Tutorial by Examples: en

Refinements have special limitations. refine can only be used in a module scope, but can be programmed using send :refine. using is more limited. It can only be called in a class/module definition. Still, it can accept a variable pointing to a module, and can be invoked in a loop. An example show...

func multiply2(item: Int)-> Int { return (item + 2) } let multiply2ToMe = multiply2 // passing the function directly to the function as param print(math.performOperation(inputArray: arrayToBeProcessed, operation: multiply2ToMe)) Output: [3, 5, 7, 9, 11, 13, 10, 8, 6, 4, 102] ...

The following will produce a PNG image in the current directory of the loaded page. chrome --headless --screenshot https://stackoverflow.com

Using the --remote-debugging-port to expose a debugger accessible over HTTP is one way appliances can connect and interact with the document using the Chrome Debugging Protocol. chrome --headless --remote-debugging-port=9222 https://stackoverflow.com You can then navigate to http://localhost:9222 ...

This example is was modeled after an example that I found on the internet. I can't find the link or I would give the author credit. I took the sample that I found and modified it to work for my application. Add the following references: System.Xaml, PresentationCore, PresentationFramework,...

You can't improve something you can't measure. To improve the performance of React components, you should be able to measure it. ReactJS provides with addon tools to measure performance. Import the react-addons-perf module to measure the performance import Perf from 'react-addons-perf' // ES6 var ...

$username = "[email protected]" $pwdTxt = Get-Content "C:\temp\Stored_Password.txt" $securePwd = $pwdTxt | ConvertTo-SecureString $credObject = New-Object System.Management.Automation.PSCredential -ArgumentList $username, $securePwd # Now, $credObject is having the credential...

Module Module1 Sub Main() Debug.WriteLine("Starting aplication") Debug.Indent() LoopAndDoStuff(5) Debug.Unindent() Console.WriteLine("Press a key to exit") Console.ReadKey() Debug.WriteLine("End of a...

An artifact built by Maven can be declared as a Maven plugin by specifying the packaging as maven-plugin in the pom.xml. <packaging>maven-plugin</packaging> You need to declare a dependency on the plugin API and annotations. <dependency> <groupId>org.apache.maven&lt...

When you want for example enforce the use of the parameter Password if the parameter User is provided. (and vise versa) Function Do-Something { Param ( [Parameter(Mandatory=$true)] [String]$SomeThingToDo, [Parameter(ParameterSetName="Credentials", man...

A synchronous producer-consumer solution ensures that the consumer reads every data item written by the producer exactly one time. Asynchronous solutions allow the consumer to sample the output of the producer. Either the consumer consumes the data faster than it is produced, or the consumer consume...

SELECT date_trunc('week', <>) AS "Week" , count(*) FROM <> GROUP BY 1 ORDER BY 1;

Some applications may want to create so-called "Fire & Forget" tasks which can be periodically triggered and do not need to return any type of value returned upon completion of the assigned task (for example, purging old temp files, rotating logs, autosaving state). In this example, w...

Here are the steps to generate test skeleton for existing code: Open Eclipse, and choose the project you want to create test cases for In the Package Explorer, select the java class you want to generate the Junit test for Go to File -> New -> Junit Test Cases Change the Source folder to ...

#!/usr/bin/python input_list = [10,1,2,11] for i in range(len(input_list)): for j in range(i): if int(input_list[j]) > int(input_list[j+1]): input_list[j],input_list[j+1] = input_list[j+1],input_list[j] print input_list

Eventloop in pseudo code An event loop is a loop that waits for events and then reacts to those events while true: wait for something to happen react to whatever happened Example of a single-threaded HTTP server with no event loop while true: socket = wait for the next TCP c...

2009 3rd March : The project was named as "node" 1st October : First very early preview of npm, the Node package manager 8th November : Ryan Dahl's (Creator of Node.js) Original Node.js Talk at JSConf 2009 2010 Express: A Node.js web development framework Socket.io initial...

If we have a schema looking like: <field name="id" type="string" indexed="true" stored="true" required="true" /> <field name="name" type="string" indexed="true" stored="true" /> the solrj co...

You can source configuration from environment variables by calling .AddEnvironmentVariables() on you ConfigurationBuilder. It will load environment variables prefixed with APPSETTING_ It will then use colon : as the key path separator. This means that : following environement settings : APPSETTI...

To use OpenGL ES in your application you must add this to the manifest: <uses-feature android:glEsVersion="0x00020000" android:required="true"/> Create your extended GLSurfaceView: import static android.opengl.GLES20.*; // To use all OpenGL ES 2.0 methods and constants...