From: Robert Klemme <bob.news@...>
Date: 2004-08-22T07:15:54+09:00
Subject: Re: Ruby way to update file lines


"Mark Probert" <probertm@nospam-telus.net> schrieb im Newsbeitrag
news:Xns954C7C2A261F8probertmnospamtelusn@198.161.157.145...
> "Robert Klemme" <bob.news@gmx.net> wrote:
>
> >
> > Some code thoughts below
> >
> > Regards
> >
> >     robert
> >
> >
> > # match keys
> > COMMENT = lambda {|key, val| "# #{key}:#{val}"}
> > DELETE  = lambda { nil }
> >
> > tasks = {
> >   "foo:bar" => COMMENT,
> >   "foo1:bar1" => DELETE,
> > }
> >
> > conf = File.readlines("conf.txt")
> >
> > # manipulate
> > conf.map! do |line|
> >   if /^([^:]+:[^:]+):(.*)$/ =~ line && (fun = tasks[$1])
> >     fun.call $1, $2
> >   else
> >     line
> >   end
> > end
> >
> > # remove deleted lines
> > conf.compact!
> >
> > File.open("conf-1.txt", "w") {|io| io.puts conf }
> >
>
> I liked this one :-)  Thanks.

Thanks, too! :-)

> One minor correction: COMMENT and DELETE should be lower case.  Ruby 1.8
> spits and error about constants otherwise.

They are meant to be constants because they *are* constant.  I just put both
variants into a single file but you'll likely need only one of them, don't
you?

Regards

    robert