From: "Bob Schäfer" <bob-clruby@...>
Date: 2008-12-10T02:18:28+09:00
Subject: Re: newbie's question: getting parameters given to hello.rb

L. Maiwald wrote:
> Tim Hunter wrote:
>
>> The arguments are in the ARGV array. ARGV[0] is the first argument,
>> ARGV[1] the second, and so forth.
>
> thank you!

additionally, sometimes it's helpful to know the number of arguments
sent in with

ARGV.size

when my shell-style ruby scripts are dependent on arguments, i include a
line at the top like this:

raise 'usage: rubycat.rb file1 file2' if ARGV.size == 0