[Caml-list] hash objectified

[Caml-list] hash objectified

[KONTRA Gergely]

Hi!

If my memory serves me well, there is a classified version of hashes,
and other modules. But I cannot find them. Can anyone tell me the URL?

thx, Gergo
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Re: [Caml-list] hash objectified

[Xavier Leroy]

> If my memory serves me well, there is a classified version of hashes,
> and other modules. But I cannot find them. Can anyone tell me the URL?

I'm not sure I understand your question correctly, but maybe you're
looking for the Cryptokit library:
        http://pauillac.inria.fr/~xleroy/software.html

- Xavier Leroy

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Re: [Caml-list] hash objectified

[William Lovas]

On Mon, Aug 18, 2003 at 02:50:56PM +0200, Xavier Leroy wrote:
> > If my memory serves me well, there is a classified version of hashes,
> > and other modules. But I cannot find them. Can anyone tell me the URL?
> 
> I'm not sure I understand your question correctly, but maybe you're
> looking for the Cryptokit library:
>         http://pauillac.inria.fr/~xleroy/software.html

Hmm.  My guess is he was looking for Jacques Garrigue's O'Caml class
library, which a moment on Google found for me:

    http://wwwfun.kurims.kyoto-u.ac.jp/soft/olabl/classes/

`Classified' as in `made into a class', not `withheld from circulation' :)

cheers,
William

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Re: [Caml-list] hash objectified

[Xavier Leroy]

> > > If my memory serves me well, there is a classified version of hashes,
> > > and other modules. But I cannot find them. Can anyone tell me the URL?
> 
> `Classified' as in `made into a class', not `withheld from circulation' :)

Agreed, but with 'hashes' as in 'cryptographic hash functions', we get
'cryptographic hash functions made into a class', and that fits Cryptokit :-)

- Xavier "code-breaker" Leroy

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Re: [Caml-list] hash objectified

[William Lovas]

On Mon, Aug 18, 2003 at 05:09:06PM +0200, Xavier Leroy wrote:
> > > > If my memory serves me well, there is a classified version of hashes,
> > > > and other modules. But I cannot find them. Can anyone tell me the URL?
> > 
> > `Classified' as in `made into a class', not `withheld from circulation' :)
> 
> Agreed, but with 'hashes' as in 'cryptographic hash functions', we get
> 'cryptographic hash functions made into a class', and that fits Cryptokit :-)

Fair enough :)  I didn't know Cryptokit was `classified' in that sense.

> - Xavier "code-breaker" Leroy

*grin*

William

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Re: [Caml-list] hash objectified

[KONTRA Gergely]

On 0818, William Lovas wrote:
> Hmm.  My guess is he was looking for Jacques Garrigue's O'Caml class
> library, which a moment on Google found for me:
> 
>     http://wwwfun.kurims.kyoto-u.ac.jp/soft/olabl/classes/

Yes, you're right, thank you. Will ocaml have this in the standard
library?
Or even better: is that possible to automagically convert eg.
(h=Hashtbl.new 32;;)
h#push "key" "value";;

to
Hashtbl.push h "key" "value";;

If caml is objective, it has to support object-oriented programming...


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Re: [Caml-list] hash objectified

[William Lovas]

On Thu, Aug 21, 2003 at 12:24:58PM +0200, KONTRA Gergely wrote:
> Yes, you're right, thank you. Will ocaml have this in the standard
> library?
>
> [...]
>
> If caml is objective, it has to support object-oriented programming...

Well, O'Caml supports the use of objects and classes in those instances
where subtyping or multiple implementations are necessary.  For O'Caml to
"support object-oriented programming", it is not necessary that every data
structure and module also be encapsulated in some class.

There's no need for everything to be an object, and i don't really see
what that would buy you in the long run, since O'Caml doesn't have any
"top" or "top-like" type, like Java's Object.  Why do you want the standard
library's functionality replicated in object form?

William

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Re: [Caml-list] hash objectified

[KONTRA Gergely]

On 0821, William Lovas wrote:
[...]
> There's no need for everything to be an object, and i don't really see
> what that would buy you in the long run, since O'Caml doesn't have any
> "top" or "top-like" type, like Java's Object.  Why do you want the standard
> library's functionality replicated in object form?
> 
> William

Hashtbl.add h "foo" "bar" <--> h#add "foo" "bar"

Because it is shorter to type -> less errors, quicker programming
OO can be cool. (see ruby)
I'm not OO fan, but lazy :)

Gergo
-- 
+-[ Kontra, Gergely<kgergely@mcl.hu> PhD student Room IB113 ]---------+
| http://www.mcl.hu/~kgergely            "Olyan langesz vagyok, hogy  |
| Mobil:(+36 20) 356 9656 ICQ: 175564914   poroltoval kellene jarnom" |
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----- End forwarded message -----

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+-[ Kontra, Gergely<kgergely@mcl.hu> PhD student Room IB113 ]---------+
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Re: [Caml-list] hash objectified

[Manos Renieris]

On Mon, Aug 25, 2003 at 05:46:39PM +0200, KONTRA Gergely wrote:
> 
> Hashtbl.add h "foo" "bar" <--> h#add "foo" "bar"
> 
> Because it is shorter to type -> less errors, quicker programming
> OO can be cool. (see ruby)
> I'm not OO fan, but lazy :)

If that's the reason, once you do
    module H = Hashtbl
then
    H.add h "foo" "bar"
is only two characters longer, and one shift shorter :-)
And the compiler ensures the exact type of h, and you know statically
what function you call -> less to keep in your head -> less errors,
quicker programming.

-- Manos

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Re: [Caml-list] hash objectified

[henridf]

> > Hashtbl.add h "foo" "bar" <--> h#add "foo" "bar"
> > 
> > Because it is shorter to type -> less errors, quicker programming
> > OO can be cool. (see ruby)
> > I'm not OO fan, but lazy :)
> 
> If that's the reason, once you do
>     module H = Hashtbl
> then
>     H.add h "foo" "bar"
> is only two characters longer, and one shift shorter :-)
> And the compiler ensures the exact type of h, and you know statically
> what function you call -> less to keep in your head -> less errors,
> quicker programming.
> 
and quicker at runtime too i would assume.


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Re: [Caml-list] hash objectified

[Yaron M. Minsky]

My take on the same problem was to define infix notation for a few
oft-used operations, including some hash table operations.  To that end
I defined

   h |> k

to lookup key k in hashtable h, and 

   h |< (k,d)

to add the key,data pair (k,d) to h.  It has the downside of obscurity
to the uninitiated, but I find it a lot easier to read code that uses
these operators than the rather overlong Hashtbl.* equivalents.

y

On Mon, 2003-08-25 at 13:32, Manos Renieris wrote:
> On Mon, Aug 25, 2003 at 05:46:39PM +0200, KONTRA Gergely wrote:
> > 
> > Hashtbl.add h "foo" "bar" <--> h#add "foo" "bar"
> > 
> > Because it is shorter to type -> less errors, quicker programming
> > OO can be cool. (see ruby)
> > I'm not OO fan, but lazy :)
> 
> If that's the reason, once you do
>     module H = Hashtbl
> then
>     H.add h "foo" "bar"
> is only two characters longer, and one shift shorter :-)
> And the compiler ensures the exact type of h, and you know statically
> what function you call -> less to keep in your head -> less errors,
> quicker programming.
> 
> -- Manos
> 
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