def _snake_to_dromedary_case(string):
    """Convert snake_case to dromedaryCase.

    >>> _snake_to_dromedary_case('snake_case')
    'snakeCase'
    >>> _snake_to_dromedary_case('longer_snake_case_name')
    'longerSnakeCaseName'
    """
    words = string.split("_")
    if len(words) > 1:
        words[1:] = [w.title() for w in words[1:]]
    return "".join(words)