/*
* Splits array into subarrays.
* count parameter indicates that how many item per subarray contains.
* Example usage: splitIntoSubArray([1,2,3,4,5], 2) -> [[1, 2], [3, 4], [5]]
*/
function splitIntoSubArray(arr, count) {
  var newArray = [];
  while (arr.length > 0) {
    newArray.push(arr.splice(0, count)); 
  }
  return newArray;
}