ocaml-lib-devel — Developer's mailing list

Re: [Ocaml-lib-devel] Batteries Included

[David T. <Dav...@un...>]

Ok. What about meeting on IRC one of these days and discussing all
that ? 

Cheers,
 David

P.S.:
 For those who don't know, I'm Yoric[DT] on #ocaml on freenode.

On Fri, 2008-05-02 at 09:54 +0100, Richard Jones wrote:
> On Thu, May 01, 2008 at 01:11:19PM -0700, Janne Hellsten wrote:
> > At the very least, it would be good if you had a discussion about your
> > changes and goals of your project if you plan on making changes to ExtLib.
> 
> Agreed ... Discussing the changes you want to make ahead of time will
> reduce surprises.  Also submitting small patches (rather than one huge
> patch at the end) will allow changes to be reviewed more carefully.
> 
> Rich.
> 
-- 
David Teller
 Security of Distributed Systems
  http://www.univ-orleans.fr/lifo/Members/David.Teller
 Angry researcher: French Universities need reforms, but the LRU act brings liquidations. 

Re: [Ocaml-lib-devel] Batteries Included

[Richard J. <ri...@an...>]

On Thu, May 01, 2008 at 01:11:19PM -0700, Janne Hellsten wrote:
> At the very least, it would be good if you had a discussion about your
> changes and goals of your project if you plan on making changes to ExtLib.

Agreed ... Discussing the changes you want to make ahead of time will
reduce surprises.  Also submitting small patches (rather than one huge
patch at the end) will allow changes to be reviewed more carefully.

Rich.

-- 
Richard Jones
Red Hat

Re: [Ocaml-lib-devel] Batteries Included

[Janne H. <jjh...@gm...>]

[Adding ocaml-lib-devel]

Hi David,

How many changes are you going to make and how big are they going to be?
When I offered to help Nicolas maintain ExtLib, he said he'd want to err on
rather conservative side as far as changes to ExtLib go.

Are you sure you want to make your changes directly into ExtLib or couldn't
you ship ExtLib as a separate library and provide your changes as additional
modules that would work well with ExtLib?  ExtLib is already integrated into
several distros (GODI, Debian, Red Hat, etc.) and has a pretty big number of
users.  IMO having a single "main branch" for ExtLib would make it clear for
ExtLib users what is the standard version and what are the "ExtLib extension
libraries".

At the very least, it would be good if you had a discussion about your
changes and goals of your project if you plan on making changes to ExtLib.

Janne

On Thu, Apr 24, 2008 at 3:01 AM, David Teller <Dav...@un...>
wrote:

> My apologies for being unclear and/or rushing ahead too much. What I
> should have written is that Batteries Included will start by being only
> ExtLib. I (and whoever else decides to go along with Batteries) will
> accept suggestions and requests for features, try to find existing
> libraries with appropriate licenses and/or to implement them. Any
> implementation falling in the field of ExtLib will be submitted back to
> ExtLib, of course.
>
> I assume there will be a few differences between ExtLib-in-Batteries and
> original ExtLib, but I expect they will be marginal and won't come in
> the way (right now, the only thing I can think of is extlib.ml, which
> may have to be replaced by something a bit bigger).
>
> Is this less confusing and less scary ?
>
> Cheers,
>  David
>
>
> On Tue, 2008-04-22 at 12:25 -0700, Janne Hellsten wrote:
> > Hi David,
> >
> > Being one of the maintainers of ExtLib, your below comment confused
> > me.
> >
> > What exactly is your intent?  Are you planning on forking ExtLib?  How
> > is this going to help the OCaml community if we create more
> > fragmentation (as opposed to less fragmentation)?
> >
> > Cheers,
> >
> > Janne
>
> --
> David Teller
>  Security of Distributed Systems
>  http://www.univ-orleans.fr/lifo/Members/David.Teller
>  Angry researcher: French Universities need reforms, but the LRU act
> brings liquidations.
>
>

[Ocaml-lib-devel] Male supplements direct from America

[krainak <Nik...@2d...>]

To be or not to be a man, the answer is really just a click away. http://www.poweienati.com/

[Ocaml-lib-devel] Love me longer love me harder

[Dailey <dio...@BP...>]

Buy more for much less with new herbal schemes http://www.hammenai.com/

[Ocaml-lib-devel] Give her mindblowing fun right now

[Mersereau <luc...@De...>]

Lovemaking is not a skill, all you need is to be huge http://www.ogienaig.com/

[Ocaml-lib-devel] More bang for the buck

[Lakeesha <mi...@FR...>]

Don't lose out, everyone is on the road to getting great herbal products http://www.byeueahi.com/

[Ocaml-lib-devel] Last minute discounts on express herbals

[Derringer <Hen...@LA...>]

Be as large as you want with new improved herbal formulas http://www.tineiag.com/

Re: [Ocaml-lib-devel] Proposed higher-order function: List.find_map

[Janne H. <jjh...@gm...>]

That was quick, thanks!

Janne

On Wed, Apr 23, 2008 at 11:09 AM, Richard Jones <ri...@an...> wrote:
> On Wed, Apr 23, 2008 at 10:50:17AM -0700, Janne Hellsten wrote:
>  > Hi Rich,
>  >
>  > Would you also be so kind as to add a simple unit test for your new
>  > function?  Although your addition is fairly straightforward, it's good
>  > to test it in order to protect it in the future if someone wishes to
>  > change it.
>
>  Done (rev 381).
>
>
>
>  Rich.
>
>  --
>  Richard Jones
>  Red Hat
>

Re: [Ocaml-lib-devel] Proposed higher-order function: List.find_map

[Richard J. <ri...@an...>]

On Wed, Apr 23, 2008 at 10:50:17AM -0700, Janne Hellsten wrote:
> Hi Rich,
> 
> Would you also be so kind as to add a simple unit test for your new
> function?  Although your addition is fairly straightforward, it's good
> to test it in order to protect it in the future if someone wishes to
> change it.

Done (rev 381).

Rich.

-- 
Richard Jones
Red Hat

Re: [Ocaml-lib-devel] Proposed higher-order function: List.find_map

[Janne H. <jjh...@gm...>]

Hi Rich,

Would you also be so kind as to add a simple unit test for your new
function?  Although your addition is fairly straightforward, it's good
to test it in order to protect it in the future if someone wishes to
change it.

Janne

On Wed, Apr 23, 2008 at 5:05 AM, Richard Jones <ri...@an...> wrote:
> On Tue, Apr 22, 2008 at 12:18:15PM -0700, Janne Hellsten wrote:
>  > Looks good, I would find this useful.
>
>  OK, I've committed find_map:
>  http://code.google.com/p/ocaml-extlib/source/detail?r=380
>
>  Rich.
>
>  --
>  Richard Jones
>  Red Hat
>

Re: [Ocaml-lib-devel] small patch to extlib: read/write float32

[Janne H. <jjh...@gm...>]

Hi Philippe,

Sorry for taking so long to do this, life has been busy lately.

I added your patch under our issue DB so that it gets tracked
properly.  See my notes here:

http://code.google.com/p/ocaml-extlib/issues/detail?id=6

I added a couple of notes in the bug item.  The important part is that
I'd name these functions read/write_float32 instead of *_float.  See
the bug for more details.

Furthermore, I'd appreciate if you could also send a patch that adds a
unit test that tests your new functions.  Since your new functions are
rather simple, I'd go for something very simple like writing "1.0" as
an a 32-bit int (0x3F800000) into a string IO channel and reading it
back with your new functions and comparing the result against 1.0.

The unit tests are in "ocaml-extlib/trunk/test".  To run them, do:

cd ocaml-extlib/trunk/test
make
make run
make opt
make run

Adding a new test case is rather straightforward.  I'd add a wiki page
to explain how to add them, but at the moment code.google.com's wiki
is down for maintenance and I add new pages.

Janne

On Sun, Apr 6, 2008 at 2:09 PM, Philippe Strauss <ph...@ph...> wrote:
>
>
>
>
> Hello,
>
> I wanted to read some data written "raw" in float32 format by a python program, and noticed than extlib didn't have (at least at v 1.5) functions to write or read float32, double precision float are supported.
>
> Here's a small patch, feel free to use it.
>
> Regards.
>
>
> --
> Philippe Strauss
> ph...@ph...
>
>
>
>
>

Re: [Ocaml-lib-devel] Proposed higher-order function: List.find_map

[Richard J. <ri...@an...>]

On Tue, Apr 22, 2008 at 12:18:15PM -0700, Janne Hellsten wrote:
> Looks good, I would find this useful.

OK, I've committed find_map:
http://code.google.com/p/ocaml-extlib/source/detail?r=380

Rich.

-- 
Richard Jones
Red Hat

Re: [Ocaml-lib-devel] Proposed higher-order function: List.find_map

[Janne H. <jjh...@gm...>]

Looks good, I would find this useful.

Janne

On Tue, Apr 22, 2008 at 3:45 AM, Richard Jones <ri...@an...> wrote:

> I'd like to propose the following function for inclusion in ExtList:
>
>  (**
>       [find_map pred list] finds the first element of [list] for which
>       [pred element] returns [Some r].  It returns [r] immediately
>       once found.
>
>       @raise Not_found if no element matches the predicate.
>
>       See also {!filter_map}.
>    *)
>
>  val find_map : ('a -> 'b option) -> 'a list -> 'b
>
>  let rec find_map f = function
>    | [] -> raise Not_found
>    | x :: xs ->
>        match f x with
>        | Some y -> y
>        | None -> find_map f xs
>
> The HOF is analogous to filter_map, but only returns the first element
> found, rather than all matching elements.
>
> I find this HOF useful when iterating over XML [1].  For example if
> you have XML like this:
>
>  <guest>
>    <os_type>hvm</os_type>
>    <arch name='ppc'/>
>  </guest>
>
> and you want to find the <os_type> content, then assuming 'guest' is a
> variable containing the child nodes of <guest>:
>
>  let os_type =
>    try
>      find_map (
>          function
>          | Element ("os_type", _, [PCData "hvm"]) -> Some VT_HVM
>          | Element ("os_type", _, [PCData "xen"]) -> Some VT_Xen
>          | _ -> None
>      ) guest
>    with
>      Not_found -> VT_Unknown in
>
> If nobody objects I would like to add this to extlib.
>
> Rich.
>
> [1] I know it'd be better to do this with CDuce, but that would
> require there to be some sort of schema to the XML which doesn't
> change with the phase of the moon.
>
> --
> Richard Jones
> Red Hat
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
> Don't miss this year's exciting event. There's still time to save $100.
> Use priority code J8TL2D2.
>
> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
> _______________________________________________
> ocaml-lib-devel mailing list
> oca...@li...
> https://lists.sourceforge.net/lists/listinfo/ocaml-lib-devel
>

[Ocaml-lib-devel] Proposed higher-order function: List.find_map

[Richard J. <ri...@an...>]

I'd like to propose the following function for inclusion in ExtList:

  (**
       [find_map pred list] finds the first element of [list] for which
       [pred element] returns [Some r].  It returns [r] immediately
       once found.

       @raise Not_found if no element matches the predicate.

       See also {!filter_map}.
    *)

  val find_map : ('a -> 'b option) -> 'a list -> 'b
  
  let rec find_map f = function
    | [] -> raise Not_found
    | x :: xs ->
        match f x with
        | Some y -> y
        | None -> find_map f xs

The HOF is analogous to filter_map, but only returns the first element
found, rather than all matching elements.

I find this HOF useful when iterating over XML [1].  For example if
you have XML like this:

  <guest>
    <os_type>hvm</os_type>
    <arch name='ppc'/>
  </guest>

and you want to find the <os_type> content, then assuming 'guest' is a
variable containing the child nodes of <guest>:

  let os_type =
    try
      find_map (
	  function
	  | Element ("os_type", _, [PCData "hvm"]) -> Some VT_HVM
	  | Element ("os_type", _, [PCData "xen"]) -> Some VT_Xen
	  | _ -> None
      ) guest
    with
      Not_found -> VT_Unknown in

If nobody objects I would like to add this to extlib.

Rich.

[1] I know it'd be better to do this with CDuce, but that would
require there to be some sort of schema to the XML which doesn't
change with the phase of the moon.

-- 
Richard Jones
Red Hat

[Ocaml-lib-devel] Pokehermore Gotta shag them all

[Kockaric <ash...@AL...>]

You can have the most indecent bulge popping out from your pants, that you will be banned wearing thongs. http://www.miuenag.com/

[Ocaml-lib-devel] Final penetration

[Gorney <sno...@BA...>]

Increase your chances of getting that pretty lady by enlarging your instrument today. http://www.laxerer.com/

[Ocaml-lib-devel] Intensify and double her pleasure

[Pat <Pat...@CS...>]

Your giant gun will explode inside her http://www.mienagie.com/

[Ocaml-lib-devel] Pureria tuberosa (Fabaceae) 20 mg

[Al B. <das...@la...>]

We look forward to your success!
http://poegejai.com

[Ocaml-lib-devel] Choose from any two great diet plans

[murrayTodero <net...@4e...>]

Chicks dig it, so don't wait any longer, get your new size today http://www.niebagine.com/

[Ocaml-lib-devel] wet and in a bikini

[muhammad <Mel...@Tr...>]

Upgrade your hardware by getting our supplements http://www.polieantof.com/

[Ocaml-lib-devel] Leading the enhancement revolution

[Thuong <Thu...@MI...>]

Be the man you've always wanted to be with this. http://www.pogeinte.com/

[Ocaml-lib-devel] Mucuna pruriens (Cowhage) 100 mg

[Billie D. <so...@wa...>]

It is an effective, top-quality and well-tolerated remedy.
http://razasude.com

[Ocaml-lib-devel] InfoPath 2007

[Crystal M. <sen...@mi...>]

Microsoft Office Enterprise 2007 includes:
• Access 2007
• Communicator 2007
• Excel 2007
• Groove 2007
• InfoPath 2007
• OneNote 2007
• Outlook 2007
• PowerPoint 2007
• Publisher 2007
• Word 2007

http://jocelyncorrelldk268.blogspot.com

System Requirements

• Intel® Pentium® or AMD® 500 MHz processor
• Microsoft Windows® XP Professional or Home Edition with Service Pack 2, Windows Server® 2003 with SP1, Microsoft Windows Vista.
• 256 Mb of RAM
• 2GB of available hard-disk space.
• 1024x768 or higher resolution monitor
• Some features require Microsoft Windows Desktop Search 3.0, Microsoft Windows Media Player 9.0, Microsoft DirectX 9.0b, Microsoft Active Sync 4.1

[Ocaml-lib-devel] Word 2007

[Marlene S. <el...@ja...>]

Microsoft Office Enterprise 2007 includes:
• Access 2007
• Communicator 2007
• Excel 2007
• Groove 2007
• InfoPath 2007
• OneNote 2007
• Outlook 2007
• PowerPoint 2007
• Publisher 2007
• Word 2007

http://sophiasobelmq633.blogspot.com

System Requirements

• Intel® Pentium® or AMD® 500 MHz processor
• Microsoft Windows® XP Professional or Home Edition with Service Pack 2, Windows Server® 2003 with SP1, Microsoft Windows Vista.
• 256 Mb of RAM
• 2GB of available hard-disk space.
• 1024x768 or higher resolution monitor
• Some features require Microsoft Windows Desktop Search 3.0, Microsoft Windows Media Player 9.0, Microsoft DirectX 9.0b, Microsoft Active Sync 4.1