user interface. We were tasked with simplifying the sign-up process and making real-time collaboration easier. We eliminated some of the sign-up steps by integrating the use of social media and creating a platform that encouraged simultaneous work.
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Performing requestsedit
Once the RestClient
has been created, requests can be sent by calling one of
the available performRequest
or performRequestAsync
method variants.
The performRequest
methods are synchronous and they return the Response
directly, meaning that the client will block and wait for a response to be returned.
The performRequestAsync
variants, which return void
and accept an extra
ResponseListener
as an argument, are executed asynchronously. The provided
listener will be notified upon completion or failure.
// Synchronous variants Response performRequest(String method, String endpoint, Header... headers) throws IOException; Response performRequest(String method, String endpoint, Map<String, String> params, Header... headers) throws IOException; Response performRequest(String method, String endpoint, Map<String, String> params, HttpEntity entity, Header... headers) throws IOException; Response performRequest(String method, String endpoint, Map<String, String> params, HttpEntity entity, HttpAsyncResponseConsumerFactory responseConsumerFactory, Header... headers) throws IOException; // Asynchronous variants void performRequestAsync(String method, String endpoint, ResponseListener responseListener, Header... headers); void performRequestAsync(String method, String endpoint, Map<String, String> params, ResponseListener responseListener, Header... headers); void performRequestAsync(String method, String endpoint, Map<String, String> params, HttpEntity entity, ResponseListener responseListener, Header... headers); void performRequestAsync(String method, String endpoint, Map<String, String> params, HttpEntity entity, HttpAsyncResponseConsumerFactory responseConsumerFactory, ResponseListener responseListener, Header... headers);
Request Argumentsedit
The following are the arguments accepted by the different methods:
-
method
- the http method or verb
-
endpoint
-
the request path, which identifies the Elasticsearch API to
call (e.g.
/_cluster/health
) -
params
- the optional parameters to be sent as querystring parameters
-
entity
-
the optional request body enclosed in an
org.apache.http.HttpEntity
object -
responseConsumerFactory
-
the optional factory that is used to create an
org.apache.http.nio.protocol.HttpAsyncResponseConsumer
callback instance per request attempt. Controls how the response body gets streamed from a non-blocking HTTP connection on the client side. When not provided, the default implementation is used which buffers the whole response body in heap memory, up to 100 MB -
responseListener
- the listener to be notified upon asynchronous request success or failure
-
headers
- optional request headers


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I have been featured and published in Us Weekly Magazine working with the MTV Stars from Teen Mom, Maci and Catelyn. I styled their hair for the 10 year reunion of the ongoing inspiring show, Teen Mom OG. As a single mother myself, I relate to the show and am a fan myself. I watched it over the years to build strength and independence!
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General Information:
Project is hosted on azure at: http://myfirstproject.azurewebsites.net/
Github repository is at: https://github.com/inmWill/MyFirstProject
Local copy is at c:\projects\myfirstproject
Helpful Resources:
Bootstrap CSS Framework: http://getbootstrap.com/
TODO: find more helpful resources (google)
Workflow Git Procedures:
Check remote git for any updates missing on local machine:
Open Git Shell and type the following one by one.
cd\
cd\projects\myfirstproject
git pull
Sync remote git from local:
Open Git Shell and type the following one by one.
cd\
cd\projects\myfirstproject
git add .
git commit -a -m "Brief summary of work done"
git push
(this will also trigger a deployment and update live site... so fancy...)
Diana's web dev learning path:
Phase 1 (Work Complete!):
- Setup Development Environment, source control and hosting Completed!
- Create a simple single page site with minimal html and css formatting (Hello World!) Done!
- Establish a general workflow procedure for making updates to the site and deploying said updates Finished!
Phase 2 (Ongoing):
- Add Bootstrap css framework and format the document to your hearts desire You are here!
- Add more pages and create simple navigation between them.
- Refactor HTML into a template based approach for reusing header, menu and footer components.
- Play around with bootstrap jquery plugins for some fun and fancy interactions.
Phase 3 aka Protractor Returns:
- Now we combine the two learning paths into one glorious confrontation; the hard fought battle between developers and QAs culminates in an epic battle of the ages. (lets conveniently ignore the fact that you are both developer and QA in this context)
- Create a new project in the same solution for testing MyFirstProject (maybe call it, MyFirstProtractorProject, extra bonus points for creativity)
- Create protractor configuration and spec files (time to bust out your previous cheat sheet, or bribe Will he likes bribes)
Test general items like expected page title, do page links send the user to the correct page, exactly how much free time does William have? (that one will be tricky to test, might need to research some new locators)
Phase 4 and so on (TODO: come up with phase 4 and so on)
...
So you've made it this far without closing the document or taking a nap so what's next?
As you experiment and become more familiar with web development in Phase 2 the following items might be fun to implement, or they could be mind numbing and make you want to set me on fire... Either way you'll be learning. :) (if you're going to set me on fire at least let me have some queso first).
- Add a content area and fill it with content (redundancy!)
- Add a footer to the page and put some helpful copy-write text (don't want anyone ripping off your hard work yo.)
- Add a picture to the page (play around with saving it as a smaller resolution in a Paint program or it will steal all your bandwidth)
- Add some bootstrap containers or other elements (time to read bootstrap documentation! yay! (is that supposed to be fun? what is wrong with him...))
- Add menu links to the right side container that send the user to a new page (now we're getting complicated...)
- Add the menu and header items into templates so they can be shared across all the new pages (less repeated code makes engineers happy)


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To manage locks in JE, you must do two things:
Manage lock timeouts.
Detect and respond to lock conflicts. Conceptually, these are deadlocks. But from a coding point of view there is no difference between what you do if a lock times out, and what you do if you encounter a deadlock. In fact, in JE, you cannot tell the difference based on the exceptions that are thrown.
Like transaction timeouts (see Configuring the Transaction Subsystem), JE allows you to identify the longest period of time that it is allowed to hold a lock. This value plays an important part in performing deadlock detection, because the only way JE can identify a deadlock is if a lock is held past its timeout value.
However, unlike transaction timeouts, lock timeouts are on a true timer. Transaction timeouts are only identified when JE is has a reason to examine its lock table; that is, when it is attempting to acquire a lock. If no such activity is occurring in your application, a transaction can exist for a long time past its expiration timeout. Conversely, lock timeouts are managed by a timer maintained by the JVM. Once this timer has expired, your application will be notified of the event (see the next section on deadlock detection for more information).
You can set the lock timeout on a transaction by transaction basis, or for the entire environment. To
set it on a transaction basis, use Transaction.setLockTimeout()
.
To set it for your entire environment, use EnvironmentConfig.setLockTimeout()
or use the je.lock.timeout
parameter in the je.properties
file.
The value that you specify for the lock timeout is in microseconds. 500000
is used by
default.
Note that changing this value can have an affect on your application's performance. If you set it too low, locks may expire and be considered deadlocked even though the thread is in fact making forward progress. This will cause your application to abort and retry transactions unnecessarily, which can ultimately harm application throughput. If you set it too high, threads may deadlock for too long before your application receives notification and is able to take corrective action. Again, this can harm application throughput.
Note that for applications in which you will have extremely long-lived locks, you
may want to set this value to 0
. Doing so disables lock timeouts
entirely. Be aware that disabling lock timeouts can be dangerous because then your
application will never be notified of deadlocks. So, alternatively, you might want
to set this value to a very large timeout (such as ten minutes) if your application
is using extremely long-lived locks.
A deadlock is the result of a lock conflict that cannot be resolved by the underlying JE code before the lock times out. Generically, we consider this situation a lock conflict because there is no way to tell if the lock timed out because of a true deadlock, or if it timed out because a long-running operation simply held the lock for too long a period of time.
When a lock conflict occurs in JE, the thread of control holding
that lock is notified of the event using a
LockConflictException
exception. Note
that this exception is actual a common base class for several
exception classes that might be able to give you more of a
hint as to what the actual problem is. However, the
response that you make for any of these exceptions is
probably going to be the same, so the best thing to do is
simply catch and manage LockConflictException
.
When a LockConflictException
is
thrown, the thread must:
Cease all read and write operations.
Close all open cursors.
Abort the transaction.
Optionally retry the operation. If your application retries operations that are aborted due to a lock conflict, the new attempt must be made using a new transaction.
If a thread has encountered a lock conflict, it may not make any additional database calls using the transaction handle that has experienced the lock conflict.
For example:
// retry_count is a counter used to identify how many times // we've retried this operation. To avoid the potential for // endless looping, we won't retry more than MAX_DEADLOCK_RETRIES // times. // txn is a transaction handle. // key and data are DatabaseEntry handles. Their usage is not shown here. while (retry_count < MAX_DEADLOCK_RETRIES) { try { txn = myEnv.beginTransaction(null, null); myDatabase.put(txn, key, data); txn.commit(); return 0; } catch (LockConflictException le) { try { // Abort the transaction and increment the // retry counter if (txn != null) { txn.abort(); } retry_count++; if (retry_count >= MAX_DEADLOCK_RETRIES) { System.err.println("Exceeded retry limit. Giving up."); return -1; } } catch (DatabaseException ae) { System.err.println("txn abort failed: " + ae.toString()); return -1; } } catch (DatabaseException e) { // If we catch a generic DatabaseException instead of // a LockConflictException, we simply abort and give // up -- we don't retry the operation. try { // Abort the transaction. if (txn != null) { txn.abort(); } } catch (DatabaseException ae) { System.err.println("txn abort failed: " + ae.toString()); } return -1; } }


Ping-Pong Game!
Rules!
Count a number from one to the chosen number with the following exceptions:
- Numbers divisible by 3 are replaced with "ping"
- Numbers divisible by 5 are replaced with "pong"
- Numbers divisible by 15 are replaced with "ping-pong"
Here is your results:


Lebanon private sector group calls for nationwide strikes: statement
BEIRUT (Reuters) - A Lebanese business grouping that covers much of the country’s private sector called on Monday for a general strike, according to a statement from the group, amid protests and worsening economic conditions.
“The economic bodies have decided unanimously to call for the implementation of a general strike to close all private institutions in the country on Thursday, Friday and Saturday,” the statement said.


Back

 Wonders of Italy

Jul 6, 2019

Overview

The Italian Republic is a history lover’s paradise with thousands of museums, churches and archaeological sites dating back to Roman and Greek times. Visitors will also find a hub for fashion and culture unlike anywhere else in the world. Explore Ancient history in Rome at the Colosseum and Rome’s Ruins. Rome’s greatest gladiator arena has history of unimaginable violence—games that would last 100 days in some cases and involve the slaughter of up to 10,000 animals—but today, it is one of the most majestic sites for Italian tourism.

Book Rome Attraction Tickets

Book accommodation

Rome Trips

 Trip Type	 Duration	 Price

 Family Walk Around Rome	 Day Trip (approx. 6 hours)	 50 euro per person

 Sightseeing Trip Around Rome	 Two Days (includes travel and accommodation)	 200 euro per person

 Custom Trips	 Defined by Customer	 To be Determined

 Trip Ideas

 Take a trip to the Sistine Chapel in Vatican City where Michelangelo’s Genesis (Creation), commissioned by Pope Julius II and painted by Michelangelo between 1508 and 1512, attracts droves of visitors each year.

 Take a water-bus tour of the Grand Canal and stop along the way for a bite to eat and some shopping. Take in the most famous of the city’s churches and one of the best known examples of the Italo-Byzantine architecture, the Basilica of Saint Mark, which lies at the eastern end the Piazza San Marco, adjacent and connected to the Doge’s Palace. And don’t miss the Duomo of Florence.

Visit beautiful Villa Borghese Gardens The Gardens cover an area of 80 hectares and were developed in 1606 by Cardinal Scipione Borges, who wanted to turn his former vineyard into the most extensive gardens built in Rome.


This documentation is for version {{ version }}, which is not released yet.
You can check it out from Subversion or look for released versions in the Python Package Index.
{% else %}Current version: {{ version }}
Get Sphinx from the Python Package Index, or install it with:
easy_install Sphinx{% endif %}
Join the Google group:
or come to the #python-docs channel on FreeNode.
You can also open an issue at the tracker.


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Object org.apache.spark.scheduler.StageInfo
public class StageInfo
:: DeveloperApi :: Stores information about a stage to pass from the scheduler to SparkListeners.
| Constructor Summary | |
|---|---|
StageInfo(int stageId,
int attemptId,
String name,
int numTasks,
scala.collection.Seq<RDDInfo> rddInfos,
scala.collection.Seq<Object> parentIds,
String details)
|
| Method Summary | |
|---|---|
scala.collection.mutable.HashMap<Object,AccumulableInfo> |
accumulables()
Terminal values of accumulables updated during this stage. |
int |
attemptId()
|
scala.Option<Object> |
completionTime()
Time when all tasks in the stage completed or when the stage was cancelled. |
String |
details()
|
scala.Option<String> |
failureReason()
If the stage failed, the reason why. |
static StageInfo |
fromStage(org.apache.spark.scheduler.Stage stage,
scala.Option<Object> numTasks)
Construct a StageInfo from a Stage. |
String |
name()
|
int |
numTasks()
|
scala.collection.Seq<Object> |
parentIds()
|
scala.collection.Seq<RDDInfo> |
rddInfos()
|
void |
stageFailed(String reason)
|
int |
stageId()
|
scala.Option<Object> |
submissionTime()
When this stage was submitted from the DAGScheduler to a TaskScheduler. |
| Methods inherited from class Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public StageInfo(int stageId, int attemptId, String name, int numTasks, scala.collection.Seq<RDDInfo> rddInfos, scala.collection.Seq<Object> parentIds, String details)
| Method Detail |
|---|
public static StageInfo fromStage(org.apache.spark.scheduler.Stage stage, scala.Option<Object> numTasks)
Each Stage is associated with one or many RDDs, with the boundary of a Stage marked by shuffle dependencies. Therefore, all ancestor RDDs related to this Stage's RDD through a sequence of narrow dependencies should also be associated with this Stage.
stage
- (undocumented)numTasks
- (undocumented)
public int stageId()
public int attemptId()
public String name()
public int numTasks()
public scala.collection.Seq<RDDInfo> rddInfos()
public scala.collection.Seq<Object> parentIds()
public String details()
public scala.Option<Object> submissionTime()
public scala.Option<Object> completionTime()
public scala.Option<String> failureReason()
public scala.collection.mutable.HashMap<Object,AccumulableInfo> accumulables()
public void stageFailed(String reason)
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