Here is an example:
class MyClass
end
obj = MyClass.new
obj.instance_eval do
def hello
"hello"
end
end
obj.hello
# => "hello"
obj.methods.grep "hello"
# => ["hello"]
MyClass.instance_methods.grep "hello"
# => []
MyClass's instance methods don't contain 'hello' method, so My question is where Ruby stores the method defined in instance_eval()?