// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/forEach
// Production steps of ECMA-262, Edition 5, 15.4.4.18
// Reference: http://es5.github.com/#x15.4.4.18
if (!Array.prototype.forEach) {
	Array.prototype.forEach = function( callback, thisArg ) {
		var T, k;
		if ( this == null ) {
			throw new TypeError( " this is null or not defined" );
		}
		// 1. Let O be the result of calling ToObject passing the |this| value as the argument.
		var O = Object(this);
		// 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".
		// 3. Let len be ToUint32(lenValue).
		var len = O.length >>> 0; // Hack to convert O.length to a UInt32
		// 4. If IsCallable(callback) is false, throw a TypeError exception.
		// See: http://es5.github.com/#x9.11
		if ( {}.toString.call(callback) != "[object Function]" ) {
			throw new TypeError( callback + " is not a function" );
		}
		// 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
		if ( thisArg ) {
			T = thisArg;
		}
		// 6. Let k be 0
		k = 0;
		// 7. Repeat, while k < len
		while( k < len ) {
			var kValue;
			// a. Let Pk be ToString(k).
			//   This is implicit for LHS operands of the in operator
			// b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.
			//   This step can be combined with c
			// c. If kPresent is true, then
			if ( k in O ) {
				// i. Let kValue be the result of calling the Get internal method of O with argument Pk.
				kValue = O[ k ];
				// ii. Call the Call internal method of callback with T as the this value and
				// argument list containing kValue, k, and O.
				callback.call( T, kValue, k, O );
			}
			// d. Increase k by 1.
			k++;
		}
		// 8. return undefined
	};
}