01:24 <Carillon> hey guys, ocaml newbie here...has anyone here tried making a Qt wrapper for ocaml? i'm not sure how the slots stuff would translate, but would be appreciate any expert thoughts.

09:34 <kwikwi> lo all

09:35 <kwikwi> does anybody here know how to force the encoding when writing a text file on the disk (using Pervasives) ?

09:36 <kwikwi> e.g. my application writes an XML file, and I want it to be encoded in UTF-8

09:36 <kwikwi> at the moment it's in my locale (ISO-8859-1), which I don't want it to be as the locale is... you know... locale (and the program must run on other platforms)

09:37 <|Lupin|> kwikwi: What areyou usingto produce XML ? Ar you using an existing library ?

09:37 <kwikwi> I'm using XML-Light, which only produces a string

09:38 <kwikwi> I assume ocaml doesn't encode its string internally in the locale encoding

09:38 <|Lupin|> kwikwi: If I were you I'd have a look to Cduce and Camduce. You'd probably feel much more comfortable with these tools t produceyou XML.

09:39 <kwikwi> so the problem must be in the output part

09:40 <kwikwi> mmmm, sure... but it's one more requirement, whereas XML-Light is already needed for other parts of the greater application with which mine works

09:40 <kwikwi> I'll have a look at them nonetheless |Lupin| , thx

09:40 <|Lupin|> Ok. Ar yousure that there is no function provided by XML-Light to define which encoding one wants ?

09:44 <kwikwi> It's possible I missed something

09:45 <kwikwi> but the documentation is quite short and... I found nothing relative to encoding

09:46 <kowey> google mentions something about the netstring library

09:46 <kowey> i hear of a function "recode_string"

09:47 <kowey> http://ocamlnet.sourceforge.net/manual/refman/Netconversion.html

09:48 <kwikwi> mmm

09:48 <kwikwi> thx kowey

09:48 <kwikwi> i'll browse it later, gotta go

09:48 <kwikwi> +

10:12 <smimou> kwikwi: else you can use the camomile library to convert your string to utf8

11:22 <|Lupin|> bye Camlers

11:26 <kwikwi> smimou: i'll have a look at it, thx

12:29 <yondalf> anyone use vim? how do you turn off the automatic line wrapping when i code ocaml?

12:30 <zmdkrbou> :set tw=1000 or whatever value you want

12:30 <zmdkrbou> but using more than 80 columns is baaaad

12:32 <yondalf> thanks

15:30 <dylan> or :set notw...

15:35 <zmdkrbou> heh, didn't know that :)

16:42 <hcarty> Is there a shorthand syntax in OCaml for generating a list or array of values, like [ 1 .. 100 ] in Perl?

17:19 <Smerdyakov> hcarty, not that I know of in the main language... I'm sure someone has made a camlp4 extension for it.

17:29 <hcarty> Smerdyakov: Thanks, I'll look around

17:29 <Smerdyakov> Why not just write a function for it, though?

17:31 <hcarty> I can... force of habit mainly :-)

17:32 <hcarty> I've been using Perl for a long time, and the quick syntax is handy and readable for me. I've started learning OCaml for thesis/research related work - I'd like to avoid Fortran/C as much as possible.

17:33 <Smerdyakov> It's also often true that code that wants the notation you mention is poorly written.

17:34 <Smerdyakov> Instead, use a higher-order function that iterates over that range of values.

17:37 <hcarty> Ok, thanks for the tip. It's difficult finding and breaking some of these old habits.

19:00 <dylan> hcarty: haskell has the notation you mention, for the record. :)

19:06 <ookk> how do i get everything in a list in between head and last?

19:07 <ookk> i would like to match a list against head::middle::last

19:18 <hcarty> dylan: Haskell is tempting... but this will eventually be for fairly large-scale number crunching... some numerical simulation work, and a ton of satellite data analysis/manipulation. So the (supposed?) speed benefits of OCaml over Haskell have pushed me in this direction.

19:18 <hcarty> I'm still early in the process though, and Haskell definitely has a lot going for it. Not the least of which is pugs :-)

19:27 <dylan> it's not possible to do head :: middle :: last as pattern matching.

19:27 <dylan> you could write a function to do that, though

19:28 <ookk> yeah i suppose i could but i thought there was something built in :)

19:28 <ookk> dont want to invent the wheel ;)

19:29 <dylan> ocaml's standard library leaves a lot of wheels un-invented

19:30 <ookk> heh

19:46 <hcarty> Speaking of un-invented ... is there anything special that needs to be done to use the extlib modules from an interactive ocaml session? #load "extlib/extLib.cma";; doesn't work for me. A subsequent open Std;; tells me Std is an unbound module.

20:23 <ookk> i dont understand why head::last matches [1] for instance

20:25 <zmdkrbou> because [1] is 1::[]

20:26 <ookk> ok

20:26 <ookk> so if i want to match [1] i have to have a pattern like this _::[] ?

20:26 <zmdkrbou> or [_], yes

20:27 <ookk> but [_] and _::[] matches [1,2,3] also

20:27 <ookk> i just want it to match a list with one element

20:27 <zmdkrbou> _::[] doesn't match [1;2;3]

20:28 <zmdkrbou> in x :: y, x is an element of type 'a and y is of type 'a list

20:28 <ookk> oh i see

21:35 <mnemonic> hi