Split Array By

gistfile1.js

/**
 * Adds empty elements to an array
 * 
 * @example
 *   A1: hello
 *   A2: world
 *
 *   =splitArrayBy(A1:A2, 3)
 */
function splitArrayBy(array, n) {
  var result = [];
  for (var i = 0; i < array.length; i++) {
    result.push(array[i]);
    for (var j = 0; j < n; j++) {
      result.push([]);
    }
  }
  return result;
}