From: Mark Probert <probertm@...>
Date: 2004-08-22T07:45:47+09:00
Subject: Re: Ruby way to update file lines

"Robert Klemme" <bob.news@gmx.net> wrote in
news:2opvm8FddmmgU1@uni-berlin.de: 
> 
> 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?
> 
When I leave them as constants, Ruby complains with the following error:

  deln.rb:37: dynamic constant assignment
        COMMENT = lambda {|key, val| "# #{key}:#{val}" }
                 ^

In the end, it worked out well.  My code snippet looks like:

            # create a function map for the items we want to delete
        comment = lambda {|key, val| "# #{key}:#{val}" }
        delete  = lambda {|key, val| nil }
        checkmap = {}
        @nodelist.each do |n|
            key = "#{n.name}:#{n.ip}"
            checkmap[key] = (@remove) ? delete : comment
        end

Where I now have the option of making the deletion permanent or just 
commenting it out.  Which is perfect for my application.

Regards,

-mark.