From: Morton Goldberg <m_goldberg@...>
Date: 2007-05-09T06:34:14+09:00
Subject: Re: Difference answers from Terminal, TextMate, and BBEdit

On May 8, 2007, at 12:52 PM, Brian Candler wrote:

> Ugh, you're right. It doesn't even compare against $_.
> That seems rather pointless, as it's just the same as if ..  
> elsif .. end

AFAIK, a case statement without a target can always be rewritten as a  
if-elsif-else statement, but I don't think that makes a target-less  
case pointless. When there are many conditions to be handled, I find  
the target-less case more readable. A matter of taste, I suppose.

OTOH, the point I wanted to make with the OP was, in his case, with  
only two conditions to be  handled, an if-elsif-else statement would  
be more readable and the better way to go.

> And what about
>
>   case
>   when (1..100)
>     # whatever
>   end
>
> That would be the flipflop operator borrowed from Perl? But with  
> both ends
> true as well?

I think it would work exactly the same as

    if (1..100)
       # whatever
    end

But I haven't tried it. And probably never will -- the flip-flop  
behavior of ranges in a boolean expression is something I avoid as a  
little too tricky.

Regards, Morton