from typing import Iterable


def _all_solid_values(array):
    """Return boolean to indicate all items are solid values within an array.

    >>> _all_solid_values([1, 2])
    True
    >>> _all_solid_values([0])
    True
    >>> _all_solid_values([[1]])
    False
    >>> _all_solid_values([[1], [2]])
    False
    >>> _all_solid_values([[1], 2])
    False
    """
    return all([not isinstance(item, Iterable) for item in array])