Ruby Anonymous Class Possibilities

#
# After a discussion about the cool groovy syntax for
# declaring anonymous classes. Jim Weirich and I came up 
# with the following solutions in Ruby.
#
# Requires: Ruby 1.9
#
def run(x)
  x.foo
end

class Object
  def anon(name, &block)
    Class.new do
      define_method name, block
    end.new
  end
end

run( anon(:foo) { puts "IN FOO from Object method" } )

class Symbol
  def def(&block)
    the_symbol = self
    Class.new do
      define_method the_symbol, block
    end.new
  end
end

run( :foo.def { puts "IN FOO from Symbol" } )

class Proc
  def named(name)
    the_proc = self
    Class.new do
      define_method name, the_proc
    end.new
  end
end

run -> { puts "IN FOO from Proc"  }.named(:foo)

class Hash
  def anon
    the_hash = self
    Class.new do
      the_hash.each do |name, function|
        define_method(name) { function.call }
      end
    end.new
  end
end

run( { foo: -> { puts "IN FOO from Hash" } }.anon )