Question

Example HTML:

<div class="elem-1"></div>
<div class="elem-2"></div>
<div class="elem-2"></div>
<div class="elem-3"></div>
<div class="elem-4"></div>
<div class="elem-4"></div>
<div class="elem-4"></div>

Needed:
How can I select the div’s which has “elem-2″s and “elem-4″s with jQuery selectors? (multiple elements has same class)

Answer 1

selector will be given the value that you desire

http://jsfiddle.net/mMEN5/1

var selector = $();

var list = $('[class]').toArray().reduce(function(p, e){
    p = p || {};
    var classes = $(e).prop('class').split(/\s/);
    $.each(classes, function(i,c){
        p[c] = p[c] || [];
        p[c].push(e);
    });
    return p;
}, {})

for (el in list) if (list[el].length > 1) selector=selector.add(list[el]);
​