I just got the svn trunk and was testing some new stuff, but could not find the define_singleton_method: irb(main):001:0> [RUBY_VERSION,RUBY_RELEASE_DATE] => ["1.9.0", "2007-08-28"] irb(main):002:0> a = "" => "" irb(main):003:0> a.define_singleton_method(:foo){|x| x + 1} NoMethodError: undefined method `define_singleton_method' for "":String Running out of irc the same two lines above I get the same results: [taq@~/code/ruby/1.9]ruby1.9 dsm.rb dsm.rb:2:in `method_missing': undefined method `define_singleton_method' for "":String (NoMethodError) from dsm.rb:2:in `<main>' Am I missing something? Thanks! -- Posted via http://www.ruby-forum.com/.