From: ts <decoux@...>
Date: 2006-04-19T23:05:11+09:00
Subject: Re: interested in metaprogramming?

>>>>> "R" == Robert Dober <robert.dober@gmail.com> writes:

R> Could not agree more but I am desperately looking for a way to replace this
R> which I use *very* often

 wait for 2.0

R> class Mine
R>      eval <<-EOS
R>      def #{name}( value, &block )
R>            do_something( &block ) if block_given?
R>     end
R>    EOS
R> end


moulon% cat b.rb
#!/usr/bin/ruby
class Mine
   define_method(:a) {|a, &b|
      do_something(a, &b)
   }
   def do_something(a)
      if block_given?
         yield a
      else
         puts "no block #{a}"
      end
   end
end

Mine.new.a(12) {|x| puts "block #{x}" }
Mine.new.a(24)
moulon%
 
moulon% ruby -v b.rb
ruby 1.9.0 (2006-04-08) [i686-linux]
block 12
no block 24
moulon% 


Guy Decoux