How to add statements to an existing method definition in Ruby

Question

I noticed for the class definition, if I open up the class MyClass, and add something in between without overwrite I still got the original method which defined earlier. The new statements added augment the existing one.

But as to the method definition, I still want the same behavior as the class definition, but it seems when I open up the def my_method, the exiting statements within the def and end is overwritten, I need to rewrite that again.

So is there any way to make the method definition behave the same as definition, something like super, but not necessarily is the sub-class?

This is largely a duplicate of [When monkey patching a method, can you call the overridden method from the new implementation](http://StackOverflow.Com/questions/4470108/when-monkey-patching-a-method-can-you-call-the-overridden-method-from-the-new-im/4471202/#4471202). — Jörg W Mittag, Aug 06 '11 at 14:40

score 10 · Accepted Answer · answered Aug 06 '11 at 12:21

10

I suppose you are looking for alias_method:

class A
  alias_method :old_func, :func

  def func
    old_func # similar to calling 'super'
    # do other stuff
  end
end

answered Aug 06 '11 at 12:21

emboss

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How to add statements to an existing method definition in Ruby

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