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Alex Rivera
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I would like to test whether a class inherits from another class, but there doesn't seem to exist a method for that. class A end class B < A end B.is_a? A => false B.superclass == A => true (N.B. the is_a? test above does not make any sense, as the first comment correctly points out B.new.is_a?(A) would make sense, but is not generally applicable, as not every class has a #initialize method that accepts 0 arguments) A trivial implementation of what I want would be: class Class def is_subclass_of?(clazz) return true if superclass == clazz return false if self == Object superclass.is_subclass_of?(clazz) end end but I would expect this to exist already.
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