From: Thomas Fischbacher <tf@functionality.de>
To: Jon Harrop <jon@ffconsultancy.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] The Implicit Accumulator: a design pattern using optional arguments
Date: Wed, 27 Jun 2007 15:18:54 +0100 [thread overview]
Message-ID: <468271CE.7040406@functionality.de> (raw)
In-Reply-To: <200706271453.06045.jon@ffconsultancy.com>
Jon Harrop wrote:
> Basically, you memoize strings:
>
> # let symbol =
> let m = Hashtbl.create 1 in
> fun string ->
> try Hashtbl.find m string with Not_found ->
> Hashtbl.add m string string;
> string;;
> val symbol : '_a -> '_a = <fun>
...which is, of course, just a consequence of the OCaml drawback that
there is no proper "symbol" data type (which actually would be useful,
in particular in conjunction with proper EQ hash tables)...
By the way, the Perl interpreter does the same thing with
script-constant strings, also using this to provide
"effective almost-symbols".
--
best regards,
Thomas Fischbacher
tf@functionality.de
next prev parent reply other threads:[~2007-06-27 14:18 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-27 12:14 Jon Harrop
2007-06-27 13:18 ` [Caml-list] " Quôc Peyrot
2007-06-27 13:53 ` Jon Harrop
2007-06-27 14:18 ` Thomas Fischbacher [this message]
2007-06-27 15:09 ` Quôc Peyrot
2007-06-27 15:28 ` Mattias Engdegård
2007-06-27 15:38 ` Robert Fischer
2007-06-27 15:48 ` Mattias Engdegård
2007-06-27 16:01 ` Robert Fischer
2007-06-27 16:01 ` Mattias Engdegård
2007-06-27 18:06 ` Jon Harrop
2007-06-27 18:31 ` Brian Hurt
2007-06-27 19:56 ` skaller
2007-06-27 20:17 ` Jonathan Bryant
2007-06-27 22:57 ` Jon Harrop
2007-06-27 16:53 ` Hash-consing (was Re: [Caml-list] The Implicit Accumulator: a design pattern using optional arguments) Daniel Bünzli
2007-06-30 8:19 ` [Caml-list] The Implicit Accumulator: a design pattern using optional arguments Pierre Etchemaïté
2007-06-27 13:55 ` Thomas Fischbacher
2007-06-27 15:06 ` Quôc Peyrot
2007-06-27 15:53 ` Jon Harrop
2007-06-28 11:01 ` Thomas Fischbacher
2007-06-28 11:32 ` Jon Harrop
2007-06-28 11:42 ` Joel Reymont
2007-06-28 12:08 ` Jon Harrop
2007-06-28 13:10 ` Quôc Peyrot
2007-06-28 13:35 ` Thomas Fischbacher
2007-06-28 12:59 ` Thomas Fischbacher
2007-06-28 13:05 ` Jon Harrop
2007-06-28 13:33 ` Thomas Fischbacher
2007-06-28 14:43 ` Jon Harrop
2007-06-28 16:01 ` Thomas Fischbacher
2007-06-28 17:53 ` Jon Harrop
2007-06-27 16:39 ` Thomas Fischbacher
2007-06-27 19:26 ` Quôc Peyrot
2007-06-28 11:39 ` Thomas Fischbacher
2007-06-28 14:44 ` Jon Harrop
2007-06-28 16:03 ` Thomas Fischbacher
2007-06-28 17:20 ` Dirk Thierbach
2007-06-28 22:12 ` Thomas Fischbacher
2007-06-29 1:10 ` Jon Harrop
2007-06-29 10:55 ` Thomas Fischbacher
2007-06-29 6:12 ` Dirk Thierbach
2007-06-27 17:16 ` Book about functional design patterns Gabriel Kerneis
2007-06-27 17:48 ` [Caml-list] " Jon Harrop
2007-06-27 19:33 ` Quôc Peyrot
2007-06-27 19:30 ` Quôc Peyrot
2007-06-27 19:48 ` Brian Hurt
2007-06-27 20:04 ` Quôc Peyrot
2007-06-27 20:35 ` Brian Hurt
2007-06-27 20:55 ` Quôc Peyrot
2007-06-27 20:58 ` Pal-Kristian Engstad
2007-06-27 21:18 ` Quôc Peyrot
2007-06-27 21:18 ` Pal-Kristian Engstad
2007-06-27 21:34 ` Quôc Peyrot
2007-06-27 22:13 ` Pal-Kristian Engstad
2007-06-27 15:18 ` [Caml-list] The Implicit Accumulator: a design pattern using optional arguments Jon Harrop
2007-06-27 16:44 ` Thomas Fischbacher
2007-06-27 18:17 ` Jon Harrop
2007-06-28 11:18 ` Thomas Fischbacher
2007-06-29 13:15 ` Bill Wood
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