Select and apply class to multiple divs with same class

Question

I have a list of items with markup that looks similar to this:

<article class="day past">
  <div class="schedule schedule-261 event">
    <h4>Title</h4>
    <p>Lorem ipsum...</p>
  </div>
</article>
<article class="day past">
  <div class="schedule schedule-283 event">
    <h4>Title</h4>
    <p>Lorem ipsum...</p>
  </div>
</article>
<article class="day past">
  <div class="schedule schedule-290 event">
    <h4>Title</h4>
    <p>Lorem ipsum...</p>
  </div>
</article>
<article class="day past">
  <div class="schedule schedule-261 event">
    <h4>Title</h4>
    <p>Lorem ipsum...</p>
  </div>
</article>
<article class="day past">
  <div class="schedule schedule-290 event">
    <h4>Title</h4>
    <p>Lorem ipsum...</p>
  </div>
</article>
<article class="day past">
  <div class="schedule schedule-300 event">
    <h4>Title</h4>
    <p>Lorem ipsum...</p>
  </div>
</article>
<article class="day past">
  <div class="schedule schedule-261 event">
    <h4>Title</h4>
    <p>Lorem ipsum...</p>
  </div>
</article>

The schedule-NUMBER class is assigned based on the item's ID in a database. Basically, this is markup from a calendar that has repeating events, so some of the events will share the same database record.

If an item is "repeating" (ie. more than one div with schedule-261 exists), I'd like to add/remove an extra class on hover in/out for all of schedule-261 divs. If an item is not "repeating" (ie. there's only one div with schedule-283 ), then no extra class is applied on hover.

jQuery is the library of choice for this particular project, so a jQuery solution is preferred.

Thanks!

Answer 1

$(".schedule").each(function() {
    var cls = (this.className.match(/schedule-\d+/) || []).pop();
    if (cls.length === 0) return;

    var els = $(".schedule." + cls);
    if (els.not(this).length > 0) {
        els.hover(function() {
            els.addClass("someClass");
        }, function() {
            els.removeClass("someClass");
        });
    }
});

DEMO: http://jsfiddle.net/DSYpA/

Answer 2

$('article .schedule').on('mouseover', function () {

    var s = $(this); 
    if(s.size()>1) {
       s.addClass('myHoverClass');
    }

});

Answer 3

Find the "schedule-[Number]" class and add the styling class:

$(".schedule").on("someevent", function(){
    var className = this.className;
    var classes = className.split(" ");
    for(var i=0;i<classes.length;i++)
    {
        var cls = classes[i];
        if (cls.indexOf("schedule") != -1 && cls.replace("schedule").length !== 0 && $("." + cls).length > 1)
        {
              $("." + cls).addClass("whatever");
        }
    }
});

Answer 4

$('.schedule').each(function()
{
   var s=this.className.split(/\s+/).filter(function(w){return /schedule-\d+/.test(w);});
   if (s && $('.' + s).length > 1) $('.' + s).addClass('yourclass');  
});