spliting a string in Javascript

Question

I am trying to extract an article ID from the following href:

/MarketUpdate/Pricing/9352730

I just want to extract the ID at the end of the string and am using the following code:

    var $newsLink = $(this).attr('href');

    var $newsString = $newsLink.substr($newsLink.lastIndexOf('/'));

However this returns the final '/' which i do not want.

dcp · Accepted Answer · 2010-07-21 14:46:06Z

7

var $newsString = $newsLink.substr($newsLink.lastIndexOf('/')+1);

Note that your assumption here is that the '/' is present in the string and there's an ID after it. A safer way to do this check if there's a chance '/' might not be present or the ID is missing would be to check for it first using:

if ($newsLink.lastIndexOf('/') != -1 && $newsLink.lastIndexOf('/') + 1 < $newsLink.length) {
    var $newsString = $newsLink.substr($newsLink.lastIndexOf('/')+1);
}

edited Jul 21, 2010 at 14:46

answered Jul 21, 2010 at 14:40

dcp

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SLaks · Accepted Answer · 2010-07-21 14:40:34Z

2

You can skip the / character by telling the substr call to start one character after the index, like this:

var $newsString = $newsLink.substr($newsLink.lastIndexOf('/') + 1);

answered Jul 21, 2010 at 14:40

SLaks

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