Comparing Ruby Objects based on their instance variables

Compare 2 objects without having to repeat all their variables and potentially miss something, only thing dangerous is adding something like a inline method cache, which would then break equality.

def ==(other)
  self.class == other.class && instance_variables.all? do |i|
    instance_variable_get(i) == other.instance_variable_get(i)
  end
end
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