cjeris changed the topic of #ocaml to: Discussions about the OCaml programming language | http://caml.inria.fr/
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<tz>
Is there any documentation regarding the proper way to split up the interface/implementation of classes? I downloaded unison to see what it did but it doesn't appear to use classes.
<Smerdyakov>
Hardly anyone in the OCaml world use classes.
<Smerdyakov>
I'd recommend you think long and hard before doing so in every particular case.
<tz>
That was going to be my next question, there didn't seem to bee much use in code I've looked at
<tz>
Is there any particular reason why? For an example I am going to implement a few earth models (spherical, oblate, etc.). My first idea was to have a earth_model virtual base class and then have spherical and oblate inherit it
<Smerdyakov>
OO was invented for simulations. It's quite likely to be a good fit there.
<tz>
So for places where I intend on having virtual methods, use classes. But for things like coordinate frames, vectors, don't use them
<Smerdyakov>
No.
<Smerdyakov>
First-class functions work better for most uses of virtual methods.
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<MarcWeber>
Where can I read more about the type unit? (return value of print_string ?)
<Smerdyakov>
It has one value, ().
<Smerdyakov>
That's all you need to know.
<MarcWeber>
Ah. So let main () let foo () does mean the function has one argument beeing () in any case, right?
<Smerdyakov>
Yes
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<MarcWeber>
I'm trying to compile the MLChineseChess application using F#. I'm getting the error that there are two matching overloaded messages. (float32 and int). How do I select the right one using type hinting? The line is grfx.DrawLine(pen,x-3-sx,y-3,x-3,y-3);
<MarcWeber>
You can point me to the documentation, too. I just don't know which keyword to use.
<MarcWeber>
Got it :int is working with some ( )
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<pi-meson>
I'm thinking about writing an ocaml interface to the hdf5 hierarchical data format, but i'm curious where to start
<pi-meson>
are there any good examples of file format APIs in ocaml that people would recommend as a starting point?
<pi-meson>
(or should I just loosly wrap the hdf5 library?)
<mikeX>
you mean create a C wrapper?
<pi-meson>
mikeX: yea, just create a loose wrapper
<pi-meson>
basically, I'm asking if there's a good stateful disk data interface / library for ocaml that I could use as an example of "the ocaml way", or if I should just not worry about that and write a loose c wrapper
<mikeX>
not sure about such a library, but since it's a format specification more so than a library, you might as well implement it in ocaml
<mikeX>
you might still have some issues with szip and zlib though
<pi-meson>
mikeX: my understanding was that the First Rule of HDF5 was "don't implement your own hdf5lib"
<mikeX>
oh, didn't know that, didn't really know anything about hdf5 10 minutes ago : )
<mikeX>
in that case a C wrapper might be more appropriate
<mikeX>
but it's always an extra dependency : /
<pi-meson>
yea, and it's going to be ugly and imperative
<pi-meson>
but okay, that'll at least be a good first start
<cjeris>
"I have to interface with ugly and imperative code" is one of the strengths of ocaml, isn't it? :)
<pi-meson>
cjeris, you're right
<pi-meson>
a friend got an Ocaml summer project for doing some data visualization, and I wanted to use this as an excuse to rewrite some lab software in ocaml, but it'll have to talk hdf5
<pi-meson>
but great, thanks everyone!
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<hcarty>
Curses... another HDF-hopeful and I missed them
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<mnemonic>
hi
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