From: James Britt <jamesUNDERBARb@...>
Date: 2004-08-14T05:42:09+09:00
Subject: Re: Question: A method for summing several variables

Yet Another Version

$SAFE = 3

# See
# http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/13402
# for ArrayMD
class ArrayMD < Array
   def [](n)
     self[n]=ArrayMD.new if super(n)==nil
      super(n)
   end
end

class FieldWrapper
   def initialize(  )
     @data  = ArrayMD.new( )
   end

   def [](box_name)
     x, y = get_indices( box_name.to_s )
    @data[x][y][0]
   end

   def method_missing( name, *args )
     raise( "Unknown method #{name}") unless name.to_s =~ /^box/
     unless ( name.to_s =~ /=/ )
        x, y = get_indices( name.to_s )
        @data[x][y][0]
     else
       name = name.to_s.gsub( '=', '' )
        x, y = get_indices( name.to_s )
        @data[x][y]   = args
     end

   end

   def get_indices( box_name )
     s = box_name.gsub( "box", '')
     parts = s.split( '_' )
     return [parts[0].to_i, parts[1].to_i]
   end
end


fw = FieldWrapper.new

fw.box1_1 = 23
p fw.box1_1

fw.send( "box1_2=", 12)
p fw[ "box1_2" ]