From: "Anton Moscal" <msk@mail.tepkom.ru>
To: "Oleg" <oleg_inconnu@myrealbox.com>
Cc: <caml-list@inria.fr>
Subject: Re: [Caml-list] Doubly-linked list
Date: Tue, 13 Aug 2002 19:11:40 +0400 [thread overview]
Message-ID: <012001c242db$ba4c9f90$2be213c3@youngkouzdra> (raw)
In-Reply-To: <200208131430.KAA23206@hickory.cc.columbia.edu>
Hello, Oleg!
You wrote to "Diego Olivier Fernandez Pons"
<Diego-Olivier.FERNANDEZ-PONS@cicrp.jussieu.fr> on Tue, 13 Aug 2002
10:30:59 -0400:
O> Will it include imperative doubly-linked list or are all data types
O> going to
O> be purely functional? It's hard for me to think of an efficient
O> purely functional doubly-linked list.
For example:
type 'a dll = 'a list (* before *) * 'a * 'a list (* next *)
let ins_after elem (bef, cur, aft) = (cur::bef, elem, aft)
let next = function (bef, cur, (cur'::aft)) -> Some ((cur::bef), cur', aft)
| _ -> None
let prev = function ((cur'::bef), cur, aft) -> Some (bef, cur', (cur::aft))
| _ -> None
...
Anton Moscal.
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next prev parent reply other threads:[~2002-08-15 9:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-13 8:00 Oleg
2002-08-13 8:54 ` Markus Mottl
2002-08-13 15:52 ` Oleg
2002-08-13 11:00 ` Diego Olivier Fernandez Pons
2002-08-13 14:30 ` Oleg
2002-08-13 15:11 ` Anton Moscal [this message]
2002-08-13 16:12 ` Oleg
2002-08-13 17:16 ` Max Kirillov
2002-08-14 0:49 ` Max Kirillov
2002-08-13 18:23 ` Anton E. Moscal
2002-08-13 16:16 ` Brian Rogoff
2002-08-14 8:13 ` Diego Olivier Fernandez Pons
2002-08-14 15:43 ` Brian Rogoff
2002-08-19 10:38 ` Diego Olivier Fernandez Pons
2002-08-19 15:58 ` Polymorphic recursion 9Was Re: [Caml-list] Doubly-linked list) Brian Rogoff
2002-08-21 8:04 ` Diego Olivier Fernandez Pons
2002-08-21 15:48 ` Brian Rogoff
2002-08-23 8:14 ` Diego Olivier Fernandez Pons
2002-08-23 21:57 ` John Max Skaller
2002-08-27 13:00 ` Diego Olivier Fernandez Pons
2002-08-28 14:50 ` John Max Skaller
2002-08-28 17:27 ` [Caml-list] FELIX (was: Polymorphic recursion) Oleg
2002-08-19 23:17 ` [Caml-list] Doubly-linked list james woodyatt
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