Function f

packages/effect/test/Array.test.ts:76–76

(b: number, a: number)

    it("scan", () => {
      const f = (b: number, a: number) => b - a
      deepStrictEqual(pipe([1, 2, 3], Arr.scan(10, f)), [10, 9, 7, 4])
      deepStrictEqual(pipe([0], Arr.scan(10, f)), [10, 10])
      deepStrictEqual(pipe([], Arr.scan(10, f)), [10])