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

For all browsers

This is about as concise as it gets :

function repeat(s, n) { return new Array(n+1).join(s); }

If you also care about performance, this is a much better approach :

function repeat(s, n) { var a=[],i=0;for(;i

If you want to compare the performance of both options, see this Fiddle and this Fiddle for benchmark tests. During my own tests, the second option was about 2 times faster in Firefox and about 4 times faster in Chrome!

For moderns browsers only :

In modern browsers, you can now also do this :

function repeat(s,n) { return s.repeat(n) };

This option is not only shorter than both other options, but it's even faster than the second option.

Unfortunately, it doesn't work in any version of Internet explorer. The numbers in the table specify the first browser version that fully supports the method :