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Mar 03

Ruby Pocket Session # 1 - instance_methods

Posted by Massimo Sgrelli in Ruby on Rails - 3 comments digg this add to delicious

Ruby is a wonderful object oriented programming language. The root class is Object which provides a set of very useful methods among which one called instance_methods. It returns an array with all the public methods of the class or the public methods of the module. Retuning an array you can apply normal array’s operators like this:


class Dog
  attr :bark, true
end

irb> Dog.instance_methods - Object.instance_methods
irb> ["bark", "bark="]
(Ref. See Ruby Pocket Reference p. 38)

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Comments

  • marktucks

    Posted on March 03

    Should it be Object.instance_methods?

  • marktucks

    Posted on March 03

    Also, don't mean to crash your post, and don't post these if you were going to in a later post, or even if they are not applicable because you are simply running through Ruby Pocket Reference, but you can also use: methods, private_methods, protected_methods and public_methods :D

  • Massimo Sgrelli

    Posted on March 03

    Sure... Object.instance_methods It was a typing mistake. Thanks Of course you can apply the same principle to every function returning an array as methods, private_methods, protected_methods and public_methods ;)

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