From: "Nicolas Pouillard" <nicolas.pouillard@gmail.com>
To: Joel Reymont <joelr1@gmail.com>
Cc: Jon Harrop <jon@ffconsultancy.com>,
"O'Caml Mailing List" <caml-list@yquem.inria.fr>
Subject: Re: [Caml-list] List comprehensions
Date: Sun, 19 Aug 2007 12:26:46 +0200 [thread overview]
Message-ID: <1187519133-sup-1765@ert.local> (raw)
In-Reply-To: <34D0D539-54E0-4867-AA9F-5327683004E2@gmail.com>
Excerpts from Joel Reymont's message of Sat Aug 18 16:44:04 +0200 2007:
>
> On Aug 18, 2007, at 3:28 PM, Jon Harrop wrote:
>
> > # [x + 2*x + x/2 | x <- [1; 2; 3; 4]];;
> > - : int list = [3; 7; 10; 14]
>
> How do you do something like this?
>
> [x + 2*x + y/2 | x <- [1; 2; 3; 4], [y <- [3; 4; 5]];;
>
> That is a list comprehension with more than one variable where all
> variables come from lists.
>
Use `;' to separate generators. And you have an extra `['.
[x + 2*x + y/2 | x <- [1; 2; 3; 4]; y <- [3; 4; 5]];;
--
Nicolas Pouillard aka Ertai
next prev parent reply other threads:[~2007-08-19 10:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-18 14:28 Jon Harrop
2007-08-18 14:44 ` [Caml-list] " Joel Reymont
2007-08-18 14:46 ` Jon Harrop
2007-08-19 10:26 ` Nicolas Pouillard [this message]
2007-08-18 14:54 ` skaller
2007-08-20 22:55 ` Nathaniel Gray
2007-08-22 8:54 ` Adrien
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