Tutorial by Examples: ga

Render a white rectangle over an image with the composite operation ctx.globalCompositeOperation = 'difference'; The amount of the effect can be controled with the alpha setting // Render the image ctx.globalCompositeOperation='source-atop'; ctx.drawImage(image, 0, 0); // set the composite...

PrepareForSegue: func prepareForSegue(_ segue:UIStoryboardSegue, sender sender:AnyObject?) Notifies the view controller that a segue is about to be performed Parameters segue: The segue object. sender: The object that initialized the segue. Example in Swift Perform a task if the ident...

Unwind Segues Unwind Segues give you a way to “unwind” the navigation stack and specify a destination to go back to. The signature of this function is key to Interface Builder recognizing it. It must have a return value of IBAction and take one parameter of UIStoryboardSegue. The name of the ...

If the administrator creates your database for you when setting up your permissions, you can begin using it. Otherwise, you need to create it yourself: mysql> CREATE DATABASE menagerie; Under Unix, database names are case sensitive (unlike SQL keywords), so you must always refer to your datab...

To install DevExpress .NET products on your development machine, it is first necessary to obtain the DevExpress .NET Products Installer. You can download it from the http://www.devexpress.com website in one of the following ways, based on the status of your current account. Download the Trial ...

identification division. program-id. altering. date-written. 2015-10-28/06:36-0400. remarks. Demonstrate ALTER. procedure division. main section. *> And now for some altering. contrived. ALTER story TO PROCEED TO beginning GO TO story . *> Jump to a part of the story...

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Using a pipe makes the output of a command be the input of the next one. ls -1 | grep -c ".conf" In this case the ouput of the ls command is used as the input of the grep command. The result will be the number of files that include ".conf" in their name. This can be used to ...

element.style only reads CSS properties set inline, as an element attribute. However, styles are often set in an external stylesheet. The actual style of an element can be accessed with window.getComputedStyle(element). This function returns an object containing the actual computed value of all the ...

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration]; NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"]; NSURLReq...

This example will show how to make and use animation clips for game objects or players. Note, the models used in this example are downloaded from Unity Asset Store. The player was downloaded from the following link: https://www.assetstore.unity3d.com/en/#!/content/21874. To create animations, firs...

Tags are typically applied via the editor; however, you can also apply tags via script. Any custom tag must be created via the Tags & Layers window before being applied to a game object. Setting Tags in the Editor With one or more game objects selected, you can select a tag from the inspecto...

Tags make it particularly easy to locate specific game objects. We can look for a single game object, or look for multiple. Finding a Single GameObject We can use the static function GameObject.FindGameObjectWithTag(string tag) to look for individual game objects. It is important to note that, i...

Like for 1D signals, it's possible to filter images by applying a Fourier transformation, multiplying with a filter in the frequency domain, and transforming back into the space domain. Here is how you can apply high- or low-pass filters to an image with Matlab: Let image be the original, unfiltere...

This example demonstrates how to do compile time checking of an annotated element. The annotation The @Setter annotation is a marker can be applied to methods. The annotation will be discarded during compilation not be available afterwards. package annotation; import java.lang.annotation.Eleme...

Always encode from unicode to bytes. In this direction, you get to choose the encoding. >>> u'🐍'.encode('utf-8') '\xf0\x9f\x90\x8d' The other way is to decode from bytes to unicode. In this direction, you have to know what the encoding is. >>> b'\xf0\x9f\x90\x8d'.decode('...

To run the unit tests for a package, use the Pkg.test function. For a package named MyPackage, the command would be julia> Pkg.test("MyPackage") An expected output would be similar to INFO: Computing test dependencies for MyPackage... INFO: Installing BaseTestNext v0.2.2 INFO: Te...

Unit tests are declared in the test/runtests.jl file in a package. Typically, this file begins using MyModule using Base.Test The basic unit of testing is the @test macro. This macro is like an assertion of sorts. Any boolean expression can be tested in the @test macro: @test 1 + 1 == 2 @test...

0.5.0 In version v0.5, test sets are built into the standard library Base.Test module, and you don't have to do anything special (besides using Base.Test) to use them. 0.4.0 Test sets are not part of Julia v0.4's Base.Test library. Instead, you have to REQUIRE the BaseTestNext module, and add u...

To save a reference to a cell in a variable, you must use the Set syntax, for example: Dim R as Range Set R = ActiveSheet.Cells(3, 1) later... R.Font.Color = RGB(255, 0, 0) Why is the Set keyword required? Set tells Visual Basic that the value on the right hand side of the = is meant to be ...