From: "Einar Magnús Boson" <einarmagnus@...>
Date: 2008-11-17T16:57:53+09:00
Subject: Re: How can I overload a method in Ruby

I find that overriding is much more powerful. You can override just  
about any method.
Try

class Fixnum
	def to_s
		"this is kinda stupid"
	end
end

puts 5

Overloading is mostly used for default arguments anyways isn't it? and  
also requires static typing I think.



Einar Magnús Boson
+354-661 1649
einarmagnus@tistron.se
einar.boson@gmail.com

On 17.11.2008, at 07:50 , Zhao Yi wrote:

> Einar Magnús Boson wrote:
>> there is no overloading, only overriding.
>>
>>
>> You can have variable number of arguments by writing
>>
>> def fun(*params)
>>   #here params is an array of your arguments, [] if none.
>> end
>>
>> you can also have a default value for your parameter:
>>
>> class Impl
>>  include MyModule
>>
>>  def fun(directory = "")
>>       puts "fun #{directory}"
>>  end
>>
>> end
>> m=Impl.new()
>> m.fun()
>> # >> fun
>> m.fun "/dev/null"
>> # >> fun /dev/null"
>
> ok I understand. Just curious, overload is a good feature in OO
> programming. Why doesn't Ruby support it? If I use the method you
> mentioned, I have to check the parameters and use if - else or swith  
> to
> distinguish them.
> -- 
> Posted via http://www.ruby-forum.com/.
>