my jquery snippets

snip.js

$.fn.mapGetter = function(prop) {
    return $(this).map(function(i, e) {
        return $(e).attr(prop);
    }).get();
};

$.fn.filterByAttr = function(attr, val) {
    return $(this).filter(function(i, e) {
        return $(e).attr(attr) == val;
    });
};

var originalAddClassMethod = $.fn.addClass;
var originalRemoveClassMethod = $.fn.removeClass;

$.fn.addClass = function() {
    var result = originalAddClassMethod.apply(this, arguments);
    $(this).trigger('cssClassAdded', arguments);
    return result;
}

$.fn.removeClass = function() {
    var result = originalRemoveClassMethod.apply(this, arguments);
    $(this).trigger('cssClassRemoved', arguments);
    return result;
}

// $(el).syncByClass(other-el)
// when el gets new classes, other-el gets them too
$.fn.syncByClass = function(that) {
    $(this).on('cssClassAdded', function(e, className) {
        if ($(e.target).is(this)) $(that).addClass(className);

    });
    $(this).on('cssClassRemoved', function(e, className) {
        if ($(e.target).is(this)) $(that).removeClass(className);
    });
};

$.fn.removeClassRegex = function(regex) {
  return $(this).removeClass(function(index, classes) {
    return classes.split(/\s+/).filter(function(c) {
      return regex.test(c);
    }).join(' ');
  });
};