ModulePattern.js

// Module pattern test

function show(string) {console.log(string);}

function MyMod (){

  // constructor
  var c = 0;

  function priv(){
    c = c+1
    return c;
  }

  function sayA(){
    return "boom: " + priv();
  }

  return { // public methods
    sayA: sayA 
  }
}

var here = MyMod();
var there = new MyMod();

show( here.sayA() );  // 1
show( there.sayA() ); // 1

show( here.sayA() );  // 2
show( there.sayA() ); // 2