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Modifying all data-original text

     

ocon

10:56 am on May 21, 2014 (gmt 0)

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I'm having a hard time inserting "@2" before the file extension of all data-original attributes on a page. Is there a simple way of doing this? If it helps, I'm using jQuery.

<div data-original="/XXXXX.jpg" /> to <div data-original="/XXXXX@2.jpg" />

Fotiman

2:45 pm on May 21, 2014 (gmt 0)

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Here's a quick and dirty example:

// Find all elements with data-original attribute
$('[data-original]').each(function () {
var $this = $(this),
origVal = $this.data('original'),
idx = origVal.lastIndexOf('.'),
beginning = origVal.substring(0, idx),
ending = origVal.substring(idx),
newVal = beginning + (idx >= 0? '@2': '') + ending;
$this.data('original', newVal);
});


This method assumes the last "." in the string is the beginning of the file extension and uses string methods (lastIndexOf, substring) to split the string into parts, and then concatenate the results. There are probably more efficient ways to do this using split and join methods or using a RegEx.

Here's another example using split and join:

$('[data-original]').each(function () {
var $this = $(this),
origVal = $this.data('original'),
arrVals = origVal.split('.'),
newVal;
if (arrVals.length > 1) {
arrVals[arrVals.length - 2] = arrVals[arrVals.length - 2] + '@2';
newVal = arrVals.join('.');
$this.data('original', newVal);
}
});


I haven't done any performance testing on these. I find the first example to be easier to look at and quickly understand what it's doing, but your mileage may vary. :)

Hope that helps.