From: Stephen White <spwhite@...>
Date: 2001-08-23T05:22:24+09:00
Subject: [ruby-talk:20119] Re: The Ruby Way [was: Ruby Article]

On 22 Aug 2001 15:23:01 +0900, Ryo Furue wrote:
> > > II) Use catch/throw for control structures, use rescue/raise for
> > >     communicating errors.
> [...]
> > >       catch (:done) do
> > >         loop do
> > >           # Note: prompt_and_read can throw :done
> > >           first_name = prompt_and_read "First name"
> > >           last_name  = prompt_and_read "Last name"
> > >           phone      = prompt_and_read "Phone"
> > > 
> > >           myfile.puts first_name + "\t" + last_name + "\t" + phone
> > >         end
> > >       end


Next iteration through this little loop... :)

File.open('phonespec.txt', 'a') do |myfile|
  questions = ["First name", "Last name", "Phone"]

  more = true
  while (more)
    answers = []
    if questions.find do |prompt|
      print prompt + ': '
      answers << str = gets ? $_.chop : 'END'
      str == 'END'
    end then
      more = false
    else
      myfile.puts answers.join("\t")
    end
  end  
end

No more throw/catch, and a cute way of chopping input.

I tried to use a Range in the while() condition, but it seems to re-run
the whole Range rather than keeping track as if it were in an 'if'. It
seemed like a bug to me but I'm not sure. I'm using 1.6.2 so it's
probably already been fixed if it were a bug.