Tutorial by Examples: l

The last common use of HTTP APIs is to obtain a list of existing resources on the server. Lists like this should be obtained using GET requests, since they only retrieve data. The server should return 200 OK if it can supply the list, or an appropriate error code if not. Listing our employees, the...

A cross-origin request must be sent including the Origin header. This indicates from where the request originated. For example, a cross-origin request from http://example.com to http://example.org would look like this: GET /cors HTTP/1.1 Host: example.org Origin: example.com The server will us...

Allowing user credentials or the user's session to be sent with a CORS request allows the server to persist user data across CORS requests. This is useful if the server needs to check if the user is logged in before providing data (for example, only performing an action if a user is logged in - this...

A basic CORS request is allowed to use one of only two methods: GET POST and only a few select headers. POST CORS requests can additionally choose from only three content types. To avoid this issue, requests that wish to use other methods, headers, or content types must first issue a preflig...

When a server receives a preflight request, it must check if it supports the requested method and headers, and send back a response that indicates its ability to support the request, as well as any other permitted data (such as credentials). These are indicated in access-control Allow headers. The ...

Mostly you will use "normal variables": set(VAR TRUE) set(VAR "main.cpp") set(VAR1 ${VAR2}) But CMake does also know global "cached variables" (persisted in CMakeCache.txt). And if normal and cached variables of the same name exist in the current scope, normal var...

The scope outside of any function or class is the global scope. When a PHP script includes another (using include or require) the scope remains the same. If a script is included outside of any function or class, it's global variables are included in the same global scope, but if a script is include...

integer: 25 string: "25" float: 25.0 boolean: true null type: null

Same list level: - Cat - Dog - Goldfish Nested List: - - Cat - Dog - Goldfish

Superglobal variables are defined by PHP and can always be used from anywhere without the global keyword. <?php function getPostValue($key, $default = NULL) { // $_POST is a superglobal and can be used without // having to specify 'global $_POST;' if (isset($_POST[$key])) { ...

Static class properties that are defined with the public visibility are functionally the same as global variables. They can be accessed from anywhere the class is defined. class SomeClass { public static int $counter = 0; } // The static $counter variable can be read/written from anywhere...

let someValue : String = "Something the user entered" let text = NSMutableAttributedString(string: "The value is: ") text.appendAttributedString(NSAttributedString(string: someValue, attributes: [NSFontAttributeName:UIFont.boldSystemFontOfSize(UIFont.systemFontSize())])) ...

Functionality in metaclasses can be changed so that whenever a class is built, a string is printed to standard output, or an exception is thrown. This metaclass will print the name of the class being built. class VerboseMetaclass(type): def __new__(cls, class_name, class_parents, class_dict)...

Equals is declared in the Object class itself. public virtual bool Equals(Object obj); By default, Equals has the following behavior: If the instance is a reference type, then Equals will return true only if the references are the same. If the instance is a value type, then Equals will...

Most of the time that you'll be using Vuex will be in larger component based applications where you likely be using a module bundler such as Webpack or Browserify in conjunction with Vueify if you're using single files. In this case the easiest way to get Vuex is from NPM. Run the command below to ...

Modules have four associated keywords to make using them in other modules: alias, import, use, and require. alias will register a module under a different (usually shorter) name: defmodule MyModule do # Will make this module available as `CoolFunctions` alias MyOtherModule.CoolFunctions #...

Detailed instructions on getting jvm set up or installed.

Like the built-in python interactive shell, IPython is a REPL (Read-Evaluate-Print Loop) shell, with a variety of features that make it more pleasant to use for day-to-day Python development than the built-in REPL shell. Installation To install it: pip install ipython Or, via Anaconda: # To i...

Let's set yourself up to build your own awesome Progressive Web App with Polymer! Before you can start installing Polymer you require the following: Node.js - check out the StackOverflow Installing Node.js Documentation Bower - you can install Bower using the Node Package Manager installe...

You create new ScriptableObject instances through ScriptableObject.CreateInstance<T>() T obj = ScriptableObject.CreateInstance<T>(); Where T extends ScriptableObject. Do not create ScriptableObjects by calling their constructors, ie. new ScriptableObject(). Creating ScriptableO...