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<gaze__>
what's the proper way to compose a string from a formatting?
<gaze__>
like, I'm looking for the function x where x "%s %s" "a" "b" == "a b"
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<thelema>
gaze__: Printf.sprintf
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<flux>
does jocaml need to exactly match my ocaml version? Warning: Version mismatch ocaml is 3.11.1+dev0 (2008-12-03), jocaml is 3.11.0
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<flux>
(although I do wonder why I have that, because I checked out release311 from cvs - apparently it's a branch, not a tag?)
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<flux>
(or maybe the versioning in godi's cvs ocaml doesn't have necessary special handling for real release tags)
<Yoric[DT]>
hi
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<flux>
hcarty, is there something that stops one from passing Marshal'd values with jocaml? with its closure support, obviously :)
<flux>
in the case one can know each node has the same executable running..
<Yoric[DT]>
Iirc, with old-style JoCaml, there was more to it than just Marshaling. There was also a degree of dynamic linking.
<Yoric[DT]>
(on unmarshal)
<flux>
hmm
<flux>
ah, right, first I read you were talking about plain OCaml
<flux>
and that would be very nice
<flux>
but while we don't have it, an alternative is nice to have :)
<flux>
if ocaml itself was ever to support marshalling into different versions of the same program, I would imagine Jocaml could just make use of that feature directly
<Yoric[DT]>
:)
* Yoric[DT]
wonders if development of Acute is still proceeding.
<flux>
atleast the latest white paper marked 'new' in the page is from Apr 2007..
<flux>
so perhaps
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<flux>
but it's been a while
<flux>
it seems jocaml is moving quite nicely, though
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<flux>
another issue with jocaml appears to be exceptions, but there's a decent workaround. perhaps the most important issue (before or after code mobility?) is the lack of type safety, even at runtime :/
<flux>
perhaps a 'lint' like solution could be deviced for the latter problem
<flux>
that's of course my opinion before actually trying it out :-)
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<buzz0r>
Hi! Someone ever used glade with ocaml (labltkg2) ? Im a ocaml newbie and dont know how to use the generated ocaml class by lablglade2cc to get something displayed.
<buzz0r>
The samples in the ubuntu package are (yet) too sophisticated
<buzz0r>
a simple hell world button would to
<buzz0r>
can someone help me?
<buzz0r>
would do.. sry.. misstyped :)
<flux>
I remember trying glade out quite some time ago and found it working, but that's about it.. and I can't find the stuff I played with.
<flux>
sorry :)
<buzz0r>
ok, so what do use now? Handcoded guis? or the ruby,tcl/tk,python or perl wrappers with its tools and extentiions?
<flux>
I would either pursue looking into glade, or hand-code
<flux>
what kind of gui project do you have in mind?
<flux>
unfortunately the gtk binding documentation will at times require looking at the original gtk documentation, unless you're well versed with it already
<buzz0r>
little window with a "ok" button in the middle. when pressing the button it should show a gtk windows with a label "hello world"
<buzz0r>
oh ok, thanks for the hint!
<buzz0r>
actually im playing with "rocaml" in comibation with "shoes" (the gui toolkit)
<flux>
how does that go?
<buzz0r>
it works
<buzz0r>
very smooth, so I guess using ruby/gtk with glade in combination with rocaml would do too
<buzz0r>
however, if you ever find your old files that used glade with ocaml, leav me a hint :)
<flux>
were the glade files called *.glade?
<buzz0r>
yes.
<buzz0r>
The step i am failing at, is when integration the generated ocaml glade-class
<buzz0r>
i know i have to inheritc this class
<buzz0r>
for the main application
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<buzz0r>
sry for my tipos
<flux>
did a new search armed with that piece of information: sorry, no go
<buzz0r>
class window1 ?domain ?autoconnect(*=true*) () =
<buzz0r>
let xmldata = Glade.create ~data ~root:"window1" ?domain () in
<buzz0r>
object (self)
<buzz0r>
inherit Glade.xml ?autoconnect xmldata
<buzz0r>
val toplevel =
<buzz0r>
new GWindow.window (GtkWindow.Window.cast
<buzz0r>
now i need to inherit the class (window1)
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<buzz0r>
into a "main" program and do stuff like "Gtk.main.main(run)" I think
<flux>
well, hang around on the channel, perhaps someone more familiar with glade&ocaml can give you a hand
<flux>
in the meanwhile perhaps trying to figure out the examples is useful :)
<buzz0r>
yep, I will keep on trying :). By the way.. is there a ocaml wiki ? If I figure it out, i'd like to contirubte it back. (and at least there would be place to find things again :) )
<flux>
there is ocaml-tutorial.org
<buzz0r>
ok thanks
<Kerris7>
I'm trying to do some Essentials of Programming Languages exercises in OCaml
<Kerris7>
as it is the program doesn't count occurrences of 's' if they exist in a list that is nested inside 'slist'
<flux>
let countoccurrances2 s slist = List.fold_left (fun n l -> n + countoccurrances s l) 0 slist
<flux>
you cannot write a single function that counts the number of occurrances in both 'a list and 'a list list, atleast without more accurately parametrizing what you're looking for
<Kerris7>
thanks flux :(
<flux>
(of course if you have a list that might have elements or sublists, you need to write a new type, such as: type 'a list_or_element = Element of 'a | List of 'a list_or_element list)
<Kerris7>
ah, the OCaml way
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<buzz0r>
ok, i made some progress. now i have a gtk button saying hello world when clicked. I did it with Glade and converteted it to ocaml code with lablglade2cc
<buzz0r>
however, back to basics :)
<buzz0r>
Whats the meaning of : object (self)
<buzz0r>
?
<flux>
what part of it in particular? (self) ?
<buzz0r>
class editor () =
<buzz0r>
object (self)
<buzz0r>
inherit window1 ()
<flux>
plain 'object' is just part of the syntax that defines an object, in this for a class
<flux>
if you have (self), self is the 'this' value of the object
<flux>
so if it ever needs to refer to itself, it can use that to do that
<buzz0r>
ok, if I would have the method "foobar" i could call it like:
<buzz0r>
self.foobar ?
<xevz>
self#foobar
<buzz0r>
thanks! So this implies i can only have one "self" object in a program?
<flux>
well, one 'self' per object
<flux>
self is accessible only from within the object
<buzz0r>
ah ok
<buzz0r>
that make sense
<buzz0r>
makes.. damn tipos :)
<buzz0r>
thanks again
<xevz>
Would you want to access the foobar method in the "editor" class it would be "let editor_object = new editor in editor_object#foobar"...
<buzz0r>
thanks xevz! thats a nice hint. so now can further go ahead step by step
<buzz0r>
so this is me after 6 hours of playing with ocaml... feels good so far. But another thjing that i am curious about: Has anyone of you tried the ocaml java bindings? (since i would ike to use them in the future ~2-3 Weeks. with itext)
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<xevz>
Do you want to call Java from O'Caml or O'Caml from Java?
<buzz0r>
Java from ocaml
<Smerdyakov>
It's "OCaml," not "O'Caml."
<xevz>
Smerdyakov: Sorry.
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<vixey>
I thought it was Ocaml
<Smerdyakov>
Nope, that's wrong, too.
<xevz>
Objective Caml... :)
<Smerdyakov>
See the FAQ.
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<buzz0r>
what do I need an initilizer for? ..
<thelema>
to call methods of an object at creation time.
<buzz0r>
thx!
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<buzz0r>
Do you know: when do i need to write "let _ = main ()"
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<Smerdyakov>
buzz0r, I don't understand the question.
<hcarty>
Glad to help. The library reference is a good thing to keep close by.
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<s4tan>
yup : )
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<Anarchos>
i encounter so much trouble understanding the caml_local_roots variable :/
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<hcarty>
Anarchos: You would probably have better luck on the mailing list
<Anarchos>
hcarty ok. i try to interface with a C++ multithreaded api, protecting the callbacks with a semaphore, but i have random segault in caml_oldify_local_roots
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<Anarchos>
hcarty i still think a concurrent GC would not improve the speed, but should improve the ability to link with multithread C++ api :)
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<palomer>
speaking of C++
<palomer>
how's ocaml qt coming along?
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<hcarty>
palomer: The official archive does not seem to have been updated since the OSP ended. But there is something there.
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<palomer>
ho hum
<palomer>
looks like I'll be diving into caml4p soon
<Yoric[DT]>
\o/
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