chunk.js

const chunk =
  (maximum) =>
    (list) =>
      reduceWithValueKey(
        (accumulated) =>
          (item) =>
            (index) => {
              const [latestChunk, ...previousChunks] = accumulated;

              if ((length(latestChunk) !== maximum) && (length(list) === index + 1)) {
                return reverse([[...latestChunk, item], ...previousChunks]);
              }

              if (length(list) === index + 1) {
                return reverse([[item], ...accumulated]);
              }

              if (length(latestChunk) !== maximum) {
                return [[...latestChunk, item], ...previousChunks]
              }

              return [[item], ...accumulated];
            }
      )(
        [[]]
      )(
        list
      )