gistfile1.txt

class A
  @@foo = "from A"
end

class B < A
  @@foo = "from B"
end

# What's the value of @@foo in A now...?

class A
  puts @@foo
end

# => from B

# They're shared up the hierarchy??  BOOOO!!!
# What's even worse?  This ->

class C
end

class D < C
  @@bar = "Magically different..."
end

class C
  @@bar = "And delicious."
end

class D
  puts @@bar
  # => Magically different...
end

class C
  puts @@bar
  # => And delicious.
end

# ZOMG THEY'RE NOT SHARED NOW.