bcherry

var module = (function () {
  var my = {},
      privateStaticModuleVariable = "something";
  
  my.publicStaticObjectConstructor = function () {
    var that = {},
        privateInstanceVariable = "something";
    
    that.publicInstanceVariable = "something";
    function privateInstanceFunction() {}

bcherry

function foo(one, two, three) {
  one = one || "defaultvalue"; // assigns default value if one is falsy (null, undefined, 0, "0", false, etc.)
  two = two == null ? "defaultvalue" : two; // assigns default value if 'two' is not null or undefined (so you can pass things like 0 or false)
  three = three === undefined ? "defaultvalue" : three; // assigns default value if three is not undefined (so you can pass null)
}

bcherry

var foo = {
  bar: "foobar",
  func: function () {
    return this.bar;
  }
};

foo.func(); // "foobar"

var functionReferences = {};

bcherry

var MYGLOBAL = (function () {
  var that = {},
      privateVariable = 2;

  function privateFunction() {
    //...
  }

  that.publicFunction = function () {
     //

bcherry

var ids = ["elem1", "elem2", "elem3"...],
    i,
    l = ids.length;

for (i = 0; i < l; i += 1) {
  (function (i) {
     $("#" + ids[i]).bind("click", function () {
       alert(i);
     });
  }());

bcherry

NaN === NaN; // false
NaN + 1; // NaN
NaN = 1;
NaN === NaN; // true
NaN + 1; // 2

typeof undefined; // "undefined"
undefined = 1;
typeof undefined; // "number"

bcherry

var mycallback;

function foo() {
   var x, y, z;
   function bar() {/* something with x, y, and z*/}
   mycallback = bar;
};