Jquery plugins to remove classes from elements by regex and to test if at least one element has a class by regex (same behaviour as .hasClass)

jquery.classregex.js

$.fn.removeClassRegex = function(regex) {
	return this.removeClass(function(index, classes) {
		return classes.split(/\s+/).filter(function(c) {
			return regex.test(c);
		}).join(' ')
	});
};
$.fn.hasClassRegex = function(regex) {
	var has = false;
	this.each(function() {
		var classes = $(this).attr('class');
		if (classes == null) {
			return;
		}
		$.each(classes.split(/\s+/), function() {
			if (regex.test(this)) {
				has = true;
				return false;
			}
		});
		if (has) {
			return false;
		}
	});
	return has;
}