@Beta public abstract class AbstractExpression extends java.lang.Object implements Expression
Expression
methods.| Constructor and Description |
|---|
AbstractExpression() |
| Modifier and Type | Method and Description |
|---|---|
boolean |
booleanValue()
Returns the value of the symbol as a boolean.
|
int |
compareTo(java.lang.Object anotherObject) |
double |
doubleValue()
Returns the value of the symbol as a double.
|
boolean |
equals(java.lang.Object another)
Indicates whether two expressions are syntactically equal, allowing comparisons to Strings as well as a convenience
(this is equivalent to comparing to the
Symbol obtained from the String). |
Expression |
get(int index)
Same as
Expression.getArguments() .get(i) , but potentially more efficient. |
abstract java.util.List<Expression> |
getArguments()
Returns the arguments of a function application expression if this is one.
|
abstract Expression |
getFunctor()
Returns the functor if the expression is a function application, or
null otherwise. |
Expression |
getFunctorOrSymbol()
Returns the functor if the expression is a function application, or the symbol otherwise.
|
java.util.Iterator<Expression> |
getImmediateSubExpressionsIterator() |
java.util.List<Expression> |
getSubExpressions() |
java.lang.Object |
getValue()
Returns the value of an expression if it is a
Symbol ,
and null otherwise. |
boolean |
hasFunctor(java.lang.Object functor)
Indicates whether expression is a function application with given functor.
|
int |
hashCode() |
int |
intValue()
Returns the value of the symbol as an int.
|
int |
intValueExact()
Returns the value of the symbol as an int.
|
boolean |
isStringLiteral()
Determine if the value of the Symbol is a string literal.
|
long |
longValue()
Returns the value of the symbol as a long.
|
abstract java.lang.String |
makeToString()
Computes the value of
Object.toString() ,
which caches it the first time it is invoked for this object. |
int |
numberOfArguments()
Same as
Expression.getArguments() .size() , but potentially more efficient. |
Rational |
rationalValue()
Returns the value of the symbol as a Rational.
|
Expression |
replace(ExpressionAndSyntacticContext replacementAndContext) |
Expression |
replace(com.google.common.base.Function<Expression,Expression> replacementFunction,
boolean onlyTheFirstOne,
PruningPredicate prunePredicate,
boolean ignoreTopExpression,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replace(com.google.common.base.Function<Expression,Expression> replacementFunction,
ReplacementFunctionMaker makeSpecificSubExpressionAndSyntacticContextReplacementFunction,
PruningPredicate prunePredicate,
PruningPredicateMaker makeSpecificSubExpressionAndSyntacticContextPrunePredicate,
boolean onlyTheFirstOne,
boolean ignoreTopExpression,
boolean replaceOnChildrenBeforeTopExpression,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry)
Returns the result of replacing one or all sub-expressions of this expression
according to a replacement function.
|
Expression |
replaceAllOccurrences(Expression replaced,
Expression replacement,
PruningPredicate prunePredicate,
Registry registry) |
Expression |
replaceAllOccurrences(Expression replaced,
Expression replacement,
PruningPredicate prunePredicate,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replaceAllOccurrences(Expression replaced,
Expression replacement,
Registry registry) |
Expression |
replaceAllOccurrences(Expression replaced,
Expression replacement,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction,
PruningPredicate prunePredicate,
Registry registry) |
Expression |
replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction,
PruningPredicate prunePredicate,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction,
Registry registry) |
Expression |
replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction,
ReplacementFunctionMaker makeSpecificSubExpressionAndSyntacticContextReplacementFunction,
PruningPredicate prunePredicate,
PruningPredicateMaker makeSpecificSubExpressionAndSyntacticContextPrunePredicate,
Registry registry) |
Expression |
replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replaceFirstOccurrence(Expression replaced,
Expression replacement,
PruningPredicate prunePredicate,
Registry registry) |
Expression |
replaceFirstOccurrence(Expression replaced,
Expression replacement,
PruningPredicate prunePredicate,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replaceFirstOccurrence(Expression replaced,
Expression replacement,
Registry registry) |
Expression |
replaceFirstOccurrence(Expression replaced,
Expression replacement,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction,
PruningPredicate prunePredicate,
Registry registry) |
Expression |
replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction,
PruningPredicate prunePredicate,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
Expression |
replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction,
Registry registry) |
Expression |
replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction,
ReplacementFunctionMaker makeSpecificSubExpressionAndSyntacticContextReplacementFunction,
PruningPredicate prunePredicate,
PruningPredicateMaker makeSpecificSubExpressionAndSyntacticContextPrunePredicate,
Registry registry) |
Expression |
replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction,
TernaryProcedure<Expression,Expression,Registry> listener,
Registry registry) |
java.lang.String |
toString() |
getImmediateSubExpressionsAndContextsIterator, getScopedExpressions, getSyntacticFormType, getSyntaxTree, replaceSymbol, set
public Expression replaceFirstOccurrence(Expression replaced, Expression replacement, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(Expression replaced, Expression replacement, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(Expression replaced, Expression replacement, PruningPredicate prunePredicate, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(Expression replaced, Expression replacement, PruningPredicate prunePredicate, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction, PruningPredicate prunePredicate, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction, PruningPredicate prunePredicate, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction, ReplacementFunctionMaker makeSpecificSubExpressionAndSyntacticContextReplacementFunction, PruningPredicate prunePredicate, PruningPredicateMaker makeSpecificSubExpressionAndSyntacticContextPrunePredicate, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction, ReplacementFunctionMaker makeSpecificSubExpressionAndSyntacticContextReplacementFunction, PruningPredicate prunePredicate, PruningPredicateMaker makeSpecificSubExpressionAndSyntacticContextPrunePredicate, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(Expression replaced, Expression replacement, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(Expression replaced, Expression replacement, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(Expression replaced, Expression replacement, PruningPredicate prunePredicate, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(Expression replaced, Expression replacement, PruningPredicate prunePredicate, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replaceFirstOccurrence(com.google.common.base.Function<Expression,Expression> replacementFunction, PruningPredicate prunePredicate, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceFirstOccurrence
in interface Expression
public Expression replaceAllOccurrences(com.google.common.base.Function<Expression,Expression> replacementFunction, PruningPredicate prunePredicate, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replaceAllOccurrences
in interface Expression
public Expression replace(com.google.common.base.Function<Expression,Expression> replacementFunction, boolean onlyTheFirstOne, PruningPredicate prunePredicate, boolean ignoreTopExpression, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
replace
in interface Expression
public Expression replace(com.google.common.base.Function<Expression,Expression> replacementFunction, ReplacementFunctionMaker makeSpecificSubExpressionAndSyntacticContextReplacementFunction, PruningPredicate prunePredicate, PruningPredicateMaker makeSpecificSubExpressionAndSyntacticContextPrunePredicate, boolean onlyTheFirstOne, boolean ignoreTopExpression, boolean replaceOnChildrenBeforeTopExpression, TernaryProcedure<Expression,Expression,Registry> listener, Registry registry)
Expression
Registry
and indicates whether it (and its descendants) should be ignored.
Sometimes we wish the replacement and prune functions to be updated or changed accordingly to the characteristics of the sub-expressions or trees they are being used on.
For this reason, the replace method can take two function arguments, makeSpecificSubExpressionAndSyntacticContextReplacementFunction and makeSpecificSubExpressionAndSyntacticContextPrunePredicate,
which take this expression, the replacement function or pruning predicate, and the current sub-expression, and provides a new replacement function or prune predicate to be used
on that sub-expression and its descendants. This is a more advanced and less commonly used feature.
The argument onlyTheFirstOne allows us to choose to replace only the first sub-expression for which the replacement function returns a distinct object, or to continue examining all sub-expressions.
We can provide a listener procedure that gets notified of every replacement.replace
in interface Expression
replacementFunction
- takes a expression and returns a new expression, or itself in case no replacement is warranted. Make it an instance of ReplacementFunctionWithContextuallyUpdatedProcess
if it uses the contextual symbols and variables, so that the registry gets properly extended.prunePredicate
- a predicate evaluating as true for sub-expressions that should be pruned (that is, ignored).makeSpecificSubExpressionAndSyntacticContextPrunePredicate
- Takes the current expression, the current replacement function and the sub-expression and its registry about to be processed (the top one inclusive), and returns the pruning predicate to be used for that specific sub-expression.onlyTheFirstOne
- if true, replaces at most one sub-expression.ignoreTopExpression
- does not try to replace this expression as a whole; examines sub-expressions only.replaceOnChildrenBeforeTopExpression
- indicate whether to replace in sub-expression before replacing top expression.listener
- binary procedure receiving original and replacement expression every time such a replacement occurs. If a sub-expression is replaced, it is invoked for that sub-expression as well as for all its "super-expressions", since they are all being replaced by a new expression.registry
- the registry, used here for defining what is a sub-expression of what.public java.util.List<Expression> getSubExpressions()
getSubExpressions
in interface Expression
public Expression replace(ExpressionAndSyntacticContext replacementAndContext)
replace
in interface Expression
public java.util.Iterator<Expression> getImmediateSubExpressionsIterator()
getImmediateSubExpressionsIterator
in interface Expression
public Expression getFunctorOrSymbol()
Expression
getFunctorOrSymbol
in interface Expression
public abstract Expression getFunctor()
Expression
null
otherwise.getFunctor
in interface Expression
public boolean hasFunctor(java.lang.Object functor)
Expression
hasFunctor
in interface Expression
public int numberOfArguments()
Expression
Expression.getArguments()
.size()
, but potentially more efficient.numberOfArguments
in interface Expression
public abstract java.util.List<Expression> getArguments()
Expression
getArguments
in interface Expression
public Expression get(int index)
Expression
Expression.getArguments()
.get(i)
, but potentially more efficient.get
in interface Expression
public int compareTo(java.lang.Object anotherObject)
compareTo
in interface java.lang.Comparable<java.lang.Object>
public int hashCode()
hashCode
in class java.lang.Object
public boolean equals(java.lang.Object another)
Expression
Symbol
obtained from the String).
Note that the comparison to String violates the specification of equals, since s.equals(e)
for s
and e
String and Expression respectively will always return false, even if e.equals(s)
returns true.
However, this should not be a problem if Strings and Expressions are not mixed in containers or algorithms relying on equals,
which would not be possible even if the comparison to String convenience were omitted.
TODO: In the future we may replace this convenience by a method specific to comparing to Strings, which would be more explicit.
This will take some work as all invocations of equals on Strings would have to be replaced by this new method.equals
in interface Expression
equals
in class java.lang.Object
another
- the object to compare this expression to.public java.lang.Object getValue()
Expression
Symbol
,
and null
otherwise.
The reason it is available at the Expression
is
that is it a very commonly used method and casting makes the code harder to read.getValue
in interface Expression
public boolean isStringLiteral()
Expression
isStringLiteral
in interface Expression
public boolean booleanValue()
Expression
booleanValue
in interface Expression
public int intValue()
Expression
intValue
in interface Expression
public long longValue()
Expression
longValue
in interface Expression
public int intValueExact() throws java.lang.ArithmeticException
Expression
java.lang.ArithmeticException.ArithmeticException
is thrown if the value of the symbol is not a number OR not an integral value.intValueExact
in interface Expression
java.lang.ArithmeticException
public double doubleValue()
Expression
doubleValue
in interface Expression
public Rational rationalValue()
Expression
rationalValue
in interface Expression
public abstract java.lang.String makeToString()
Object.toString()
,
which caches it the first time it is invoked for this object.public java.lang.String toString()
toString
in class java.lang.Object


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{% extends 'base.html' %} {% load endless %} {% block article %}
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Research
Hyperautomation
Hyperautomation is the application of advanced technologies like AI and machine learning (ML) to augment workers and automate processes in ways that are significantly more impactful that traditional automation capabilities.
As no single tool can replace humans, hyperautomation involves using multiple tools in symphony, including robotic process automation (RPA), intelligent business management software (iBPMS) and AI, with the goal of increasingly AI-driven decision making. It’s the next step beyond RPA, further replacing human involvement in physical and digital tasks, and eventually the complete decision-making process.
As a side note: although not the main goal, hyperautomation often results in the creation of a digital twin of an organisation (DTO), allowing them to visualize how functions, processes and key performance indicators interact to drive value. The DTO then becomes an integral part of the hyperautomation process, providing real-time, continuous intelligence about the organization and driving significant business opportunities.
Link to Hyperautomation
Multiexperience
multiexperience is about adapting to the increasing market of different devices and their respective experiences. Applications now need to run on different platforms and adapt easily, all while providing a consistent experience from a business perspective.
Why is this relevant? For one, it’s because a few companies are already doing it and, for another, it’s because the average individual currently owns 3.2 different devices. In other words, it’s becoming the increasingly expected norm.
Link to Multiexperience
Distributed Cloud
Cloud providers use the distributed model to enable lower latency and provide better performance for cloud services. Beyond the cloud provider context, two other examples of distributed cloud are public resource computing and the volunteer cloud. Public resource computing is a cross between cloud computing and distributed computing that involves computers in geographically dispersed locations connected to collaborate on compute-intensive and/or computer-intensive tasks.
In a volunteer cloud, the resources of member computers are connected through a single service or hub to collaboratively construct and configure cloud infrastructure.
Link to Distributed Cloud


If you have an insatiable burning desire to contact them about anything, other than the topics below, then you can mail them here<EMAIL_ADDRESS>Press
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If you work in the games industry and would like to discuss business things with them then go ahead and contact them here<EMAIL_ADDRESS>Jobs
Up-to-date hiring information can be found over on their Jobs page


Identity Based Microsegmentation¶
The estimated time to complete this lab is 100 minutes.
Overview¶
The VDI Policy is based on identity-based categorization of the VDI VMs using Active Directory group membership. Configuring VDI policy includes adding an Active Directory domain that is used for the ID firewall (ID Based Security) and configuring a service account for the domain.
ID Based Security¶
ID firewall is an extension to Flow that allows you to write security policies based on users and groups in an Active Directory domain in which your VDI VMs are attached. When using ID firewall, you can import groups from Active Directory into Prism Central as categories (in the category key ADGroup), and then write policies around these categories as you would any for other category. A new type of policy has been added for this purpose - the VDI Policy. ID Firewall takes care of automatically placing VDI VMs in the appropriate categories on detecting user logons into the VM hosted on Nutanix infrastructure associated with Prism Central, thus allowing user and group based enforcement of Flow policies.
Creating a VDI Policy¶
ID firewall integrates Nutanix Flow with Microsoft Active Directory (AD), such that groups in AD can be imported into Prism Central as categories. These imported categories can then be used in the VDI policy as target groups, inbound traffic, and outbound traffic. Prism Central automatically places VMs inside the imported AD group categories when user logons are detected on VMs that are part of the Active Directory domain and also present on Nutanix managed clusters, thus applying security policies based on user group membership.
Note
Flow ID firewall does not detect user logoffs, the policy applied to a VM is kept applied until next user logon on the same VM.
- VMs with an AppType category assigned does not get categorized by ID Based Security. This is by design.
- If not already available, configure an Active Directory domain that is used for ID firewall.
- Configure a service account with required configuration for the Active Directory domain
- The registered Prism Element clusters must be running AOS version 5.17 or later
- The registered Prism Element clusters must be running AHV version 20190916.114 or later
In the Security Policies dashboard (see “Security Policies Summary View” in the Prism Central Guide) and click Create Security Policy. Select Secure VDI Groups (VDI Policy) and click Create.
You can create only one VDI policy for securing applications through ID Firewall. The Secure a VDI Environment page is displayed.
On the Define Policy tab, do the following in the indicated fields, and then click Next:
- The Policy Name and Purpose fields are auto-populated.
- Optionally, in the Advanced Configuration section, select the Allow radio button to allow IPv6 traffic. The policy rules apply to IPv4 traffic only and all IPv6 traffic is blocked by default.
Note
If you choose to block IPv6 traffic, the traffic will reamin blocked even in monitoring mode.
- Optionally, click the toggle button against Policy Hit Logs to log traffic flow hits on the policy rules.
You can configure syslog monitoring for the policy hit logs for Flow, see “Configuring Syslog Monitoring” in the Prism Central Guide for details.
Note
Policy hit logs are not generated if both source and destination are in inbound or outbound category.
- In the Secure AD Groups tab, do the following in the indicated fields and click Next.
- For Inbound Traffic, click + Add Source and enter the category or subnets that the VDI group can receive the traffic from, as the source.
- For each VDI ADGroup, click +Add AD Group to select the AD groups (categorized VDI VMs) that you want to secure. You can click Import all AD Groups to add all imported ADGroup categories to the VDI policy.
- For Outbound Traffic, click + Add Destination and enter the category or subnets that the VDI group can send the traffic to, as the destination.
Note
VDI Policy does not support visualisation
#. Do one of the following: - Click Apply Now to apply the VDI Policy.
- Click Save and Monitor to save the configuration.
You can switch between the monitoring and applied states on the Security Policies page and clicking the appropriate option in the Actions menu.
Configuring Active Directory Domain Services¶
Active Directory Domain Services configuration is used to import user groups for identity based security policies.
Before you begin
- Microsegmentation must be enabled to be able to use the ID Firewall feature, see Enabling Microsegmentation.
- For supported AHV and AOS versions, see Prism Central Release Notes.
Active Directory Requirements:¶
- Minimum supported domain functional level in Active Directory is Windows Server 2008 R2.
- ID Firewall checks the membership of Security Groups only, Distribution Groups are not supported.
- NTP must be configured in Active Directory.
- DNS must be configured if you want to use host name for domain controllers.
- Log on to the Prism Central web console.
- Click the collapse menu (“hamburger”) button on the left of the main menu and then select Prism Central Settings to display the Settings page.
- Click ID Based Security from the Settings menu (on the left).
The ID Based Security page is displayed. This page allows you to Add New Domain or use an Existing AD.
- If you select Use Existing AD in step 3, do the following in the indicated fields:
- Click the Manually Add Domain Controller button, then click + Domain Controller.
- Enter the IP Address or Host name of the domain controllers that you want to monitor for user logons events. You must add all the domain controllers associated with your Active Directory manually.
Click and add each domain controller individually, then click the blue check mark icon to save.
Note
DNS must be configured on the cluster for the host name option to work. CAUTION: Do not use the Domain Admin account as the service account considering the security best practices. Create a new domain user and grant it required permissions as described in Configure Service Account for ID Firewall.
- If you select Add New Domain in step 3, a set of fields is displayed. Do the following in the indicated fields:
Name: Enter a directory name.
This is a name you choose to identify this entry; it need not be the name of an actual directory.
Domain: Enter the domain name.
Enter the domain name in DNS format, for example, nutanix.com.
Directory URL: Enter the LDAP address of the directory, including the port number.
Service Account Username: Enter the service account user name in the<EMAIL_ADDRESS>format that you want Prism Central to use to detect logons and query user and group information from Active Directory.
A service account is a special user account that an application or service uses to interact with the Active Directory. Enter your Active Directory service account credentials in this (username) and the following (password) field.
Note
Ensure that you update the service account credentials here whenever the service account password changes or when a different service account is used.
- Service Account Password: Enter the service account password.
- When all the fields are correct, click the Save button (lower right).
- ID Firewall uses the service account for ID based security with additional requirements, see Configure Service Account for ID Firewall on page 6.
Once saved, the Referenced AD Groups section is displayed. You can add a new user group by clicking + Add User Group and edit the auto-generated Category Value. After the active directory configuration is complete, you can create the VDI Policy, see Creating a VDI Policy.
- Optionally, click Add Inclusion Criteria under Manage the VM Inclusion Criteria to specify which VMs are assigned to AD Group categories upon user logon based on VM name.
Note
It is recommend that users add inclusion criteria if at all possible to prevent any unintended categorizations.
The VMs with AppType category assigned cannot be categorized by ID Based Security.
Configure Service Account for ID Firewall¶
- Active Directory service account in Prism Central is used for connectivity with the Active Directory domain services. ID Firewall also uses the same service account for ID based security.
- To configure a service account for ID firewall, do the following.
- Create a new user in the Active Directory.
- Add the user to the Distributed COM Users group and the Event Log Readers domain groups.
- Start the dcomcnfg.exe utility and go to Component Services > Computers > My Computer > DCOM Config.
- Right-click on Windows Management and Instrumentation and select Properties from the menu.
- Switch to Security tab, select Customize option in the Access Permissions section and then click Edit.
- Add the user and grant Local Access and Remote Access permissions to the user. Click OK to confirm changes.
- Run the WMIMGMT.msc command to start Windows Management Instrumentation snap-in.
- Right-click on WMI control (local) and select Properties from the menu.
- Switch to Security tab and expand Root tree.
- Select CIMV2 in the expanded tree and click Security.
- Go to Advanced > Add > Principal and enter the user name.
- Change scope by selecting This namespace and subnamespaces in the Applies to drop-down menu.
- Click the check-box to grant the Enable Account and Remote Enable permissions. Click OK to confirm changes.
- Restart the winmgmt service.
C:> net stop winmgmt
C:> net start winmgmt
Alternatively, reboot the domain controller.
- Repeat step 3 to step 14 on every domain controller.
Takeaways¶
What are the key things you should know about Nutanix Flow?
- In this exercise you utilized Flow to quarantine a VM using the two modalities of the quarantine policy, which are strict and forensic.
- Quarantine policies are evaluated at a higher priority than application policies. A quarantine traffic can block traffic that would otherwise be allowed by an application policy.
- The forensic modality is key to allow limited access a quarantined VM while the VM is quarantined.


httpd::url(n) 1.2 "Tcl Web Server"
httpd::url - Url dispatching
package require httpd::url ?1.2?
The package httpd::url is a companion package to package
httpd and required by it. It provides the database mapping
from urls in http requests to the tcl commands implementing them, and
the commands to manipulate said database.
The main concept of this package is the domain. A domain is
described by an url prefix and handled by single tcl command, the
domain handler. In other words, a domain is an url tree,
i.e. an url directory and all urls inside of that directory
[*]. These urls are handled by the associated tcl command.
[*] There is one exception to this definition. It is possible,
actually allowed, to define a domain whose url prefix is inside of
another domain. All the urls in this sub-domain do not belong
to the enclosing domain anymore.
The commands in this section are called by the package httpd
as part of the url dispatching process. They are public for use in
implementations of the HTTP protocol different from httpd.
- Url_Dispatch sock
-
Dispatches the request currently waiting on the connection sock
to the associated domain handler. The http protocol engine has already
read the HTTP headers and placed into the connection status
array. It may have read all posted data before invoking the domain
handler. This is done if and only if requested by the domain.
Before the domain handler is invoked all registered access control
callbacks are run. If any of them denies the request an http error
reply is sent back and the domain handler is not invoked.
- Url_DeferredDispatch prefix suffix sock varname errmsg
-
Bare bones invocation of the domain handler for the url (prefix
and suffix) in the current request waiting on the connection
sock. Executed after all posted data was read by this
package. If the error message in errmssg is not empty the
request will be aborted, using this message in the generated http
error reply, and the domain handler is not invoked.
This command does not perform access control. It assumes
that this has already been done before.
- Url_PostHook sock length
-
Backdoor hack for Url_DecodeQuery compatibility. Remembers the
current connection sock and length of pending data so that
Url_DecodeQuery can read the post data if it has not already
been read by the time it is called. Setting a length of 0
deactivates the remembered information.
The commands in this section are for use by domain implementations, to
manage their presence in the dispatcher database.
- Url_PrefixInstall prefix command (option value)...
-
Adds a domain described by the url prefix to the database. After
the call any access to an url in the domain will cause this package to
call the associated domain handler, the command prefix command.
The domain handler is called with one additional argument, the channel
handle sock of the connection which made the request for an url
in the domain. The state data of this connection is available through
as described in httpd.
The allowed options and their meanings are:
- readpost
-
takes a boolean value. If set to true (the default), then this
package will retrieve post data before calling the domain
handler. Else the domain handler is responsible for reading any post
data the browser might have sent.
- callback
-
takes a command prefix. It is invokes whenever a request in the domain
was completed, with or without error. This allows the domain handler
to cleanup any resources it might have allocated for the request at
that time, like aborting a long running server operation.
The callback will be invoked with two additional arguments, sock
and a string, in this order. The string can be empty. If the string is
not empty it will contain an error message.
- thread
-
takes a boolean value. If set to true the domain handler will
run in its own thread. The default is false. In a server which
is not thread-enabled this option will be ignored and the value always
forced to false.
- Url_PrefixRemove prefix
-
Remove the domain described by the url prefix from the
database. After the call all urls in the domain may fall into a
different domain and will be handled by that domain handler. If they
don't fall into a different domain they will cause the generation of
http error replies when accessed from a browser.
- Url_AccessInstall proc
-
Adds the command with name proc at the end of the list of access
control callback managed by the package. After the call the command
will be invoked for all incoming requests. It can grant access, deny
it, or announce that it doesn't care. When calling the command
multiple times for the same proc only the first call will update
the package. All others will be ignored.
The register callback is invoked with two additional arguments, the
channel handle of the connection, and the url which is accessed. It
has to return one of
- ok
-
Access is granted.
- denied
-
Access is denied. It is recommended that the callback generates the
appropriate http error reply. However the system will work even if it
does not, by generating its own reply when it finds that the callback
did not.
- return
-
See denied.
- skip
-
The callback does not care about this url.
The package invokes the callbacks from first registered to last and
will not stop as long as the callbacks return skip. Any tcl
error thrown by a callback wil cause url processing to abort.
- Url_AccessInstallPrepend proc
-
See Url_AccessInstall, except that the command prefix is added
at the front of the list, causing it to be called before anything else
registered before.
- Url_AccessUnInstall proc
-
Removes the command prefix proc from the list of access control
callbacks managed y the package. If the command prefix could not be
found this command will do nothing.
- Url_PrefixMatch url prefixVar suffixVar
-
Finds the best-matching domain for the url and stores the url
prefix of the domain into the variable prefixVar, and the
remainder of the url (i.e. everything after the prefix) into the
variable suffixVar.
The best-matching domain is the domain with the longest prefix which
still matches the specified url, path-component wise. In other words,
the prefix /tcl will not match the url /tclhttpd/foo.
- Url_PrefixExists prefix
-
Checks if a domain was registerd for prefix. The result is a
boolean value where true signals that a domain was registered
indeed.
- Url_Handle cmd sock
-
This used to cache the domain handler command cmd for the url on
the connection sock before invoking it. Nowadays it only invokes
the command.
- Url_UnCache sock ?force?
-
Removes the domain handler command for the url on the connection
sock from the domain handler cache. If the argument force
is present and set then there will be no special case for the internal
redirect hack.
The commands of this section are for use by domain implementations, to
aid the tasks of url and request processing.
- Url_Unwind sock ei ec
-
Performs common error handling after the current request on the
connection sock was aborted with a tcl error. The two arguments
ei and ec contain the errorInfo and errorCode information
from the interpreter.
- Url_PathCheck urlsuffix
-
Validates the pathname urlsuffix and makes sure that it doesn't
sneak out of its domain via ..-trickery. Either raises an
error, or returns a list of components in the pathname.
- Url_DecodeQuery query (option value)...
-
A small wrapper around Url_DecodeQueryOnly. Ensures that the
POST data on the connection set via Url_PostHook is read before
handing over to the decoder. query is the name of the internal
variable the data is stored into. The options coming after this
information are simply handed over to the actual decoder, i.e.
Url_DecodeQueryOnly.
Accepted options:
- type
-
Forces a specific type for the query data. Defaults to
application/x-www-urlencoded. If no decoder for that type is
present the system is forced back to the default.
- qualifiers
-
Empty by default. Transformed into the second argument of the type
specific decoders, see below.
- Url_DecodeQueryOnly query (option value)...
-
Decodes the POST data stored in the variable query. It does
this by dispatching to the appropriate type-specific decoder command
(see below). See Url_DecodeQuery for the accepted options.
- Url_DecodeQuery_multipart/form-data query qualifiers
-
Decoder for query data of type multipart/form-data.
Essentially has to parse the MIME document in query, with
guidance by the dictionary qualifiers.
Used keys are
- boundary
-
The boundary line used to separate the MIME parts. Required.
Returns a dictionary mapping from the names of the uploaded files
to their contents.
- Url_DecodeQuery_application/x-www-urlencoded query qualifiers
-
Decoder for application/x-www-urlencoded query data.
The argument qualifiers is not used. Returns a dictionary
mapping from the query keys to the query values.
- Url_DecodeQuery_application/x-www-form-urlencoded query qualifiers
-
Decoder for application/x-www-form-urlencoded query
data. An alias of Url_DecodeQuery_application/x-www-urlencoded.
- Url_QuerySetup sock
-
Reads the POST data on the connection sock and initializes the
ncgi package with it, for convenient access by URL
implementations later on.
- Url_ReadPost sock varname
-
Synchronously reads the POST data on the connection sock and
stores it into the variable varname.
- Url_DecodeMIMEField type
-
Decodes a mime type. Returns a list containing 3 elements, the major
and minor type, and its qualifiers, a dictionary, in this order.
- Url_Decode data
-
Decodes a single string in x-www-urlencoded form.
The decoded string is returned as the result of the command.
- Url_Encode string
-
Encodes a string for use in x-www-urlencoded query data. The
encoded string is returned as the result of the command.
- Url_IsLinkToSelf url
-
Compares the url to the url of the current page.
The result of the comparison is a boolean flag.
If they seem to be the same true will be returned, else
false.
httpd, httpd::counter, httpd::doc_error, httpd::threadmgr, httpd::utils
domain, url, url dispatch, web server
Copyright © 2003 Andreas Kupries <andreas_kupries@users.sourceforge.net>


Overview
Creating a new theme is very easy. You need to describe window's look and feel in a CSS file. Name your CSS file THEME_NAME.css with thoses CSS definition:
By convention the images used in the CSS files are in THEME_NAME directory (it's just a convention, do it as you feel!)
A window is divided into 9 parts, 4 corners, 4 borders and the main content in the middle.
View a detail
template CSS file (you can copy-paste it to start a new theme). See
Art.Gnome.Org for cool designs. I used two of them, it's easy to integrate in the class.
/* North-West corner */
.THEME_NAME_nw {
background: transparent url(THEME_NAME/TOP_LEFT_IMAGE.gif) no-repeat 0 0;
width:10px;
height:25px;
}
/* North border */
.THEME_NAME_n {
background: transparent url(THEME_NAME/TOP_IMAGE.gif) repeat-x 0 0;
height:25px;
}
/* North-East corner */
.THEME_NAME_ne {
background: transparent url(THEME_NAME/TOP_RIGHT_IMAGE.gif) no-repeat 0 0;
width:10px;
height:25px;
}
/* West border */
.THEME_NAME_w {
background: transparent url(THEME_NAME/LEFT_IMAGE.gif) repeat-y top left;
width:7px;
}
/* East border */
.THEME_NAME_e {
background: transparent url(THEME_NAME/RIGHT_IMAGE.gif) repeat-y top right;
width:7px;
}
/* South-West corner */
.THEME_NAME_sw {
background: transparent url(THEME_NAME/BOTTOM_LEFT_IMAGE.gif) no-repeat 0 0;
width:7px;
height:7px;
}
/* South border */
.THEME_NAME_s {
background: transparent url(THEME_NAME/BOTTOM_IMAGE.gif) repeat-x 0 0;
height:7px;
}
/* South-East corner */
.THEME_NAME_se {
background: transparent url(THEME_NAME/BOTTOM_RIGHT_IMAGE.gif) no-repeat 0 0;
width:7px;
height:7px;
vertical-align:top;
}
/* Resize button */
.THEME_NAME_sizer {
width:7px;
height:7px;
background: transparent url(THEME_NAME/RESIZE_IMAGE.gif) no-repeat 0 0;
cursor:se-resize;
}
/* Close button */
.THEME_NAME_close {
width: 23px;
height: 23px;
background: transparent url(THEME_NAME/CLOSE_IMAGE.gif) no-repeat 0 0;
position:absolute;
top:0px;
right:11px;
cursor:pointer;
z-index:1000;
}
/* Minimize button */
.THEME_NAME_minimize {
width: 23px;
height: 23px;
background: transparent url(THEME_NAME/MINIMIZE_IMAGE.gif) no-repeat 0 0;
position:absolute;
top:0px;
right:55px;
cursor:pointer;
z-index:1000;
}
/* Maximize button */
.THEME_NAME_maximize {
width: 23px;
height: 23px;
background: transparent url(THEME_NAME/MAXIMIZE_IMAGE.gif) no-repeat 0 0;
position:absolute;
top:0px;
right:33px;
cursor:pointer;
z-index:1000;
}
/* Title bar */
.THEME_NAME_title {
float:left;
height:14px;
font-size:14px;
text-align:center;
margin-top:2px;
width:100%;
color:#123456;
}
/* Content div (not used for url) */
.THEME_NAME_content {
overflow:auto;
color: #000;
font-family: Tahoma, Arial, Sans Serif;
font-size: 10px;
background:#FDFDFD;
}
/* Overlay for modal window, spécify color and opacity (three times to work on all browsers */
.overlay_THEME_NAME {
background-color: #85BBEF;
filter:alpha(opacity=60);
-moz-opacity: 0.6;
opacity: 0.6;
}
Take a look to an existing CSS file like
alphacube.css or
mac_os_x.css (with PNG image and IE specific code)
Themes included in this release
- Default ()
- MacShadow ()
- Nuncio (from Brice Joly) ()
- Alphacube from Art.Gnome.Org ()
- Spread (Alphacube with a different color scheme) ()
- DarkX from Art.Gnome.Org ()
- Default dialog ()
- Alphacube as dialog ()


Chapter 4 Starting with Data
4 Learning Objectives
- Describe what a data frame is.
- Load external data from a .csv file into a data frame.
- Summarize the contents of a data frame.
- Format dates.
4.1 Presentation of the Survey Data
We are studying the species repartition and weight of animals caught in plots in our study area. The dataset is stored as a comma separated value (CSV) file. Each row holds information for a single animal, and the columns represent:
| Column | Description |
|---|---|
| record_id | Unique id for the observation |
| month | month of observation |
| day | day of observation |
| year | year of observation |
| plot_id | ID of a particular plot |
| species_id | 2-letter code |
| sex | sex of animal (“M”, “F”) |
| hindfoot_length | length of the hindfoot in mm |
| weight | weight of the animal in grams |
| genus | genus of animal |
| species | species of animal |
| taxon | e.g. Rodent, Reptile, Bird, Rabbit |
| plot_type | type of plot |
We are going to use the R function download.file()
to download the CSV file that contains the survey data from figshare, and we will use read_csv()
to load into memory the content of the CSV file as an object of class data.frame
. Inside the download.file command, the first entry is a character string with the source URL (“https://ndownloader.figshare.com/files/2292169”). This source URL downloads a CSV file from figshare. The text after the comma (“data/portal_data_joined.csv”) is the destination of the file on your local machine. You’ll need to have a folder on your machine called “data” where you’ll download the file. So this command downloads a file from figshare, names it “portal_data_joined.csv,” and adds it to a preexisting folder named “data.”
library(tidyverse)
download.file(url="https://ndownloader.figshare.com/files/2292169",
destfile = "data/portal_data_joined.csv"))
You are now ready to load the data:
surveys <- read_csv("data/portal_data_joined.csv")
#> Parsed with column specification:
#> cols(
#> record_id = col_integer(),
#> month = col_integer(),
#> day = col_integer(),
#> year = col_integer(),
#> plot_id = col_integer(),
#> species_id = col_character(),
#> sex = col_character(),
#> hindfoot_length = col_integer(),
#> weight = col_integer(),
#> genus = col_character(),
#> species = col_character(),
#> taxa = col_character(),
#> plot_type = col_character()
#> )
This statement doesn’t produce any output because, as you might recall, assignments don’t display anything. If we want to check that our data has been loaded, we can see the contents of the data frame by typing its name: surveys
.
Wow… that was a lot of output. At least it means the data loaded properly. Let’s check the top (the first 6 lines) of this data frame using the function head()
:
head(surveys)
#> # A tibble: 6 x 13
#> record_id month day year plot_id species_id sex hindfoot_length
#> <int> <int> <int> <int> <int> <chr> <chr> <int>
#> 1 1 7 16 1977 2 NL M 32
#> 2 72 8 19 1977 2 NL M 31
#> 3 224 9 13 1977 2 NL <NA> NA
#> 4 266 10 16 1977 2 NL <NA> NA
#> 5 349 11 12 1977 2 NL <NA> NA
#> 6 363 11 12 1977 2 NL <NA> NA
#> # ... with 5 more variables: weight <int>, genus <chr>, species <chr>,
#> # taxa <chr>, plot_type <chr>
## Try also
## View(surveys)
4.2 What are data frames?
Data frames are the de facto data structure for most tabular data, and what we use for statistics and plotting.
A data frame can be created by hand, but most commonly they are generated by the functions read_csv()
or read.table()
; in other words, when importing spreadsheets from your hard drive (or the web).
A data frame is the representation of data in the format of a table where the columns are vectors that all have the same length. Because columns are vectors, each column must contain a single type of data (e.g., characters, integers, factors). For example, here is a figure depicting a data frame comprising a numeric, a character, and a logical vector.
We can see this when inspecting the structure of a data frame with the function str()
:
str(surveys)
4.3 Inspecting data.frame
Objects
We already saw how the functions head()
and str()
can be useful to check the content and the structure of a data frame. Here is a non-exhaustive list of functions to get a sense of the content/structure of the data. Let’s try them out!
- Size:
dim(surveys)
- returns a vector with the number of rows in the first element, and the number of columns as the second element (the dimensions of the object)nrow(surveys)
- returns the number of rowsncol(surveys)
- returns the number of columns
- Content:
head(surveys)
- shows the first 6 rowstail(surveys)
- shows the last 6 rows
- Names:
names(surveys)
- returns the column names (synonym ofcolnames()
fordata.frame
objects)rownames(surveys)
- returns the row names
- Summary:
str(surveys)
- structure of the object and information about the class, length and content of each columnsummary(surveys)
- summary statistics for each column
Note: most of these functions are “generic”, they can be used on other types of objects besides data.frame
.
4.3 Challenge
Based on the output of
str(surveys)
, can you answer the following questions?
- What is the class of the object
surveys
?- How many rows and how many columns are in this object?
- How many species have been recorded during these surveys?
 Row numbers come first, followed by column numbers. However, note that different ways of specifying these coordinates lead to results with different classes.
# first element in the first column of the data frame (as a vector)
surveys[1, 1]
# first element in the 6th column (as a vector)
surveys[1, 6]
# first column of the data frame (as a vector)
surveys[, 1]
# first column of the data frame (as a data.frame)
surveys[1]
# first three elements in the 7th column (as a vector)
surveys[1:3, 7]
# the 3rd row of the data frame (as a data.frame)
surveys[3, ]
# equivalent to head_surveys <- head(surveys)
head_surveys <- surveys[1:6, ]
:
is a special function that creates numeric vectors of integers in increasing or decreasing order, test 1:10
and 10:1
for instance.
You can also exclude certain indices of a data frame using the “-
” sign:
surveys[, -1] # The whole data frame, except the first column
surveys[-c(7:34786), ] # Equivalent to head(surveys)
Data frames can be subset by calling indices (as shown previously), but also by calling their column names directly:
surveys["species_id"] # Result is a data.frame
surveys[, "species_id"] # Result is a vector
surveys[["species_id"]] # Result is a vector
surveys$species_id # Result is a vector
In RStudio, you can use the autocompletion feature to get the full and correct names of the columns.
4.5 Formatting Dates
This next section is taken from Chapter 16 of Hadley Wickham and Garrett Grolemund’s book R for Data Science which is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 license.
4.5.1 Introduction
This chapter will show you how to work with dates and times in R. At first glance, dates and times seem simple.  However, the more you learn about dates and times, the more complicated they seem to get. To warm up, try these three seemingly simple questions:
Does every year have 365 days? Does every day have 24 hours? Does every minute have 60 seconds? I’m sure you know that not every year has 365 days, but do you know the full rule for determining if a year is a leap year? (It has three parts.) You might have remembered that many parts of the world use daylight savings time (DST), so that some days have 23 hours, and others have 25. You might not have known that some minutes have 61 seconds because every now and then leap seconds are added because the Earth’s rotation is gradually slowing down.
Dates and times are hard because they have to reconcile two physical phenomena (the rotation of the Earth and its orbit around the sun) with a whole raft of geopolitical phenomena including months, time zones, and DST. This chapter won’t teach you every last detail about dates and times, but it will give you a solid grounding of practical skills that will help you with common data analysis challenges.
4.5.2 Prerequisites
This chapter will focus on the lubridate package, which makes it easier to work with dates and times in R. lubridate is not part of core tidyverse because you only need it when you’re working with dates/times. We will also need nycflights13 for practice data.
library(tidyverse)
library(lubridate)
#> Warning: package 'lubridate' was built under R version 3.4.4
#install.packages('nycflights13')
library(nycflights13)
#> Warning: package 'nycflights13' was built under R version 3.4.4
4.6 Creating date/times
There are three types of date/time data that refer to an instant in time:
A date. Tibbles print this as
<date>
.A time within a day. Tibbles print this as
<time>
.A date-time is a date plus a time: it uniquely identifies an instant in time (typically to the nearest second). Tibbles print this as
<dttm>
. Elsewhere in R these are called POSIXct, but I don’t think that’s a very useful name.
In this chapter we are only going to focus on dates and date-times as R doesn’t have a native class for storing times. If you need one, you can use the hms package.
You should always use the simplest possible data type that works for your needs. That means if you can use a date instead of a date-time, you should. Date-times are substantially more complicated because of the need to handle time zones, which we’ll come back to at the end of the chapter.
To get the current date or date-time you can use today()
or now()
:
today()
now()
Otherwise, there are three ways you’re likely to create a date/time:
- From a string.
- From individual date-time components.
- From an existing date/time object.
They work as follows.
4.6.1 From strings
Date/time data often comes as strings. You’ve seen one approach to parsing strings into date-times in date-times. Another approach is to use the helpers provided by lubridate. They automatically work out the format once you specify the order of the component. To use them, identify the order in which year, month, and day appear in your dates, then arrange “y”, “m”, and “d” in the same order. That gives you the name of the lubridate function that will parse your date. For example:
ymd("2017-01-31")
mdy("January 31st, 2017")
dmy("31-Jan-2017")
These functions also take unquoted numbers. This is the most concise way to create a single date/time object, as you might need when filtering date/time data. ymd()
is short and unambiguous:
ymd(20170131)
ymd()
and friends create dates. To create a date-time, add an underscore and one or more of “h”, “m”, and “s” to the name of the parsing function:
ymd_hms("2017-01-31 20:11:59")
mdy_hm("01/31/2017 08:01")
You can also force the creation of a date-time from a date by supplying a timezone:
ymd(20170131, tz = "UTC")
4.6.2 From other types
You may want to switch between a date-time and a date. That’s the job of as_datetime()
and as_date()
:
as_datetime(today())
as_date(now())
Sometimes you’ll get date/times as numeric offsets from the “Unix Epoch”, 1970-01-01. If the offset is in seconds, use as_datetime()
; if it’s in days, use as_date()
.
as_datetime(60 * 60 * 10)
as_date(365 * 10 + 2)
4.6.3 Exercises
What happens if you parse a string that contains invalid dates?
ymd(c("2010-10-10", "bananas"))
What does the
tzone
argument totoday()
do? Why is it important?Use the appropriate lubridate function to parse each of the following dates:
d1 <- "January 1, 2010" d2 <- "2015-Mar-07" d3 <- "06-Jun-2017" d4 <- c("August 19 (2015)", "July 1 (2015)") d5 <- "12/30/14" # Dec 30, 2014
4.7 Date-time components
Now that you know how to get date-time data into R’s date-time data structures, let’s explore what you can do with them. This section will focus on the accessor functions that let you get and set individual components. The next section will look at how arithmetic works with date-times.
4.7.1 Getting components
You can pull out individual parts of the date with the accessor functions year()
, month()
, mday()
(day of the month), yday()
(day of the year), wday()
(day of the week), hour()
, minute()
, and second()
.
datetime <- ymd_hms("2016-07-08 12:34:56")
year(datetime)
month(datetime)
mday(datetime)
yday(datetime)
wday(datetime)
For month()
and wday()
you can set label = TRUE
to return the abbreviated name of the month or day of the week. Set abbr = FALSE
to return the full name.
month(datetime, label = TRUE)
wday(datetime, label = TRUE, abbr = FALSE)
4.8 Time spans
Next you’ll learn about how arithmetic with dates works, including subtraction, addition, and division. Along the way, you’ll learn about three important classes that represent time spans:
- durations, which represent an exact number of seconds.
- periods, which represent human units like weeks and months.
- intervals, which represent a starting and ending point.
4.8.1 Durations
In R, when you subtract two dates, you get a difftime object:
# How old is Hadley?
h_age <- today() - ymd(19791014)
h_age
For more see R for Data Science.


public class RequestManager
extends android.content.BroadcastReceiver
| Modifier and Type | Method and Description |
|---|---|
void |
executeLogTask()
the device has come back online, run all requests queued when
we were offline.
|
static RequestManager |
getInstance() |
void |
invokeRequest(android.content.Context ctx,
Request request)
Deprecated.
|
void |
invokeRequest(Request request)
activities should call this method when wanting to
execute a new request.
|
void |
onReceive(android.content.Context context,
android.content.Intent intent)
onReceive,
called when connectivity status changes.
|
void |
setContext(android.content.Context ctx) |
abortBroadcast, clearAbortBroadcast, getAbortBroadcast, getDebugUnregister, getResultCode, getResultData, getResultExtras, goAsync, isInitialStickyBroadcast, isOrderedBroadcast, peekService, setDebugUnregister, setOrderedHint, setResult, setResultCode, setResultData, setResultExtras
public static RequestManager getInstance()
public void invokeRequest(Request request)
request
- the request object with instructions on
how to execute the request.@Deprecated public void invokeRequest(android.content.Context ctx, Request request)
ctx
- request
- public void onReceive(android.content.Context context, android.content.Intent intent)
onReceive
in class android.content.BroadcastReceiver
context
- context when connectivity changesintent
- broadcast intent sent by android sys.public void executeLogTask()
public void setContext(android.content.Context ctx)


Actions, resources, and condition keys for AWS Security Token Service
AWS Security Token Service (service prefix:
sts
) provides the following service-specific resources, actions, and condition context keys for use in IAM permission policies.
References:
-
Learn how to configure this service .
-
View a list of the API operations available for this service .
-
Learn how to secure this service and its resources by using IAM permission policies.
Topics
Actions defined by AWS Security Token Service
You can specify the following actions in the
Action
element of an IAM policy statement. Use policies to grant permissions to perform an operation in AWS. When you use an action in a policy, you usually allow or deny access to the API operation or CLI command with the same name. However, in some cases, a single action controls access to more than one operation. Alternatively, some operations require several different actions.
The
Resource types
column of the Actions table indicates whether each action supports resource-level permissions. If there is no value for this column, you must specify all resources ("*") to which the policy applies in the
Resource
element of your policy statement. If the column includes a resource type, then you can specify an ARN of that type in a statement with that action. If the action has one or more required resources, the caller must have permission to use the action with those resources. Required resources are indicated in the table with an asterisk (*). If you limit resource access with the
Resource
element in an IAM policy, you must include an ARN or pattern for each required resource type. Some actions support multiple resource types. If the resource type is optional (not indicated as required), then you can choose to use one of the optional resource types.
The
Condition keys
column of the Actions table includes keys that you can specify in a policy statement's
Condition
element. For more information on the condition keys that are associated with resources for the service, see the
Condition keys
column of the Resource types table.
For details about the columns in the following table, see Actions table .
| Actions | Description | Access level | Resource types (*required) | Condition keys | Dependent actions |
|---|---|---|---|---|---|
| AssumeRole | Grants permission to obtain a set of temporary security credentials that you can use to access AWS resources that you might not normally have access to | Write | |||
| AssumeRoleWithSAML | Grants permission to obtain a set of temporary security credentials for users who have been authenticated via a SAML authentication response | Write | |||
|
saml:eduorgidentityauthnpolicyuri saml:edupersonprimaryaffiliation saml:edupersonprimaryorgunitdn |
|||||
| AssumeRoleWithWebIdentity | Grants permission to obtain a set of temporary security credentials for users who have been authenticated in a mobile or web application with a web identity provider | Write | |||
|
cognito-identity.amazonaws.com:amr cognito-identity.amazonaws.com:aud |
|||||
| DecodeAuthorizationMessage | Grants permission to decode additional information about the authorization status of a request from an encoded message returned in response to an AWS request | Write | |||
| GetAccessKeyInfo | Grants permission to obtain details about the access key id passed as a parameter to the request | Read | |||
| GetCallerIdentity | Grants permission to obtain details about the IAM identity whose credentials are used to call the API | Read | |||
| GetFederationToken | Grants permission to obtain a set of temporary security credentials (consisting of an access key ID, a secret access key, and a security token) for a federated user | Read | |||
| GetServiceBearerToken [permission only] | Grants permission to obtain a STS bearer token for an AWS root user, IAM role, or an IAM user | Read | |||
| GetSessionToken | Grants permission to obtain a set of temporary security credentials (consisting of an access key ID, a secret access key, and a security token) for an AWS account or IAM user | Read | |||
| SetSourceIdentity [permission only] | Grants permission to set a source identity on a STS session | Write | |||
| TagSession [permission only] | Grants permission to add tags to a STS session | Tagging | |||
Resource types defined by AWS Security Token Service
The following resource types are defined by this service and can be used in the
Resource
element of IAM permission policy statements. Each action in the
Actions table
identifies the resource types that can be specified with that action. A resource type can also define which condition keys you can include in a policy. These keys are displayed in the last column of the table. For details about the columns in the following table, see
Resource types table
.
Condition keys for AWS Security Token Service
AWS Security Token Service defines the following condition keys that can be used in the
Condition
element of an IAM policy. You can use these keys to further refine the conditions under which the policy statement applies. For details about the columns in the following table, see
Condition keys table
.
To view the global condition keys that are available to all services, see Available global condition keys .
| Condition keys | Description | Type |
|---|---|---|
| accounts.google.com:aud | Filters access by the Google application ID | String |
| accounts.google.com:oaud | Filters access by the Google audience | String |
| accounts.google.com:sub | Filters access by the subject of the claim (the Google user ID) | String |
| aws:RequestTag/${TagKey} | Filters access by the tags that are passed in the request | String |
| aws:ResourceTag/${TagKey} | Filters access by the tags associated with the resource | String |
| aws:TagKeys | Filters access by the tag keys that are passed in the request | ArrayOfString |
| cognito-identity.amazonaws.com:amr | Filters access by the login information for Amazon Cognito | String |
| cognito-identity.amazonaws.com:aud | Filters access by the Amazon Cognito identity pool ID | String |
| cognito-identity.amazonaws.com:sub | Filters access by the subject of the claim (the Amazon Cognito user ID) | String |
| graph.facebook.com:app_id | Filters access by the Facebook application ID | String |
| graph.facebook.com:id | Filters access by the Facebook user ID | String |
| iam:ResourceTag/${TagKey} | Filters access by the tags that are attached to the role that is being assumed | String |
| saml:aud | Filters access by the endpoint URL to which SAML assertions are presented | String |
| saml:cn | Filters access by the eduOrg attribute | ArrayOfString |
| saml:commonName | Filters access by the commonName attribute | String |
| saml:doc | Filters access by on the principal that was used to assume the role | String |
| saml:eduorghomepageuri | Filters access by the eduOrg attribute | ArrayOfString |
| saml:eduorgidentityauthnpolicyuri | Filters access by the eduOrg attribute | ArrayOfString |
| saml:eduorglegalname | Filters access by the eduOrg attribute | ArrayOfString |
| saml:eduorgsuperioruri | Filters access by the eduOrg attribute | ArrayOfString |
| saml:eduorgwhitepagesuri | Filters access by the eduOrg attribute | ArrayOfString |
| saml:edupersonaffiliation | Filters access by the eduPerson attribute | ArrayOfString |
| saml:edupersonassurance | Filters access by the eduPerson attribute | ArrayOfString |
| saml:edupersonentitlement | Filters access by the eduPerson attribute | ArrayOfString |
| saml:edupersonnickname | Filters access by the eduPerson attribute | ArrayOfString |
| saml:edupersonorgdn | Filters access by the eduPerson attribute | String |
| saml:edupersonorgunitdn | Filters access by the eduPerson attribute | ArrayOfString |
| saml:edupersonprimaryaffiliation | Filters access by the eduPerson attribute | String |
| saml:edupersonprimaryorgunitdn | Filters access by the eduPerson attribute | String |
| saml:edupersonprincipalname | Filters access by the eduPerson attribute | String |
| saml:edupersonscopedaffiliation | Filters access by the eduPerson attribute | ArrayOfString |
| saml:edupersontargetedid | Filters access by the eduPerson attribute | ArrayOfString |
| saml:givenName | Filters access by the givenName attribute | String |
| saml:iss | Filters access by on the issuer, which is represented by a URN | String |
| saml:mail | Filters access by the mail attribute | String |
| saml:name | Filters access by the name attribute | String |
| saml:namequalifier | Filters access by the hash value of the issuer, account ID, and friendly name | String |
| saml:organizationStatus | Filters access by the organizationStatus attribute | String |
| saml:primaryGroupSID | Filters access by the primaryGroupSID attribute | String |
| saml:sub | Filters access by the subject of the claim (the SAML user ID) | String |
| saml:sub_type | Filters access by the value persistent, transient, or the full Format URI | String |
| saml:surname | Filters access by the surname attribute | String |
| saml:uid | Filters access by the uid attribute | String |
| saml:x500UniqueIdentifier | Filters access by the uid attribute | String |
| sts:AWSServiceName | Filters access by the service that is obtaining a bearer token | String |
| sts:ExternalId | Filters access by the unique identifier required when you assume a role in another account | String |
| sts:RoleSessionName | Filters access by the role session name required when you assume a role | String |
| sts:SourceIdentity | Filters access by the source identity that is passed in the request | String |
| sts:TransitiveTagKeys | Filters access by the transitive tag keys that are passed in the request | ArrayOfString |
| www.amazon.com:app_id | Filters access by the Login with Amazon application ID | String |
| www.amazon.com:user_id | Filters access by the Login with Amazon user ID | String |


Click and drag within the box above to create all sorts of interesting particle systems. When 'Particle' is selected from the drop down menu, click and drag to shoot particles. When 'Well' is selected, click and drag to create wells of different sizes (the larger the well the stronger the force).
This just a simple physics simulator that models particles (that have velocities) and wells (which apply 'gravitational' forces). It should also be noted this isn't exactly a true N-Bodies particle system as the individual particles do not have any effect on one another.
In this system there is a one way interaction between Wells and Particles. Each well exerts a force that is inverse proportional to the distance from its center (Force = 1/Distance). This means the further away a particle is from a well the less force it feels, and the closer a particle is the greater the force. As well, when multiple Wells are involved the forces are just summed up. Meaning that each particle really only experiences a single force which is just a sum of all the forces from all the wells. Pretty neat hey?
In order to create the system as accurately as possible I created two types of objects, Wells and Particles of course. Both of these are then managed in a larger object, a particle system, which keeps track of all the objects and their interactions.
This simulation is running at 32 frames/second, meaning that every 0.03125 seconds everything is recalculated and the display is refreshed. In this time the particle system goes through every single particle and adds up all the forces from all the wells then plugs them into an equation that updates the positions of each particle. Not the most efficient solution but it certainly does the job.
When you don't have 'Well Collision' on, you'll notice that sometimes when the particles enter inside a Well that they come shooting out with a extremely high velocity. This is due to the fact that the force is inverse proportional to the distance (as mentioned above). So if the particles distance from the center of the mass is very tiny, the force is going to be huge. This in turn causes the well to fling the particles out.


This is Words and Buttons Online — a collection of interactive #tutorials, #demos, and #quizzes about #mathematics, #algorithms and #programming.
Quite a few programming languages were already invented in the 21st century. Swift, Kotlin, and Go are probably among the most popular. However, the distinct feature of the 21st-century language design is the absence of any distinct features in the languages themselves. The best thing about any of these is that you can spend a weekend and claim to learn a shiny new thing without actually learning anything new. They don’t have anything new in them at all; they are all made by the “something done right” formula, this something being Objective-C, Java or C.
While “not being new” is indeed a valuable trait in its own right, the question arises. Are they indeed the languages for the 21st century, or are they merely the reflection on the 20th-century bad programming habits?
If I were to invent a language, I wouldn’t try to fix the past. I would try to invent a thing that not only works well in the reality of the modern world but can also evolve properly and stand the test of time. If this requires radical design decisions, so be it.
Modern languages syntaxes reflect the freedom of chalk and blackboard put into the shackles of ASCII. While some elements of notation like arithmetical signs and brackets are more or less idiomatic, some are just made up for no reason at all apart from saving the effort of pressing teletype buttons.
Typing is not an issue anymore. We are not obliged to play guess with our syntax. Things like this (($:@(<#[), (=#[), $:@(>#[)) ({~ ?@#)) ^: (1<#) are indeed concise and expressive. And also fun to write. *
But they do not help readability and, what’s even more critical, googleability and stackoverflowability.
The same goes for cryptic function names, return code conventions, and attributes with obscure meaning. They served us well in the past, saving our punch-card space, now they deserve retirement.
Ultimately this:
FILE * test_file = fopen(“/tmp/test.txt”, “w+”); |
Should become something like this:
create file /tmp/test.txt for input and output as test_file |
We don’t need all that brackets, quotes, asterisks, and semicolons (unless they really help us to express things better). Syntax highlighting should work instead of syntax notation just fine.
Things that are cheap in the 21st century: parsing time, computer memory, online search. Things that are not: development time, programmer’s memory, effort spent online learning the language specifics. This type of writing should facilitate the usage of cheaper things over the more expensive ones.
You probably know this as one of the JavaScript wats.
> 10.8 / 100 0.10800000000000001 |
It isn’t, of course, JavaScript specific. In fact, it is not a wat at all, it is a perfectly correct behavior backed by the well-respected IEEE 754 standard. It’s just how floating-point numbers are implemented in almost any architecture. And it’s actually not that bad considering we are trying to squeeze an infinite amount of real numbers into 32, 64 or even 256 bits.
What mathematicians consider impossible, engineers do by trading off sanity for possibility. IEEE floating-point numbers are not, in fact, numbers at all. Maths requires real numbers' addition to have associativity. Floats and doubles do not always hold this property. Maths requires real numbers to include all the integers. This is not true even for the same sized float and uint32_t. Maths requires real numbers to have a zero element. Well, at least in this regard IEEE standard exceed the expectations, as floating-point numbers have two zero elements instead of one.
And it’s not only about floating-point numbers. Native integers are not much better. Do you know what happens when you add up two 16-bit numbers like that?
0xFFFF + 0x0001
|
Well, nobody knows actually. Intuition tells, that the overflowed number should be 0x0000. But this is not specified by any worldwide standard; it’s just how it usually goes with C and with x86-family processors. It may also result in 0xFFFF, or trigger an interrupt, or store some special bit in a special place signaling that the overflow happened.
It is not specified at all. It differs. While floating-point numbers are just standard insane, these are entirely unpredictable.
What I would propose for numeric computations instead is fixed point arbitrary sized data types with standard defined behavior on underflow, overflow, and precision loss. Something like this:
1.000 / 3.000 = 0.333 0001 + 9999 = overflowed 9999 0.001 / 2 = underflowed 0 |
Of course, you don’t have to actually write all the trailing zeros, they should be implied by the data type definition. But you should be able to select your maximum and minimum bounds for the type yourself, not just rely on the current processor's architecture.
Wouldn’t it work much slower then? Yes, it would. But realistically, how often do you have to program high-performance computations? I suppose, unless you work in a narrow field of research and engineering that requires exactly that, not very often. And if you do, you have to use specialized hardware and compilers anyway. I’ll just presume, a typical 21st-century programmer don't have to solve differential equations very often.
That being said, shouldn’t fast, complex and unpredictable native types from the past be an option and not the default?
There are brilliant wonderful languages designed not to do the task, but to create languages that do the task. Racket, Rebol, and Forth to name a few.  But as you might guess, being fun is not exactly what makes a language universally popular.
Language leverage, the ability to create new sub-languages for the task, is a great power, and it pays vastly to have it when you work in research all on your own. Unfortunately, if you write code for other people to understand, you have to teach them your language along with the code. And that’s when it gets ugly.
People are generally interested in getting things done, not learning the language they’d have to forget anyway after the things are done. For other people, learning your language is just an effort that would hardly pay off. Learning something common and standardized, however, is an investment for life. Therefore, people will rather reinvent your language themselves than learn it. And there you go: countless dialects for the single domain; people arguing about aesthetics, ideology, architecture and all the things that are irrelevant; million lines of code being written just to be forgotten in months.
Lisp guys went through all of that in the 80s. They figured out that the more of the practical part of a language is standardized — the better. And they came up with Common Lisp.
And it’s huge. The INCITS 226–1994 standard consists of 1153 pages. This was only beaten by C++ ISO/IEC 14882:2011 standard with 1338 pages some 17 years after. C++ has to drag a bag of heritage though, it was not always that big. Common Lisp was created huge from the scratch.
A programming language should not be that huge. Not at all. It’s just that it should have a decent standard library filled with all the goodies so people wouldn't have to reinvent them.
It is difficult to balance hugeness and applicability. We had to learn this with C++ the hard way. I think, to balance things properly, the language for the 21st century should be more domain specific than not. Since business applications are currently the biggest mess, perhaps it should address that and not some game development or web-design.
The language for the 21st century should be business oriented, English-like and not dependent on native types.
The most exciting thing, we already have the language exactly like this! What do you think it is?
| Index #programming | ← there's more. |
+
So You Think You Know C (free book) + Geometry for Programmers (paid book) + Github & RSS |


{% extends 'seanWebapp/base.html' %}
{% load static %}
{% block stylesheets %}
{% endblock %}
{% block title %}
SEAN Public Resources
{% endblock %}
{% block textblock %}
About:
This is the public resources page.
Help:
You can view all resources relating to the Social and Public Policy courses and general university information here.
To view a file simpley click on the resource name and it will be downloaded to your machine.


Stoffel Vandoorne bumped up to Formula E podium after penalty
by Nicolás Quarles van UffordAs BMW-Andretti driver Maximilian Guenther was given a time penalty after the Diriyah e-Prix, former McLaren driver Stoffel Vandoorne was bumped up to the podium places at the first race weekend of the Formula E season.
Guenther was found guilty of overtaking under yellow flag conditions, getting past Lucas di Grassi while the Safety Car was still out. The 22-year-old finished ahead of di Grassi in second place but was given a total of 24 seconds' worth of penalties, not only denying him his first-ever FE podium but dropping him outside of the points altogether.
As for Alex Sims, Guenther's teammate, he dominated the e-Prix from start to finish, getting pole position and taking the flag at the end of the afternoon in Saudi Arabia.
Vandoorne, who has paired up with F2 champion Nyck de Vries at Mercedes' new works team, therefore got his second podium of the weekend as he has looked incredibly impressive so far.


class BingAdsApi::AccountInfo
Public : Define an account info
- Author
-
<EMAIL_ADDRESS>Examples
campaign = BingAdsApi::AccountInfo.new( :account_life_cycle_status => BingAdsApi::AccountsInfo::DRAFT :name => "Account Name", :number => 1234567, :pause_reason => "1") # => <BingAdsApi::AccountInfo>
Attributes
account_life_cycle_status[RW]
id[RW]
name[RW]
number[RW]
pause_reason[RW]
Public Instance Methods
active?()
click to toggle source
- Public
-
Returns true if the account is in status active
- Author
-
<EMAIL_ADDRESS>- Returns
-
boolean
# File lib/bing-ads-api/data/accounts_info.rb, line 25 def active? return account_life_cycle_status == ACTIVE end
draft?()
click to toggle source
- Public
-
Returns true if the account is in status draft
- Author
-
<EMAIL_ADDRESS>- Returns
-
boolean
# File lib/bing-ads-api/data/accounts_info.rb, line 35 def draft? return account_life_cycle_status == DRAFT end
inactive?()
click to toggle source
- Public
-
Returns true if the account is in status inactive
- Author
-
<EMAIL_ADDRESS>- Returns
-
boolean
# File lib/bing-ads-api/data/accounts_info.rb, line 45 def inactive? return account_life_cycle_status == INACTIVE end
pause?()
click to toggle source
- Public
-
Returns true if the account is in status pause
- Author
-
<EMAIL_ADDRESS>- Returns
-
boolean
# File lib/bing-ads-api/data/accounts_info.rb, line 55 def pause? return account_life_cycle_status == PAUSE end
pending?()
click to toggle source
- Public
-
Returns true if the account is in status pending
- Author
-
<EMAIL_ADDRESS>- Returns
-
boolean
# File lib/bing-ads-api/data/accounts_info.rb, line 65 def pending? return account_life_cycle_status == PENDING end


Sends or receives files from a GigE Vision video interface using the TFTP protocol. More...
Public Member Functions | |
| PvTftpClient () | |
| Constructor. | |
| ~PvTftpClient () | |
| Destructor. | |
| PvResult | Init (const PvString &aDeviceIPAddress, const PvString &aDeviceFilename) |
| Initializes the client for file transfer. More... | |
| PvResult | SendFile (const PvString &aHostFilename="") |
| Sends a local file to the device using TFTP. More... | |
| PvResult | SendData (const uint8_t *aBuffer, uint32_t aBufferLength) |
| Sends data to a device file using TFTP. More... | |
| PvResult | GetFile (const PvString &aHostFilename="") |
| Reads a file from the device using TFTP. More... | |
| PvResult | GetData (uint8_t *aBuffer, uint32_t aBufferLength, uint32_t *aBytesRead) |
| Gets data from a device file using TFTP. More... | |
| PvResult | Abort () |
| Aborts the current transfer. More... | |
| PvResult | GetWarning (PvString &aWarning) |
| Pops the oldest transfer warning and returns it in aStatus. More... | |
| PvResult | GetTransferResult () const |
| Returns the last error message. More... | |
| PvResult | GetProgress (int64_t &aCompleted, int64_t &aTotal) |
| Returns the transfer progress. More... | |
Sends or receives files from a GigE Vision video interface using the TFTP protocol.
Init must first be called in order to specify the device IP address and file.
SendFile/SendData are used to send a host file or memory buffer to the device file. ReceiveFile/ReceiveData are used to transfer a device file to a host file or memory buffer.
SendFile and ReceiveFile are blocking calls. Another thread can poll GetWarning, GetTransferResult and GetProgress to provide the user with status updates.
Calling Abort from another thread aborts the current transfer.
| PvResult PvTftpClient::Abort | ( | ) |
Aborts the current transfer.
As the send and receive methods are blocking, this one needs to be called from a different thread.
| PvResult PvTftpClient::GetData | ( | uint8_t * | aBuffer, |
| uint32_t | aBufferLength, | ||
| uint32_t * | aBytesRead | ||
| ) |
Gets data from a device file using TFTP.
| [in] | aBuffer | pointer to the buffer where the data is written. |
| [in] | aBufferLength | the size of the buffer in bytes. |
| [in] | aBytesRead | output, the number of bytes read from the device file into aBuffer in bytes. |
Reads a file from the device using TFTP.
| [in] | aHostFilename | if provided, the file read from the device is written to that location. If not provided, the file is written to aDeviceFilename (from Init) in the current working directory. |
| PvResult PvTftpClient::GetProgress | ( | int64_t & | aCompleted, |
| int64_t & | aTotal | ||
| ) |
Returns the transfer progress.
| [out] | aCompleted | how many bytes have been transferred. |
| [out] | aTotal | size of the transfer in bytes. |
| PvResult PvTftpClient::GetTransferResult | ( | ) | const |
Returns the last error message.
Pops the oldest transfer warning and returns it in aStatus.
| [in] | aWarning | the last warning. |
Initializes the client for file transfer.
| [in] | aDeviceIPAddress | the IP address of the device to transfer to/from. |
| [in] | aDeviceFilename | the name device-side filename written to or read from the device. |
| PvResult PvTftpClient::SendData | ( | const uint8_t * | aBuffer, |
| uint32_t | aBufferLength | ||
| ) |
Sends data to a device file using TFTP.
| [in] | aBuffer | pointer to the buffer containing the data to send. |
| [in] | aBufferLength | the size of the buffer, in bytes. |
Sends a local file to the device using TFTP.
| [in] | aHostFilename | if provided, the name of the local file to write to the device. If not provided, the aDeviceFilename (from Init) from the current working directory is sent to the device. |
Copyright (c) 2002-2015 Pleora Technologies Inc.
www.pleora.com


About Me
A writing and advertising graduate of Metropolitan State University, I now work in the commercial underwriting sector as an International Underwriting Associate for Berkley Technology Underwriters. Recently (very recently) I started studying computer programming at the University of Minnesota, to try and learn how to write software. Upon completion I will have experience in writing software, risk, & advertisements. Sadly none of these fields are related or correlate whatsoever. I may have wanted for direction in my earlier professional years, but I have always had an eagerness to learn and grow. I love learning new things, and enjoy new situations and environments. I am not afraid to grab the bull by the horns! Assuming I am not actually confronted with a fully grown, un-castrated & agitated steer.
In my spare time I like to spend time with my dog & cat, read (Harry Potter), collect idioms, try new things, and watch anything fantasy or sci-fi. I also love to exercise. I have completed several half-marathons, mini triathlons and - only one - full marathon. Someday I hope to scuba dive the great barrier reef and walk the Camino de Santiago. Cheers!


Favored Building Blocks
{% chart id="primary-building-blocks" managerid="building-blocks-search" %}
Most Mined Blocks
{% chart id="primary-mining-blocks" managerid="mining-blocks-search" %}
Most Hunted Mobs
{% chart id="mob-kills-chart" managerid="mob-kills-search" %}
Player Deaths
{% chart id="player-kills-chart" managerid="player-kills-search" %}


The basics Mispellings and grammatical errors can effect your credibility. The same goes for misused commas, and other types of punctuation . Not only will Grammarly underline these issues in red, it will also showed you how to correctly write the sentence. Underlines that are blue indicate that Grammarly has spotted a sentence that is unnecessarily wordy. You'll find suggestions that can possibly help you revise a wordy sentence in an effortless manner. But wait...there's more? Grammarly can give you very helpful feedback on your writing. Passive voice can be fixed by Grammarly, and it can handle classical word-choice mistakes. It can even help when you wanna refine ur slang or formality level. That's especially useful when writing for a broad audience ranging from businessmen to friends and family, don't you think? It'll inspect your vocabulary carefully and suggest the best word to make sure you don't have to analyze your writing too much.


Homemade Deodorant
Make your own deodorant in under 15 minutes
About
Who we are
What we're doing
Why we're doing it.


Analyses if a callable parameter can be defined with the 'array' type.
Refactoring can affect class inheritance and test coverage should be verified before making changes.


Email tab
Tabs allow you to select which message to display.
See also:
How do I use it?
Opening a message


| Alliance |
Name |
Army Size |
Treasury |
Rank |
|
|
Alpha-SR |
19,599,967 |
Undead
|
??? Gold |
1 |
|
|
Stormforce-RoFL |
11,804,424 |
Humans
|
??? Gold |
2 |
|
|
Burntorc_LoP |
10,216,508 |
Humans
|
??? Gold |
3 |
|
|
Dark_Mirage |
9,463,540 |
Humans
|
??? Gold |
4 |
|
|
Sigma-SR |
12,490,797 |
Elves
|
??? Gold |
5 |
|
|
FearlessOrc |
9,431,629 |
Undead
|
??? Gold |
6 |
|
|
RelentlessLegacy |
8,183,090 |
Humans
|
??? Gold |
7 |
|
|
Krieper-SR |
6,607,826 |
Humans
|
??? Gold |
8 |
|
|
Hatsune_Miku |
5,491,098 |
Humans
|
??? Gold |
9 |
|
|
Chris20040719 |
6,029,182 |
Orcs
|
??? Gold |
10 |
|
|
Goldfish- |
5,005,831 |
Undead
|
??? Gold |
11 |
|
|
Zanax |
8,215,109 |
Humans
|
??? Gold |
12 |
|
|
b0neZ |
6,932,653 |
Humans
|
??? Gold |
13 |
|
|
Ravi-LoP |
3,301,586 |
Undead
|
??? Gold |
14 |
|
|
FighterOfLife_LaCN |
7,962,928 |
Undead
|
??? Gold |
15 |
|
|
tuco |
4,298,102 |
Humans
|
??? Gold |
16 |
|
|
ldavis07 |
3,949,349 |
Humans
|
??? Gold |
17 |
|
|
brownie |
2,212,380 |
Humans
|
??? Gold |
18 |
|
|
Janky |
1,029,033 |
Undead
|
??? Gold |
19 |
|
|
illkeyone |
2,342,313 |
Orcs
|
??? Gold |
20 |
| |
2,110 players total | page 1 of 106 |
Next >> |
Rankings will be updated in 26
minutes.
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Copyright © 2003-2012 Kings of Chaos, LLC. All rights reserved. Kings of Chaos ® is a registered trademark of Kings of Chaos, LLC.
|


Your way to science
If you are a student
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<EMAIL_ADDRESS><EMAIL_ADDRESS><EMAIL_ADDRESS><EMAIL_ADDRESS>Have something to tell? Then fill in the form


exploits/linux/local/service_persistence.rb
This module will create a service on the box, and mark it for auto-restart.
We need enough access to write service files and potentially restart services
Checks for where to go: systemd, upstart, system_v
Writes backdoor- /lib/systemd/system/backdoor.service
- /etc/init/backdoor.conf
Enables:
systemctl enable backdoor.service
update-rc.d backdoor defaults
update-rc.d backdoor enable
chkconfig --add backdoor
chkconfig backdoor on
Starts:
systemctl start backdoor.service
initctl start backdoor.service
service backdoor start
/etc/init.d/backdoor start


$scope.myDate = new Date(2011, 11, 12);
$scope.myCity = 2;
$scope.myYear = new Date(2012,11, 12);
$scope.myDate2 = new Date();
$scope.myTime = new Date();
$scope.myCustomTime = "23:21";
$scope.myDateTime = new Date();
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Word Amalgamation
问题描述 :
In millions of newspapers across the United States there is a word game called Jumble. The object of this game is to solve a riddle, but in order to find the letters that appear in the answer it is necessary to unscramble four words. Your task is to write a program that can unscramble words.
输入:
The input contains four parts:1. a dictionary, which consists of at least one and at most 100 words, one per line;
2. a line containing XXXXXX, which signals the end of the dictionary;
3. one or more scrambled `words’ that you must unscramble, each on a line by itself; and
4. another line containing XXXXXX, which signals the end of the file.
2. a line containing XXXXXX, which signals the end of the dictionary;
3. one or more scrambled `words’ that you must unscramble, each on a line by itself; and
4. another line containing XXXXXX, which signals the end of the file.
All words, including both dictionary words and scrambled words, consist only of lowercase English letters and will be at least one and at most six characters long. (Note that the sentinel XXXXXX contains uppercase X’s.) The dictionary is not necessarily in sorted order, but each word in the dictionary is unique.
输出:
For each scrambled word in the input, output an alphabetical list of all dictionary words that can be formed by rearranging the letters in the scrambled word. Each word in this list must appear on a line by itself. If the list is empty (because no dictionary words can be formed), output the line “NOT A VALID WORD” instead. In either case, output a line containing six asterisks to signal the end of the list.
样例输入:
tarp given score refund only trap work earn course pepper part XXXXXX resco nfudre aptr sett oresuc XXXXXX
样例输出:
score ****** refund ****** part tarp trap ****** NOT A VALID WORD ****** course ******
地址：http://acm.hdu.edu.cn/showproblem.php?pid=1113
题意：给一堆单词做字典，XXXXXX结束。然后给若干个单词，输出它和字典里哪些单词由同样的字母（个数也相同）组成，有多组的话按字典序输出。XXXXXX结束。
mark：题意有点绕。。。思路是先把字典里的单词排序，并且每个单词计算一个值val。这个val是把单词的字母排序以后hash得到的，范围是26^6也就是3亿多一点，可以用int来表示。这样接下来每个单词输入的时候，只要比对字典里的val，相同则可以输出。不hash的话就多存一个字母排序以后的单词也可以。
代码：
# include <stdio.h> # include <string.h> # include <stdlib.h> typedef struct NODE{ char str[10] ; int len, val ; }NODE ; NODE dp[110] ; int scmp(const void *a, const void *b) { return *(char*)a - *(char*)b ; } int calc(char *str, int len) { int rtn = 0 ; qsort(str, len, 1, scmp) ; while (len--) { rtn = rtn * 27 + str[0] ; str++ ; } return rtn ; } int cmp( const void *a, const void *b) { NODE *p = (NODE*)a, *q = (NODE*) b ; return strcmp(p->str, q->str) ; } int main () { int n, i = 0, flag ; char str[10] ; while (gets(str) && strcmp(str, "XXXXXX")) { strcpy (dp[i].str, str) ; dp[i].len = strlen(str) ; dp[i].val = calc(str, dp[i].len) ; i++ ; } n = i ; qsort(dp, n, sizeof(NODE), cmp) ; while (gets(str) && strcmp(str, "XXXXXX")) { flag = 0 ; for (i = 0 ; i < n ; i++) { if (strlen(str) == dp[i].len && calc(str, dp[i].len) == dp[i].val) { puts (dp[i].str) ; flag = 1 ; } } if (flag == 0) puts ("NOT A VALID WORD") ; puts ("******") ; } return 0 ; }
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铁仔,等下打算去哪里?
铁仔,等下打算去哪里?
铁仔,等下打算去哪里?
铁仔,等下打算去哪里?
Thanks for taking the time to examine this, I really feel strongly about it and love studying a lot more on this topic. If possible, as you acquire experience
第二种想法，我想来好久，为啥需要一个newhead，发现是把最后一个节点一直返回到嘴上面这层函数。厉害，这道题之前没样子想过。
题目需要求解的是最小值，而且没有考虑可能存在环
有点意思
递归还真是一门学问，学习了
好厉害～
因为是要把从字符串s的start位到当前位在hash中重置，修改提交后能accept，但是不修改居然也能accept
原来如此 了解了
正有此意，欢迎更多的建议~
正有此意，欢迎更多的建议~
看见的晚了，只能提交一次唉
问题3中，GetRightPosition()和GetLeftPosition()与STL中的upper_bound()和lower_boune()的代码实现一样吗？
多谢支持！
理解错了。。。。。谢谢楼主~~


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