JS Object / Array add Item

When I try to add item into array or object (javascript)

I can use these functions.

1. Array.push()

(ex)

var myArray = [];

myArray.push( 1 );

2.(jQuery) $.extend( a, b)

var myObject = {};

var internalObject1 = {};

var internalObject2 = {};

internalObject["a"] = 'a';

internalObject.b = 'B';

$.extend( myObject, internalObject1 );

$.extend( myObject, internalObject2 );

Let rock