From: Just Another Victim of the Ambient Morality <ihatespam@...>
Date: 2006-08-29T11:20:10+09:00
Subject: Re: A newbie question about case and ===


"Eero Saynatkari" <eero.saynatkari@kolumbus.fi> wrote in message 
news:f6a9600f8e87240669e788b674456558@ruby-forum.com...
> Sonny Chee wrote:
>>
>> I read that the case statement uses the === method for comparison of
>> each of its clauses.  So, why doesn't the second comparison in the
>> following code snippet evaluate identically?
>>
>> a_fix_num = 1
>> puts a_fix_num.class
>> case a_fix_num
>> when Integer
>> puts 'Yes, this is an Integer subclass'
>> else
>> puts 'No, this is not an Integer subclass'
>> end
>>
>> if a_fix_num === Integer
>> puts 'Yes, this is an Integer subclass'
>> else
>> puts 'No, this is not an Integer subclass'
>> end
>
> case actually evaluates the other way.
>
> Integer === a_fix_num   # true

    That is hilarious!
    It's obvious when you think about it but, otherwise, it's very 
surprising...