gistfile1.js

Array.prototype.find = function(value){
	var result = [], i = 0;
	for (var i = 0, l = this.length; i < l; i++){
		var item = this[i];
		if (item == value) result.push(i);
	}
	return result;
};

Array.prototype.find = function(value){
	var result = [], item = this[0], i = 1;
	do {
		if (item == value) result.push(i);
	} while (item = this[i++]);
	return result;
};