Array.each which allows 'return false' to break the loop.

Array.each.js

// Array native is protected, so can't do Array.implement
Array.prototype.each = function(fn, bind){
	for (var i = 0, l = this.length; i < l; i++){
		var r = fn.call(bind, this[i], i, this);
		if (r === false) break;
	}
};

Native.genericize(Array, 'each', true);