From: ThomasW <x.zupftom@...>
Date: 2009-09-28T05:25:09+09:00
Subject: Re: handling of regexp objects that aren't referenced by variables, 	arrays, tables or objects

On 27 Sep., 21:57, Gary Wright <gwtm...@mac.com> wrote:
> On Sep 27, 2009, at 11:50 AM, ThomasW wrote:
>
> > I'm parsing text files and am using a lot of regexps for this.
> > Initially I was doing something like this:
>
> > file.each_line { |line|
> >  if line =~ /^pattern[a]*/
> >    process_pattern_a(line)
> >  elsif line =~ /pat+e(rn)? b\s*$/
> >    process_pattern_b(line)
> >  # some more elsifs
> >  end
> > }
>
> This example is perfect for Ruby's case statement:
>
> file.each_line { |line|
>    case line
>    when /^pattern[a]*/o
>     process_pattern_a(line)
>    when /pat+e(rn)? b\s*$/o
>     process_pattern_b(line)
>    # more when clauses
>    else
>      # handle no match
>    end
>
> }
>
> Gary Wright

Thanks for that tip.  I wasn't aware that this also works with regexp
matches.  It's great that it does!  By the way, is there anything
substantially different from an elsif chain, except for being slightly
less typing?

Thomas W.