From: "Roland Zumkeller" <roland.zumkeller@gmail.com>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] to merge list of lists
Date: Wed, 7 Mar 2007 15:33:12 +0100 [thread overview]
Message-ID: <d02dcb040703070633ke4ac46er99b434ec2fd848cf@mail.gmail.com> (raw)
In-Reply-To: <200703050853.12223.jon@ffconsultancy.com>
On 05/03/07, Jon Harrop <jon@ffconsultancy.com> wrote:
> # let rec transpose list =
> try map hd list :: transpose (map tl list) with _ -> [];;
Here is a slightly different version that raises an exception if the
given list is not quadratic:
let rec transpose xs =
if for_all ((=) []) xs then [] else
map hd xs :: transpose (map tl xs);;
--
http://www.lix.polytechnique.fr/~zumkeller/
next prev parent reply other threads:[~2007-03-07 14:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-05 6:10 Pietro Abate
2007-03-05 8:37 ` [Caml-list] " skaller
2007-03-05 8:53 ` Jon Harrop
2007-03-05 19:02 ` skaller
2007-03-05 19:40 ` skaller
2007-03-07 14:33 ` Roland Zumkeller [this message]
2007-03-05 9:47 ` Zheng Li
2007-03-05 14:42 ` Zheng Li
2007-03-06 0:07 ` [Caml-list] " Pal-Kristian Engstad
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