Chunk Array

    // https://stackoverflow.com/questions/8495687/split-array-into-chunks/10456644#10456644
    let perChunk = 3; // items per chunk
    let inputArray = [1,2,3,4,5,6,7,8,9];
    const result = inputArray.reduce((resultArray, item, index) => {
      const chunkIndex = Math.floor(index / perChunk);

      if (!resultArray[chunkIndex]) {
        resultArray[chunkIndex] = []; // start a new chunk
      }

      resultArray[chunkIndex].push(item);

      return resultArray;
    }, []);

    console.log("Chunked Array: ", result);

    return result;