Function countdown

packages/effect/test/Effect/sequencing.test.ts:242–250

(n: number)

  it.effect("zip/parallel - paralellizes simple success values", () =>
    Effect.gen(function*() {
      const countdown = (n: number): Effect.Effect<number> => {
        return n === 0
          ? Effect.succeed(0)
          : pipe(
            Effect.succeed(1),
            Effect.zip(Effect.succeed(2), { concurrent: true }),
            Effect.flatMap((tuple) => pipe(countdown(n - 1), Effect.map((y) => tuple[0] + tuple[1] + y)))
          )
      }
      const result = yield* (countdown(50))
      strictEqual(result, 150)
    }))