Function flatRollup

flatRollup<TObject, TReduce, TKeys>(iterable, reduce, ...keys): [...TKeys, TReduce][]
Equivalent to rollup, but returns a flat array of [key0, key1, …, value] instead of nested maps.
Type Parameters
- TObject
- TReduce
- TKeys extends unknown[]
Parameters
- iterable: Iterable<TObject>
  The iterable to group.
- reduce: ((values) => TReduce)
  The reduce function.
  - - (values): TReduce
    - Parameters
      values: TObject[]
      Returns TReduce
- Rest ...keys: {
  [Index in string | number | symbol]: ((value, index, values) => TKeys[Index])
  }
  The key functions.
Returns [...TKeys, TReduce][]