From: Robert Klemme <shortcutter@...>
Date: 2008-08-01T03:49:12+09:00
Subject: Re: File manipulation

On 31.07.2008 20:22, Tim Mcd wrote:
> So, I am currently working on a MUD (Online multiplayer text based game,
> like an MMO). The MUD's scripting language is LPC. I am trying to create
> a ruby script, that reads another ruby file, and changes all instances
> of 'Sword-of-might = Sword.new(...)' to something like 'static void
> create() {...}'. Nothing too fancy, just me being able to go through a
> file finding different bits of ruby that I can then replace with the
> equivalent LPC code.
> 
> An example of how it might work is: Ruby has a table of ruby phrases and
> what to turn them into if encountered. Ruby then reads the given file,
> and if it finds any of the given phrases, turns them into the
> corresponding LPC that I have defined.
> 
>   So, the problem is, I have no idea how to go about doing something
> like this in Ruby. Any thoughts/help or places to look? (tutorials,
> etc.)

Depends how many phrases you got there.  If there are just a few of them 
and they are fixed, you can do something like this:

phrases = {
   "foo" => "bar",
   "baz" => "boo!",
}

dat = File.read input_file

dat.gsub! Regexp.union(phrases.keys) do |m|
   phrases[m] or raise "Phrase not found: #{m.inspect}"
end

File.open out, "w" do |io|
   io.write dat
end

Kind regards

	robert