From: Hussachai Puripunpinyo <siberhus@...>
Date: 2006-09-20T20:22:52+09:00
Subject: Re: Something strange in ruby or I'm a newbie?

Ryan Davis wrote:
> On Sep 20, 2006, at 3:37 AM, Hussachai Puripunpinyo wrote:
> 
>> puts nil==nil #Yeah that's true
>> puts !nil #true
>> puts !nil==true #true
>> puts nil==false #FALSE !!!
>>
>> What happen in the last statement? [or I miss something]
> 
> nil isn't false. Both nil and false are objects in ruby. Compare:
> 
> % irb
>  >> [nil, false].map { |o| o.object_id }
> => [4, 0]

Thank you Davis.
I assume you told me that "==" mean "compare with object_id that's 
right?
Uhmm.. it's OK in other lang use this idea such as Java

negative of every object(I'm not sure) in ruby except nil and false
is false;
negative of nil and false is true

How about 1 and 1.0 both are the same object?
the rule that I just assume above was broken?

and why every object except nil and false return false
what's the reason? there have already exist in the FAQ?



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