如何从这个嵌套数组中获取值

def get_value_recursive(arr, target):
    for item in arr:
        if isinstance(item, list):
            result = get_value_recursive(item, target)
            if result is not None:
                return result
        elif item == target:
            return item
    return None

nested_array = [1, 2, [3, 4, [5, 6]], 7, [8, [9, 10]]]
target_value = 6
result = get_value_recursive(nested_array, target_value)
print(result)  # 输出：6

def get_value_iterative(arr, target):
    stack = [arr]
    while stack:
        current = stack.pop()
        for item in current:
            if item == target:
                return item
            elif isinstance(item, list):
                stack.append(item)
    return None

nested_array = [1, 2, [3, 4, [5, 6]], 7, [8, [9, 10]]]
target_value = 6
result = get_value_iterative(nested_array, target_value)
print(result)  # 输出：6