The abstract section is useful in general when the content that you want to place as
the initial paragraph of a topic cannot be placed in a short description, for
example in case it contains lists or tables. If the same content can be placed
within a short description then use a shortdesc
element
instead.
Use alternate titles to provide a specific title that should be used in creating a table of contents (for navigation) or a title specific to search results. When there are no alternate titles, the topic title is used for all title purposes.
Use the prolog section to provide information like author, copyright and metadata.
Use sections to organize subsets of information that are directly related to a topic.
Use a code block to mark lines of program code. Whitespace inside a code block will
be preserved and the output rendering is usually done with a monospaced
font.
Use a definition list to provide definitions for specific terms. The term is
specified in a definition term (dt
element) and the
definition is marked with a definition description (dd
element).
Use a parameters list to mark up parameters and their definitions. A parameter is is
specified in a parameter term (pt
element) and the
definition is marked with a parameter description (pd
element).
Use a syntax diagram as a container for all the syntax elements that make up a syntax definition representing the syntax of a statement from a computer language, or a command, function call or programming language statement.
Use a link list to group multiple when the order of the links should be preserved in the published form.
Use a link pool to group multiple links that have common characteristics.
Use long quote to indicate content quoted from another source. For short, inline
quotations use the q
(quote) element instead. Use the
href
attribute to store a URL to the source of the quotation.
Use screen to encode the textual representation of a computer screen or a window interface panel.
Use lines to encode a dialog, lists, text fragments, etc.
Use a message block to encode a multi-line message or multiple messages.
Provide an example that best illustrates or supports the current topic.
Use note to enter information, differentiated from the main text, which expands on or
calls attention to a particular point. The type
attribute can be used to specify the note type like caution
, important
, etc.
Provide hazard warning information.
A figure defines a display context with an optional title and diverse content, which usually includes an image element.
Use an image map to define regions on an image that will link to different targets.
Use simple table for tables with regular structure and without a caption.
Provide a description that should be used as alternate content or displayed as hover help.
Use a simple list for items containing short, phrase-like content.
Normal paragraph content.
Preformated content, preserves line breaks and spaces.
Unordered list.
Ordered list.
A DITA table that can encode any complex table structure.
Use draft comment for simple review and discussion of topic contents.
Use section div as a container for section content with no associated semantics.
Use link information for a descriptive paragraph following the list of links.
Use the metadata section to provide information about the content and subject of this topic such as category, audience, keywords and product information.
Use a generic DITA topic only if the content cannot be placed into one of the other more specialized topic types, like task, concept, reference, etc.
The topic title must clearly convey the content found in the topic.
Use the short description to expand the title, providing additional information about the content of the topic. It should always be composed of complete sentences and form a comprehensive thought.
A body division (bodydiv
element) is a grouping element
within the topic body, without any explicit semantics.
A task topic tells users how to accomplish a task. Try to limit a task topic to a single procedure.
Use an imperative verb form for the task title to help users distinguish between topics that tell how to complete the task and other topics that might only provide conceptual information about the task.
The short description of a task should describe in a couple of sentences why the reader is performing the task.
In the pre-requisites section describe the things that a user needs to know or do before starting the task.
The context section allows you to provide short background or high-level information about the task or its larger workflow. You can also mention here any warnings or general pitfalls with regard to the task.
Use a numbered step procedure (steps
) to describe the
actions that the user must perform in a specific order. Alternatively, use a
bulleted step list (steps-unordered
) to describe
actions that the user can perform in any order.
Each step describes an action that a user must follow to accomplish a task. Enter the
instructions as a direct command in the required cmd
element. A step can also optionally contain different information, sub-steps, step
example, choices or a step result.
Use a bulleted step list (steps-unordered
) to describe
actions that the user can perform in any order. Alternatively, use a numbered step
procedure (steps
) to describe the actions that the user
must perform in a specific order.
Each step describes an action that a user must follow to accomplish a task. Enter the
instructions as a direct command in the required cmd
element. A step can also optionally contain different information, sub-steps, step
example, choices or a step result.
Use the informal steps section to describe procedural task information that would not normally be described as steps.
Use the step section to provide expository text before the step element.
Use choices to inform the user to choose one of several actions while performing the step of a task.
Use a choice table provides to provide a series of optional choices.
Use the info element to provide additional information about the step.
Use tutorial information to provide additional information that is useful when the task is part of a tutorial.
Provide an example to illustrate this step of the task.
Use sub-steps to break a step down into a series of separate actions. This should be used only if necessary and if you need to use more than one level of sub-step nesting, you should probably rewrite the task to simplify it.
Use the step result to describe the expected outcome of the current step.
Use the result section to describe the expected outcome of the task as a whole.
If needed, add a sentence about the next task that the reader must perform to complete the overall workflow, and if possible, provide a link to the relevant topic.
Use the concept topic to provide overview and background information that helps end users understand essential information about a product, interface, task, etc. A concept topic typically answers a What is... question.
Use noun phrases for the concept title and try to place important words at the beginning to draw the users attention.
When writing short descriptions for concepts, try to include a summary of the main point of the content and tell the user why this information is important to understand.
A concept body division (conbodydiv
element) is a
grouping element within the concept body, without any explicit semantics.
Use a reference topic to provide "look-up" information that end users might need to refer to. A reference topic may answer questions like How Much..., How Many..., or What Form....
Use noun phrases for the reference title and try to include the name of the referenced information.
When writing short descriptions for references, try to describe what the reference item does, what it is, what it is used for and what specific type of information is provided in this topic for each referenced item.
A reference body division (refbodydiv
element) is a
grouping element within the reference body, without any explicit semantics.
Use the reference syntax section for syntax or signature content.
Use properties table to give a list of properties for the subject of the current topic. Each property can include the type, value, and a description.
Use a glossary group as a container for multiple glossary entries.
Use a glossary entry to define a single sense of a glossary term. If the same term has multiple senses, create a separate glossary entry for each sense.
Use the scope note as a clarification of the subject designated by the glossary term, such as examples of included or excluded companies or products.
Use the glossary alternative to provide a variant term the same meaning as the defined term.
Use the preliminary-requirements section to document things the user needs to know or
do before starting the current task. This is similar to prereq
but contains a more descriptive content model.
Use the closing requirements section to describe steps or tasks that the user should
do after the successful completion of the current task. This is similar to postreq
but contains a more descriptive content
model.
Use the required conditions to provide all required conditions that have to be fulfilled for performing a task.
Use the required personnel section to specify information on the personnel required for the task.
Use the support equipment list to provide the required support equipment for the task.
Use supplies to list any supplies required for the task.
Use the spares lists to provide the spare parts required for a task.
Use the safety session to list any safety condition that has to be taken in account for the task.
A trobleshooting topic tells users how to apply corrective action to solve a problem. It begins with a description of the condition the user may want to correct followed by cause-remedy pairs that represent potential solutions.
Expand the title by providing additional information about the problem this topic provides solutions for.
Describe the state that the troubleshooting topic is intended to remedy.
Describe a potential solution to solve the problem.
A solution contains cause and remedy information. The cause might be omitted if it is implicit or if the remedy is not associated with a cause. The remedy might be omitted if there is no known remedy for the cause.
Describe briefly a potential source of the problem that this troubleshooting topic addresses.
Specify steps that should be followed in order to solve the problem.
Identify the party who is responsible for performing the remedy procedure.


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|
The
Access/ASP/SQL Server Users Group
Wednesday, Dec 20 2000, 5:45 pm
Attention all User Group Attendees!!
Microsoft are wanting to
get YOUR feedback on the Sydney User Group and are conducting a survey through
DATA COM.
Your support is greatly
appreciated, it is IMPORTANT that you
fill in this feedback form.
FYI - if you don't know
some of the answers on the form use these: Number of members: 100-500
Description: Developer Which Microsoft products and/or programs is your group
most interested in: Developer Tools/MSDN
This month - Visual Studio.Net
Visual Studio.Net
is the next generation
of development tools from Microsoft, replacing Visual Basic and Visual
Interdev. It will reduce the number of situations where Access will be the
chosen developer tool.
This session by Stephen
Jeffries from Microsoft and
Adam Cogan will provide an overview of the Microsoft .NET Platform, and
services, including an overview of the Common Language Runtime, and .NET Base
Services. We will also have a look at Visual Studio .NET for building a Web
Enabled Application, using ASP.Net, C# (C Sharp), and Visual Basic.NET. Adam
says that the example will give you a good idea of what a web service is and
how to build one.
If you think you are
going to be coming please
let us know
|


You can import media anywhere you see an + Add Media button
or icon (
Imported media files are copied to the project's media collection, so it is safe to move or delete the originals. If the project already has a file of the same name, it will be overwritten.
You can access the Media Manager from the Project Menu
(
On the left of the Media Manager you will see a list of all the media files in the project. Any files that have been copied to the project but haven't been assigned to cues will be listed under Unassigned Media, while all the files assigned to cues are listed under Assigned Media.
If either list has no corresponding media files, it will not be shown.
When you select a media file on the left, on the right will appear a details pane with additional information about the selected file, and an audio player where you can preview the track.
Below the preview player will be a list of all the cues this media file
is assigned to (if any), with the name of the cue and the page/section
in which it appears. You can delete a cue by clicking on the delete icon
(
To create a new cue from the selected media file, click Create Cue.
If no cues are assigned to this media file, the Delete Media button will remove this media file from the project. Deleting the media file will reduce the disk size of your project but cannot be undone, so you'll need the original file if you want to add it back later.


HELLO,
I'M
EESHAAN
this website is currently under construction,
but here's where you can find me in the meantime:


 I love to create attractive HTML designs, I find those challenging but I also hate those pesky little CSS issues.
- The obvious: HTML, CSS & JavaScript.
- UI: Bootstrap, Bulma, Tailwind, Materialize.
- JavaScript: Alpine, VueJS, React.


@(context: PageContext)(implicit request: play.api.mvc.Request[Any], assets: AssetsFinder)
@common.main(context) {
@widget.weather(context)
@if(context.isWithingsEnabled) {
@widget.profile(user)
Yearly Activities
@widget.ajaxsplinechart("yearlyChart", "Yearly Heatmap", user.units().distanceLabel, 2, "/api/athletes/statistics/yearly/heatmap", 400)
@widget.ajaxbarchart("ytdDistance", "Year To Date Distance", user.units().distanceLabel, "/api/athletes/statistics/ytd/distance", 400)
@widget.ajaxsplinechart("yearlyDistance", "Yearly Distance", user.units().distanceLabel, 100, "/api/athletes/statistics/yearly/distance", 400)
@widget.ajaxbarchart("ytdElevation", "Year To Date Elevation", user.units().elevationLabel, "/api/athletes/statistics/ytd/elevation", 400)
@widget.ajaxsplinechart("yearlyElevation", "Yearly Elevation", user.units().elevationLabel, 100, "/api/athletes/statistics/yearly/elevation", 400)
@widget.heatmap("distanceHistogram", "Activity Distribution for Distance", "/api/athletes/statistics/histogram/distance", 250)
@widget.heatmap("elevationHistogram", "Activity Distribution for Elevation", "/api/athletes/statistics/histogram/elevation", 250)
@widget.activities("top10Distance", "Longest Activities", "/api/athletes/statistics/top/distance")
@widget.activities("top10Elevation", "Most Elevation", "/api/athletes/statistics/top/elevation")
}
@if(context.account.isEmpty) {
Login with your Strava account, it will able you to see various statistics of your activities
such as year to date progress, yearly achievements, daily heatmap based on distance and elevation
and much more!
See a few sample statistics.
@widget.ajaxbarchart("ytdDemoDistance", "YTD Distance (Sample)", "km", "/api/demo/statistics/ytd/distance", 250)
@widget.ajaxsplinechart("yearlyDemoElevation", "Yearly Elevation (Sample)", "m", 100, "/api/demo/statistics/yearly/elevation", 250)
@widget.wordcloud("/api/demo/wordcloud", 175)
Latest Activities (Sample)
@widget.calendar("km", "/api/demo/statistics/daily/distance", 8)
@widget.heatmap("distanceHistogram", "Distance Distribution (Sample)", "/api/demo/statistics/histogram/distance", 180)
@widget.heatmap("elevationHistogram", "Elevation Distribution (Sample)", "/api/demo/statistics/histogram/elevation", 180)


Go to the source code of this file.
◆ CIPHERCPPDLL_API
| #define CIPHERCPPDLL_API __declspec(dllimport) |
◆ decryptCaesar()
DLL function decrypt Caesar sentence1 - orginal sentence to decrypt key1 - shift buf - output (here is decrypted sentence)
Decrypt Caesar Cipher
◆ decryptVigenere()
| CIPHERCPPDLL_API void decryptVigenere |
( |
char * |
sentence1, |
|
|
char * |
keyword1, |
|
|
char * |
buf |
|
) |
| |
DLL function decrypt Vigenere sentence1 - orginal sentence to encrypt keyword1 - alphabetic password buf - output (here is decrypted sentence)
Decrypt Vigenere Cipher
◆ encryptCaesar()
DLL function encrypt Caesar sentence1 - orginal sentence to encrypt key1 - shift buf - output (here is encrypted sentence)
Encrypt Caesar Cipher
◆ encryptVigenere()
| CIPHERCPPDLL_API void encryptVigenere |
( |
char * |
sentence1, |
|
|
char * |
keyword1, |
|
|
char * |
buf |
|
) |
| |
DLL function encrypt Vigenere sentence1 - orginal sentence to encrypt keyword1 - alphabetic password buf - output (here is encrypted sentence)
Encrypt Vigenere Cipher


Almustafa dk @sul
| IP | MAC Address | Action | Change On | Property | Date |
|---|---|---|---|---|---|
| <IP_ADDRESS> | fe80::a865:29cf:1827:4e23%17 | Update Data | on Users ID :1 | { "before":{ "userName":"fahmi" }, "after":{ "userName":"Ajo" }} | 1970-01-18 20 :29 57 |
| IP | Action | Datetime |
|---|---|---|
| <IP_ADDRESS> | Login | 1970-01-18 20 :29 57 |
| <IP_ADDRESS> | Logout | 1970-01-18 20 :29 57 |
This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.
This card has supporting text below as a natural lead-in to additional content.
Last updated 3 mins ago
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat.
This card has supporting text below as a natural lead-in to additional content.
Last updated 3 mins ago
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.
This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.
Last updated 3 mins ago


An attorney for the alleged victim notified Catholic officials in New Jersey this week that he is preparing a lawsuit on behalf of a client who says he was molested by Brooklyn Bishop Nicholas DiMarzio in the 1970s, when DiMarzio was a priest in Jersey City. In a letter, lawyer Mitchell Garabedian says 56-year-old Mark Matzek alleges he was repeatedly abused by DiMarzio when he was an altar boy.
DiMarzio says there is no truth to the accusation.
Buffalo Bishop Joseph Malone has come under fire for his handling of a clergy abuse scandal that has roiled the diocese.
Copyright 2019 Associated Press. All rights reserved.


window.addEventListener('beforeunload', function (e) {
// Cancel the event
e.preventDefault();
// Chrome requires returnValue to be set
e.returnValue = '';
});
componentDidMount() {
window.addEventListener("beforeunload", this.onBeforeUnload);
}
componentWillUnmount() {
window.removeEventListener("beforeunload", this.onBeforeUnload);
}
onBeforeUnload = event => {
event.preventDefault();
event.returnValue = "";
});
function onBeforeUnload = event => {
const { selectedCollection } = this.state;
/* If the user has selected a collection,
* she likely intends to fill in the form.
* A (browser implemented) alert will
* confirm if the user really wants to leave
*/
if (selectedCollection) {
event.preventDefault();
event.returnValue = "";
}
});
Browser will confirm if you want to leave if you've selected a collection
So some links don't trigger alerts
But React Router has you covered
import React, { PureComponent } from 'react';
import { Prompt } from "react-router";
class Example extends PureComponent {
render() {
<div>
<Prompt>
when={!!this.state.selectedCollection}
message="Changes that you made may not be saved"
/>
Rest of the component
</div>
}
}
Any success navigation will trigger the Prompt as well
Unless we control the boolean very carefully


The ICU version number, as a string.
Returns the name of the default text encoding of the process/application.
Convert a Lua string, text, from one encoding (current_encoding) to another (new_encoding).
If either of the encoding parameters are passed as nil, the default encoding is used for that end of the conversion.
"Ustrings" are an alternative type of text string data to standard Lua strings. Internally, a ustring is an array of ICU UChars, stored in a "userdata" structure. The icu.ustring submodule provides ways to convert ustrings to and from standard Lua strings, and to do the same things on a ustring that you can on a Lua string.
Since ustrings and Lua strings are fundamentally different types, if you try to compare a ustring to a Lua string using the == equality operator, the result will always be false, and if you try to compare them using the less-than/greater-than operators, Lua will throw an error. Ustrings can only be compared to other ustrings.
Using icu.ustring(...) as a function is the same as calling icu.ustring.decode(...). A recommended convention for this is:
local U = require 'icu.ustring' local ustr = U"Hello World!"
This is the full list of functions provided by icu.ustring. They can also be called as methods on a ustring instance. Functions in bold are intended to be directly equivalent to a function in the standard string library.
Create a new ustring containing the text encoded in Lua string s, using the encoding specified by encoding (as a Lua string, for example 'windows-1252') or UTF-8 by default.
Encode the text in the given ustring ustr into a Lua string, using the encoding specified by encoding or UTF-8 by default.
Note: Calling the standard Lua function tostring on a ustring will internally call encode with no encoding specified, so the result will be UTF-8 encoded. Also, print uses tostring internally, so printing a ustring will write it UTF-8 encoded to the output.
Returns true if ustring a is less than b in a codepoint-wise comparison, false otherwise.
You can also use a < b instead.
Returns true if ustring a is less than or equal to b in a codepoint-wise comparison, false otherwise.
You can also use a <= b instead.
Similar to icu.ustring.decode, except that unescape does its own run-time backslash-escaping, and supports escapes that Lua normally doesn't such as \x3F and \u0030 for specifying characters using a hexadecimal value. The rest of the text is expected to be encoded by the default codepage.
Returns true if the given value v is a ustring, false otherwise. (This function is necessary as the Lua function type(v) will always return 'userdata' for a ustring.)
The ustring equivalent to string.byte (renamed to be more correct).
The ustring equivalent to string.char.
The ustring equivalent to string.len. Using the length operator # on a ustring will also work.
The ustring equivalent to string.rep.
The ustring equivalent to string.sub.
The ustring equivalent to string.reverse.
The ustring equivalent to string.lower.
The ustring equivalent to string.upper.
The ustring equivalent to string.match.
The character classes used when matching are, by default, still only the ASCII set. For example, %a is still only equivalent to [A-Za-z]. To use the full Unicode-set character classes, there is a new syntax specific to ICU4Lua. Add an exclamation mark ! after %, in this example %!a to match the set of all "letter" characters defined in Unicode.
The ustring equivalent to string.find, with the difference to character classes described in the documentation for icu.ustring.match.
The ustring equivalent to string.gmatch, with the difference to character classes described in the documentation for icu.ustring.match.
The ustring equivalent to string.gsub, with the difference to character classes described in the documentation for icu.ustring.match.
The ustring equivalent to string.format.
A constant value holding the zero-length ustring.
If switching to using ustrings seems like a radical change and you'd rather stay in the domain of standard Lua strings, you might find the icu.utf8 submodule useful. It is like a copy of all of the functions in icu.ustring where every Lua string input parameter is decoded as UTF-8 into a ustring, and every ustring return value is encoded into a UTF-8 Lua string.
As in icu.ustring, functions in bold are intended to be directly equivalent to a function in the standard string library.
Create a UTF-8 string using run-time backslash-escaping. This includes support for escapes that Lua normally doesn't allow, such as \x3F and \u0030 for specifying characters using a hexadecimal value. The rest of the text is expected to be encoded by the default codepage.
Returns true if UTF-8 encoded Lua string a is less than b in a codepoint-wise comparison, false otherwise.
You can use this function as the second parameter of the standard Lua function table.sort to sort an array of UTF-8 encoded strings.
(There's no equivalent function for a >= b - use not icu.utf8.lessthan(a,b) instead.)
Returns true if UTF-8 string a is less than or equal to b in a codepoint-wise comparison, false otherwise.
(There's no equivalent function for a > b - use not icu.utf8.lessorequal(a,b) instead.)
The UTF-8 equivalent to string.byte (renamed to be more correct).
The UTF-8 equivalent to string.char.
The UTF-8 equivalent to string.len. Using the length operator # on a utf8 will also work.
The UTF-8 equivalent to string.rep.
The UTF-8 equivalent to string.sub.
The UTF-8 equivalent to string.reverse.
The UTF-8 equivalent to string.lower.
The UTF-8 equivalent to string.upper.
The UTF-8 equivalent to string.match, with the difference to character classes described in the documentation for icu.ustring.match.
The UTF-8 equivalent to string.find, with the difference to character classes described in the documentation for icu.ustring.match.
The UTF-8 equivalent to string.gmatch, with the difference to character classes described in the documentation for icu.ustring.match.
The UTF-8 equivalent to string.gsub, with the difference to character classes described in the documentation for icu.ustring.match.
The UTF-8 equivalent to string.format.
A string containing the (so-called) UTF-8 byte order mark.
Open a collator for the given locale, which must be given as a Lua string, not a ustring. If the collator could not be opened, returns nil and an error message.
Note: You can also call icu.collator(...) instead of icu.collator.open(...)
Either sets the strength of the collator, or returns the current strength setting if no new value is given. (If a new value is set, the collator itself is returned.)
Valid strength values are:
Returns true if ustring a is equal to ustring b according to the collator col, false otherwise.
Returns true if ustring a is less than ustring b according to the collator col, false otherwise.
Returns true if ustring a is less than or equal to ustring b according to the collator col, false otherwise.
For details on the pattern syntax supported by ICU's regular expressions engine, see the ICU User Guide page at http://userguide.icu-project.org/strings/regexp/.
There are two "levels" of functions available in icu.regex:
A high-level set of "full" operations that people who have used regular expressions are likely to be familiar with - find the first match if any (match), iterate through all matches (gmatch), replace all matches (replace) and split on each match (split).
For these functions, the regex object represents only a compiled pattern.
A low-level set of "atomic" operations. When using these functions, the regex object does not only represent a compiled pattern - it also encapsulates the state of the matching engine:
The low-level matching operations themselves (matches, lookingat, find) only test for a single match at a time, and only return true or false to say whether they succeeded.
These functions are marked as bold in the function list below:
Creates a new compiled regex pattern object. pattern can be a ustring or a Lua string. If a Lua string, it is expected to be encoded in the default codepage.
flags can be one of two things:
Note: You can also call icu.regex(...) as an alternative to icu.regex.compile(...)
Find the first match, or false if there is no match to be found, optionally starting the search at the given start_index (one-based).
For a successful result the returned value is a match object that contains these named fields:
The match object will also have an array component 1 to n, where n is the number of captures in the pattern. These entries will each be either the boolean value false (if the capture is an optional one and was not used) or an object with the same named fields as the parent match object as described above. The 0th element of the match object will always be the match object itself.
Returns an iterator over all of the matches found for a compiled regular expression, designed to be used in a for loop, e.g.:
for match in icu.regex.gmatch(myRegex, inputText) do -- the "match" object is the same as described in the documentation for icu.regex.match end
Find all places where the given regular expression matches in text, replace them with a new value, and return the result.
text must be a ustring, and replacement must be one of the following:
Returns an array of the substrings found by splitting ustring text using the given regex, with an optional maximum number of splits.
Returns true if the value v is a regex object, false otherwise.
Returns a copy of s (which must be either a ustring or a Lua string) with all "special" regex characters (like ., ^, $ etc.) prepended with a backslash.
Returns two values - the original pattern of the regex as a ustring, and the flags that it was compiled with, as a number.
Create a clone of regex. It only clones the compiled pattern, and not any stateful matching information like the target text. It is like a faster, more efficient alternative to icu.regex.compile(icu.regex.decompile(regex)).
Get or set the target text. If a new_value is passed (which must be a ustring) it is set, and the function returns the regex object. If there is no new_value passed, the current text is returned (which might be nil if it was never set).
Get or set the region bounds on the target text. This is a pair of indices that describe where matching should start and stop in an atomic matching operation (unless they are overridden by supplying a start index).
The target text must have been specified using icu.regex.text before calling this function. If new_start and new_stop are specified, they are set as the new region. If not, the current bounds are returned. The indices are one-based and inclusive.
Get or set whether to use transparent bounds. If enable is specified (it must be a boolean value), this is used to set the property, and the regex object is returned. If not, the current setting is returned as a boolean value.
Transparent bounds alter the behaviour of "lookahead" and "lookbehind" captures when the region bounds have been set (see icu.regex.bounds). If the bounds are "transparent", this means that these captures can "look" past the bounds.
By default, transparent bounds are disabled.
Get or set whether to use anchoring bounds. If enable is specified (it must be a boolean value), this is used to set the property, and the regex object is returned. If not, the current setting is returned as a boolean value.
Anchoring bounds alter the behaviour of the ^ and $ anchors. If enabled, the anchors will match at the start and end of the region bounds, wherever they are in the target text. If disabled, they will only match at the start and end of the entire text (or each line, if the relevant flag has been set).
By default, anchoring bounds are enabled.
Atomic match operation that attempts to match the entire matchable region of the target text (which must have been previously set using icu.regex.text) against the whole regex pattern from beginning to end (regardless of anchors in the pattern).
This function will only return true or false to indicate whether the match was successful. Use icu.regex.groupcount, icu.regex.value and icu.regex.range to extract information about the "current" successful match.
If start_index is specified then the matchable region is from this index (one-based) to the end of the whole text, otherwise the matching region will be the one specified by icu.regex.bounds (by default the entire text).
Atomic match operation that attempts to match from the first character of the entire matchable region of the target text (which must have been previously set using icu.regex.text) against the whole regex pattern from beginning to end.
This function will only return true or false to indicate whether the match was successful. Use icu.regex.groupcount, icu.regex.value and icu.regex.range to extract information about the "current" successful match.
If start_index is specified then the matchable region is from this index (one-based) to the end of the whole text, otherwise the matching region will be the one specified by icu.regex.bounds (by default the entire text).
If find has already been called at least once on this regex and successfully found a match, the next time it is called it will start from after the previous match. Attempts to match from the first character of the entire matchable region of the target text (which must have been previously set using icu.regex.text) against the whole regex pattern from beginning to end.
This function will only return true or false to indicate whether the match was successful. Use icu.regex.groupcount, icu.regex.value and icu.regex.range to extract information about the "current" successful match.
If start_index is specified then the matchable region is from this index (one-based) to the end of the whole text, otherwise the matching region will be the one specified by icu.regex.bounds (by default the entire text).
Open a StringPrep profile from a data file. path and filename must be Lua strings. Returns the loaded profile object, or nil and an error message on failure.
Open a StringPrep profile from a predefined profile type. type can be one of:
Prepare the given ustring ustr against the StringPrep profile, profile. Returns a new ustring, or nil and an error message on failure.
Implementation of the ToASCII operation as defined in RFC 3490. label is a ustring that holds a single label (e.g. "www", "lua" or "org") rather than a full domain name. Returns either a new ustring or nil and an error.
options, if specified, should be some combination of these flags:
Combine them with the + operator. The default is neither - i.e. return with an error on unassigned codepoints, and do not check for STD3 violations.
Implementation of the ToUnicode operation as defined in RFC 3490. label is a ustring that holds a single label (e.g. "www", "lua" or "org") rather than a full domain name.
See icu.idna.toascii for details on the flags for options.
Convenience function. An equivalent to icu.idna.toascii that operates on a full domain_name (e.g. "www.lua.org") instead of individual labels.
See icu.idna.toascii for details on the flags for options.
Convenience function. An equivalent to icu.idna.tounicode that operates on a full domain_name (e.g. "www.lua.org") instead of individual labels.
See icu.idna.toascii for details on the flags for options.
Return true if ustrings a and b are equivalent as IDN strings, false otherwise.
Return true if ustring a is less than ustring b as IDN strings, false otherwise.
Return true if ustring a is less than or equal to ustring b as IDN strings, false otherwise.
Open a file for reading/writing according to the mode parameter, which has the same meaning as the mode parameter of io.open() except that the "b" binary mode qualifier has no meaning and should not be used. The encoding and locale to use will be the current defaults if not supplied as parameters.
Returns a new ufile object. (The rest of the icu.ufile functions can also be called as methods on this object.)
Set the encoding to use if new_encoding is specified, otherwise return the current encoding.
Set the locale to use if new_locale is specified, otherwise return the current locale.
The equivalent to file:read(...) on a standard Lua file, with the same options available:
The equivalent to file:write(...) on a standard Lua file, except that the values to write must all be ustrings.
Create a for-loop iterator over lines of text from the given ufile, equivalent to file:lines().
Unlike standard Lua files which allow full seeking operations, ufiles can only have the cursor position returned to the beginning of the file by calling this function.
Save any written data to the ufile.
Close the ufile. This will also occur automatically if the ufile object is garbage collected.
Return a normalized version of ustring ustr. If specified, mode must be one of the following values, passed as a Lua string:
Attempt to perform a quick check to determine whether ustring ustr is already normalized in the given mode (or the same default as icu.normalizer.normalize). This function will not return a boolean as it has three possible states to return, which are the Lua strings 'yes', 'no' and 'maybe' (when it cannot be determined by a quick check).
Perform a full normalization check on ustr, and return a definite true or false.
Where you have two ustrings that are already known to be normalized, and you want to concatenate them, the result may not be normalized. Re-normalizing the entire new string can be inefficient, especially compared to using this function which will normalize only where the two strings join.
When you want to compare two ustrings which have not been normalized but you want to compare them as if they had been, these functions can be a more efficient way than normalizing and then comparing them.


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We Found An Available Class. Here Is The Request Detailes:
Class's Code
Date
Beginning Time
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Email Of Applier
Accept
Decline


| DOSE: T+ 0:00 |
354 mg |
oral |
DXM |
(liquid) |
| T+ 3:00 |
177 mg |
oral |
DXM |
(liquid) |
| T+ 3:25 |
88.5 mg |
oral |
DXM |
(liquid) |
| T+ 7:00 |
354 mg |
oral |
DXM |
(liquid) |
Holy sweet Jesus do I feel awesome after last night. I feel like a whole person. I feel for the first time as if I am truly conscious. I no longer have that 'Is this all there is to life?' feeling of doom hanging over my head, for I have reached the fourth plateau last night and had a full blown trip. Suddenly everything is clear to me, I now understand my place in the world and the universe and what I must do to become a better person, inside and out.
I have been interested in trying LSD for years, after reading a lot about it online (and after going through the works of Leary many times). However, it seems to be non-existent in my area. I wanted to explore myself with psychedelics, I wanted to grasp a better understanding of myself. But there were no psychedelics to be found. Nobody has any no matter how much I looked. I could score heroin (eww) with no problems, but God help you if you wanted to have the 60's experience.
After coming down with the cold from hell last week I found myself in my local supermarket's pharmacy staring at a very long isle of cold and flu medications. I don't know why, but a little flash of memory went off in my head and I remembered what I read about DXM. Now, prior to this I had absolutely no interest in doing any harder drugs. I knew alcohol rather well (revolting), I smoked pot rarely (awesome), and that's it. Other than experimenting with LSD someday the thought of doing anything harder sickened and scared me. I've seen too many people messed up on that stuff. Keep me away from it.
I was looking at the cough medicines and started looking at the boxes for the drug name that I hoped would sound familiar. I picked up the Robitussin and saw 'Dextromethophan HBr, USP'. Hmm.... that sounds about right. Of course, I'm not the type that buys name brands. Give me the store brand, all you get extra with the name brands is advertising. So I picked up a bottle of the cheap knockoff and bought that.
I was very nervous about the prospect of taking this for obvious reasons. I wasn't helped by the fact that my bottle had 100mg/5mL of Guaifensin, which reportedly caused projectile vomiting in high doses. From my experiences with alcohol I very well know what vomiting feels like, and I wanted to avoid that. Due to this I drank half the bottle and waited.
I began playing Super Metroid 3 to pass the time until it kicks in. Metroid 3 is an awesome game to play when you're on anything, and has been a favorite of mine to play while stoned. After about 45 minutes I didn't feel anything and wondered if I took enough for it to affect me. So I downed the rest of the bottle, and had a cig.
While smoking I felt... different. I wasn't messed up, I wasn't really on anything, I just felt different. Things looked different, things felt different. It wasn't a good different, it wasn't a bad different, it just simply was. As I went inside and continued to play Metroid things got more different. I wasn't really high, things just got different for awhile and after a few hours I came down, no big deal.
I will note that I had a very upset stomach from the experience. It wasn't enough to make me vomit, but it was enough for me to feel sick. I wrote it off as that Gal stuff, and not the actual DXM.
I felt that was a total letdown the next day. All those wonderful trip reports and all I did was feel different? The hell is this, this isn't a good drug.  Give me a fat joint, at least that's interesting.
Yesterday found me shopping for groceries. I was looking for my shampoo in the health department when I realized I was standing right in front of the cough syrups again. After a very quick mental debate I decided to go for it. I looked at the Robitussin bottles and found exactly what I was looking for - Robitussin Maximum Strength Cough, all DXM and none of that extra crap that makes me feel gross. I grabbed three 118mL bottles and tossed it in my cart. It was my intention to drink one bottle that night and have two extra bottles for later. When I went through the check out line the girl looked at me oddly.  'Whatever floats your boat, man', she said.
And with that I was on my way home, and on my way to the mental vacation of a lifetime.
After putting away the groceries I popped a hamburger pizza in the oven and got online. I was looking for something to kill twenty minutes while the pizza cooked and I hit overclocked remix. I downloaded a MegaMan 2 remix.
I take special note of this song because it is very important to this trip report.
 I was ready to understand what DXM was about, I had a totally open mind. Bottoms up, down in three large gulps. Tasted like crap, but a lot less harsh than vodka. Followed it up with a Dr Pepper chaser, and continued reading. Took the pizza out of the oven, got two slices for myself.
Okay, the flow of what all went on is a bit broken above so I'll restate what happened in linear time. I'm very much into the flow of writing this so things tend to get a bit jumbled, please forgive me. Tossed pizza in the oven, got online, began downloading that song, chugged the robo, hit a website, and after 20 minutes I got the pizza out of the oven. So by the time I began eating I could just barely feel the effects of the DXM kicking in, increasing as I continued eating.
As I was eating I found it increasingly more difficult to finish the first slice of pizza. I don't know what it was exactly what started to feel so revolting about it. Maybe it was the texture of the food and the meat on it, maybe it was the grease, I don't know. But I finally forced myself to down the slice, leaving me one more. By now I could feel the DXM really kicking in, I was a little higher than I was the first time I took it.
Suddenly I had the most intense urge to play Metroid 3. Man, I love that game to death nearly ten years after it was released.  So I got offline, loaded ZSNES, and started yet another game from the beginning. I played for a good half hour to forty-five minutes and decided to go for a cigarette.
When I stood up from my computer chair my legs wouldn't work. Well, they would but my body was like... gone. The physics of the world felt totally different, suddenly I was light as a feather and made of Styrofoam.  I managed to get outside and light my cigarette.
As I paced around I was amazed at how the world felt. It was like the entire world was made up of scenes from photographs. As an artist I would describe it as having the right side of your brain turned on full force. There was no linear space, there was only figures, shapes, and forms comprising the world into a series of scenes that one would interact with. All the while I felt as if some invisible force was gently pulling me upwards. I wasn't floating, I was being pulled. I wasn't light, I was being lifted.
Please forgive me, but that really is the best way I can describe it. Explaining alternative modes of consciousness with mere words is extremely difficult. Words are limiting, as there are many things in and outside of this world for which there are no words.
Either way, what I was experiencing was the second plateau.
I returned to my room and sat down to continue playing my game. I looked at the pizza, deciding if I should finish the second slice. The thought revolted me. I mean, consume the flesh of another creature? How barbaric! I shoved the plate to the side, out of view. Didn't want to think about it. Putting the carcass of another living creature into my own body? That's so wrong. Disgusting.
I played the game for probably another twenty minutes. I'm not for sure on the actual time as it was around this time that linear time began to lose it's meaning. Finally I got tired of the game and turned it off to go for a cigarette. All the while I was feeling more spiritual, more empathetic to everything. And I mean everything - my dog, that tree, the floor, the walls, the grass, the air, everything.  Things just started being. I was a part of the greater whole, just another part of this massive sea of energy we call the earth and existence.
When I returned I loaded Winamp and played Dr. Wiley's Wedding. I just sat there in my chair for what seemed like ages, listening to the most beautiful piano and flute music coming out of my speakers.  It was godlike, and I mean that in every sense of the word. I am not a religious man, but I do believe in a higher power. Somewhere, somehow, there is a force out there that I can only describe as a higher power. I have seen too much to believe otherwise. And that song was the most mind shattering representation of that higher power I have ever seen. So serene, so loving... it wrapped itself around my being like a blanket and I could feel myself opening up in ways I never knew I existed. I felt the energy of the world pouring into my head and through seven points in my body. For the briefest moment I understood Nirvana.
People experienced in metaphysics will understand all the implications of what I have just written. However, I choose not to go into it, for I do not want this trip report to turn into some hippie tree hugging love fest or whatnot. I will simply give my experiences of the night before and leave it at that.
Might I also note that sometime between me deciding not to finish my pizza and the Zen like state I drank the second bottle. I downed half of it, thinking that while this high was nice I wasn't feeling it enough. (My mistake, it was still entering my system). As I got higher and higher into the second plateau I finished off another 1/4 bottle... and then the rest. At the Zen like state I was experiencing the extreme upper limits of the second plateau, moving into the third. I wish I could give exact times on dosages, but as I said before linear time had no meaning after a certain point.
So I put Dr. Wiley's Wedding on an infinite loop and got online. I browsed some site. Went for another cigarette and I hit the third plateau full force. I was experiencing the same trip I wanted to find via LSD. To continue documenting my nice little mental vacation I feel it necessary to explain what a trip is like, for those who don't know and are curious.
I feel like I am totally sober. I can not state this enough, I feel like I am 100% sober in every way, shape, and form. But your mind's gone. Bye bye, so long, the doctor is out, Elvis has left the building. The border between the real and the unreal are simply totally and completely -GONE-. Suddenly the grandest concepts become common knowledge. It's like my brain is directly connected to God himself and Ií, downloading the greatest secrets and truths about the universe, life, and reality. But Iím totally sober. Suddenly I am one with everything, I understand the grand order of things and my small part of it.
To illustrate this, when I was talking to a friend over IMs later I was going on about how surreal it is that we humans can communicate thought using speech and written language. That it is simply amazing that we can communicate the experiences of our different consciousnesses with each other even though we still have a mental wall blocking the direct sharing of pure thought with one and another. I found this to be absolutely enthralling until I moved on to the realization that modern religion is the direct result of our ancestors 7,000 years ago growing and using psychedelic plants to understand their greater place in the universe.
I understood that religion as we know it - Christianity, Islam, and so forth is but a knockoff (descendant?) of the original religions of which we now have little record of. Thus you have these religions which look in the right general direction but is bastardized by mankind's want for power over his brothers. While you still have many religions that emphasize the search and understanding of Nirvana through various means, in the end the search for a greater meaning can be reached in daily life only through rigorous self-improvement.
That is what a trip is like. Needless to say, I was having a lot of fun.
During this trip I remembered ex vice president Dan Quayle's famous quote - 'A mind is a terrible thing to lose', mucking up the anti-drug line 'A mind is a terrible thing to waste'. I loved it! But no, a mind is not a terrible thing to lose. Indeed, a mind is a wonderful thing to lose!
For several hours I just sat online talking to friends who would be friendly to the fact I was tripping while listening to Wiley's Wedding looped over and over. I never felt such empathy for the world as I did that night, everything was one and I respected everything as having it's own place in existence, it's own place in meaning.
Also I would like to note yet again the fact that time lost it's meaning. There is no other way to describe it - a minute of real time felt like hours. I'd do ten thousand different things only to see that two minutes have passed.
Now, I'm a smoker. I have roughly one cigarette every forty-five minutes. I bought a pack at about 4:30 that afternoon. By 9:30 I had two left, and I thought that I had one about once an hour. That is how slowly linear time passed in my relative viewpoint.
But time did pass, and I began coming down. The trip lasted long into the coming down phase, but by 11:30 it was but a wonderful memory.
I missed the trip, and decided to drink the 3rd bottle. Redose, reload, retrip. Down in three large gulps, just like the first bottle. As I sat there mucking around online I reached the point where I was basically sober, only with that 'coming down' hangover thing going on. I was impatiently waiting for the DMX to hit me again. I wanted to hit the 3rd plateau, I wanted to stay there for as long as possible. It was just wonderful, so wonderful.
Finally, I felt the buzz kicking in again. Woot. Waited for at least twenty minutes for it to kick in full force but it wouldn't. I figured that was about all I was going to experience so I turned off the lights and went to bed. Left my monitor on, which is in my bedroom. Thus the room was dark but not totally blacked out. Curled up nice and snug in my sheets and thought to myself 'Yeah, I'll barely hit the second plateau with this and that will be that.'
I tried to go to sleep but I couldn't. Sure enough, I hit the second plateau. Then I hit the high levels of the second plateau and walked casually into the third, tripping again. At this point I didn't care about how high I got, I just enjoyed listening to my computer playing it's full playlist while staring at a wall scroll on the wall, relaxing. And I kept tripping harder and harder, and the next thing I knew I was having a full blown visual trip. I hit the fourth plateau.
It was phenomenal, simply phenomenal. There are no words, I was simply floating in an endless ether of senses and experiences. I'd surrender to the visuals and they would melt around, bubble up, envelop my spirit, and flash around in a kaleidoscope of pure color. When I tried to control it the visuals stopped. When I tried to force it to come harder they stopped. All I could do is lay there and surrender to them. That's all I really can say - all I did was lay there, listen to music, and surrender my existence. There was no fear, when I saw something I didn't want to get into I just denied it and moved on. Just floated around in the sea of existence, enjoying Nirvana. That's all there is to say.
I found Nirvana in a bottle of cough syrup and a video game music remix. Beat that.
This lasted for about twenty minutes of real time. I don't know how long it lasted in perceived time, for I simply 'was'. But soon they slowed down, faded away, and stopped. I was disappointed at this, but okay with it. Things were. That was. I surrendered to sleep.
I woke up with a hangover. It wasn't nearly as bad of a hangover as what I've had a few times with alcohol, but it was enough to let me know that I had a fun time last night from the very second you regained consciousness. And unlike an alcohol hangover, I didn't have any regrets about the previous night.  I didn't have any such thoughts this morning. I knew that my body was recovering from an intense spiritual trip the night before and I was fine with it.
While having my morning cigarette the dog next door was barking as usual. I was fine with it. I was hungover. I was fine with it. I was hungry. I was fine with it. Nothing was a big deal anymore. I felt peaceful, because I understand. That's the only way to describe it. I understand. I can go on for hours, but those two words sums it up perfectly. I understand my place in the universe, I understand life, I understand death, I understand.
In the past twelve hours that I've been awake it's like I'm finding myself in an entirely different existence. When I look around me I feel the vibrancy of every color, of every form. It seems like before last night I was seeing everything in black and white. Before I always had this feeling of 'is this all there is to life?' A perpetual cloud of doom and uncertainty of my very existence hung over my head. Not anymore, I now understand my place within it all. I feel so much more empathy. I've been laughing, enjoying each sensation and emotion as if I never felt it before.
I needed to have my cage rattled a bit. Shake the dust off those neurons. Make myself conscious for the first time in my life. Give meaning and worth to my life.
I feel alive.
I am not afraid anymore.
Experience Reports are the writings and opinions of the individual authors who submit them.
Some of the activities described are dangerous and/or illegal and none are recommended by Erowid.


Hi {{user}}. Here, you can share clips with your other devices.
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Portal
Proxy Mode
DIRECT
RELAY
RULE
Proxy Rules
Local Rules: (
Update
)
Black Rule Number:
0
White Rule Number:
0
Local Rules: (
Update
)
Black Rule Number:
0
White Rule Number:
0
Test Host:
Previous Test Result:
-
Server Control:
Reload Configurations


| Package | Description |
|---|---|
| net.co.java.entity | |
| net.co.java.packets | |
| net.co.java.server |
| Modifier and Type | Method and Description |
|---|---|
void |
Entity.jump(int x,
int y,
int direction,
IncomingPacket jumpPacket) |
void |
Entity.walk(int direction,
IncomingPacket walkPacket)
The walk method is called when an Entity moves.
|
| Constructor and Description |
|---|
Character_Creation_Packet(IncomingPacket ip) |
GeneralData(IncomingPacket ip)
Construct an GeneralData packet filled with data from
an Incoming packet
|
InteractPacket(IncomingPacket ip)
Construct a new
InteractPacket based on a IncomingPacket |
ItemUsage(IncomingPacket ip)
Create a new ItemUsage packet based on an Incomming packet
|
MessagePacket(IncomingPacket ip)
Construct a new Message packet based on a IncomingPacket
|
PacketWriter(IncomingPacket packet)
Create a new PacketWriter
|
| Modifier and Type | Method and Description |
|---|---|
abstract void |
ServerThread.handle(IncomingPacket packet)
Subclasses should override this method to
handle the incoming packets
|


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17
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salicifolium
(L.)
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PUERTO
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Hato
Tejas
mogote
near
convent.
Mature
forest
limestone
hills.
Elev.
c.
70-100
m.
Tree
(6m).
Purple
berries.
F.
Axelrod
2733
10
Aug
1991
I.
Vlez,
B.
Axelrod
Sapotaceae
BOTANICAL
GARDES,
y>I?.A
GZD
NEW
YORK
BOTANICAL
GARDEN
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Legend -
Level of confidence that token is an accurately-transcribed word
extremely low
very low
low
undetermined
medium
high
very high


Hi! This is an example page to showcase how the Angular2 parallax directive works. On the page are shown different examples of what the result is and what the configuration I used was in order to get the effect. Please refer to the README.md for more information on the installation of this directive plugin.
This is how it looks if you just add the "parallax" attribute onto an element, then give it a width, height, and background-image property in your .css file

*[parallax] { width: 700px; height: 300px; background-size: 100%; } #first-example { background-image: url('./assets/dawn-190055.jpg'); }
NOTE: Each of the examples are set up similarly as far as the styles go, so I'll leave you to decide on the styling.
If you want to modify the effect, you can pass in a config object (definition found in the .ts file) that has the properties you want to override.

Or define the config object in your component class and just pass the reference through the HTML. Cool thing about this is that then you could use the ParallaxConfig interface exported with the directive to type-check what you're sending it.
@Component({ . . . }) class AppComponent { parallaxConfig: ParallaxConfig = { parallaxInitVal: -300, parallaxRatio: .3 }; constructor() {} }
(preferred syntax)

 (alternative data-binding syntax)

If all you're doing is changing one or two things, you can also reference those specific attributes through HTML instead of a config object:

My preference is just use the config object, defined in HTML, though I've used the other strategies before, too. Remember that with either of the data-binding syntaxes, you need to make sure that it make sense from a JavaScript standpoint (e.g. strings are strings, numbers are numbers, variables are variables).
Suppose you want to track the scroll of a different element on the page that has a unique id (such as a scrolling route element on a separate component). You can pass in a scrollerId that is the unique id for that element you want to track the scrolling of. Now the div below isn't tracking the scrolling of the page, but of the element beneath it, moving the picture from left to right rather than right to left.
Bacon ipsum dolor amet tenderloin pork salami leberkas ham hock pork chop. Doner sirloin capicola brisket hamburger. Filet mignon flank jowl cow turkey ground round.  Tail brisket shoulder capicola doner meatball ham hock.
Rump tri-tip chicken shoulder ball tip bresaola jowl alcatra tongue bacon shank. Beef ribs bresaola frankfurter pork tri-tip strip steak pork belly spare ribs sausage cow.  Beef frankfurter sausage t-bone, ball tip landjaeger pastrami rump kevin doner. Beef ribs venison boudin turducken shoulder pastrami, t-bone pork loin short loin sirloin. Jerky pastrami capicola pork, chuck biltong cow t-bone tenderloin tail tri-tip shank prosciutto. Corned beef pork belly kevin, bresaola sausage filet mignon swine prosciutto capicola frankfurter ball tip.
Spare ribs salami pastrami fatback beef ribs shankle bacon tenderloin cow ham hock shoulder corned beef short loin short ribs. Ball tip cow strip steak, fatback turkey kevin boudin meatball venison. Sausage salami meatloaf ham hock, kevin ground round short loin shankle beef ribs kielbasa tongue porchetta tenderloin beef. Turducken tri-tip pork frankfurter, kevin ball tip chicken kielbasa. Turducken picanha pastrami ham hock jerky beef frankfurter brisket bacon ball tip cow sirloin.  CONTENT . . .

You could also specify the scrolling-watched element from the HTML via the ng2 special syntax of defining an element variable in the template. Just be mindful that the '#' does gets included, not on the config object, but on the element you're wanting to pass into the object.

 . . . CONTENT . . .

You also have the 'parallaxElement' option you can pass into the config object as well, if the element you're wanting the effect to apply to isn't the element you're putting the "parallax" attribute onto. Usually, you would put the "parallax" attribute straight onto the element you'd want the scrolling to modify, but the option is open to you. It'd be using the same syntax of "#" on the element you want it to apply to, however you can't currently pass in the string id of the parallax element. That feature will be added if people request it.
We've only really been observing examples that affect an image, which may be the bulk of what you'd be using the parallax effect for. However, it came to my attention while I was building this site (source code) that it would be best if I could use this on other elements as the page scrolls (in this case, shrinking the header). As such, here are a couple of examples modifying other portions of the page:
Bacon ipsum dolor amet tenderloin pork salami leberkas ham hock pork chop. Doner sirloin capicola brisket hamburger. Filet mignon flank jowl cow turkey ground round.  Tail brisket shoulder capicola doner meatball ham hock.
Rump tri-tip chicken shoulder ball tip bresaola jowl alcatra tongue bacon shank. Beef ribs bresaola frankfurter pork tri-tip strip steak pork belly spare ribs sausage cow.  Beef frankfurter sausage t-bone, ball tip landjaeger pastrami rump kevin doner. Beef ribs venison boudin turducken shoulder pastrami, t-bone pork loin short loin sirloin. Jerky pastrami capicola pork, chuck biltong cow t-bone tenderloin tail tri-tip shank prosciutto. Corned beef pork belly kevin, bresaola sausage filet mignon swine prosciutto capicola frankfurter ball tip.
Spare ribs salami pastrami fatback beef ribs shankle bacon tenderloin cow ham hock shoulder corned beef short loin short ribs. Ball tip cow strip steak, fatback turkey kevin boudin meatball venison. Sausage salami meatloaf ham hock, kevin ground round short loin shankle beef ribs kielbasa tongue porchetta tenderloin beef. Turducken tri-tip pork frankfurter, kevin ball tip chicken kielbasa. Turducken picanha pastrami ham hock jerky beef frankfurter brisket bacon ball tip cow sirloin. Short loin turkey pork loin beef ribs boudin chicken jerky shankle salami meatball.

I move when you scroll!

 . . . CONTENT . . .

You can see that elements can move about according to the scroll, you can set maximum and minimum constraints, specify a different unit, and use special css syntaxes (in regards to the 'transform:rotate'). Most css attributes work when you plug it in to the parallaxCss property of the config, but you have to make sure it is in camelCase, and if it's a special property, (e.g. "rotate(VALUE)", "calc(VALUE)", "translate(VALUE)", etc.) that you add the ":" and the modifier without the parentheses and value ("rotate", "calc", etc.). With that, you should be able to have no problems with the css properties you pass in.
I would also like to mention that currently, this plugin doesn't support multiple properties being passed in and modified on scroll. It is a possible future feature, but for now, the only way to do it is to pass in another function that modifies it further as I'll explain below. Either that, or you can just write something by yourself to handle that.
We've only really been observing examples that affect an image, which may be the bulk of what you'd be using the parallax effect for. However, it came to my attention while I was building this site (source code) that it would be best if I could use this on other elements as the page scrolls (in this case, shrinking the header). As such, here are a couple of examples modifying other portions of the page:
Bacon ipsum dolor amet tenderloin pork salami leberkas ham hock pork chop. Doner sirloin capicola brisket hamburger. Filet mignon flank jowl cow turkey ground round.  Tail brisket shoulder capicola doner meatball ham hock.
Rump tri-tip chicken shoulder ball tip bresaola jowl alcatra tongue bacon shank. Beef ribs bresaola frankfurter pork tri-tip strip steak pork belly spare ribs sausage cow.  Beef frankfurter sausage t-bone, ball tip landjaeger pastrami rump kevin doner. Beef ribs venison boudin turducken shoulder pastrami, t-bone pork loin short loin sirloin. Jerky pastrami capicola pork, chuck biltong cow t-bone tenderloin tail tri-tip shank prosciutto. Corned beef pork belly kevin, bresaola sausage filet mignon swine prosciutto capicola frankfurter ball tip.
Spare ribs salami pastrami fatback beef ribs shankle bacon tenderloin cow ham hock shoulder corned beef short loin short ribs. Ball tip cow strip steak, fatback turkey kevin boudin meatball venison. Sausage salami meatloaf ham hock, kevin ground round short loin shankle beef ribs kielbasa tongue porchetta tenderloin beef. Turducken tri-tip pork frankfurter, kevin ball tip chicken kielbasa. Turducken picanha pastrami ham hock jerky beef frankfurter brisket bacon ball tip cow sirloin. Short loin turkey pork loin beef ribs boudin chicken jerky shankle salami meatball.

I move when you scroll!

 . . . CONTENT . . .

@Component({ . . . }) class AppComponent { parallaxFn(color: string, maxVal: number = 250, minVal: number = 0, otherValue: number = 0) { // put logic here } }
A lot is going on here. I specified three new things in my parallax config object: "cb", "cb_context", and "cb_args". "cb" is the callback function you'd want the parallax directive to call when it evaluates the scroll. "cb_context" is the context you want the function to run in, or the explicit "this" binding for the function. "cb_args" is an array of the arguments you want to pass into the function. Because of the many moving parts that come into play when you specify a callback function for the parallax directive to run, I would suggest you try to acheive the affects you want without having to resort to this, but this is a viable option in case more complex logic is needed.
There are some other considerations you should have when you use this that I'd like to mention before I am fully done with this test page. First is you have to be careful how many properties you send into the ParallaxConfig via the html route. By default, Angular 2 does not allow more than 9 properties defined in the html, and as such if you have a really large, complex ParallaxConfig object, you need to make sure that it will work if you define it in your host component's class.
Callback functions are run synchronously. Don't use any hefty process in the callback functions, as it can cause some negative affects on your page, and in the end gives the user a bad experience. The lighter you make everything and the less you use the parallax effect on a single page, the better off this will be.
Feedback and issues are very helpful in the development of this component. It will be kept up-to-date with the development of Angular 2 as much as possible. If you'd like to see this component in another form, post an issue for it on the GitHub page, and I'll do my best to work on it and get back to you. If you'd like to help with the development of this component, feel free to send me a message or email and I can add you as a collaborator or just send a pull request out.
Above all, thanks for showing interest in this project!


|
| final double | t |
| |
| final double | pos |
| |
| final double | vel |
| |
| final double | acc |
| |
A MotionState is a completely specified state of 1D motion through time.
◆ MotionState() [1/2]
| frc.lib.motion.MotionState.MotionState |
( |
double |
t, |
|
|
double |
pos, |
|
|
double |
vel, |
|
|
double |
acc |
|
) |
| |
◆ MotionState() [2/2]
| frc.lib.motion.MotionState.MotionState |
( |
MotionState |
state | ) |
|
◆ acc()
| double frc.lib.motion.MotionState.acc |
( |
| ) |
|
◆ coincident() [1/2]
| boolean frc.lib.motion.MotionState.coincident |
( |
MotionState |
other | ) |
|
Checks if two MotionStates are coincident (t, pos, and vel are equal within a nominal tolerance, but acceleration may be different).
◆ coincident() [2/2]
| boolean frc.lib.motion.MotionState.coincident |
( |
MotionState |
other, |
|
|
double |
epsilon |
|
) |
| |
Checks if two MotionStates are coincident (t, pos, and vel are equal within a specified tolerance, but acceleration may be different).
◆ equals() [1/2]
| boolean frc.lib.motion.MotionState.equals |
( |
MotionState |
other, |
|
|
double |
epsilon |
|
) |
| |
Checks if two MotionStates are epsilon-equals (all fields are equal within a specified tolerance).
◆ equals() [2/2]
| boolean frc.lib.motion.MotionState.equals |
( |
Object |
other | ) |
|
Checks if two MotionStates are epsilon-equals (all fields are equal within a nominal tolerance).
◆ extrapolate() [1/2]
| MotionState frc.lib.motion.MotionState.extrapolate |
( |
double |
t | ) |
|
Extrapolates this MotionState to the specified time by applying this MotionState's acceleration.
- Parameters
-
- Returns
- A MotionState that is a valid predecessor (if t<=0) or successor (if t>=0) of this state.
◆ extrapolate() [2/2]
| MotionState frc.lib.motion.MotionState.extrapolate |
( |
double |
t, |
|
|
double |
acc |
|
) |
| |
Extrapolates this MotionState to the specified time by applying a given acceleration to the (t, pos, vel) portion of this MotionState.
- Parameters
-
| t | The time of the new MotionState. |
| acc | The acceleration to apply. |
- Returns
- A MotionState that is a valid predecessor (if t<=0) or successor (if t>=0) of this state (with the specified accel).
◆ flipped()
Returns a MotionState that is the mirror image of this one. Pos, vel, and acc are all negated, but time is not.
◆ nextTimeAtPos()
| double frc.lib.motion.MotionState.nextTimeAtPos |
( |
double |
pos | ) |
|
Find the next time (first time > MotionState.t()) that this MotionState will be at pos. This is an inverse of the extrapolate() method.
- Parameters
-
| pos | The position to query. |
- Returns
- The time when we are next at pos() if we are extrapolating with a positive dt. NaN if we never reach pos.
◆ pos()
| double frc.lib.motion.MotionState.pos |
( |
| ) |
|
◆ t()
| double frc.lib.motion.MotionState.t |
( |
| ) |
|
◆ toString()
| String frc.lib.motion.MotionState.toString |
( |
| ) |
|
◆ vel()
| double frc.lib.motion.MotionState.vel |
( |
| ) |
|
◆ vel2()
| double frc.lib.motion.MotionState.vel2 |
( |
| ) |
|
◆ acc
| final double frc.lib.motion.MotionState.acc |
|
protected |
◆ kInvalidState
| MotionState frc.lib.motion.MotionState.kInvalidState = new MotionState(Double.NaN, Double.NaN, Double.NaN, Double.NaN) |
|
static |
◆ pos
| final double frc.lib.motion.MotionState.pos |
|
protected |
| final double frc.lib.motion.MotionState.t |
|
protected |
◆ vel
| final double frc.lib.motion.MotionState.vel |
|
protected |
The documentation for this class was generated from the following file:


Hi, my name is Rishi Pisipati! Welcome to my portfolio.
I currently work as a Software Engineer at Betterlesson
since July of 2021.
I graduted from the Masters of Educational Technology and Applied
Learning Science (METALS) program at Carnegie Mellon University. I
am a passionate developer with over 2 years of experience in
Software and Web Development.
My main area of interest lies in developing systems and platforms
that enable educators and industry practicioners to empower
students and teachers most effectively.
In my current role, I am a full stack engineer at Betterlesson, a company that specializes in providing professional development to teachers in the K-12 space.
Some of my biggest accomplishment working here are:
I was a developer at one of Renaissance's engineering teams that's
responsible for maintaining and developing new features for the
assessment products.
While there were a lot of incredible stories I got to work on at
Renaissance, the ones that I feel I have provided the organization
value with sustainable value are:
Currently a student at CMU's METALS program, a program designed by the Human Computer Interaction Insititute. I specialize in developing personalized online education systems.
As a part of my curriculum, I studied a wide array of subjects like Object Oriented Programming, Data Structures, Algorithm Design, Computer Networks, Artificial Intelligence and Educational Technology. I developed several applications and modules, while applying my skills in the real world by consulting for companies in the real world.
Don't fall for it was an educational video game designed to teach the elderly about email scams. It incorporates Bayesian Knowledge Tracing as a means to effectively assess player knowledge as they go through the game.
View ProjectModified Lengstrom's repository to incorporate fast style transfer with color preservation in videos. This project can also be potentially used to create concept albums for music videos.
View DemoDeveloped a Mate in One Tutor using CTAT using Rule Based Tutoring (Nools). The tutor provides immediate feedback on a user's guess and shows all the possible moves that the user can make when deciding on a move. Provides bottom out hints when a student fails their procedure.
View ProjectUses Gaussian Blurring alongside min-max functions in OpenCV to accurately position watermarks in appropriate corners for bulk images.
View ProjectLearning walks are an exercise utilized by Betterlesson to evaluate the efficacy of professional development services through a process of iterative feedback and evaluation across multiple classrooms. We proposed a complete digitization of this experience and provided on demand reports with an eye for ease of access and distribution between multiple stakeholders.
UPMC organized a Hackathon on October 5th, 2018. The hackathon
was an event to solve 11 real problems for the children and
families at Children’s Hospital of Pittsburgh. Members of the
UPMC Children's Hospital of Pittsburgh community, including
patients, families, physicians and nurses, presented 11 problems
as
pain points, with topics ranging from following proper medicine schedules
to deciphering asthma demographics.
Our team designed a low cost prototype for monitoring the expiry
and temperature of breast milk.
AISEP conducted a parliamentary session on the reform of Total Education in 2016. I proposed an initiative for digitizing and distributing K-12 curriculum for the state of Kerela, seeing as they had recently achieved the milestone of providing internet access for all of their citizens. I won two awards, one for the best written proposal, the other was an honorary mention from the current government for the proposal's feasibility and speed of implementation. The proposal was then sent to the Kerelan Ministry of Education for further consideration.
View Event


Fila Hotels & Resorts |
||
Maldives govt. warns tour operators Fila resorts may cease operationsGovernment of Maldives has warned tour operators that resorts under Fila Group might cease operations. A statement issued by Tourism Ministry on January 30th, states that a temporary license was granted to Fila Group as the Group had pending payments to the state and by issuing the temporary license, the state had hoped the pending amounts would be paid. However, the statement said the actions of the group had confirmed they had no intention of doing so. It also added that Fila Group was defying the state and state agencies and encouraging their employees to protest in sight of their guests. Tourism Ministry warned that the state would not grant any reprieves for Fila Group in th future, after the present temporary license expires. Given this, the statement said, it was likely that Fila Group resorts might cease their operations. Why Chinese and Indian celebrities love this Maldives resortWhat is it? An exclusive five-star resort on a private island in the Maldives fringed by palm trees and white-sand beaches and lapped by crystal-clear seas. And what makes it different from all the other exclusive five-star resorts on a private island in the Maldives fringed by palm trees and white-sand beaches and lapped by crystal-clear seas? OK, there are a few – more than 100, in fact, with some 25 opening in the past year and tourism arrivals rising even faster than sea levels. But this one does have the benefit of splendid isolation. It’s at the northernmost tip of the Maldives and is actually closer to India than the country’s capital, Malé. (It takes a 320km seaplane transfer to get here.) Unlike the less remote resorts, there are no boats and seaplanes buzzing by every few minutes. So you can pad around in a state of undress on your sea-view patio without the fear of snap-happy daytrippers disrupting your reverie. You are more likely to scandalise a school of passing dolphins. Who visits? Comfortably off types, mostly. Recent guests have included British pop star Noel Gallagher, Portuguese soccer legend Luis Figo and a veritable galaxy of Chinese and Indian film stars. JA Manafaru is popular, too, with well-heeled Chinese tourists, who have been a huge factor in the growth of tourism in the Maldives. This is why it has Mandarin-speaking staff, a Chinese chef, life vests to wear while snorkelling and direction signs in Chinese as well as English. They need direction signs on a tiny island? Surprisingly, yes. It’s dense with lush undergrowth and it’s surprisingly easy to get lost on your way between the seven restaurants, bars, spa, gym and water sports centre scattered around its 14 hectares. And there are big-wheeled mountain bikes for every guest to meander confusedly around on. So why are the Maldives sinking? Conventional wisdom has it that global warming is to blame. However, I have a sneaking suspicion the process may be being speeded up ever so slightly by the sheer volume of alcohol on the islands. |
||
| © 2018 Fila Hotels & Resorts |


Multifractal estimation - Day 3
Multifractal estimation
- We will use box counting to estimate $D_q$
$$D_q = \lim_{r \to 0} \frac{1}{q-1}\frac{log \left[ M_q(r) \right]}{\log r}$$
-
We cover the object with square non-overlapping boxes of size $r$ and repeat the procedure using a range of $r$ values. This range is determined by the size of our sample.
-
in practice $D_q$ is estimated by the slope of the scaling relation for a range of $q$
$$M_q(r) = A r^{-\tau_q}$$
$$\log(M_q(r)) = \log A - \tau_q log(r)$$
$$D_q = \frac{\tau_q}{(q-1)}$$
-
Estimating $D_q$ is not very difficult but is no so simple. We need the following steps:
-
Chose a range of $q$ and a range of $r$
-
Start with the first $q$
-
Start with the first $r$
-
Cover the object with boxes of side $r_1$
-
Calculate $M_q(r_1)$ store the result.
-
Do this for all $r$’s in the range.
-
Now we have all $r$’s and $M_q(r)$ to calculate $\tau_q$ by regression
-
Repeat 3. - 7. for all the $q$s
-
-
If somebody want to do this in R as a final project, we cant talk later.
-
We will use an open source software mfSBA available at http://github/lsaravia/mfsba
Using mfSBA
-
To automate repetitive task and perform visualizations we will use R but we need to know how to use mfSBA
-
To invoke an external program from R we use:
system("./mfSBA")
or under windows
system("mfSBA.exe")
-
In the console appears some information about the parameters
Parameter Description inputFile The file we want to use qFile A file that indicates the $q$’s range minBox The size of the first box maxBox The size of the last box. The intermediate boxes are calculated as powers of 2. numBoxSizes limit the number of boxes, not very useful. option we will use the option S that makes $\sum p_i=1$ -
mfSBA can use tif files but I can’t make it work in windows so we will use its own format that is called “sed”. Sed files are text files with a matrix structure.
s <- "./mfSBA K1_laSelva.sed q.sed 2 512 20 S" system(s)
-
This generates several files:
a.K1_laSelva.sed f.K1_laSelva.sed t.K1_laSelva.sed s.K1_laSelva.sed
a.file/f.file have data for $f(\alpha)$ and $\alpha$ an equivalent way to express $D_q$ that we will not use.
t.file has $\log( M_q(r))$ and the box sizes used, useful to check the validity of the regression.
s.file has $\tau_q$, $\alpha$ and $f(\alpha)$, the $R^2$’s and standard deviations, so we will use mostly this file.
sf <- read.table("s.K1_laSelva.sed", header=T)
Exercise
-
make a function to read the s.file and discard all the things we don’t need and calculate $D_q$
-
The first step to do a function like this is to test if commands works.
-
A possible answer:
readDq <- function(sname) { pp <- read.table(sname, header=T) pp$Dq <- with(pp,ifelse(q==1,alfa,Tau/(q-1))) pp$SD.Dq <- with(pp,ifelse(q==1,SD.alfa,abs(SD.Tau/(q-1)))) pp$R.Dq <- with(pp,ifelse(q==1,R.alfa,R.Tau)) return(pp[,c("q","Tau,"SD.Tau","Dq","SD.Dq","R.Dq")]) }
Analyze the output
-
First use our function to get all we need
dq <- readDq("s.K1_laSelva.sed") require(ggplot2) pp <- ggplot(dq, aes(x=R.Dq)) + geom_histogram() pp range(dq$R.Dq)
-
$R^2$ seems very high, that means a very good fit, we could check more using the t.file. Let’s try:
tf <- read.table("t.K1_laSelva.sed", header=T)
Oops error: the first line do not have the same number of labels as columns.
tf <- read.table("t.K1_laSelva.sed", skip=1) names(tf)[1] <- "Box" names(tf)[2] <- "logBox"
-
And check with the Durbin-Watson statistic
lm0 <- lm(V3~logBox,data=tf) summary(lm0) require(car) dwt(lm0)
-
Let’s check another $q$
lm0 <- lm(V23~logBox,data=tf) dwt(lm0)
-
Thus there is some autocorrelation. Let’s check graphically
pp <- ggplot(data=tf,aes(x=logBox,y=V23))+geom_point()+geom_smooth(method="lm") pp
-
When there is low $R^2$ or autocorrelation is better to check graphically.
$D_q$ for La Selva
-
We can plot $D_q$ with using SD as error bars
pp <- ggplot(dq, aes(x=q, y=Dq)) + geom_errorbar(aes(ymin=Dq-SD.Dq, ymax=Dq+SD.Dq), width=.1) + geom_line() + geom_point() pp
Exercise 1
- Plot $\tau_q$
Exercise 2
-
Can we make more functions to automate the task if we need to repeat the analysis?
-
A function to read the data, show the $R^2$ histogram and add $D_q$ to a data frame.
-
A function to plot all the $D_q$ linear fit for all $q$


Welcome to AppCloud's debugging portal.
To get started enter the a unique ID to identify yourself or use the unique ID we have generate below. Once you have your ID selected hit the "debug" button below, shake your phone and then scan the QR code found on the next page. Happy Debugging
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About Us
AKB Global School
AKB Global School , Kabulpur,Bangra , Faridabad is an unaided Christian
Minority Institution. It is owned by the Institute of the
Franciscan Clarist Missionaries of the Most Blessed Sacrament, a
body registered under the Societies Registration Act XXI 1860 and
having its office at Clara Niwas, Kalu Sarai, New Delhi – 110016.
The Institute runs English/Vernacular – medium Schools,
Orphanages, Dispensaries, Home for the aged, Working Girl’s Hostel
and other Welfare centres in various parts of the country,
especially in the remotest hinterlands. This is run by the
Franciscan Sisters’ Trust for Education.
The school began on January 5, 1970 with 50 students on roll, and
it has progressed extensively within a short span. It was
affiliated to the...


The Story
Like a lot of Chef users, I'm using Vagrant for testing my cookbooks. I'm also using Berkshelf for providing the Vagrant box with the cookbooks it needs.
Until recently, I was happy using the ChefDK-provided Berlshelf (v4.0.1). I stopped being happy when running berks
started consuming CPU for ~5 mins and then failing when my Berksfile
contained multiple sources (the Chef Supermarket and my private Chef server).
While troubleshooting it I've learned that there's an issue with the native dependency graph solver, and I won't be able to fix it in less than a week.
I also noticed that the latest version of the Berkshelf gem (v4.1.1) had no such issues (unless I'm mistaken, it's because it switched to the native Ruby graph solver).
The next logical step was migrating to the new version of Berkshelf
Attempting to upgrade Berkshelf in the ChefDK
I firstly tried working inside ChefDK by upgrading its version of ChefDK.
This made me learn several interesting things:
- The
/usr/bin/berks
file (actually/opt/chefdk/bin/berks
) loads specific versions of Gems.
This means that even if I install the new version of Berkshelf correctly, I'd have to modify this entry point, and it won't be trivial. - The ChefDK Ruby environment is configured to install new Gems into the User's home directory (using
GEM_HOME
).
I'm not sure why (something related with developing gems?) - The only way I could execute the new Berkshelf gem "properly" inside the ChefDK was using a
Gemfile
and something likechef exec bundle exec Berkshelf
, which was really annoying
Eventually I decided that the comfort of working inside the ChefDK isn't worth the effort, as taking a clean Ruby 2 environment (e.g. using RVM or Bundler) and installing the Berkshelf Gem inside was effortless.
This worked well for non-Vagrant usage (e.g. calling it from Jenkins), but I still had quite a lot of work.
Running Ruby in Vagrant
My second issue was with running any Ruby code from inside Vagrant.
As any Vagrant-Berkshelf veteran knows, the workflow goes something like this:
- User runs some command requiring provisioning, like
vagrant up
- Vagrant calls the
vagrant-berkshelf
methods pretty early in the Vagrant workflow (afterVagrant::Action::Builtin::ConfigValidate
) vagrant-berkshelf
runsberks install
to locate all relevant cookbooks and generate theBersfile.lock
vagrant-berkshelf
callsberks vendor
to make a directory containing all cookbooks that the VM needs, which will be accessed by the Chef client on the VM And so forth
This workflow heavily depends on Vagrant executing Berkshelf, which works with ChefDK's Berkshelf because its entry point is "environment-variable proof":
#!/opt/chefdk/embedded/bin/ruby
#--APP_BUNDLER_BINSTUB_FORMAT_VERSION=1--
ENV["GEM_HOME"] = ENV["GEM_PATH"] = nil unless ENV["APPBUNDLER_ALLOW_RVM"] == "true"
#...
Compare this to the "normal" entry point generated by Gems:
#!/usr/bin/ruby2.0
#
# This file was generated by RubyGems.
#
# The application 'berkshelf' is installed as part of a gem, and
# this file is here to facilitate running it.
#
require 'rubygems'
version = ">= 0"
if ARGV.first
str = ARGV.first
str = str.dup.force_encoding("BINARY") if str.respond_to? :force_encoding
if str =~ /\A_(.*)_\z/
version = $1
ARGV.shift
end
end
gem 'berkshelf', version
load Gem.bin_path('berkshelf', 'berks', version)
The environment negation (deleting GEM_HOME
and GEM_PATH
) is (IMO) related to the Vagrant use-case.
Fact is, Vagrant is polluting the environment of subprocesses with Vagrant-specific Ruby-related variables.
Vagrant, Bundler and external processes
Vagrant uses Bundler as a way of managing its Ruby dependencies (both internal and plugins), so Vagrant suffers from the same issue that Bundler has - it assumes that subprocesses are supposed to run inside its own Ruby environment. To do so, it modifies its own ruby-related environment variables, such as GEM_PATH
(where to look for gems) and GEM_HOME
(where gems should be installed).
For cases where it's not true, Bundler offers a method called Bundler.with_clean_env
. This should yield (execute a given code block) with the "original" environment (the one bundler had when it started), so any processes spawned from that block should be free of the Bundler contamination.
Vagrant tries to utilize this method, but it doesn't work as expected.
with_clean_env
internals
Let's drill down a bit:
# https://github.com/bundler/bundler/blob/5131fcd/lib/bundler.rb#L211
def with_clean_env
with_original_env do
ENV['MANPATH'] = ENV['BUNDLE_ORIG_MANPATH']
ENV.delete_if { |k,_| k[0,7] == 'BUNDLE_' }
if ENV.has_key? 'RUBYOPT'
ENV['RUBYOPT'] = ENV['RUBYOPT'].sub '-rbundler/setup', ''
ENV['RUBYOPT'] = ENV['RUBYOPT'].sub "-I#{File.expand_path('..', __FILE__)}", ''
end
yield
end
end
# https://github.com/bundler/bundler/blob/5131fcd/lib/bundler.rb#L203
def with_original_env
bundled_env = ENV.to_hash
ENV.replace(ORIGINAL_ENV)
yield
ensure
ENV.replace(bundled_env.to_hash)
end
# https://github.com/bundler/bundler/blob/5131fcd/lib/bundler.rb#L16
module Bundler
ORIGINAL_ENV = environment_preserver.restore
ENV.replace(environment_preserver.backup)
#...
So, when the Bundler module is loaded, it creates a backup of the current environment variables. This backup (plus some modifications) is used whenever with_clean_env
is called. How can it break?
By adding debug prints inside the Bundler gem, I deduced the following facts:
-
Bundler is invoked twice
First, the entry point ispre-rubygems.rb
, as evident from the vagrant launcher:// Line 187 cmd.Args[0] = "ruby" cmd.Args[1] = filepath.Join(gemPath, "lib", "vagrant", "pre-rubygems.rb") //... if err := cmd.Start(); err != nil { // ...
Note these bits at lib/vagrant/pre-rubygems.rb:
# Line 19 require_relative "bundler"
# Line 30 if ENV["VAGRANT_EXECUTABLE"] Kernel.exec("ruby", ENV["VAGRANT_EXECUTABLE"], *ARGV) else Kernel.exec("vagrant", *ARGV) end
And finally, this in
bin/vagrant
:# Line 69 require "bundler"
As you can see, the
pre-rubygems.rb
file is invoked first, loads Bundler, and then execs the Vagrant entry point, which loads its own Bundler. So the Bundler gem is loaded twice, and the second instance "saves" the environment already modified by the first instace, meaningwith_clean_env
is useless. -
Vagrant works around this
The Vagrant devs tried to solve this issue by backing up the environment variables before any modification, like so:// https://github.com/mitchellh/vagrant-installers/blob/c5eb9bb/substrate/launcher/main.go // Line 18 const envPrefix = "VAGRANT_OLD_ENV"
// https://github.com/mitchellh/vagrant-installers/blob/c5eb9bb/substrate/launcher/main.go // Line 150 for _, value := range os.Environ() { idx := strings.IndexRune(value, '=') key := fmt.Sprintf("%s_%s", envPrefix, value[:idx]) newEnv[key] = value[idx+1:] }
And then allow restoring from it:
# https://github.com/mitchellh/vagrant/blob/27157b5/lib/vagrant.rb # Line 236 def self.original_env {}.tap do |h| ENV.each do |k,v| if k.start_with?("VAGRANT_OLD_ENV") key = k.sub(/^VAGRANT_OLD_ENV_/, "") h[key] = v end end end end end
This method works (sort of).
with_original_env
is done wrong
Both the Bundler backup environment and the Vagrant backup environment are being handled in Vagrant::Util::Env.with_original_env
:
def self.with_original_env
original_env = ENV.to_hash
ENV.replace(::Bundler::ORIGINAL_ENV) if defined?(::Bundler::ORIGINAL_ENV)
ENV.update(Vagrant.original_env)
yield
ensure
ENV.replace(original_env.to_hash)
end
Now, notice the two issues here:
- In the normal Vagrant flow (working via the Vagrant launcher), the
Bundler::ORIGINAL_ENV
hash is useless because of the double invocation of Bundler. -
Because we're only using
update
with the "proper" environment backup, values won't be deleted, only replaced:good={'a'=>1} bad={'a'=>2,'b'=>3} bad.update(good) bad # => {"a"=>1, "b"=>3}
So values that didn't exist in the backup and do exist in the current environment (e.g.
GEM_PATH
) will stay.
The Solution
This is the relevant PR
Firsty, I modified Vagrant::Util::Env.with_original_env
.
I made the assumption that if we're going through the Vagrant launcher, we only need to restore its environment.
If not, we'll restore the Bundler environment, if one exists.
The result looks like this:
proxy_env = Vagrant.original_env
if Vagrant.original_env.any?
ENV.replace(proxy_env)
elsif defined?(::Bundler::ORIGINAL_ENV)
ENV.replace(::Bundler::ORIGINAL_ENV)
end
After that, I had to locate the code in charge of spawning new processes and make sure that it's using the right logic.
The interesting method is Vagrant::Util::Subprocess#execute
in lib/vagrant/util/subprocess.rb.
It's very long, but you can save yourself reading it by believing me that the only thing it does about saving the subprocess from the Bundler modifications is calling jailbreak
, which is defined in the same file.
The introduction for this method is best quoted from the file direct:
This is, quite possibly, the saddest function in all of Vagrant.
The method itself does plenty with the environment, mainly dealing with environment-related corner cases. Our interesting part is this:
env.replace(::Bundler::ORIGINAL_ENV) if defined?(::Bundler::ORIGINAL_ENV)
env.merge!(Vagrant.original_env)
Instead of repeating the logic from with_original_env
, I removed it from jailbreak
, and instead took process.start
from execute
and wrapped it in with_original_env
, like so:
Vagrant::Util::Env.with_original_env do
process.start
end
I might have misunderstood jailbreak a bit, but hopefully it'll work OK.
And there you have it.


|
pool-unity-objects
|
Basic interface for an object pool of a single object type. In terms of usage, ObjectPool presents the same GetInstance() function as ObjectFactory but adds the additional constraint that pooled objects must implement the Poolable interface More...
Public Member Functions | |
| void | DestroyPool () |
| Destroy the pool and cleanup all pooled instances and other resources. More... | |
| Public Member Functions inherited from BeatThat.Pools.UnityObjects.IObjectFactory< T > | |
| T | GetInstance () |
Properties | |
| int | numNewCalls [get] |
| Stat: how many times has a new instance been created (as opposed to a pooled object being reused) More... | |
| int | numGetCalls [get] |
| Stat: how many times has an instance been requested via GetInstance() More... | |
| int | numReuseGetCalls [get] |
| Stat: how many times has GetInstance() returned a previously existing pooled object More... | |
Basic interface for an object pool of a single object type. In terms of usage, ObjectPool presents the same GetInstance() function as ObjectFactory but adds the additional constraint that pooled objects must implement the Poolable interface
| T | : | class |
| void BeatThat.Pools.UnityObjects.IObjectPool< T >.DestroyPool | ( | ) |
Destroy the pool and cleanup all pooled instances and other resources.
Implemented in BeatThat.Pools.UnityObjects.UnityObjectPool< T >, and BeatThat.Pools.UnityObjects.ObjectPool< T >.
|
get |
Stat: how many times has an instance been requested via GetInstance()
|
get |
Stat: how many times has a new instance been created (as opposed to a pooled object being reused)
|
get |
Stat: how many times has GetInstance() returned a previously existing pooled object


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