def list_to_comma_delimited(list_param):
    """Convert a list of strings into a comma-delimited list / string.

    :param list_param: A list of strings.
    :type list_param: list
    :return: Comma-delimited string.
    :rtype: str
    """
    if list_param is None:
        list_param = []
    return ','.join(list_param)