#crystal-lang on 2019-04-05 — irc logs at freenode.irclog.whitequark.org

2019-02-01 17:11 RX14 changed the topic of #crystal-lang to: The Crystal programming language | http://crystal-lang.org | Crystal 0.27.1 | 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

00:25 <FromGitter> <Blacksmoke16> is there no way to reference `Nop`? https://play.crystal-lang.org/#/r/6npx

00:28 <FromGitter> <Blacksmoke16> nvm

00:28 <FromGitter> <Blacksmoke16> `.is_a? Nop`

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01:06 <FromGitter> <Blacksmoke16> ```code paste, see link``` ⏎ ⏎ Now are grouping commands under the same namespace [https://gitter.im/crystal-lang/crystal?at=5ca6aa03bd70a40d5ff92e75]

01:06 <FromGitter> <Blacksmoke16> whoa that code block didnt like that

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02:17 <FromGitter> <Blacksmoke16> ```code paste, see link``` ⏎ ⏎ And ability to get further detail on a specific command [https://gitter.im/crystal-lang/crystal?at=5ca6bab7bd70a40d5ff98aba]

02:18 <FromGitter> <Blacksmoke16> need to think of a good way to handle descriptions for the args

02:19 <FromGitter> <Blacksmoke16> any ideas?

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07:47 <FromGitter> <j8r> You don't need to specify the type. If you go standard, options should always be on/off switches, with `off` by default. You can also have `myvar=val` or `--myvar=val`

07:49 <FromGitter> <j8r> I created a declarative CLI that is compile-time safe if you want examples https://github.com/j8r/clicr

08:40 <FromGitter> <j8r> there is still this annoying `Invalid encoding: GB2312 (ArgumentError)` issue on Alpine 😬

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11:12 <wuehlmaus> is the change from Time.now to Time.local etc brand new? because the main webpage about crystal still has Time.now

11:18 <wuehlmaus> puh, it is. i thought the webpage was wrong, that would be a pity, all good.

11:23 <FromGitter> <j8r> `Time.now` is deprecated

11:25 <wuehlmaus> so perhaps the example on crystal-lang.org should be changed :-)

11:26 <wuehlmaus> plus the example on wikipedia

11:26 <FromGitter> <j8r> true

11:27 <FromGitter> <j8r> it's worth to mention this in https://github.com/crystal-lang/crystal/pull/7586, for crystal-lang at least.

11:45 <FromGitter> <malkomalko> Can anybody explain what's going on with https://play.crystal-lang.org/#/r/6nrt ?

11:49 <jhass> Hash's default value is returned on missing keys, it's not set to the key as a missing key is accessed

11:51 <jhass> https://play.crystal-lang.org/#/r/6ns9 use block form and assign the key

11:53 <jhass> also https://play.crystal-lang.org/#/r/6nsc to illustrate the initial issue

11:53 <FromGitter> <malkomalko> Ah hah! Makes perfect sense now. Thank you

11:56 <FromGitter> <r00ster91> why does ⏎ ⏎ ```b = uninitialized Int32 ⏎ ⏎ asm("mov $$123, $0" :: "=r"(b)) ⏎ ⏎ b # => error``` ⏎ ⏎ fail? What do the different colons mean? [https://gitter.im/crystal-lang/crystal?at=5ca74251bd70a40d5ffce98b]

12:07 <FromGitter> <bew> iirc it's `<asm>:<inputs>:<outputs>:<optimization flags>` (or maybe input & output reversed)

12:07 <FromGitter> <Blacksmoke16> @j8r My thing will convert the arguments to their expected types, so i figured it would be helpful to list what each argument would get converted into

12:08 <FromGitter> <bew> @r00ster91 it was reversed: https://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html#s5

12:09 <FromGitter> <r00ster91> but what do the different amount of colons mean?

12:10 <FromGitter> <r00ster91> on this document they always use only one colon

12:10 <FromGitter> <r00ster91> oh I think I somewhat understand now

12:10 <FromGitter> <j8r> @Blacksmoke16 the best would be to use an existing CLI builder here https://github.com/veelenga/awesome-crystal#cli-builders

12:11 <FromGitter> <j8r> not sure it's a good idea to add types to CLI variables - ARGV is all about strings.

12:12 <FromGitter> <Blacksmoke16> well it still read them as strings, just supplies them to the execute method as their converted value

12:12 <FromGitter> <j8r> I think better to have a description, explaining the expected input

12:13 <FromGitter> <Blacksmoke16> ideally yea, but have any ideas on where to have that set?

12:13 <FromGitter> <Blacksmoke16> since they just get pulled from the methods arguments in a macro...

12:14 <FromGitter> <j8r> not simple 😅

12:15 <FromGitter> <Blacksmoke16> ikr? :(

12:16 <FromGitter> <j8r> have you an example?

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12:16 <FromGitter> <Blacksmoke16> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=5ca7471925686a7dc3dcee10]

12:16 <FromGitter> <Blacksmoke16> docs just get built from the method args and name/desc class vars

12:17 <FromGitter> <Blacksmoke16> isnt any other config to say like `path - The path where to create the file`

12:18 <FromGitter> <Blacksmoke16> i suppose i could use the config file, key be name of the command, then each param/descrip

12:18 <FromGitter> <Blacksmoke16> like

12:18 <FromGitter> <Blacksmoke16> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=5ca747b1016a930a45697998]

12:19 <FromGitter> <Blacksmoke16> not a big fan of that tho :/

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13:31 <Jenz> Why is `Time.now` deprecated?

13:31 <Jenz> Seems very sensible to me

13:32 <Jenz> (The method)

13:35 <jokke> was there a way to get the value of a type variable for a generic class/module in a method?

13:35 <jokke> *in macro context

13:37 <Jenz> This?: https://crystal-lang.org/api/0.27.2/Crystal/Macros/Generic.html#resolve%3AASTNode-instance-method

13:37 <FromGitter> <kinxer> @Jenz I believe it's because of the addition of `Time.utc` and `Time.local` (the second of which has the same behavior as `Time.now`). The two newer methods actually specify in their names the location for the time, so it's a better interface.

13:37 <Jenz> Ah I see, OK, thanks kinxer

13:39 <FromGitter> <kinxer> Np.

13:41 <FromGitter> <michalvalasek> hey everyone!

13:42 <FromGitter> <michalvalasek> one quick question: is it normal that the instalation via homebrew takes 2 hours (and still going on)?

13:43 <FromGitter> <michalvalasek> it seems to be stuck at the `cmake -G Unix Makefiles ..` step

13:43 <FromGitter> <michalvalasek> CPU usage at 100% the whole time (clang)

13:44 <FromGitter> <Blacksmoke16> 😬

13:45 <FromGitter> <Blacksmoke16> prob not normal

13:47 <Jenz> Definitely not normal (especially it being clang)

13:48 <jokke> Jenz: hm on what would i invoke type_vars?

13:48 <jokke> i tried @type

13:48 <jokke> but that's already a TypeNode

13:49 <jokke> ahh

13:49 <jokke> it's a class method

13:49 <FromGitter> <michalvalasek> thanks!

13:49 <jokke> that doesn't make it easier

13:49 <jokke> or rather a module method

13:51 <FromGitter> <Blacksmoke16> can you make a playground link?

13:51 <FromGitter> <Blacksmoke16> dealing with types in macro land is kinda a pita since they can be a bunch of diff things depending on context

13:51 <jokke> tru

13:51 <jokke> https://p.jokke.space/Pdd/

13:52 <jokke> goal is to try and use a converter of the same name as T

13:53 <jokke> for the element

13:53 <jokke> s

13:54 <FromGitter> <Blacksmoke16> so you want the types of `T` yea?

13:56 <FromGitter> <Blacksmoke16> https://play.crystal-lang.org/#/r/6ntp is not just not as simple as https://play.crystal-lang.org/#/r/6ntp ?

13:56 <FromGitter> <Blacksmoke16> can reference `T` in the macro

13:57 <Jenz> Wouldn't even need macros for that apparently: https://play.crystal-lang.org/#/r/6ntt

13:59 <FromGitter> <Blacksmoke16> would if you needed to do stuff with it in macro land, i.e. iterate over each type in the union

14:00 <jhass> or prefix it with another constant

14:01 <FromGitter> <Blacksmoke16> ye

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14:16 <FromGitter> <chussenot> Hi Guys I'm working on a lib to parse the events generated by the GitLab webhooks

14:16 <FromGitter> <chussenot> https://github.com/chussenot/gitlab-webhooks

14:16 <FromGitter> <chussenot> It's not stable

14:17 <FromGitter> <chussenot> At final state we can plan to merge it with this shard

14:17 <FromGitter> <chussenot> https://github.com/icyleaf/gitlab.cr

14:17 <FromGitter> <chussenot> cc @icyleaf

14:18 <FromGitter> <chussenot> So please, I'm looking for someone for a first review

14:18 <FromGitter> <chussenot> Cheers

14:19 <FromGitter> <chussenot> Send me a private message if you are interested to contribute

14:21 <Jenz> Nice! Personally I don't use gitlab, but any extension to the crystal ecosystem is most welcome. :D. And it's called "an example, many examples", not "exemples". XD

14:27 <FromGitter> <chussenot> thx Jenz

14:31 <FromGitter> <chussenot> the typo is fixed

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14:38 <jhass> gotta love how both of these are hosted on github :D

14:44 <FromGitter> <Blacksmoke16> :S

15:43 <FromGitter> <TheOnlyArtz> https://play.crystal-lang.org/#/r/6nuy

15:44 <FromGitter> <TheOnlyArtz> Why doesn't it work

15:44 <FromGitter> <TheOnlyArtz> :thinking:

15:44 <FromGitter> <j8r> `require "json"`

15:44 <FromGitter> <Blacksmoke16> ^

15:45 <FromGitter> <TheOnlyArtz> Right

15:45 <FromGitter> <TheOnlyArtz> thank you.

15:47 <FromGitter> <TheOnlyArtz> I can't manage to send a JSON body ?

15:47 <FromGitter> <TheOnlyArtz> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=5ca77892016a930a456ae3e5]

15:47 <FromGitter> <TheOnlyArtz> Am I getting something wrong?

15:55 <FromGitter> <Blacksmoke16> try `pp response` and make sure its there

15:56 <FromGitter> <TheOnlyArtz> It's there.

15:56 <FromGitter> <TheOnlyArtz> I got the response

15:56 <FromGitter> <TheOnlyArtz> `{"source_code":["can't be blank"],"language_id":["can't be blank"]}`

15:56 <FromGitter> <TheOnlyArtz> But since I get such a message it looks like the body is wrong

15:56 <FromGitter> <TheOnlyArtz> or... didn't arrive

15:56 <FromGitter> <TheOnlyArtz> Which this is probably the case ^

15:58 <FromGitter> <Blacksmoke16> try `response.body.gets_to_end`

15:58 <FromGitter> <TheOnlyArtz> `""`

15:59 <FromGitter> <TheOnlyArtz> So the body didn't arrive?

16:00 <FromGitter> <Blacksmoke16> if it shows up in `pp response` its prob there

16:00 <FromGitter> <TheOnlyArtz> What about the body I send

16:00 <FromGitter> <TheOnlyArtz> it looks like it's not in the right place?

16:01 <FromGitter> <Blacksmoke16> according to the docs thats fine

16:01 <FromGitter> <Blacksmoke16> should just have to do `response.body_io.gets`

16:01 <FromGitter> <Blacksmoke16> https://crystal-lang.org/api/0.27.2/HTTP/Client.html#post%28url%3AString%7CURI%2Cheaders%3AHTTP%3A%3AHeaders%3F%3Dnil%2Cbody%3ABodyType%3Dnil%2Ctls%3Dnil%2C%26block%29-class-method

16:01 <FromGitter> <TheOnlyArtz> I'm telling you the request body is not okay/

16:02 <FromGitter> <TheOnlyArtz> The request body is correct according to the dummy client of the API

16:03 <FromGitter> <TheOnlyArtz> I'm sending `language_id` and `source_code` in the body

16:03 <FromGitter> <TheOnlyArtz> And the server says they are both blank

16:04 <FromGitter> <TheOnlyArtz> (https://files.gitter.im/crystal-lang/crystal/SqPM/image.png)

16:04 <FromGitter> <TheOnlyArtz> See ?

16:06 <FromGitter> <r00ster91> What is the difference between https://github.com/crystal-lang/crystal/blob/master/src/base64.cr and https://github.com/crystal-lang/crystal/blob/master/src/crypto/bcrypt/base64.cr ?

16:11 <FromGitter> <r00ster91> I feel like the base64 implementation is duplicated

16:36 <FromGitter> <TheOnlyArtz> I manage to get a request to work using Node.js but not with Crystal

16:36 <FromGitter> <TheOnlyArtz> What's going on

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16:54 <FromGitter> <TheOnlyArtz> I've managed to get it working using `Crest`

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17:13 <FromGitter> <TheOnlyArtz> Is it possible to compile and run C within Crystal itself?

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17:28 <FromGitter> <Blacksmoke16> :shrug;

17:28 <FromGitter> <Blacksmoke16> isnt that the point of the bindings? to run the c code in crystal

17:28 <z64> no, crystal does not have embedded C code, etc., just C bindings

17:30 <FromGitter> <TheOnlyArtz> Alright

17:59 <FromGitter> <TheOnlyArtz> Can I force a spec to fail?

17:59 <FromGitter> <TheOnlyArtz> I want to output a stdout of my own

18:02 <FromGitter> <Blacksmoke16> https://crystal-lang.org/api/0.27.2/Spec/Methods.html#fail%28msg%2Cfile%3D__FILE__%2Cline%3D__LINE__%29-instance-method

18:09 <FromGitter> <TheOnlyArtz> https://gist.github.com/TheOnlyArtz/e02af15636f5dfd21d4d7857c491dc30

18:09 <FromGitter> <TheOnlyArtz> I'm working on unit testing for C through Crystal as the backend

18:09 <FromGitter> <TheOnlyArtz> Finished writing a small demo for the proof of concept

18:10 <FromGitter> <TheOnlyArtz> Using the example

18:10 <FromGitter> <TheOnlyArtz> (https://files.gitter.im/crystal-lang/crystal/NlPG/image.png)

18:11 <FromGitter> <Blacksmoke16> neat

18:11 <FromGitter> <TheOnlyArtz> Expecting the wrong stdout

18:11 <FromGitter> <TheOnlyArtz> (https://files.gitter.im/crystal-lang/crystal/3Qhl/image.png)

18:11 <FromGitter> <TheOnlyArtz> And it can even display when a compile error occurs and where it occurs

18:11 <FromGitter> <Blacksmoke16> i still would like to figure out a way to test compile time errors

18:12 <FromGitter> <TheOnlyArtz> Test compile time errors?

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18:12 <FromGitter> <TheOnlyArtz> Something like that?

18:12 <FromGitter> <TheOnlyArtz> (https://files.gitter.im/crystal-lang/crystal/6CVe/image.png)

18:13 <FromGitter> <Blacksmoke16> hm

18:13 <FromGitter> <Blacksmoke16> sec

18:18 <FromGitter> <Blacksmoke16> https://play.crystal-lang.org/#/r/6nw8

18:19 <FromGitter> <Blacksmoke16> to test that that program would fail to compile with error `Bar Must implement #method`

18:31 <z64> @Blacksmoke16 you can of course, test it the same way you do manually: https://play.crystal-lang.org/#/r/6nwy

18:35 <FromGitter> <Blacksmoke16> hmm, prob possible to make that a reuseable method?

18:36 <z64> certainly. ideally, you would have some `spec/compile_errors/` dir that you would put individual examples of code that shouldn't compile

18:37 <z64> (i just made a tempfile because, play.crystal-lang.org)

18:38 <z64> then you write some spec helper that runs it and returns the whole error string, or maybe you make some `record CompileResult, process_status : Process::Status, error : String`

18:39 <z64> or w/e :p

18:40 <FromGitter> <Blacksmoke16> neat

18:41 <FromGitter> <Blacksmoke16> that'll be super helpful for athena

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18:44 <FromGitter> <Blacksmoke16> https://play.crystal-lang.org/#/r/6nxn 💯

18:45 <z64> yep

18:45 <FromGitter> <Blacksmoke16> good stuff

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19:18 <FromGitter> <TheOnlyArtz> can Crystal be used for AI and ML?

19:29 <FromGitter> <bew> Sure

19:30 <FromGitter> <TheOnlyArtz> Any examples for applications?

19:37 <FromGitter> <bew> This https://www.neuralegion.com :p

19:38 <FromGitter> <bew> https://github.com/NeuraLegion/shainet

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21:01 <FromGitter> <Blacksmoke16> well there you go

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22:31 <FromGitter> <jwoertink> Has anyone come across a html beautifier in crystal yet?

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23:14 <confact> i would take that as no. Because I haven't and anyone else is quiet.

23:23 <FromGitter> <Blacksmoke16> prob would have to make your own

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