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From: Mike Hamburg <hamburg@fas.harvard.edu>
To: Alex Baretta <alex@barettadeit.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] 'a Set?
Date: Wed, 26 Jan 2005 16:09:24 -0500	[thread overview]
Message-ID: <8E480565-6FDE-11D9-8411-0003939A19AA@fas.harvard.edu> (raw)
In-Reply-To: <41F7BE8F.5090101@barettadeit.com>

I call this operator <?>, because I often use it like so:

List.map (List.nth <?> 3) myList;;

Sadly, at toplevel <?> makes you lots of pretty '_a that restrict your 
future actions.  See my next post for questions about '_a.

Mike

On Jan 26, 2005, at 11:00 AM, Alex Baretta wrote:

> Jacques Garrigue wrote:
>> From: Radu Grigore <radugrigore@gmail.com>
>
>> If you respect this convention, the type tells you about the semantics
>> :-)
>
> There are two different patterns for function signatures: the Hashtbl 
> pattern and the Map pattern. Both are "good", depending on the 
> context. Since I need both approaches I have come up with a little 
> trick to get the best of both worlds.
>
> # let (~%) f = fun x y -> f y x
>
> The ~% operator swaps the first and the second parameter in a function 
> call. The following is a trivial example of its use.
>
> # ~% Printf.kprintf "Hello %s!" failwith "World";;
> Exception: Failure "Hello World!".
>
> Alex
>
> -- 
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  parent reply	other threads:[~2005-01-26 21:09 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-25 23:54 Mike Hamburg
2005-01-26  8:25 ` [Caml-list] " Jean-Christophe Filliatre
2005-01-26 10:13   ` Frédéric Gava
2005-01-26 11:04     ` Radu Grigore
2005-01-26 12:04       ` Jacques Garrigue
2005-01-26 16:00         ` Alex Baretta
2005-01-26 16:14           ` Jacques Carette
2005-01-26 21:09           ` Mike Hamburg [this message]
2005-01-29  9:55         ` Radu Grigore
2005-01-26  9:13 ` Jon Harrop
2005-01-26 15:36   ` Frédéric Gava
2005-01-26 16:06     ` Jon Harrop

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