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Message: [QUOTE="Robert Dober, post: 4584727"] Hmm seems consistent for me, although the model you expect should have some merits, I believe Smalltalk satisfies your expectations.... However there are no metaclasses in ruby, only singleton classes, naming is important here to emphasis on the difference in behavior. 635/135 > irb irb(main):001:0> a = Class::new => #<Class:0xb7d89750> irb(main):002:0> ma = class << a; self end => #<Class:#<Class:0xb7d89750>> irb(main):003:0> b = Class::new a => #<Class:0xb7d77500> irb(main):004:0> mb = class << b; self end => #<Class:#<Class:0xb7d77500>> irb(main):005:0> b < a => true irb(main):006:0> mb < ma => nil irb(main):007:0> mb.superclass => #<Class:Class> irb(main):008:0> ma.send :define_method, :a do 42 end => #<Proc:0xb7d56724@(irb):8> irb(main):009:0> ma.a NoMethodError: undefined method `a' for #<Class:#<Class:0xb7d89750>> from (irb):9 from :0 Stupid me, of course I defined a method for a irb(main):010:0> a.a => 42 irb(main):011:0> b.a => 42 which works for b too, as b < a irb(main):012:0> mma = class << ma; self end => #<Class:#<Class:#<Class:0xb7d89750>>> irb(main):013:0> mmb = class << mb; self end => #<Class:#<Class:#<Class:0xb7d77500>>> irb(main):014:0> mma.send :define_method, :ma do 42 end => #<Proc:0xb7d3e228@(irb):14> irb(main):015:0> ma.ma => 42 Now this was for ma irb(main):016:0> mb.ma NoMethodError: undefined method `ma' for #<Class:#<Class:0xb7d77500>> from (irb):16 from :0 and as mb < ma does not hold this makes sense. BTW meta caught me I should have called the guys above sa, sb, ssa and ssb :( Interesting that the Pickaxe got this wrong, never publish code you have not run ;), or maybe this changed between 1.6 and 1.8? Cheers Robert [/QUOTE]

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