How can I repeat strings in JavaScript? [duplicate]

Answer 1

Here's a neat way that involves no loops. In addition to being concise, I'm pretty sure using join is much more efficient for very large strings.

function repeat(str, num) { 
    return (new Array(num+1)).join(str); 
}

You could also put this code on the String prototype, but I'm of the mindset that it's a bad idea to mess with the prototype of built in types.