#crystal-lang on 2020-01-20 — irc logs at freenode.irclog.whitequark.org

2019-12-18 20:23 ChanServ changed the topic of #crystal-lang to: The Crystal programming language | http://crystal-lang.org | Crystal 0.32.1 | Fund Crystal's development: http://is.gd/X7PRtI | GH: https://github.com/crystal-lang/crystal | Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/ | Gitter: https://gitter.im/crystal-lang/crystal

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00:12 <FromGitter> <stnluu_twitter> Does crystal have recursive tail call optimization?

00:13 <FromGitter> <tenebrousedge> not as such

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00:21 <FromGitter> <bew> @tenebrousedge for @dscottboggs_gitlab, that would work!

00:23 <FromGitter> <dscottboggs_gitlab> oh, nice!

00:27 <FromGitter> <dscottboggs_gitlab> > Does crystal have recursive tail call optimization? ⏎ ⏎ > not as such ⏎ ⏎ 👀 [https://gitter.im/crystal-lang/crystal?at=5e24f409a1dfaa3ba14b1efb]

00:28 <FromGitter> <tenebrousedge> https://github.com/crystal-lang/crystal/issues/5143#issuecomment-337868568

00:28 <FromGitter> <tenebrousedge> ^ "not guaranteed"

00:29 <FromGitter> <dscottboggs_gitlab> right, it's "probably gonna happen" because we use LLVM

00:29 <FromGitter> <dscottboggs_gitlab> but fair enough that probably isn't "yes"

00:30 <FromGitter> <dscottboggs_gitlab> regardless i don't think its a problem in this case, but good to remember

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02:52 <FromGitter> <dscottboggs_gitlab> How does one run a subset of tests from the stdlib? I ran `crystal spec spec/json/` and reasonably got ⏎ ⏎ ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=5e2516055b81ab262e57898a]

02:53 <FromGitter> <Blacksmoke16> Should be the latter

02:54 <FromGitter> <Blacksmoke16> Maybe try clearing cache and rebuilding?

02:54 <FromGitter> <dscottboggs_gitlab> `make clean_crystal`?

02:55 <FromGitter> <Blacksmoke16> Make clean, and also ~/.cache/crystal

03:17 <FromGitter> <dscottboggs_gitlab> yeah it works now thanks

03:22 <FromGitter> <Blacksmoke16> Np

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10:16 <FromGitter> <manveru> is there some equivalent to the ruby pack/unpack functions? i got some binary data that i'd like to convert into an array of bytes of specific length

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11:16 <Stephie> @manveru you probably want to look at https://crystal-lang.org/api/master/IO.html#read_bytes(type,format:IO::ByteFormat=IO::ByteFormat::SystemEndian)-instance-method

11:16 <FromGitter> <manveru> thanks

11:17 <FromGitter> <manveru> i found that eventually :)

11:17 <Stephie> ah

11:17 <Stephie> nice

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12:15 <FromGitter> <grkek> @Blacksmoke16 its been 29 days already

12:16 <FromGitter> <grkek> :^)

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12:35 <FromGitter> <grkek> also guys grip is on 16th

12:35 <FromGitter> <grkek> place of web-frameworks

12:36 <FromGitter> <grkek> benchmark thing

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13:12 <sorcus> grkek: congrats :-)

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13:54 <FromGitter> <soohwa> Hello, I would like to know if it is possible to pass a parameter "by reference" to a function (or a method) ?

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14:13 <FromGitter> <straight-shoota> @soohwa Class instances are always passed by reference. Structs and primitives are passed by value, but you can technically also pass a pointer. That's unsafe and usually not recommended.

14:36 <FromGitter> <soohwa> @straight-shoota Thanks a lot!

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17:26 <FromGitter> <tenebrousedge> this doesn't look right ⏎ https://play.crystal-lang.org/#/r/8fjx

17:27 <FromGitter> <tenebrousedge> I guess `match` is required :/

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19:26 <FromGitter> <rishavs> @grkek whats grip?

19:30 <sorcus> rishavs: https://github.com/grkek/grip

19:32 <FromGitter> <rishavs> 👍

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