From: Judson Lester <nyarly@...>
Date: 2008-01-12T06:33:53+09:00
Subject: Re: Loop question

On Jan 11, 2008 12:33 PM, Mark Mr <pimea.mark@gmail.com> wrote:
> I'm trying to figure out an easier way to work with loops in ruby.
> Basically this is what i have now
>
> @this_question.answers.each do |a|
>    missing_flag = true
>    if (a.answer == row[cell])
>       reply.reply = a.id
>       missing_flag = false
>    end
>    if (missing_flag)
>       puts "Not Found"
>    end
> end
>
> Is there any way to avoid using this flag method? I want to put a
> condition on the .each statement that says if no a.answers = row[cell]
> then dont do the reply.reply = a.id. I cant do an else because it would
> run the else after every element in the answers, and i only want it to
> be done after all of them have been run. BTW i'm kind of new to ruby.
> Any suggestions? thanks :)
> --
> Posted via http://www.ruby-forum.com/.

There are a couple of flow control tools you could use.  You could
raise an exception, for instance, or return the value from a method,
and then puts "Not Found" if you complete the loop.  Just because it's
lesser known, though, I'll point out:

catch :found do
  @this_question.answers.each do |a|
    if (a.answer == row[cell])
       reply.reply = a.id
       throw :found
    end
  end
  puts "Not Found"
end

Judson
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