how to pass parameters to an alias method in ruby

Question

Hi All,

I want to create a alias method in ruby and pass parameters to this. I managed to do the following

class User
  def say_name
    puts "I'm sameera"
  end
end

class User
  alias :tell_name :say_name
  def say_name
    puts "I'm sameera gayan"
    tell_name
  end
end

user = User.new
user.say_name

and it gives me the out put as

I'm sameera gayan I'm sameera

But now i want to pass my name as a parameter to the first 'say_name' method. So the new code will be like

class User
  def say_name(name)
    puts "#{name}"
  end
end

class User
  alias :tell_name :say_name(name)
  def say_name(name)
    puts "I'm sameera gayan"
    tell_name(name)
  end
end

user = User.new
user.say_name("my new name")

But now this doesn't work (passing parameter to alias method). So my question is how to pass parameters to an alias method.

I hope this question is clear to you. Thanks in advance

cheers

sameera

Answer 1

Hi, I'm learning Ruby. So when I saw this question I decided to try it. Though I have yet to learn about aliasing methods in detail I came across a solution. Don't know if it is the way it should be done. And can't say why it is so yet. May be in a few days after I have learn't in depth I'll add it. For now, here is a working solution.

class User
  attr_accessor :name
  def say_name
    puts "#{name}"
  end
end

class User
  alias :tell_name :say_name
  def say_name
    puts "I'm sameera gayan"
    tell_name
  end
end

user = User.new
user.name = "Sameera"
user.say_name 

This qtn also helped me in the process.

Answer 2

I tried this one and came to this solution

class User

        def say_name(name)

              puts "#{name}"

        end

end

class User

        alias :tell_name :say_name

        def say_name(name)

              puts "Hi"

              tell_name(name)

        end

end

user = User.new

user.say_name("Rohit")

The reason this is working because we cannot pass arguments to aliases. And that is what you were trying to do.