Ramda receipts

ramdaReceipts.js

const partitionBy = (f, collection) => {
  const r = collection.reduce(({result, currentPartition, partitions}, item) => {
    const newResult = f(item)
    if (result != undefined && result != newResult) {
      return {result: newResult, currentPartition: [item], partitions: R.append(currentPartition, partitions)}
    }
    return {result: newResult, currentPartition: R.append(item, currentPartition), partitions}
  }, {result: undefined, currentPartition:[], partitions: []})
  return R.append(r.currentPartition, r.partitions)
}

// partitionBy works like Clojures partition-by