Function collect

repos/effect/packages/effect/src/Sink.ts:1539–1543

()

 */
export const sum: Sink<number, number> = reduceArray(() => 0, (s, arr) => {
  for (let i = 0; i < arr.length; i++) {
    s += arr[i]
  }
  return s
})

/**
 * A sink that counts the number of elements fed to it.