From: Arlen Cuss <celtic@...>
Date: 2008-02-21T20:09:11+09:00
Subject: Re: Reusing the existing code.

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Hi,

On Thu, Feb 21, 2008 at 10:04 PM, MohsinHijazee <mohsinhijazee@gmail.com>
wrote:

> Hi!
>   I have a new class which needs to reuse the code in two classes.
> But I can only derive it from one class. How should I go about it then?
>
>
Perhaps they should be modules instead? Mix-in with `include' (which makes
the module's methods instance methods) or `extend' (which makes them class
methods).

>> module A
>>   def hi; puts "hi"; end
>> end
=> nil
>> module B
>>   def hey; puts "hey"; end
>> end
=> nil
>> class C
>>   include A
>>   extend B
>> end
=> C
>> C.new.hi
hi
=> nil
>> C.hey
hey
=> nil
>>

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