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eee-c/gist:123595

Created June 4, 2009 12:35
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gistfile1.txt
bash$ irb
>> class Foo; @@foo = :foo; class << self; def inside_foo; @@foo; end end end
=> nil
>> class << Foo; def outside_foo; @@foo; end end
=> nil
>> Foo.inside_foo
=> :foo
>> Foo.outside_foo
(irb):2: warning: class variable access from toplevel singleton method
NameError: uninitialized class variable @@foo in Object
from (irb):2:in `outside_foo'
from (irb):4
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