From: John Max Skaller <skaller@ozemail.com.au>
To: William Lovas <wlovas@stwing.upenn.edu>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Memoizing (was: static variables...)
Date: Thu, 20 Jun 2002 00:42:53 +1000 [thread overview]
Message-ID: <3D10986D.2060801@ozemail.com.au> (raw)
In-Reply-To: <20020618084006.GA8596@force.stwing.upenn.edu>
William Lovas wrote:
>
> let recfib recfib = function
> | 0 | 1 -> 1
> | n -> recfib (n-1) + recfib (n-2);;
>
>
>Does anyone have any thoughts on this? Am i missing something obvious?
>
let fib = ref (function | _ -> 1);;
fib := function | 0 | 1 -> 1 | n-> !fib (n-1) + !fib (n-2) ;;
let memo h f x = (if not (Hashtbl.mem h x) then Hashtbl.add h x (f x);
Hashtbl.find h x);;
let h = Hashtbl.create 97;;
fib := memo h !fib;;
--
John Max Skaller, mailto:skaller@ozemail.com.au
snail:10/1 Toxteth Rd, Glebe, NSW 2037, Australia.
voice:61-2-9660-0850
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next prev parent reply other threads:[~2002-06-19 14:43 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-14 17:08 [Caml-list] static variables in a function Shannon --jj Behrens
2002-06-14 17:40 ` Stefano Zacchiroli
2002-06-14 17:58 ` Yutaka OIWA
2002-06-14 20:43 ` Shannon --jj Behrens
2002-06-15 4:42 ` Max Kirillov
2002-06-15 6:36 ` John Prevost
2002-06-15 14:51 ` Max Kirillov
2002-06-15 16:14 ` John Prevost
2002-06-15 19:19 ` Max Kirillov
2002-06-15 23:16 ` John Prevost
2002-06-16 23:19 ` Remi VANICAT
2002-06-17 13:56 ` [Caml-list] Memoizing (was: static variables...) Benedikt Rosenau
2002-06-18 8:40 ` William Lovas
2002-06-18 9:16 ` Jacek Chrzaszcz
2002-06-18 21:52 ` William Lovas
2002-06-18 13:07 ` Christopher Quinn
2002-06-18 14:07 ` Remi VANICAT
2002-06-18 17:52 ` Christopher Quinn
2002-06-19 14:42 ` John Max Skaller [this message]
2002-06-23 21:18 ` Pierre Weis
2002-06-19 4:38 ` [Caml-list] static variables in a function Shannon --jj Behrens
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