Repeat String - Javascript

Question

What is the best or most concise method for returning a string repeated an arbitrary amount of times?

The following is my best shot so far:

function          


        

Answer 1

Here's the JSLint safe version

String.prototype.repeat = function (num) {
  var a = [];
  a.length = num << 0 + 1;
  return a.join(this);
};