iter\IterTest::testReductions PHP Method

    public function testReductions()
    {
        $this->assertSame([1, 3, 6, 10, 15], toArrayWithKeys(reductions(fn\operator('+'), range(1, 5), 0)));
        $this->assertSame([1, 2, 6, 24, 120], toArrayWithKeys(reductions(fn\operator('*'), range(1, 5), 1)));
    }