AngularJS daterange filter

datefilter.js

RB.filter('daterange', function ()
{
  return function(conversations, start_date, end_date)
	{
		var result = [];

		// date filters
		var start_date = (start_date && !isNaN(Date.parse(start_date))) ? Date.parse(start_date) : 0;
		var end_date = (end_date && !isNaN(Date.parse(end_date))) ? Date.parse(end_date) : new Date().getTime();

		// if the conversations are loaded
		if (conversations && conversations.length > 0)
		{
			$.each(conversations, function (index, conversation)
			{
				var conversationDate = new Date(conversation.date_posted);

				if (conversationDate >= start_date && conversationDate <= end_date)
				{
					result.push(conversation);
				}
			});

			return result;
		}
	};
});