01:12 <kodo[m]> Is there a way to force a struct to return falsy?

01:12 <kodo[m]> if foo = Thing.something and if Error then falsy

01:14 <kodo[m]> rather than just turning a nil on failure. my pet peeve with that is you never know why operation failed if you just return nil

01:15 <FromGitter> <fridgerator> raise an error?

01:15 <FromGitter> <fridgerator> / exception

01:16 <kodo[m]> meh I'm not a fan of exception handling

01:16 <kodo[m]> heh

01:17 <kodo[m]> > A contrasting view on the safety of exception handling was given by C.A.R Hoare in 1980, describing the Ada programming language as having "...a plethora of features and notational conventions, many of them unnecessary and some of them, like exception handling, even dangerous. [...] Do not allow this language in its present state to be used in applications where reliability is critical[...]. The next rocket to go

01:17 <kodo[m]> astray as a result of a programming language error may not be an exploratory space rocket on a harmless trip to Venus: It may be a nuclear warhead exploding over one of our own cities." [14]

01:20 <kodo[m]> I tried doing something like `if foo = Something.thing && foo.class != Error` but it complains about using variable name inside assignment

01:21 <kodo[m]> I guess I can just put the assignment on the line above the conditional

01:22 <kodo[m]> would be cool to have some assignment/conditional paradigm though

01:24 <FromGitter> <samueleaton> I posted a question on SO :) https://stackoverflow.com/questions/43082641/is-an-objects-object-id-guaranteed-to-be-unique-and-unchanged-for-the-life-of-t

01:25 <FromGitter> <jwoertink> I have this C lib I'm trying to write a binding for. How would I write this in a crystal lib?

01:25 <FromGitter> <jwoertink> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=58db0d1fad849bcf422c1cb7]

01:26 <FromGitter> <jwoertink> actually, what I really care about is that `MIX_DEFAULT_FORMAT`. How I would access that from the lib

02:20 <Renich> Hey, How do I convert a Regex::MatchData to a string

02:23 <Renich> Ah, found it: try &.[1]

02:23 <Renich> pretty weird

02:30 <havenwood> Renich: "Crystal".match(/[p-s]/).not_nil![0] #=> "r"

02:36 <Renich> havenwood: ah, that's much better

02:38 <Renich> havenwood: I think you meant [1]

02:51 <Renich> I am getting a compile time error; I dunno why: https://gist.github.com/renich/35b33a557a3f73610a81f76b51e55590

03:06 <Renich> Here's the error with trace enabled: https://gist.github.com/renich/ea1e6b7c8b077d7b4777ed62c4ace9e4

03:21 <FromGitter> <jwoertink> How do I pass a String to a function that is looking for a `Char*`?

03:33 <FromGitter> <mjago> @jwoertink https://gist.github.com/mjago/e30b72ad160cee2e3f9f8c04dd5e4b00 should work?

03:33 <FromGitter> <jwoertink> hmm

03:34 <FromGitter> <jwoertink> I get an error mentioning that the c lib function is expecting a Pointer Char and not a String

03:35 <FromGitter> <jwoertink> ```code paste, see link```

03:38 <FromGitter> <mjago> Would need to see lib declaration

03:41 <FromGitter> <jwoertink> `fun load_wav = Mix_LoadWAV(file : Char*) : Chunk*`

03:42 <FromGitter> <mjago> ``````

03:43 <FromGitter> <jwoertink> ohhh... that might be it. I'll try

03:43 <FromGitter> <jwoertink> damn....

03:44 <FromGitter> <jwoertink> Well, I get a new error, so I guess that's good

03:44 <FromGitter> <mjago> he he

03:44 <FromGitter> <jwoertink> thanks!

03:45 <FromGitter> <mjago> @jwoertink you doing audio stuff? I’ve written a few audio bindings - libao, libsoundfile, libmpg123, libtaglib

03:46 <FromGitter> <jwoertink> I'm trying to get SDL2_Mixer in to sdl.cr

03:46 <FromGitter> <mjago> ah cool

03:48 <FromGitter> <jwoertink> Now I get `ld: symbol(s) not found for architecture x86_64` so I guess I'm missing something here

03:48 <FromGitter> <mjago> which symbol(s)

03:49 <FromGitter> <jwoertink> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=58db2eb5b52518ed4dba0a34]

03:51 <FromGitter> <mjago> have you @[Link(“mixer object file name")]

03:52 <FromGitter> <jwoertink> https://github.com/jwoertink/sdl.cr/blob/audio/src/lib_mixer.cr#L3

03:54 <FromGitter> <mjago> hmmm its not SDL_Mixer is it? (I’m not familiar with SDL)

03:55 <FromGitter> <jwoertink> SDL_Mixer is the 1.0 version. I have 2.0 installed through `brew install sdl2_mixer` which also requires a bunch of options for support with flac, mp3, etc...

03:57 <FromGitter> <mjago> might still use SDL_mixer for object file names - worth a try

03:57 <FromGitter> <mjago> *name

03:58 <FromGitter> <jwoertink> `ld: library not found for -lSDL_mixer`

03:58 <FromGitter> <mjago> k

03:58 <FromGitter> <jwoertink> hmm

04:01 <FromGitter> <jwoertink> Looks like the sample boots if I remove https://github.com/jwoertink/sdl.cr/blob/audio/samples/21_sound_and_effects.cr#L11

04:03 <FromGitter> <mjago> there are references to ```SDL::Mixer``` in there

04:03 <FromGitter> <jwoertink> yup. Everything else seems ok. It's just that one line that borks it

04:16 <kodo[m]> Is there a way to get line number for logger?

05:40 <crystal-gh> [crystal] bcardiff opened pull request #4208: Allow Iterator.stop to be used inside Iterator.of block (master...fix/iterator-of-stop) https://git.io/vS3JB

05:53 <kodo[m]> you

05:53 <kodo[m]> doh

05:53 <kodo[m]> damn enter key

05:53 <kodo[m]> you're welcome: https://github.com/crystal-lang/heroku-buildpack-crystal/pull/18/files

06:28 <jhass> so we can no longer pass nil in place of a null pointer?

06:33 <jhass> nvm something else is broken

12:44 <crystal-gh> [crystal] huacnlee opened pull request #4210: Add `HTTP::Client.put_form`, same as post_form. (master...feature/http-client-put-form) https://git.io/vS3Pb

12:57 <crystal-gh> [crystal] huacnlee closed pull request #4210: Add `HTTP::Client.put_form`, same as post_form. (master...feature/http-client-put-form) https://git.io/vS3Pb

14:12 <FromGitter> <azzuwan> Hi guys I get undefined reference to `SSL_library_init' when trying the http server example

14:12 <FromGitter> <azzuwan> How can I remedy that

14:15 <FromGitter> <sdogruyol> be sure to have libssl on your system

14:19 <FromGitter> <azzuwan> @sdogruyol I just verified that libssl is present.

14:20 <FromGitter> <azzuwan> Is there any compilation flag I need to use to explicitly tell the linker?

14:22 <FromGitter> <KCreate> What OS are you running?

14:23 <FromGitter> <azzuwan> It's Deepin Linux but it is really a Debian 8 underneath

14:27 <FromGitter> <KCreate> Could you post the complete output of the compiler?

14:36 <FromGitter> <azzuwan> (https://files.gitter.im/crystal-lang/crystal/hXql/DeepinScreenshot20170329223547.png)

14:39 <FromGitter> <fridgerator> do you have libssl-dev also?

14:40 <FromGitter> <KCreate> Leaving this here in case it's helping to resolve the issue: https://github.com/crystal-lang/crystal/wiki/All-required-libraries

14:40 <FromGitter> <fridgerator> yeah I usually end up installing all of those as well

14:41 <FromGitter> <azzuwan> (https://files.gitter.im/crystal-lang/crystal/lb8R/libssl-crystal.png)

14:42 <FromGitter> <azzuwan> apt-get tells me I have the latest version

14:43 <FromGitter> <azzuwan> Deepin faithfully follow debian directory structure

14:43 <FromGitter> <azzuwan> I'm going to find a real debian instance and try it on there

15:18 <FromGitter> <azzuwan> Okay it is working on on a fresh Debian 8 instance

15:18 <FromGitter> <azzuwan> The difference is in the libssl version

15:18 <FromGitter> <azzuwan> Debian 8 is using libssl1.0.0

15:18 <FromGitter> <azzuwan> Deepin is using libssl1.1.0

15:24 <BlaXpirit> azzuwan, well that's crazy, if even Arch has 1.0.2

15:26 <kodo[m]> multilib/lib32-openssl 1:1.0.2.k-1 [installed]

15:26 <kodo[m]> core/openssl 1.0.2.k-1 [installed] ... same diff

15:28 <kodo[m]> deepin y u so bleedin?

15:30 <kodo[m]> yeah arch has 1.1 but it's in testing repo

15:30 <FromGitter> <azzuwan> Hey guys interesting. I'm downgrading the libssl see if that works

15:31 <kodo[m]> if something is in arch testing u know it's unstable heh

15:31 <FromGitter> <azzuwan> <kodo[m]> deepin is bleedin indeed :D

15:36 <FromGitter> <azzuwan> <kodo[m]> You are right I have some unstable repo enabled. I have no idea. It must be one of the previous install scripts

15:37 <FromGitter> <azzuwan> I'm using libssl1.0.0 and it's working fine yeah

16:04 <adam12> Has anyone linked Lua into a Crystal project?

16:06 <adam12> All I've found is this which is mostly quiet. https://github.com/pine/crystal-lua

16:15 <crystal-gh> [crystal] bcardiff pushed 1 new commit to master: https://git.io/vSsc6

16:15 <crystal-gh> crystal/master 27e697d Brian J. Cardiff: Docs update Set#merge! to Set#concat. fixes #4211

16:59 <travis-ci> crystal-lang/crystal#27e697d (master - Docs update Set#merge! to Set#concat. fixes #4211): The build passed. https://travis-ci.org/crystal-lang/crystal/builds/216416362

17:00 <DeBot> https://github.com/crystal-lang/crystal/issues/4211 (undefined method 'merge!' for Set)

17:35 <FromGitter> <samueleaton> I'll just leave this here. 👍 ://stackoverflow.com/questions/43100378/how-to-modify-the-httpresponse-after-it-has-been-written-to

17:35 <FromGitter> <samueleaton> http

17:36 <FromGitter> <samueleaton> The link got messed up and I'm in mobile http://stackoverflow.com/questions/43100378/how-to-modify-the-httpresponse-after-it-has-been-written-to

17:40 <vegai_> do any of you develop on NixOS?

17:41 <vegai_> I'm swimming in this thing for the first time, and I'm a bit confused on how to make arbitrary projects (like Crystal) see all the libs Nix has hidden in non-fhs places

17:41 <FromGitter> <fridgerator> never heard of it

17:42 <FromGitter> <fridgerator> @samueleaton `HTTP::Server::Response#write` ?

17:42 <vegai_> it's a Linux with an .... interesting .... package manager

17:43 <FromGitter> <fridgerator> @vegai_ interesting

17:43 <vegai_> they have packaged crystal, though. I could just use that

17:44 <vegai_> would be fun to follow git master too, though

18:34 <bmcginty> vegai_: I think the -l and -L options with the --link-flags will do what you want. Using -L/path/containing/library _should? do it...

18:42 <FromGitter> <samueleaton> @fridgerator I want to modify the existing HTML content in the response body before it is sent to the client

18:43 <FromGitter> <samueleaton> Based on this kemal issue: https://github.com/kemalcr/kemal/issues/343

18:49 <FromGitter> <fridgerator> ah

19:49 <FromGitter> <crisward> @samueleaton I asked this a while ago, I wanted to write middleware which modified the output. However I was told that the output is write only because it's a pipe - so it would need to buffered to be modifiable and I believe it's streamed, though I could be wrong.

22:11 <FromGitter> <N0r1x> Hey hello, I'm trying to use the tcp socket standard library class and the << operator doesn't quite work like I think it would (i.e like the cout << thing in c++): I'm making a irc-client for fun and I get a response from the server if I use puts <String> but not with the << operator

22:12 <FromGitter> <N0r1x> Is this me being an idiot and not getting it (quite likely) or is there something wrong? If it's me being an idiot I could maybe add a more detailed doc

22:20 <FromGitter> <fridgerator> would help if I could, but i'm not familiar