From: Hugh Sasse Staff Elec Eng <hgs@...>
Date: 2002-07-10T19:42:30+09:00
Subject: Re: Case expressions and LHS of assignment....

On Wed, 10 Jul 2002, Pit Capitain wrote:

> On 10 Jul 2002, at 19:01, Hugh Sasse Staff Elec Eng wrote:
>
> > On Wed, 10 Jul 2002, Peter Hickman wrote:
> >
> > You're taking the contrived, cut-down example too literally :-).  The
> > numbers were easier to type to test this out,  I was using symbols in
> > fact, :x, :y, and :z  in the first place, but the problem is more
> > general than that because a case statement can be used with anything
> > that copes with ===.
>
> You can still use a similar approach using a hash with symbols as
> keys. In the assignment, use the case expression to detemine the
> key. Something like
>
> def initialize
>   @values = Hash.new( "Initial" )
> end
>
> def assign( x, y )
>   @values[
>     case x
>     when ...
>       :x
>     when ...
>       :y
>     else
>       :z
>     end
>   ] = y
> end

Good point.  I like this one.  Thank you.
>
> Regards,
> Pit
>
        Hugh