From: David Alan Black <dblack@...>
Date: 2001-11-06T03:08:50+09:00
Subject: [ruby-talk:24409] Re: Help with OO

H3ll0 --

On Tue, 6 Nov 2001, Vincent Foley wrote:

> Hi, I'm a bit new to OO programming and I would need help.  I made a
> small (and useless) program to convert a string to l33t speech.  But the
> method I used, I think it's a bit too imperative (we're in a OO
> language, right?).  So here's the code, and I'll explain what I want to
> do after the code:
>
> [code]
>
> #!/usr/bin/env ruby
>
> def l33t(message)
>   message.tr!('eE', '3')
>   message.tr!('aA', '4')
>   message.tr!('lL', '1')
>   message.tr!('oO', '0')
>   message.tr!('tT', '7')
>   message.tr!('sS', '$5')
>
>   return message
> end
>
> print "Enter string to translate: "
> x = STDIN.gets.chomp!
> puts l33t(x)
>
> [/code]
>
> look at the last line, how would I do to do 'puts x.l33t'?

Well, this is sort of a variant of what you're asking for,
but it was fun to write :-)

   module L33T
     # Slightly ineff[ective,icient] for inverting, but anyway
     TRANSLATIONS = {
       'Ee' => '33',
       'Aa' => '44',
       'Ii' => '11',
       'Oo' => '00',
       'Tt' => '77',
       'S'  => '5',
       's'  => '$'
     }

     def translate(table)
       table.each do |from,to|
	 tr!(from,to)
       end
       self
     end

     def uncool_to_cool
       translate(TRANSLATIONS)
     end

     def cool_to_uncool
       translate(TRANSLATIONS.invert)
     end
   end

   class L33T57R1ng < String
     include L33T

     def initialize(s)
       super
       uncool_to_cool
     end

   end

   if __FILE__ == $0
     s = L33T57R1ng.new("Hello, most excellent dude")
     p s
     p s.cool_to_uncool
   end


David

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