Extract a number from a string (JavaScript)

Question

I have a string in JavaScript like #box2 and I just want the 2 from it.

I tried:

var thestring = $(this).attr(\'href\');
var          


        

Answer 1

You can use Underscore String Library as following

var common="#box"
var href="#box1"

_(href).strRight(common)

result will be : 1

See :https://github.com/epeli/underscore.string

DEMO:
http://jsfiddle.net/abdennour/Vyqtt/
HTML Code :

    img1
    img2
    img3
    img4

JS Code :

var comm="#box"
$('a').click(function(){
  $('div').html(_($(this).attr('href')).strRight(comm))})

if you have suffix as following :

href="box1az" 

You can use the next demo :

http://jsfiddle.net/abdennour/Vyqtt/1/

function retrieveNumber(all,prefix,suffix){
 var left=_(all).strRight(prefix);
 return _(left).strLeft(suffix);

}