Use JavaScript to implement a singleton Mode

Use JavaScript to demonstrate the Singleton design mode. Singleto

Basic Structure of Singleton mode:

MyNamespace.Singleton = function() {return {};}();

For example:

MyNamespace.Singleton = (function() {return     {     // Public members.publicAttribute1: true,publicAttribute2: 10,publicMethod1: function() {...},publicMethod2: function(args)     {...}};})();

However, the Singleton above has been established when the code is loaded. How can we delay loading? Use the following mode:

MyNamespace.Singleton = (function() {function constructor()     {     // All of the normal singleton code goes here....}return     {getInstance: function()         {// Control code goes here.}}})();

Specifically, put the code for creating a singleton In the constructor and instantiate the code at the first call:

The complete code is as follows:

MyNamespace.Singleton = (function() {var uniqueInstance; // Private attribute that holds the single instance.function constructor()     {     // All of the normal singleton code goes here....}return     {getInstance: function()         {if(!uniqueInstance) {             // Instantiate only if the instance doesn't exist.    uniqueInstance = constructor();}return uniqueInstance;}}})();

Address of this article: http://www.nowamagic.net/librarys/veda/detail/573,welcome to the original release.