From: Juan Jose Garcia Ripoll <jjgarcia@ind-cr.uclm.es>
To: Caml list <caml-list@pauillac.inria.fr>
Subject: Map is not tail recursive
Date: Sun, 10 Jan 1999 11:49:53 +0100 [thread overview]
Message-ID: <369885D1.1C8A1269@ind-cr.uclm.es> (raw)
Hi,
I've had a look at the List package and it seems that it is not properly
tail recursive. Even more, for medium to large lists it exhausts the
stack. I would suggest either recoding it as
let map f a =
let domap f done todo =
match todo with
[] -> List.reverse done
| (x::xs) -> domap (f x)::done xs
in domap f [] a
Another possibility would be to introduce destructive operations such as
Scheme's setcdr! and setcar!. This would eliminate the need of using
List.reverse, at the cost of introducing some imperative style.
Please excuse any mistake -- I'm quite new to this language.
Regards
Juanjo
next reply other threads:[~1999-01-11 9:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-01-10 10:49 Juan Jose Garcia Ripoll [this message]
1999-01-11 11:03 ` Xavier Leroy
1999-01-12 11:49 ` William Chesters
1999-01-11 18:51 David McClain
1999-01-13 8:47 ` Jacques GARRIGUE
1999-01-12 12:06 Marc Rouaix
1999-01-13 17:40 Marc Rouaix
1999-01-14 3:49 David McClain
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