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Postings from September 2002
Re: Paren madness (was Re: Regex query)
From:
Jonathan Scott Duff
Date:
September 23, 2002 18:50
Subject:
Re: Paren madness (was Re: Regex query)
Message ID:
20020923205000.A2786@cbi.tamucc.edu
On Mon, Sep 23, 2002 at 04:58:55PM -0400, Trey Harris wrote:
> for (1,("a","b","c"),3 { ... }
>
> and
>
> for 1,("a","b","c"),3 { ... }
>
> Now that I've ventured away from DWIMs and more into WIHDTEMs (What In
> Hell Does This Expression Mean), is the above equivalent to
>
> for 1,qw(a b c), 3 { ... }
>
> as well?
I'd expect all 3 to mean exactly the same thing.
> A final unresolved question. I take it that the splat operator is a
> deeply flattening operator. For instance,
>
> *[1,[2,[3,4,5]],6]
>
> will be converted into
>
> [1,2,3,4,5,6]
What other operator acts recursively in this fashion? None that I know
of. If someone wants the recursive behavior, they can redefine the
operator appropriately.
Besides, with the ^ operator, you can already express arbitrary
levels:
*[1,[2,[3,4,5]],6] # 1,[2,[3,4,5]],6
^*[1,[2,[3,4,5]],6] # 1,2,[3,4,5],6
^^*[1,[2,[3,4,5]],6] # 1,2,3,4,5,6
et cetera. :-)
-Scott
--
Jonathan Scott Duff
duff@cbi.tamucc.edu