pedro:~$ irb
irb> class A ;end

irb> class B ;end

irb> class C ;end

irb> A = B
(irb):4: warning: already initialized constant A
=> B

irb> class C
irb>   def self.hello
irb>      puts "hello"
irb>   end
irb> end


irb> B = C
(irb):11: warning: already initialized constant B
=> C


## Testing the hello static method

irb> A.hello
NoMethodError: undefined method `hello' for B:Class
	from (irb):16
	from :0

irb> B.hello
hello

irb> C.hello
hello

## Classes
pedro:~$ irb

irb> class A ; end
irb> class B ; end
irb> class C ; end

irb> A = B
(irb):4: warning: already initialized constant A
=> B

irb> B = C
(irb):5: warning: already initialized constant B
=> C

irb> A == B  #=> false
irb> B == C  #=> true
irb> A == A  # => true