jQuery filter by an attribute value

Question

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Answer 1

Not claiming this is any more elegant, but using filter() on a collection allows much more flexibility on what you can match on, and is a little less error prone than string concatenation.

var matching = $('.selectedColumns a').filter(function(){
                   return $(this).attr('attributeid') == 41
                });
    matching.prop('selected', true);

Answer 2

There's no need for the : or double = in your attribute-equals selector, it should just be:

$('.selectedColumns a[attributeid=' + $(this).val() + ']');

Also if you're using invalid attributes, consider using data- attributes which are valid in HTML5, for example data-id instead of attributeid.

Answer 3

use a single = instead of 2. Also, the : shoudn't be there afaik

var link = $('.selectedColumns a[attributeid=' + $(this).val() + ']');