What’s the easiest(simplest) code to find a class/module that first
defines a specific method?
I became curious while I was looking for a document of Array#partition
Actually the method is defined in Enumerable module.
But I couldn’t guess that it was defined there until I checked Array
class’s doc first.
If the inheritance(or mixin) hierarchy is very complex, it will take
long to find a method.
The one I can think of is using MyClass.ancestors and
MyClass.instance_methods recursively (or repeatedly).
Is there a better way?
(On my second thought, singleton classes should also be considered,
The method prototype might be like…
#returns a class or module which defines the method
def defined_where(obj, method_name)