Tutorial by Examples: l

Adding the DebuggerDisplay Attribute will change the way the debugger displays the class when it is hovered over. Expressions that are wrapped in {} will be evaluated by the debugger. This can be a simple property like in the following sample or more complex logic. [DebuggerDisplay("{StringPr...

In Objective-C, method swizzling is the process of changing the implementation of an existing selector. This is possible due to the way Selectors are mapped on a dispatch table, or a table of pointers to functions or methods. Pure Swift methods are not dynamically dispatched by the Objective-C run...

Putting a & (ampersand) in front of an argument will pass it as the method's block. Objects will be converted to a Proc using the to_proc method. class Greeter def to_proc Proc.new do |item| puts "Hello, #{item}" end end end greet = Greeter.new %w(world l...

git diff [HEAD|--staged...] --word-diff Rather than displaying lines changed, this will display differences within lines. For example, rather than: -Hello world +Hello world! Where the whole line is marked as changed, word-diff alters the output to: Hello [-world-]{+world!+} You can omit...

In this approach, the single is accessed via the static method: Singleton.getInstance(); To enforce only one instance of the singleton, a private static variable retains the instance, while any additional attempts to instantiate an instance are enforced within the constructor. package { publ...

Cocoa is Apple's API to develop apps for macOS, formerly known as OS X. Cocoa is a container framework, and contains three sub-frameworks. Foundation AppKit CoreData Cocoa Touch is Apple's version of Cocoa to develop apps for iOS, watchOS and tvOS. Cocoa Touch contains the same sub-framewo...

If you want to download an object from GCS that is publicly viewable, the simplest way is to use a web browser or a command line tool to fetch a URL with this pattern: https://storage.googleapis.com/bucketName/objectName. Example: https://storage.googleapis.com/pub/someOfTheTeam.jpg

This filter is very useful. One of the common problems for developers is how to include templates in plugins they develop. The filter is applied immediately after wordpress locates the appropriate template in the active child/parent theme using the wp hierarchy. Be careful to define when you want ...

add_filter('template_include', 'custom_function'); function custom_function($template){ /* * This example is a little more advanced. * It will check to see if $template contains our post-type in the path. * If it does, the theme contains a high level templat...

git stash list This will list all stashes in the stack in reverse chronological order. You will get a list that looks something like this: stash@{0}: WIP on master: 67a4e01 Merge tests into develop stash@{1}: WIP on master: 70f0d95 Add user role to localStorage on user login You can refer t...

To apply the last stash and remove it from the stack - type: git stash pop To apply specific stash and remove it from the stack - type: git stash pop stash@{n}

Applies the last stash without removing it from the stack git stash apply Or a specific stash git stash apply stash@{n}

function randomMinMax(min:Number, max:Number):Number { return (min + (Math.random() * Math.abs(max - min))); } This function is called by passing a range of minimum and maximum values. Example: randomMinMax(1, 10); Example outputs: 1.661770915146917 2.5521070677787066 9.4362709657...

function randomAngle():Number { return (Math.random() * 360); } Example outputs: 31.554428357630968 230.4078639484942 312.7964010089636

To ignore a file foo.txt in any directory you should just write its name: foo.txt # matches all files 'foo.txt' in any directory If you want to ignore the file only in part of the tree, you can specify the subdirectories of a specific directory with ** pattern: bar/**/foo.txt # matches all file...

Example that builds an executable (editor) and links a library (highlight) to it. Project structure is straightforward, it needs a master CMakeLists and a directory for each subproject: CMakeLists.txt editor/ CMakeLists.txt src/ editor.cpp highlight/ CMakeLists.txt in...

Multiple rows can be inserted with a single insert command: INSERT INTO tbl_name (field1, field2, field3) VALUES (1,2,3), (4,5,6), (7,8,9); For inserting large quantities of data (bulk insert) at the same time, DBMS-specific features and recommendations exist. MySQL - LOAD DATA INFILE MSSQL - B...

Destructuring allows us to refer to one key in an object, but declare it as a variable with a different name. The syntax looks like the key-value syntax for a normal JavaScript object. let user = { name: 'John Smith', id: 10, email: '[email protected]', }; let {user: userName, id: us...

HTML 4.01/XHTML 1.0 Strict includes the following void elements: area - clickable, defined area in an image base - specifies a base URL from which all links base br - line break col - column in a table [deprecated] hr - horizontal rule (line) img - image input - field where users enter data...

public class LogActionFilter : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { Log("OnActionExecuting", filterContext.RouteData); } public override void OnActionExecuted(ActionExecute...