Simplest/Cleanest way to implement singleton in JavaScript?

Question

What is the simplest/cleanest way to implement singleton pattern in JavaScript?

Answer 1

Module pattern: in "more readable style". You can see easily which methods are publics and which ones are privates

var module = (function(_name){
   /*Local Methods & Values*/
   var _local = {
      name : _name,
      flags : {
        init : false
      }
   }

   function init(){
     _local.flags.init = true;
   }

   function imaprivatemethod(){
     alert("hi im a private method");
   }

   /*Public Methods & variables*/

   var $r = {}; //this object will hold all public methods.

   $r.methdo1 = function(){
       console.log("method1 call it");
   }

   $r.method2 = function(){
      imaprivatemethod(); //calling private method
   }

   $r.init = function(){
      inti(); //making init public in case you want to init manually and not automatically
   }

   init(); //automatically calling init method

   return $r; //returning all publics methods

})("module");

now you can use publics methods like

module.method2(); //-> I'm calling a private method over a public method alert("hi im a private method")

http://jsfiddle.net/ncubica/xMwS9/