def as_boolean(x, predicate=None):
    """
    Converts the value to a boolean value.

    :param x: The value to be converted to a boolean value.
    :param predicate: The predicate function if required.
    :return: Boolean

    >>> as_boolean(None)
    False
    >>> as_boolean("")
    False
    >>> as_boolean(" ")
    True
    >>> as_boolean(1)
    True
    >>> as_boolean(0)
    False
    >>> as_boolean("1")
    True
    >>> as_boolean("0")
    True
    >>> as_boolean("1", predicate=lambda x: int(x) != 0)
    True
    >>> as_boolean("0", predicate=lambda x: int(x) != 0)
    False
    >>> as_boolean("1", predicate=int)
    True
    >>> as_boolean("0", predicate=int)
    False
    >>> as_boolean("1", int)
    True
    >>> as_boolean("0", int)
    False
    """
    return bool(x if predicate is None else predicate(x))
