I understand that def is a keyword and can't be overridden.
But is there a way to call a method when a method gets registered with a class(passing in the name of the method being created?)
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3 Answers
That's what the Module#method_added hook method is for:
module Foo
def self.method_added(meth)
p meth
end
def bar; end
end
# :bar
1 Comment
Roman A. Taycher
So would this print the name of each method that was added to a class where this was mixed in?
To create a mixin with that hook:
module Foo
def method_added(method_name)
puts "method #{method_name} added"
end
end
class Bar
extend Foo
def some_method
end
end
Notice that method_added is class method (strictly class Class instance instance method sic!), since it is defined in Module class. So we have to add it with extend so it goes to Bar metaclass.
Comments
If I understand your question correctly,
class_instance.send(method_name)
should do it
1 Comment
Roman A. Taycher
Isn't that just the equivalent of object.method() ? I'm looking to automatically cal a method every time I define a new method in a class.