method
<
<(p1)
public
Returns true if mod is a subclass of other. Returns nil if there’s no relationship between the two. (Think of the relationship in terms of the class definition: "class A<B" implies "A<B").
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mcmire -
January 11, 2010
0 thanks
Includes descendants
May be helpful to know that this returns true if A is any descendant of B, not just a direct one. As an example:
class Foo; end class Bar < Foo; end class Baz < Bar; end Bar < Foo #=> true Baz < Foo #=> true
If you want direct descendance try Class#superclass:
Bar.superclass == Foo #=> true Baz.superclass == Foo #=> false