From: ahoward <ahoward@...>
Date: 2003-05-15T04:46:08+09:00
Subject: Re: ruby_run() w/o exit?

On Thu, 15 May 2003 dblack@superlink.net wrote:

> Ara, in cases like this you might have to compromise on the boycotting of
> parentheses :-)

sheesh.  first matz, now you.  poetry moders unite!

i think this was the first (and last!) time i'll post code without running
it.  you guys keep a fella on his toes!  ;-)

this is perhaps more appropriate - and it runs:

----CODE----
  require 'singleton'

  class Language
    class MemoryLeakError < StandardError
      attr :lang
      def initialize(lang, *a); @lang = lang; super *a; end
    end
    attr :name
    alias to_s name
    def initialize name; @name = name; end
  end

  class AHoward
    include Singleton
    attr :langs

    def initialize
      @langs = %w(ruby c perl java idl bash sh zsh tcsh csh fortran c++)
      @langs.map!{|l| Language.new l.gsub /[+]/, '-'}
    end

    def rank lang
      raise Language::MemoryLeakError.new lang if /--$/.match lang.name
      raise NotImplementedError unless i = langs.index(lang)
      return i
    end
  end


  ara = AHoward.instance

  begin
    ara.langs.map{|l| puts "%8.8s : %s" % [l, ara.rank l]}
  rescue Language::MemoryLeakError => leak
    STDERR.puts "LEAK FROM %s!" % leak.lang
    raise
  end

----CODE----

~/eg/ruby > ruby ahoward.rb
    ruby : 0
       c : 1
    perl : 2
    java : 3
     idl : 4
    bash : 5
      sh : 6
     zsh : 7
    tcsh : 8
     csh : 9
 fortran : 10
LEAK FROM c--!
ahoward.rb:23:in `rank': Language::MemoryLeakError (Language::MemoryLeakError)
        from ahoward.rb:32
        from ahoward.rb:32:in `map'
        from ahoward.rb:32:in `each'
        from ahoward.rb:32:in `map'
        from ahoward.rb:32



-a





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  | Ara Howard
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