From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Haskell, anyone?
Date: Mon, 16 Nov 2015 09:33:27 +0100
Date: 2015-11-16T09:33:27+01:00 [thread overview]
Message-ID: <1vbqjk2gw3ml3$.1htxd6ry37jn1$.dlg@40tude.net> (raw)
In-Reply-To: dd1ada14-493d-44fc-a081-3a69515f2702@googlegroups.com
On Sun, 15 Nov 2015 14:11:07 -0800 (PST), mockturtle wrote:
> function add(X, Y: Integer) return Integer;
>
> rather than
>
> add :: Integer -> Integer -> Integer
>
> (Yes, I understand that this means that add is a function that maps an
> integer into a function that maps integers to integers... [confused? :-)]
Hmm, but that is not an equivalent of "add." In mathematical notation "add"
is:
add : Integer x Integer -> Integer
a mapping of pairs (Integer, Integer) to Integer.
[ However, in Ada's terms nothing requires it to be a mapping. E.g. "add"
may have side effects so that "add" with same arguments would return
different values. Which is no mapping then. There is still no pure
functions in Ada 2012, right? ]
> and I guess that this is taken from the common mathematical notation of
> functions) I guess one gets used to it, nevertheless, it is not the most
> intuitive syntax in the world... :-)
Seems so, except that doubled colon, which normally has the meaning
"deduced" rather than "equal."
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2015-11-16 8:33 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-15 20:42 Haskell, anyone? mockturtle
2015-11-15 20:51 ` Paul Rubin
2015-11-15 20:53 ` Nasser M. Abbasi
2015-11-15 21:50 ` Mark Carroll
2015-11-15 22:11 ` mockturtle
2015-11-15 22:48 ` Nasser M. Abbasi
2015-11-15 23:05 ` Mark Carroll
2015-11-16 4:11 ` Paul Rubin
2015-11-16 5:17 ` Nasser M. Abbasi
2015-11-16 5:48 ` Paul Rubin
2015-11-16 5:59 ` Nasser M. Abbasi
2015-11-16 6:47 ` Paul Rubin
2015-11-16 8:45 ` Simon Wright
2015-11-16 14:38 ` Brian Drummond
2015-11-15 23:19 ` Jeffrey R. Carter
2015-11-16 9:36 ` J-P. Rosen
2015-11-16 18:14 ` Jeffrey R. Carter
2015-11-16 3:59 ` Paul Rubin
2015-11-16 8:33 ` Dmitry A. Kazakov [this message]
2015-11-16 9:33 ` mockturtle
2015-11-16 9:45 ` Paul Rubin
2015-11-16 10:25 ` Hadrien Grasland
2015-11-16 11:19 ` Simon Wright
2015-11-16 11:25 ` Hadrien Grasland
2015-11-16 13:59 ` G.B.
2015-11-16 20:24 ` Jeffrey R. Carter
2015-11-16 23:23 ` Paul Rubin
2015-11-17 8:26 ` Dmitry A. Kazakov
2015-11-17 9:10 ` Mark Carroll
2015-11-17 20:09 ` Dmitry A. Kazakov
2015-11-17 10:49 ` Hadrien Grasland
2015-11-17 12:01 ` G.B.
2015-11-17 16:43 ` Hadrien Grasland
2015-11-17 18:04 ` Paul Rubin
2015-11-17 21:42 ` Hadrien Grasland
2015-11-18 4:36 ` Paul Rubin
2015-11-18 8:48 ` Hadrien Grasland
2015-11-18 9:23 ` Paul Rubin
2015-11-18 10:44 ` Hadrien Grasland
2015-11-18 11:02 ` Dmitry A. Kazakov
2015-11-18 12:41 ` G.B.
2015-11-18 23:06 ` Randy Brukardt
2015-11-19 8:56 ` Hadrien Grasland
2015-11-19 9:19 ` Hadrien Grasland
2015-11-19 21:27 ` Randy Brukardt
2015-11-24 12:03 ` Jacob Sparre Andersen
2015-11-19 7:22 ` Paul Rubin
2015-11-19 9:39 ` Hadrien Grasland
2015-11-17 13:01 ` Thomas Løcke
2015-11-17 16:45 ` Hadrien Grasland
2015-11-18 0:11 ` Paul Rubin
2015-11-18 9:44 ` Hadrien Grasland
2015-12-06 12:59 ` David Thompson
2015-12-07 7:25 ` Hadrien Grasland
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