> Date: Fri, 11 Oct 2002 12:16:00 -0700 (PDT)
> From: Larry Wall <[EMAIL PROTECTED]>
>
> I'm wondering whether the single ones could indicate parallel streams.
> We had the difficulty of specifying whether the C<for> loop should
> terminate on the shorter or the longer stream. We could say that |
> terminates on the longer, and & on the shorter. Possibly there's
> some relationship with any() and all() in there as well. The | could
> generally be construed as a comma that doesn't guarantee ordering.
> So cases could be written
>
> when 1 | 2 | 3 {...}
>
> as well as with comma. Saying
>
> when 1 & 2 & 3 {...}
>
> might be short for
>
> when all(1,2,3) {...}
Aha! Superpositions. | is for any, & is for all. That works :).
Some of my students want to go:
if ($x == 1 || 2) { ... }
Now they can:
if $x == 1 | 2 { ... }
It reads well in english (which I am a strong supporter of). Better
than "if x equals any one two." I do very much like this idea.
Luke
