Javascript里的设计模式

不管你信不信反正js很高深，虽然平时都是getElementById，现在用了jQuery，这东西也很少用了，也就for,if或者字符串操作一下。

本文本着实用的原则，列举了几个常用的js代码写法，让自己的js看起来更优美。

更多详细：http://addyosmani.com/resources/essentialjsdesignpatterns/book/

1. Constructor Pattern

   function Car( model, year, miles ) {  this.model = model;  this.year = year;  this.miles = miles;}// Note here that we are using Object.prototype.newMethod rather than // Object.prototype so as to avoid redefining the prototype objectCar.prototype.toString = function () {  return this.model + " has done " + this.miles + " miles";};// Usage:var civic = new Car( "Honda Civic", 2009, 20000 );var mondeo = new Car( "Ford Mondeo", 2010, 5000 );console.log( civic.toString() );console.log( mondeo.toString() );
   
   
   用this声明的就相当于public的

2. Module Pattern

   var myModule = {  myProperty: "someValue",  // object literals can contain properties and methods.  // e.g we can define a further object for module configuration:  myConfig: {    useCaching: true,    language: "en"  },  // a very basic method  myMethod: function () {    console.log( "Where in the world is Paul Irish today?" );  },  // output a value based on the current configuration  myMethod2: function () {    console.log( "Caching is:" + ( this.myConfig.useCaching ) ? "enabled" : "disabled" );  },  // override the current configuration  myMethod3: function( newConfig ) {    if ( typeof newConfig === "object" ) {      this.myConfig = newConfig;      console.log( this.myConfig.language );    }  }};// Outputs: Where in the world is Paul Irish today?myModule.myMethod();// Outputs: enabledmyModule.myMethod2();// Outputs: frmyModule.myMethod3({  language: "fr",  useCaching: false});

   var myNamespace = (function () {  var myPrivateVar, myPrivateMethod;  // A private counter variable  myPrivateVar = 0;  // A private function which logs any arguments  myPrivateMethod = function( foo ) {      console.log( foo );  };  return {    // A public variable    myPublicVar: "foo",    // A public function utilizing privates    myPublicFunction: function( bar ) {      // Increment our private counter      myPrivateVar++;      // Call our private method using bar      myPrivateMethod( bar );    }  };})();