<FromGitter>
<georgeu2000> I guess this works: ` z = { "query"=> "foo" } of String => String`
<FromGitter>
<georgeu2000> Thanks, that worked.
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<FromGitter>
<ezrast> You can actually leave out the `of String => String` in this case; it's only needed for an empty literal or when you want the types to be something more general than what the compiler can figure out.
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<FromGitter>
<georgeu2000> I see. Thanks.
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<FromGitter>
<ethagnawl> Hi, all. has anyone had success running `crystal deps` on a Raspberry Pi? I'm met with: "/opt/crystal/embedded/bin/shards: symbol lookup error: /opt/crystal/embedded/bin/shards: undefined symbol: GC_get_push_other_roots" when I try. FWIW, I'm using the build of Crystal available via http://public.portalier.com/raspbian/ and I've tried installing every dependency I've seen suggested, including Boehm GC.
<FromGitter>
<ethagnawl> Also, is anyone aware of a Crystal Shard which wraps up WiringPi? I've looked around but haven't found anything. I've got a proof-of-concept working and I've learned a bit while building it out, but I don't want to sink too much time into it if anyone else has already solved that problem.
<FromGitter>
<HCLarsen> @ethagnawl I tried using the stuff on public.portalier.com/raspbian, and it simply didn't work.
<FromGitter>
<ethagnawl> @HCLarsen Interesting. I didn't have any issues until I tried to install dependencies.
<FromGitter>
<HCLarsen> Step 3 always gives me an error saying that there's an issue with the key.
<FromGitter>
<ethagnawl> What about any of the other options? e.g. cross-compiling for the Pi
<FromGitter>
<ethagnawl> It's just such a compelling use case for Crystal... The Crystal version of my silly motion detector program uses an order of magnitude less memory than the Python version.
<FromGitter>
<HCLarsen> There are no other options on that page.
<FromGitter>
<HCLarsen> Of course it's a compelling use case, which is why I've been after this for months.
<FromGitter>
<Brusalk> How should kwargs work with macros?
<FromGitter>
<Brusalk> I'm seeing something that I think is odd, but I'm not familiar with macros enough to know if it really is strange: ⏎ ⏎ ``` Args: {1, 2, 3, "hi"} ⏎ Kwargs: {}``` ⏎ ⏎ It seems like the kwarg is packed into args, rather than kwargs? [https://gitter.im/crystal-lang/crystal?at=59dc5225bac826f0545612a8]
<FromGitter>
<Brusalk> ... which seems wrong to me
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<FromGitter>
<monouser7dig> @RX14 sure I know that is why I like type, please not remove it, would be even better if you could restrict its range and its operator (e.g. create an Int that can not be multiplied) see https://github.com/foonathan/type_safe
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<FromGitter>
<monouser7dig> you can actually as well pass instances of a struct with just one property around and have functions that only accept that struct/ class instead of its instance ⏎ ⏎ ```struct myint ⏎ @Int ⏎ end ⏎ ⏎ foo(I : myint)``` ⏎ ⏎ but that is just insanity [https://gitter.im/crystal-lang/crystal?at=59dc67ba614889d4759686ac]
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<Yxhuvud>
@monouser7dig: I probably won't start to do heavy rewrites on the grammar any time soon. There are other optimizations I am looking at that will give better optimizations yet.
<Yxhuvud>
(and actually it is the right recursion that is troublesome. left recursion is *very* well behaved in earley parsers).
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<Groogy>
Morning!
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<Papierkorb_>
Moin
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<FromGitter>
<Rinkana> Morning
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<Papierkorb_>
if you can't be sure it's String in 100% of the calls, the compiler can't either
<Papierkorb_>
Your code may work in Ruby. But even there it's wrong
<Papierkorb_>
You can of course use other shorthands, like Object #try
<Papierkorb_>
as in `if name = user.name.try(&.last_name)`
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<watzon>
Try seems to be the less messy solution, I had it working using `as` as well
<Papierkorb_>
.as would simply throw a cast error. if you don't care, use #not_nil! for such cases.
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<watzon>
I'm interested though, how would you refactor that section?
<Papierkorb_>
Having those #cmd blocks in the super looks whacko
<watzon>
Lol yeah it's just some starting code to get things working
<Papierkorb_>
If the shard isn't advanced enough to declare a command on a method, at least move each cmd into its own method
<Papierkorb_>
def install_start_command; cmd "start" do .. end; end
<Papierkorb_>
Use %{} or HEREDOCS for multiline strings to make them more obvious
<watzon>
Good point
<watzon>
I haven't used Crystal in a couple months and I've been stuck in the land of Javascript, so I'm a bit rusty
<Papierkorb_>
`params[x][y]` is ruby style. Prefer structure and type safety over dynamic structures whenever possible. If not possible, break the dynamic structure down to somethin less dynamic as fast as you can in your code
<Papierkorb_>
E.g., do the `user = params[0]` before the if, and then check if `user.starts_with?('@')`
<Papierkorb_>
In my code, I may do `if (user = params[0]).starts_with?('@')`, but this syntax is 'controversial' in the community. I don't see much wrong with it as first step
<Papierkorb_>
Oh now I see, you want the user later on
<watzon>
Yeah, the main point of the block so far is determining the user
<Papierkorb_>
So that's another thing then: Refactor that big if-elsif-else block there into its own method. Could be a generally useful functionality. In any case, much more readable
<Papierkorb_>
Prefer using idiomatic functionality like String#starts_with? (etc) over manually doing `str[0] == '?'`
<FromGitter>
<crisward> @sdogruyol x2 compile times would be nice.
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<Papierkorb_>
watzon: With all of that in place, I think it'd be easy on the eyes, including that time in 4 months you need to fix some unexpected behaviour
<watzon>
Papierkorb_: Thanks for the tips
<watzon>
Let's see if I can't get myself back into Crystal mode
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<crystal-gh>
[crystal] jackturnbull opened pull request #5095: Use query string from URI-based instantiation (master...master) https://git.io/vdVIc
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<crystal-gh>
[crystal] straight-shoota opened pull request #5096: Remove `expect_raises` matcher without type argument (master...jm-remove-expect-raises) https://git.io/vdV3c
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<Papierkorb_>
... anyone else started to tag types in Ruby code in Crystal style?
<Papierkorb_>
Could never remember how YARDs notation worked..
<FromGitter>
<OldhamMade> hey everyone. I'm getting intermittent errors running kemal when I build with `--release --no-debug`. seems to bail on first-run, with the following error: ⏎ ⏎ ``` code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=59dcb5c2bac826f054581035]
<FromGitter>
<OldhamMade> if I restart, it runs without issue, restart, and it'll fail... wondering how I can debug this
<Papierkorb_>
sdogruyol, ^ - Is Kemal closing listen sockets on application exit?
<FromGitter>
<OldhamMade> also, this is running within a docker container
<FromGitter>
<OldhamMade> can't seem to replicate on my local machine
<FromGitter>
<sdogruyol> @OldhamMade first time see
<FromGitter>
<sdogruyol> Seeing that
<FromGitter>
<OldhamMade> yeah, it's been solid since I started using it
<FromGitter>
<OldhamMade> I've not done too many changes to my app
<FromGitter>
<sdogruyol> You also use sentry?
<FromGitter>
<OldhamMade> I'm mostly wondering how I go about isolating the issue
<FromGitter>
<OldhamMade> yeah, that's a recent addition to try and help debug; I first noticed the problem deploying to the cloud
<FromGitter>
<sdogruyol> I'm not that knowledgeable about docker however I'm pretty sure @crisward can help you with that
<FromGitter>
<OldhamMade> since it's intermittent, it's hard to know what change I made may have introduced this bug into my code
<crystal-gh>
[crystal] akzhan opened pull request #5097: Use Random::Secure with Crystal::Hasher. (master...use-random-secure-in-crystal-hasher) https://git.io/vdVWd
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<FromGitter>
<crisward> @OldhamMade Not had that exact issue, but if it's happening during a restart I'd check how much memory your VM has. Memory usage spikes during rebuild.
<FromGitter>
<crisward> Actually it looks like it may have already started 😕
<FromGitter>
<crisward> Have you tried disabling sentry client to see if that fixes it? I seem to remember having issues with the sentry client when connecting to https.
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<FromGitter>
<straight-shoota> Hey =)
<Papierkorb_>
Yo
<FromGitter>
<bew> plop!
<FromGitter>
<straight-shoota> I'm using VS Code with the Crystal Language extension, but only recently. ⏎ For some reason the commands to toggle comments don't work in Crystal files... But I think they should (I'm not certain). Anyone got some clues?
<FromGitter>
<straight-shoota> I've tried key combinations as well as command pallette
<Papierkorb_>
Had the same issue actually when I tried VSCode
<Papierkorb_>
@faustinoaq may know more
<FromGitter>
<bararchy> Papierkorb_ It happens to me all the time by mistake while writing Ruby, I'm like ⏎ def bla(a : String) BOOOM syntax error, and I'm like WTF ? ahhh
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<FromGitter>
<crisward> @straight-shoota working fine in my vscode - not sure what I'm doing right
<FromGitter>
<yxhuvud> Hmm. Anyone got any good tips of how to let the types of locals in a block passed to a macro not not conflict with locals in the rest of the macro?
<FromGitter>
<faustinoaq> > A whole daemon just for commenting?
<FromGitter>
<faustinoaq> What do you mean ?
<FromGitter>
<faustinoaq> 😅
<Papierkorb_>
Read like I'd need scry for commenting to work
<Papierkorb_>
(Doesn't work for me either)
<FromGitter>
<bew> @yxhuvud what do you mean "the types of locals" ?
<FromGitter>
<yxhuvud> let me create a gist
<FromGitter>
<faustinoaq> Papierkorb_ No, comments are handled by VSCode, not daemon is needed for commenting 😅
<FromGitter>
<yxhuvud> Hmm. Or actually, I'll simply split it out and avoid locals in my macro.
<FromGitter>
<bew> you mean local variables?
<FromGitter>
<yxhuvud> Yes, what else could I mean?
<FromGitter>
<bew> I don't know ^^ just wanted to be sure
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<FromGitter>
<faustinoaq> Scry is just an optional server for formatting, search implementations and linting. ⏎ ⏎ Scry is optional because the vscode-crystal-lang extension already has these features using Node.js spawning crystal processes. The advantage of scry is one process on backgrounf, but currently one process with a huge amount of RAM aprox 500 MB, I'm thinking on implement scry using processes instead of the whole
<FromGitter>
<faustinoaq> Papierkorb_, So you should be able to use comments, this feature is not related to any background process on vscode-crystal-lang extension
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<FromGitter>
<straight-shoota> @faustinoaq any idea why comments couldn't be working? It seems only for crystal files.
<FromGitter>
<crisward> @faustinoaq sorry for confusing the matter. If it helps I think @straight-shoota is on linux, I'm on mac, mine works btw
<FromGitter>
<straight-shoota> No I'm on windows
<wmoxam>
😲
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<FromGitter>
<faustinoaq> > No I'm on windows ⏎ ⏎ @straight-shoota Oh, 😅 then try changing CRLF to LF
<FromGitter>
<faustinoaq> > @faustinoaq sorry for confusing the matter. If it helps I think @straight-shoota is on linux, I'm on mac, mine works btw ⏎ ⏎ I'm on Linux and works fine
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<FromGitter>
<straight-shoota> I'm already using LF everywhere
<FromGitter>
<faustinoaq> > any idea why comments couldn't be working? It seems only for crystal files. ⏎ ⏎ If you use crystal files as ruby files, Does comments work ?
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<FromGitter>
<straight-shoota> Yes, with Ruby syntax it works
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<FromGitter>
<straight-shoota> Not that I'm aware of..
<FromGitter>
<straight-shoota> But I'll try deactivating
<FromGitter>
<straight-shoota> Oh, the devtools now shows ⏎ ⏎ > ENOENT: no such file or directory, open 'C:\Users\Johannes\.vscode\extensions\faustinoaq.crystal-lang-0.3.4\crystal-configuration.json'
<FromGitter>
<straight-shoota> There is a backslash missing in the path 😲
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<FromGitter>
<straight-shoota> Reinstalled the plugin, and it works again... 🤔
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<FromGitter>
<faustinoaq> 😅
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<Papierkorb>
bararchy, Ping
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<FromGitter>
<bararchy> Papierkorb here , sorry :)
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<FromGitter>
<georgeu2000> @tbrand - Thanks. It is not even printing, so I'm not sure why...
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<FromGitter>
<OldhamMade> @crisward yeah, I've tried disabling sentry, with no change.
<FromGitter>
<OldhamMade> so, basically I'm building my docker container image, then I'll `docker run -it my/image` and hit the url, and it's a coin-toss as to whether it'll run happily or whether it'll bomb-out. if it runs, it's "running" -- there are no problems with subsequent requests.
<crystal-gh>
[crystal] straight-shoota opened pull request #5098: Add parenthesis to all occurences of expect_raises (master...jm-parenthesis-expect_raises) https://git.io/vdwtR
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<FromGitter>
<OldhamMade> interestingly, if I connect to the container and run the binary from there, it continues to fail sporadically. however, if i build and run the binary locally, it doesn't fail at all.
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<FromGitter>
<coderhs> Hey there. Is there any shards to generate pdf in Crystal. What to try porting code2pdf gem from Ruby to Crystal.
<FromGitter>
<straight-shoota> @coderhs Unfortunately no, it's still needed. See crystal-community/crystal-libraries-needed/issues/40
<FromGitter>
<straight-shoota> There is however a shard with bindings to libwkhtmltox so you could co through HTML as a workaround: blocknotes/wkhtmltopdf-crystal
<oprypin>
OldhamMade, yeah what aboout the other one
<FromGitter>
<OldhamMade> the rest is default from kemal
<FromGitter>
<OldhamMade> APP_PORT is also set in my Dockerfile to 8080
<FromGitter>
<OldhamMade> `ENV APP_PORT 8080`
<FromGitter>
<coderhs> Since I am used to using prawn from Ruby world @oprypin :-D
<oprypin>
coderhs, so you had an easy solution, doesnt mean that lib is simple
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<oprypin>
OldhamMade, my suspicion was either the port number is a string (apparently not) or the host name was specified as "http://0.0.0.0" not "0.0.0.0" (but apparently you're not specifying it at all)
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<FromGitter>
<coderhs> Ya. But installing whole of qt in a server just for generating PDF? I mean won't loading that library to memory be an overkill on its own. I mean I agree that it can be done with qt. But for a simple non gui or web application I don't see the value in having such a dependency. Of course just my opinion.
<FromGitter>
<OldhamMade> yeah; the fact that it's intermittent is really making it hard to track down. however, it's definitely something in `Kemal.run` as that's where it's pointing with `53:5`
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<oprypin>
imonmyown, ensure that `other` is not nil
<FromGitter>
<imonmyown> @oprypin, I thought it being a mandatory argument implies it's not nil... seems like I was wrong... ⏎ What's the idiomatic way to do that?
<FromGitter>
<straight-shoota> you could use `.not_nil!` but that's smelly and there's probably a better way, but depends on the context
<oprypin>
imonmyown, the idiomatic thing to point out is somewhere in the code you didnt show
<FromGitter>
<straight-shoota> question is: why can `other` be nil?
<FromGitter>
<imonmyown> @oprypin, yeah inheritance would probably be better
<oprypin>
imonmyown, why do you want to add the runtime check if the compiler already has a better compile time check for you -- just error out if this doesnt make sense
<oprypin>
Hellfire01, it just runs everything in spec folder when u run crystal spec
<oprypin>
Hellfire01, and dont forget to `require "spec"` because that's what contains all those weird thingies `describe` `should` etc
<FromGitter>
<Hellfire01> so, if i got it right, I just place all of my spec files in the spec folder and Crystal will test them one by one with the `Crystal spec` instruction ?
<FromGitter>
<Hellfire01> will it recurcively go in the sub-directories or must I show Crystal were to find them ?
<oprypin>
recursively
<FromGitter>
<Hellfire01> thanks
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<FromGitter>
<georgeu2000> Can I use this to compile my app for linux? ⏎ `crystal build your_program.cr --cross-compile --target "x86_64-unknown-linux-gnu"`
<FromGitter>
<georgeu2000> It is Alpine 3.4.
<FromGitter>
<jwaldrip> Hey guys, checking in again on the Crystal release... any word.
<FromGitter>
<jwaldrip> I am literally dying to get the YAML updates.
<FromGitter>
<georgeu2000> And how do I install `cc`?
<FromGitter>
<faustinoaq> I think you command should work ⏎ ⏎ In alpine you can install cc using `apk install clang` or `apk instal gcc`
<FromGitter>
<georgeu2000> I did install gcc, but get `cc: error: /usr/local/Cellar/crystal-lang/0.23.1/src/ext/libcrystal.a: No such file or directory`. Do I have to update the PATH or something?
<FromGitter>
<georgeu2000> Oh, I see. It's working: `-lpthread /usr/local/Cellar/crystal-lang/0.23.1/src/ext/libcrystal.a`
<FromGitter>
<georgeu2000> The command is for OSX, not unix.
<FromGitter>
<georgeu2000> Maybe it is easier to compile in Linux.
<FromGitter>
<georgeu2000> Without cross compiling.
<FromGitter>
<faustinoaq> Yeah, try compiling using an Alpine enviroment for development and then you can copy the binary to an Alpine dedicated to production