Question

122

Javascript: Replace characters after _

rated 0 times [ 129] [ 7] / answers: 1 / hits: 23506 / 12 Years ago, thu, april 12, 2012, 12:00:00

I'm trying to do something which seems fairly basic, but can't seem to get it working.

I'm trying to strip the characters after the last instance of an underscore.

I have this string, for example:

www/images/10/20120412/28-696-b0b9815463e47c9371b02b7202788a75_tn.jpg

and I'm trying to strip out the 'tn.jpg' to produce:

www/images/10/20120412/28-696-b0b9815463e47c9371b02b7202788a75_

I tried doing .slice(0,-6) but that will only work for instances of _tn.jpg and not _med.jpg.

Ultimately, I'm going to be swapping in different sizes of images (_med.jpg, _full.jpg etc.) and it needs to be only after the last underscore (there might be underscores in the URL).

Any help would be greatly appreciated!

Zack

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andreguym

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answered 12 Years ago luizc · Accepted Answer

You can it like this:

var testURL = dvuivnhuiv_ew;

var output = testURL.substring(0, testURL.lastIndexOf('_') + 1);

console.log(output);