[Caml-list] Removing an element from a list

[Caml-list] Removing an element from a list

[Vincent Foley]

Hi,

I would like to know how to remove an element from a list.  For example,
I would like to remove 3 in this list: [1; 2; 3; 4; 5].  How would I do
it?

Vince

-- 

Vincent Foley-Bourgon
Email: vinfoley@iquebec.com
Homepage: http://darkhost.mine.nu:81
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RE: [Caml-list] Removing an element from a list

[Paul Steckler]

> I would like to know how to remove an element from a list.  For
> example,
> I would like to remove 3 in this list: [1; 2; 3; 4; 5].  How would I
> do
> it?

How you'd do it depends *why* you want to remove it.  Because it is a 3,
or because it's the third element in the list, or some other reason?

-- Paul


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Re: [Caml-list] Removing an element from a list

[YAMAGATA yoriyuki]

From: Vincent Foley <vinfoley@iquebec.com>
Subject: [Caml-list] Removing an element from a list
Date: Fri, 28 Jun 2002 15:39:52 -0400

> I would like to know how to remove an element from a list.  For example,
> I would like to remove 3 in this list: [1; 2; 3; 4; 5].  How would I do
> it?

List.filter (fun e -> e <> 3) [1; 2; 3; 4; 5]

This creates the new list [1; 2; 4; 5] and does not modify the original
[1; 2; 3; 4; 5].  In caml, operations on lists is never destructive
(unlike lisp).

--
Yamagata Yoriyuki
http://www.mars.sphere.ne.jp/yoriyuki/
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Re: [Caml-list] Removing an element from a list

[Tomasz Zielonka]

On Sat, Jun 29, 2002 at 05:10:24AM +0900, YAMAGATA yoriyuki wrote:
> List.filter (fun e -> e <> 3) [1; 2; 3; 4; 5]

Or shorter:

List.filter ((<>) 3) [1; 2; 3; 4; 5]

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