From: Daniel Schierbeck <daniel.schierbeck@...>
Date: 2006-08-18T04:50:12+09:00
Subject: Re: How to - Change operator behaviour

Henry Savr wrote:
> Mark Van Holstyn wrote:
>> In your example, you would be calling the method '>' on t1...
>>
>> t1.>(t2)
>>
>> You can define > in the class you would like to have your functionality 
>> in.
>>
>> class Example
>>   def >( other )
>>     #do soem comparison
>>   end
>> end
> 
> 
> Sorry, I see, that my initial question was not asked clearly.
> I know about the "> trick."
> 
> The question actually was:
> 
> I want to redefine a Time method >
> 
> It's new behaviour should be like this:
> 
> class Time1 < Time
>   def >(other)
>     case other.class.name
> 	when "Time"
> 		return self > other # but use the OLD > method definition.
> 	when ("NilClass")
> 		return true
> 	else
> 	      # do what Ruby does originally in this case : 
 >             # when one operand is Time, and other not the Time.
> 	end
> end

   class Time
     def > other
       if other.nil?
         true
       else
         (self <=> other) == 1
       end
     end
   end


Cheers,
Daniel