function mergeArray(from, receiver){
        var j = from.length,
            tempItem;
        while(j-- > 0) {
            tempItem = from[j];
            if(tempItem && !isContains(receiver, tempItem)) {
                receiver.push(tempItem);
            }
        }
        return receiver;
    }
Merge array
@author Dariel Noel <darielnoel@gmail.com>
@since  2014-09-14
@return {[type]}   [description]