Tutorial by Examples: e

There are many more metamethods, some of them are arithmetic (e.g. addition, subtraction, multiplication), there are bitwise operations (and, or, xor, shift), comparison (<, >) and also basic type operations like == and # (equality and length). Lets build a class which supports many of these o...

There is a metamethod called __call, which defines the bevahiour of the object upon being used as a function, e.g. object(). This can be used to create function objects: -- create the metatable with a __call metamethod local meta = { __call = function(self) self.i = self.i + 1 e...

Perhaps the most important use of metatables is the possibility to change the indexing of tables. For this, there are two actions to consider: reading the content and writing the content of the table. Note that both actions are only triggered if the corresponding key is not present in the table. Re...

Sometimes, you don't want to trigger metamethods, but really write or read exactly the given key, without some clever functions wrapped around the access. For this, lua provides you with raw table access methods: -- first, set up a metatable that allows no read/write access local meta = { __i...

To create a background session // Swift: let mySessionID = "com.example.bgSession" let bgSessionConfig = NSURLSessionConfiguration.backgroundSessionConfigurationWithIdentifier(mySessionID) let session = NSURLSession(configuration: bgSessionConfig) // add tasks here //...

In C# 5.0 and earlier the developer could only suppress warnings by number. With the introduction of Roslyn Analyzers, C# needs a way to disable warnings issued from specific libraries. With C# 6.0 the pragma directive can suppress warnings by name. Before: #pragma warning disable 0501 C# 6.0: ...

Ionic Framework A Cross-platform mobile application development framework using Angular JS and Front End web technologies. Official website: http://ionicframework.com/ Documentation: http://ionicframework.com/docs/ Installation and Setup Installation Ionic required NPM(Node Package Manager) an...

import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.SwingUtilities; import javax.swing.WindowConstants; /** * A very simple Swing example. */ public class SwingExample { /** * The number of times the ...

import std.stdio; void main() { int[] arr = [1, 2, 3, 4]; writeln(arr.length); // 4 writeln(arr[2]); // 3 // type inference still works auto arr2 = [1, 2, 3, 4]; writeln(typeof(arr2).stringof); // int[] }

import std.stdio; void main() { int[] arr = [1, 2, 3]; // concatenate arr ~= 4; writeln(arr); // [1, 2, 3, 4] // per element operations arr[] += 10 writeln(arr); // [11, 12, 13, 14] }

import std.stdio; void main() { int[] arr = [1, 2, 3, 4, 5]; auto arr2 = arr[1..$ - 1]; // .. is the slice syntax, $ represents the length of the array writeln(arr2); // [2, 3, 4] arr2[0] = 42; writeln(arr[1]); // 42 }

You can create a new branch and switch to it using git checkout -b AP-57 After you use git checkout to create a new branch, you will need to set that upstream origin to push to using git push --set-upstream origin AP-57 After that, you can use git push while you are on that branch.

3D transforms can be use to create many 3D shapes. Here is a simple 3D CSS cube example: HTML: <div class="cube"> <div class="cubeFace"></div> <div class="cubeFace face2"></div> </div> CSS: body { perspective-origin: 5...

import std.format; void main() { string s = "Name Surname 18"; string name, surname; int age; formattedRead(s, "%s %s %s", &name, &surname, &age); // %s selects a format based on the corresponding argument's type } Official documentatio...

By default a property is a primary key if a property on a class is named “ID” (not case sensitive), or the class name followed by "ID". If the type of the primary key property is numeric or GUID it will be configured as an identity column. Simple Example: public class Room { // Pri...

To get template item by template Id. TemplateItem templateItem = Sitecore.Context.Database.GetTemplate(new ID("{11111111-1111-1111-1111-111111111111}"));

Input the name of the template to get the template by using GetTemplate Method. TemplateItem templateItem = Sitecore.Context.Database.GetTemplate("NameOfTheTemplate");

While you can create LaTeX documents using any editor and compiling using the console, there exist several plugins for widely used editors to simplify creating LaTeX documents, and there are specialized LaTeX editors. An exhaustive list of LaTeX editors is available on TeX.SE (the StackExchange site...

A WM_CREATE message is sent to your window procedure during the window's CreateWindowEx call. The lp argument contains a pointer to a CREATESTRUCT which contains the arguments passed to CreateWindowEx. If an application returns 0 from WM_CREATE, the window is created. If an application returns -1, ...

This message is sent to your window procedure when a window is being destroyed. It is sent after the window is removed from the screen. Most applications free any resources, like memory or handles, obtained in WM_CREATE. If you handle this message, return 0. LRESULT CALLBACK winproc(HWND hwnd, UINT...