From: Christophe Raffalli <Christophe.Raffalli@univ-savoie.fr>
To: Su Zhang <westlifezs@gmail.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] a question bout exetract a sub-element of element in triple
Date: Sun, 22 Feb 2009 23:04:12 +0100 [thread overview]
Message-ID: <49A1CBDC.1050205@univ-savoie.fr> (raw)
In-Reply-To: <e2842950902221356o35c3fd3s8d0dbbc0a4152e16@mail.gmail.com>
[-- Attachment #1.1: Type: text/plain, Size: 1554 bytes --]
Su Zhang a écrit :
> I encountered a new problem which is I want to get " 1 " from a triple
> "(0,2,[1,2,3])", which means I want to get the first value of the
> third item in one triple and itself is a list, but when I use the
> List.hd (third(0,2,[1,2,3])), it will give me the entire list which is
> [1,2,3]
> the definition of the third is "let third(x,y,z)=z", so is there a way
> I can get out "1" from "(0,2,[1,2,3])"? if possible, would you please
> give me some advices?
>
> thank you very much
List.hd (third(0,2,[1;2;3])) ?
[1,2,3], is a one element list ...
Cheers,
Christophe
>
> --
> Su Zhang
> ------------------------------------------------------------------------
>
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--
Christophe Raffalli
Universite de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex
tel: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
mail: Christophe.Raffalli@univ-savoie.fr
www: http://www.lama.univ-savoie.fr/~RAFFALLI
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next prev parent reply other threads:[~2009-02-22 22:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-22 21:56 Su Zhang
2009-02-22 22:04 ` Christophe Raffalli [this message]
2009-02-23 9:39 ` [Caml-list] " Florent Ouchet
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