app.filter('partition', function() {
        //cache for non subsequent calls
        var cache = {};

        var filter =  function(arg, len) {

            if(!arg) { return;}

            var chunks = [];

            // create desired number of empty lists
            for(var i=0; i<len; i++){
                chunks.push([]);
            }
            // iterate over elements
            for(var j=0; j<arg.length ;j++)
            {
                chunks[j%len].push(arg[j]);
            }

            //cache for non subsequent calls
            var argString = JSON.stringify(arg);
            var fromCache = cache[argString+len];
            if (JSON.stringify(fromCache) === JSON.stringify(chunks)) {
              return fromCache;
            }
            cache[argString+len] = chunks;

            return chunks;
        };

        return filter;
    });