From: Allison Newman Date: 2007-05-28T17:42:15+09:00 Subject: Re: please help me with OptionParser I'm no expert, I've only used OptionParser for simple command parsing, but looking at the documentation, to read an array, you probably need to do something like this: opts.on("--clients x,y,z", Array, "Example 'list' of arguments") do |list| options.client_ids = list end -- Posted via http://www.ruby-forum.com/.