optparse question: how to warn of missing positional arguments

Artie Ziff <[email protected]>
Newsgroups gmane.comp.lang.ruby.general
Message-ID <CAP0EqC-qK01B6irRjDpAdqk4U-XTzMNQYHkjFYDDQmYWJ2wbhQ@mail.gmail.com> 
Hello,

My goal is to force a display of the banner (usage string) when a
positional parameter is not present; in the sense of ARGV[1] == nil

An possible way would be to force the OptionParse.new block parse to fail
if ARGV[1] == nil. How to do this properly in Ruby?

I love Ruby so much! Thx all!
az


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