def njoiner(inbox, n=None, join=""):
    """
    String joins and returns the first "n" inputs.
    
    Arguments:

     - n(``int``) [default: ``None``] All elements in the inbox smaller then 
       this number will be joined.
     - join(``str``) [default: ``""``] String which will join the elements of 
       the inbox i.e. ``join.join()``.
    
    """
    return join.join(inbox[:n])