bind is useful as a curry that's built-in, but I always pass `null` as the first argument. not a huge fan of the `new` keyword in js; it's difficult to mock an

bind is useful as a curry that's built-in, but I always pass `null` as the first argument. not a huge fan of the `new` keyword in js; it's difficult to mock and there are better options (Object.create/freeze e.g.)