/**
 * Groups elements in chunks of up to `n` elements.
 *
 * @tsplus static Chunk.Aspects grouped
 * @tsplus pipeable Chunk grouped
 */
export function grouped(n: number) {
  return <A>(self: Chunk<A>): Chunk<Chunk<A>> => {
    let gr = Chunk.empty<Chunk<A>>()
    let current = Chunk.empty<A>()

    self.forEach((a) => {
      current = current.append(a)
      if (current.size >= n) {
        gr = gr.append(current)
        current = Chunk.empty()
      }
    })

    if (current.size > 0) {
      gr = gr.append(current)
    }

    return gr
  }
}