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<xvilka>
Hi! If I want to use Lwt_io.printf in Hashtbl.iteri, what is the best way to do that? For now I use it like: Hashtbl.iteri (fun k v -> Lwt_io.printf "key %s value %s\n" k v; ()) someht
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<reynir>
you can drop the »; ()« if you like
<reynir>
wait
<reynir>
Lwt_io.printf...
<xvilka>
reynir: I have to use Lwt_io.printf to keep printing in sync with the rest parts
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<Leonidas>
xvilka: you can't combine Hashtbl.iteri with Lwt_io.printf
<Leonidas>
xvilka: you need to map and then use an Lwt combinator with a signature of 'a Lwt.t list -> 'a Lwt.t to reduce the list to a single "promise".
<Leonidas>
that should work with Lwt.join apparently
<KeyJoo>
Hi! I use Linux Mint 18.3 Cinnamon. In Os installed Ocaml (system I system System compiler (4.02.3) + (4.05.0 C 4.05.0 Official 4.05.0 release) How set default 4.05.0?
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<sshine>
can anyone point to some more examples of the use of the 'react' package? there's a 20 LOC clock and 450 LOC game.
<freyr69>
There are obus and lambda-term which use it heavily
<freyr69>
But it's quite simple and straightforward if you are into the topic
<freyr69>
Are you have problems with it?
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<_y>
so, documentation in opam always bugged me
<_y>
do i understand correctly that no one install HTML documentation in $(opam config var doc)/ , but rather README, LICENSE, and some ad hoc stuff like example code ?
<hannes>
_y: yes, this seems to be the case. there is odig (https://github.com/dbuenzli/odig/), also available as an opam package, which produces html documentation from your local opam switch (by using ocamldoc or odoc)! :)
<_y>
and that option --build-doc most likely builds the said HTML documentation, which remains in the build directory and is never installed, and thus lost when the build directory is removed?
<_y>
hannes, yes, i heard of odig a few days ago, and it changed my life, really :-)
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<_y>
i am asking so that i can follow the community conventions for my own stuff
<_y>
i find it really weird to have a doc/ directory and not fill it with the actual documentation
<_y>
and to have a --build-doc which is virtually useless and not connected to the said doc/ directory
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<sshine>
hello hannes :)
<_y>
(plus, it seems really hard to trick dune into installing the generated HTML documentation, apparently i would have to list all individual files)
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<flux[m]>
I really like how the docs generated by odig seem to cross reference to other packages just fine. Maybe it's accident, maybe by design?-)
<zozozo>
_y: I think the solution that is appearing is to not install html doc, but instead leave everything in the .cmi files (which need to be installed anyway), so that documentation can be generated (and cross-reference done correctly as flux[m] said)
<_y>
zozozo, oh does o(caml)doc uses the .cmi files? i thought they used .mli files
<discord>
<bobby> flux[m]: it's definitely by design. cross references are one of odig + odoc initial focus points afaik
<flux[m]>
I think it must use at least the .mli files, surely the comments never end up in the .cmis :)
<flux[m]>
..although it would be quite cool if they did?!
<flux[m]>
it'd be cool if toplevel could tell us documentation as well.
<_y>
that’s unconvenient, i came to the conclusion not to install the .cmi files of modules other than the toplevel one, so that internal modules are not exposed…
<_y>
which btw is completely hackish, but i couldn’t find a better solution
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<flux[m]>
I would certainly agree with that
<flux[m]>
because with the internal .cmi:s in the search path you just bring back the name space problem
<flux[m]>
but surely the toplevel .cmi exposes the information you need to expose?
<discord>
<bobby> I think @rizo could shed some light here
<zozozo>
_y: well, I forgot about specifics, but from a quick search, odoc seems to use .cmti (note the t) files which do contain the comments
<flux[m]>
or is the problem going from a packed .cmi to individual .mli:s?
<flux[m]>
btw, if the documentation was embedded in .cmis, that would Just Work(TM)..
<flux[m]>
ah, nice. are they also packed? or how is the namespace issue solved with them?
<zozozo>
(on the other hand, ocamldoc still uses .mli files, :p )
<_y>
29/08 14:29 <flux[m]> but surely the toplevel .cmi exposes the information you need to expose? → if you are speaking about the interface, yes it does; my concern was that it may lack the doc-comments, if that was the case that odoc used *.cmi
<zozozo>
I think that packs generate the correct packed .cmti files containing all the info in the individual .cmti files
<_y>
zozozo, oh fine, then i guess than i can provide the individual *.cmti
<sagotch>
Hey.
<zozozo>
_y: I'm not absolutely sure though, so it'd be better to try and check that eveything works as intended, ^^
<zozozo>
sagotch: hi
<sagotch>
I do not understand how to hide modules from a library using `dune`. I have multiple `lib` and `internal` directories. If I want to use modules from `internal` into lib, do I NEED to use a public name for `internal` (as the error msg says). If I use a public name, `dune build @install` will include and expose this `Internal` module, right?
<Leonidas>
sagotch: you need to use a public name? I use internal libraries a lot without having to define them
<sagotch>
Are they in separate folders?
<Leonidas>
yes
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<Leonidas>
I never have multiple libraries in separate folders, because I don't feel like definint (modules …)
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<sagotch>
If I do not give a public name -> "Library "geneweb_internal" is private, it cannot be a dependency of a public library." while trying to build geneweb_lib
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<discord>
<rizo> Regarding the doc discussion: odoc does indeed work on both cmi and cmti files. Those contain docstrings in the Parsetree as annotations, ie, [@@doc {| ... |}. The same information is stored in odoc files.
<_y>
and now it seems that zarith has vanished as well, WTF
<zozozo>
_y: actually, I was thinking of swithcing to dune when I have the time because dune know what to install and where, so you don't have to worry about that, :p
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<_y>
zozozo, i am using dune, but it exposes modules you would like to be hidden
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<zozozo>
ah... I don't have much of these in my projects usually
<sagotch>
There should be a way to hide modules, this something used very often, isn't it ?
<sagotch>
For now, the only solution I see is to define a module to write your interface by hand, and use copy_files to include files from another directory
<_y>
zozozo, well, even in that case, you would like Mylib__{Foo,Bar,Lol} not to show up in autocompletion when using module Mylib
<sagotch>
I would say it is not really praticle
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<_y>
(which contains Mylib.{Foo,Bar,Lol})
<zozozo>
_y: that's not a problem that can easily be solved without namespaces, so currently I'd say it's more the job of the auto-completion mechanism to hide the prefixed module names (but they must be available for everything to compile correctly)
<sagotch>
(and copy_files does not seem to be meant to be used in a library stanza)
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<_y>
zozozo, you are right, apparently both .cmi files and .cmti files of internal modules are required for “odig odoc” to build the documentation
<_y>
the .cmi and .cmti files of the toplevel module is not enough
<_y>
hmm sorry, rizo was right
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<sshine>
what's the difference between writing 'open Core' and 'open Core.Std'?
<_y>
zozozo, after your remark about autocompletion, i just tried it in merlin and saw that it hides the Mylib__* modules :-)
<sshine>
oh, 'open Core.Std' is old?
<_y>
utop is not as smart though
<Leonidas>
sshine: yes, thats from the 1xx.yy.zz æra
<Leonidas>
since v0.9 it is open Core
<Leonidas>
Drup: you're in Germany? TIL
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<sshine>
is there a Standard ML-equivalent of 'op'? e.g. op:: returns the :: operator as prefix.
<sshine>
(and in Haskell it'd be (::))
<sshine>
e.g. 'List.fold_right op:: []'
<sshine>
err, 'List.fold_right ~f:op:: ~init:[]'
<zozozo>
sshine: in ocaml (op) works the same (for instance (+) 1 2), however, as :: is not a function it doesn't work for it
<sshine>
ah, but Core seems to have List.cons for this.
<companion_cube>
even the stdlib has it, now, I think
<sshine>
ok. I'll go with that.
<sshine>
I coincidentally saw it earlier.
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<sshine>
hannes, is the 'react' package compatible with MirageOS? I mean, would you ever combine FRP with MirageOS?
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<_y>
so what became the idea of turning (::) and [] into normal constructors ?
<reynir>
they are
<_y>
oh indeed
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<_y>
is there any plan to remove the .() == Array.get hack ?
<_y>
especially now that custom indexing operators are there
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<lyxia>
what custom indexing operators
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<_y>
octachron, thanks, i saw this PR but overlooked it as it contained many more things
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<psteckler>
hi
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<Eskatrem>
Hello, I am trying to build a quick video game to learn ocaml. Can I animate objects with the Graphics library?
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<thizanne>
Eskatrem: no you can't
<thizanne>
Graphics is very minimal, you can't do much with it
<thizanne>
however you can redraw your frame to update it
<Eskatrem>
thizanne but I suppose that you cannot, for example, change the coordinates of a certain object of the frame, right?
<thizanne>
well, when i said you can't do much, I meant that it won't do much for you
<thizanne>
so you can't have an "object" on the frame and then change its coordinates and poof it gets visually updates
<thizanne>
you don't even have objetcs on the frame, you draw on it like a whiteboard
<Eskatrem>
yes, I get it, you have to modify the coordinates of the object you want to move and redraw the whole frame
<Eskatrem>
yes, that was the impression I had - it works like a whiteboard
<Eskatrem>
if Graphics is too minimal, are there other modules you're recommend?
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<thizanne>
well first, being minimal isnt necessarily bad for learning
<thizanne>
then I don't know much about the state of ocaml libs for graphics and stuff
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<thizanne>
we have bindings to sdl at least, which are minimal (no idea what that actually means, except it'll still be more than graphics), look up for tsdl
<Eskatrem>
yeah, I had a look, but there wasn't much documentation, that's why I came here to ask about the current "best" library for a quick 2D video game
<thizanne>
last time I checked (but I did not use it) there wasn't documentation because it was a transparent bindings of sdl
<thizanne>
so the documentation is sdl's original documentation, and then you just use the ocaml names instead
<thizanne>
probably not the best choice if you don't already know SDL though, unless you want to learn both
<thizanne>
you can probably do well with Graphics, having an internal game_state type that you update, and a draw : game_state -> unit function to draw it on your cleaned window
<Eskatrem>
I didn't know SDL existed until a few hours ago...
<Eskatrem>
hmm ok maybe graphics is better to just play around