Can I do 'alias' just for instance methods? (SOLVED)

Ruby
1

(SOLUTION added at the end of the posting)

Say someone is giving me a class

class Foo
  def self.bar
  end
  def baz
  end
end

Without touching the original code, I would like to add an instance
method ‘bar’, which behaves exactly like ‘baz’. I can do it like this:

class Foo
  def bar
    self.baz
  end
end

Semantically, this is fine, but it causes one extra redirection step. I
would like to use alias

class Foo
   alias bar baz
end

but this doesn’t work, because ‘bar’ is already a class method.

Any solution for this?

UPDATE: I found the solution for this. It was actually easy - Ruby keeps
of course class methods and instance methods apart, and I can simply do
a

class Foo
  alias :bar :baz
end

and everything works fine. I should have tried it in the beginning, but
I was so sure that it would not work…

2

I think this should work:

class << Foo
alias :baz :bar
end

3

Joel P. wrote in post #1181234:

I think this should work:

class << Foo
alias :baz :bar
end

No, it doesn’t. This would create baz as an alias for the class method
bar.

4

No, it doesn’t. This would create baz as an alias for the
class method bar.

Does not matter.

You can use .instance_eval and .class_eval to modify essentially
everything, even at runtime.

I often do something like this in my classes:

self.instance_eval { alias foo bar }

Simply because I like this more than the

class << Foo

usage.