This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.
Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:
getTweetsFor("domenic", function (err, results) {
// the rest of your code goes here.
| var Parent = function Parent(){ | |
| }; | |
| Parent.prototype = { | |
| a:function a(){ | |
| console.log(333); | |
| } | |
| }; |
| (function () { | |
| var h, k = this, | |
| ba = function (a) { | |
| var b = typeof a; | |
| if ("object" == b) | |
| if (a) { | |
| if (a instanceof Array) return "array"; | |
| if (a instanceof Object) return b; | |
| var c = Object.prototype.toString.call(a); | |
| if ("[object Window]" == c) return "object"; |
| <?php | |
| $a = array( | |
| 1 => "First", | |
| 2 => "Second", | |
| 5 => "Fifth" | |
| ); | |
| ?> |
| .notepad { | |
| background: #f6f6f6; | |
| box-shadow: 0 1px 4px rgba(0,0,0,0.25); | |
| position: relative; | |
| background-image: -webkit-radial-gradient(#e6e6e6 21%, transparent 21%),-webkit-radial-gradient(rgba(0,0,0,0.25) 21%, transparent 26%),-webkit-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0) 95%, rgba(96,159,159,0.1) 95%, rgba(96,159,159,0.1) 100%); | |
| background-image: -moz-radial-gradient(#e6e6e6 21%, transparent 21%),-moz-radial-gradient(#e6e6e6 10%, transparent 12%),-moz-linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0) 95%, rgba(96,159,159,0.1) 95%, rgba(96,159,159,0.1) 100%); | |
| background-image: radial-gradient(#e6e6e6 21%, transparent 21%),radial-gradient(#e6e6e6 10%, transparent 12%),linear-gradient(top, rgba(0,0,0,0) 0%, rgba(0,0,0,0) 95%, rgba(96,159,159,0.1) 95%, rgba(96,159,159,0.1) 100%); | |
| background-position: 6px 6px,6px 5px,50% 18px; | |
| background-repeat: repeat-y,repeat-y,repeat; | |
| background-size: 48px 48px,48px 48px,24px 24px; |
| Rails.application.config.middleware.use OmniAuth::Builder do | |
| configure do |config| | |
| config.path_prefix = "/aircel/auth" | |
| config.full_host = "http://localhost:3000/" | |
| end | |
| provider :developer unless Rails.env.production? | |
| provider :google_oauth2, CONFIG['google_credentials']['client_id'], CONFIG['google_credentials']['client_secret'] | |
| end |
| 'use strict'; | |
| var lrSnippet = require('grunt-contrib-livereload/lib/utils').livereloadSnippet; | |
| var mountFolder = function (connect, dir) { | |
| return connect.static(require('path').resolve(dir)); | |
| }; | |
| // # Globbing | |
| // for performance reasons we're only matching one level down: | |
| // 'test/spec/{,*/}*.js' | |
| // use this if you want to match all subfolders: |
| function inherit(childClass,parentClass) { | |
| var f=function(){}; // defining temp empty function | |
| f.prototype=parentClass.prototype; | |
| f.prototype.constructor=f; | |
| childClass.prototype=new f; | |
| childClass.prototype.constructor=childClass; // restoring proper constructor for child class | |
| parentClass.prototype.constructor=parentClass; // restoring proper constructor for parent class | |
| } |
| testObj = SomeModule::Test.new | |
| testObj.create_class "airtel" # Creates a new class Airtel | |
| Airtel.new.hello_class # prints Hello from new class |
| npm install -g yo |