Samjin

var throttle = (function () {
  return function (fn, delay) {
    delay || (delay = 100);
    var last = +new Date;
    return function () {
      var now = +new Date;
      if (now - last > delay) {
        fn.apply(this, arguments);
        last = now;
      }

Samjin

var module = (function() {

    var _private = {
        i:5,
        get : function() {
            console.log( "current value:" + this.i);
        },
        set : function( val ) {
            this.i = val;
        },