Function groupByEveryN

Libraries/Utilities/groupByEveryN.js:30–50

(array: Array<T>, n: number)

'use strict';

function groupByEveryN<T>(array: Array<T>, n: number): Array<Array<?T>> {
  var result = [];
  var temp = [];

  for (var i = 0; i < array.length; ++i) {
    if (i > 0 && i % n === 0) {
      result.push(temp);
      temp = [];
    }
    temp.push(array[i]);
  }

  if (temp.length > 0) {
    while (temp.length !== n) {
      temp.push(null);
    }
    result.push(temp);
  }

  return result;
}

module.exports = groupByEveryN;