ProUnebit
9/7/2018 - 1:35 PM

chunkArray

Split an array into chunked arrays of a specific length ex. chunkArray([1, 2, 3, 4, 5, 6, 7], 3) === [[1, 2, 3],[4, 5, 6],[7]] ex. chunkArray([1, 2, 3, 4, 5, 6, 7], 2) === [[1, 2],[3, 4],[5, 6],[7]]

chunkArray
content_copyfile_download
function chunkArray(arr, len) {
  // SOLUTION 1

  // // Init chunked arr
  // const chunkedArr = [];
  // // Set index
  // let i = 0;

  // // Loop while index is less than the array length
  // while (i < arr.length) {
  //   // Slice out from the index to the index + the chunk length nd push on to the chunked array
  //   chunkedArr.push(arr.slice(i, i + len));
  //   // Increment by chunk length
  //   i += len;
  // }

  // return chunkedArr;

  // SOLUTION 2

  // Init chunked arr
  const chunkedArr = [];

  // Loop through arr
  arr.forEach(val => {
    // Get last element
    const last = chunkedArr[chunkedArr.length - 1];

    // Check if last and if last length is equal to the chunk len
    if (!last || last.length === len) {
      chunkedArr.push([val]);
    } else {
      last.push(val);
    }
  });

  return chunkedArr;
}