reduce()

Reduce an array to a single value using a function.

Implementation

Args: array: The array to reduce func: A function that takes two arguments (accumulator, current value) initial: The initial value for the accumulator (optional) Returns: The reduced value

Example

reduce([1, 2, 3], lambda x, y: x + y, 0)

Expected output: 6

Source Code

                        def reduce(array: List[T], func: Callable[[U, T], U], initial: Optional[U] = None) -> U:
    result = initial
    for x in array:
        if result is None:
            result = x
        else:
            result = func(result, x)  # type: ignore
    return result  # type: ignore
                    