From: Robert Dober <robert.dober@...>
Date: 2008-04-19T05:32:23+09:00
Subject: Re: How to "break" a "case-when" ?

On Thu, Apr 17, 2008 at 4:14 PM, Robert Klemme
<shortcutter@googlemail.com> wrote:
> 2008/4/17, Stefan Lang <perfectly.normal.hacker@gmail.com>:
>  > 2008/4/17, Iņaki Baz Castillo <ibc@aliax.net>:
>  >
>  > > 2008/4/17, Stefan Lang <perfectly.normal.hacker@gmail.com>:
>
>
> > Well, since Ruby doesn't support it, you must find other
>  >  ways to structure the code in each case. Exceptions might
>  >  help in the bigger picture, splitting it up in smaller methods, etc.
>  >
>  >  You can use catch/throw for this:
>
>  I would recommend using an "ordinary" exception - because that's what it is.
I would recommend not to use an exception at all.

If I had the problem I would try to the following things in that order:
(a) restructure your case if this makes it more readable
(b) if not a local exit might make the code quite readable,
     if the case is used in a loop that well be "next", if the case is
a method body, which is often the case use "return"
(c) if neither (a) or (b) provide some appealing code, try to refactor
the case into a method
(d) and only if (c) makes no sense either use
     catch(:mylocalexit){
            case....
               throw :mylocalexit
     }

HTH
Robert

-- 
http://ruby-smalltalk.blogspot.com/

---
Whereof one cannot speak, thereof one must be silent.
Ludwig Wittgenstein