If I define a method in Ruby, does it belong to any class?

I have feeling, that if one defines a method

def test
  puts 'Hi'
end

then there is a class to which this method belongs to (i.e. Unknown#test). So one probably has a possibility to list all methods defined开发者_开发技巧 "outside" of other classes. Or there is another way to do such listing?

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If you define a method outside of any class, it will become a private method of the Object class.

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A top-level method is a private method of Object. Check out this question.

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In future, to find what object a method belongs to, do this:

method(:test).owner

Output, for your example is Object

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And you can then list all the methods of Object with

Object.send(:methods)

or

Object.send(:private_methods)