Can we modify the method defination once it is defined inside a class?


Suppose I have written the below code:

class Foo

def show

p “Good”



Now is it possible in future to re-open the “show” method again to add
some new logic,once the class Foo has been defined ?

look for alias and alias_method

Hello Xavier,

yes, it is possible. There are three options you have, depending on what
you want:

  • Inheritance: Overwrite the method show in a subclass and then call
    super (if you need the new behavior independently of the old behavior)
  • Alias the old method show to something like “old_show” and then
    redefine show (if you want to call the old method); alias_method and
    alias are the tools for that
  • Just redefine the method (if you don’t need the old method)

Kind regards,


This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs