How to return integer from URL hash using Javascript

Question

I want to run a script that extracts an integer from the URL hash (#), or zero if no integer is found.

The URLs could be any of these formats:

The above examples would return:

I'm running jQuery and looking for the cleanest way of doing this in either pure Javascript or jQuery.

Thanks in advance.

Joe · Accepted Answer · 2011-09-15 03:48:01Z

4

You could do it in one line:

var integer = window.location.hash.match(/\d+/) | 0;

This will match the first one or more digits in the hash.
then bitwise OR the result with 0. Javascript bit operations are on 32-bit signed integer (except >>>)
return the result of the match as an integer, or if match is undefined, return zero

answered Sep 15, 2011 at 3:32

Joe

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1 Comment

Very nice operations there, although there's no match method on location. Try location.href or location.hash.

Digital Plane · Accepted Answer · 2011-09-15 03:24:28Z

2

To get the first integer (not a decimal) in the hash, you could use regex:

var match = location.hash.match(/\d+/);
if(match)
  var n = parseInt(match[0], 10);
else
  var n = 0;

answered Sep 15, 2011 at 3:24

Digital Plane

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