[字串重覆] String Repeat

gistfile1.js

function repeat(str, n) {
  var tmp = '';
	for(var i = 0; i < n; i++) {
		tmp += str;
	}
	return tmp;
}
console.log(repeat('Toro', 3));

String.prototype.repeat = function(n) {
	var arr = new Array(n + 1);
	return arr.join(this);
};
console.log('Toro'.repeat(3));