06:26 <FromGitter> <sam0x17> hey so I have an abstract class with an abstract method signature like `abstract def each_file(&block)` is there a way I can have it specify that the block has to yield a string? I'm guessing some sort of proc syntax but I always get fuzzy on the difference between blocks and procs

10:53 <FromGitter> <maattdd> hi :) The postgres driver (crystal-pg) mentions supporting array types but the README shows only reading array value from the DB. Does it support passing an Array as an arg to db.query ?

11:07 <FromGitter> <naqvis> @sam0x17 `abstract def each_file(&block: -> String)`

11:10 <FromGitter> <naqvis> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=5e6a18bee203784a55a20aa0]

12:59 <FromGitter> <Blacksmoke16> would more so be `& : String -> _`

12:59 <FromGitter> <Blacksmoke16> assuming he wants to *yield* a string, versus have the return value of the block be a string

13:00 <FromGitter> <Blacksmoke16> also id use `&`, to indicate the method can yield but the block cant be captured

13:10 <FromGitter> <naqvis> yeah, my understanding of question "....block has to yield a string...." was that its being asked on how to enforce type checking on return type of block.

13:10 <FromGitter> <naqvis> But its good to have answer to both questions

15:26 <sorcus> Hi :-)

15:27 <FromGitter> <Blacksmoke16> o/

15:27 <sorcus> https://gist.github.com/MrSorcus/154e47c3b347c461e09a3339db4878f6 - how can i rewrite this? :-D

15:28 <FromGitter> <Blacksmoke16> convert a string to hex?

15:28 <sorcus> It looks like a little weird X-)

15:30 <travis-ci> crystal-lang/crystal#14df86e (master - Use CRYSTAL_OPTS env variable as default compiler options (#8900)): The build passed. https://travis-ci.org/crystal-lang/crystal/builds/661564157

15:30 <DeBot> https://github.com/crystal-lang/crystal/pull/8900 (Use CRYSTAL_OPTS env variable as default compiler options)

15:30 <sorcus> Blacksmoke16: I'm not sure. Because main logic is `use first byte and make `exclusive or` with all other`. %-)

15:34 <sorcus> Blacksmoke16: Oh...

15:34 <sorcus> Blacksmoke16: https://gist.github.com/MrSorcus/f47c19038e8d0ea12cc2e0988f8fbd03 - here is how it should be.

15:35 <FromGitter> <stronny> so what's wrong with your code? why do you want to rewrite it?

15:36 <sorcus> stronny: because i'm not sure about my code...

15:38 <FromGitter> <stronny> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=5e6a57678e42396957845d88]

15:38 <FromGitter> <Blacksmoke16> `String.new(str.hexbytes)`

15:39 <FromGitter> <Blacksmoke16> assuming the hex string is correctly encoded ofc

15:39 <FromGitter> <stronny> you need to XOR each byte with the first one

15:40 <sorcus> Blacksmoke16: Nope, `String.new` doesn't return valid result.

15:40 <sorcus> stronny: Yeap X-)

16:11 <sorcus> https://gist.github.com/MrSorcus/154e47c3b347c461e09a3339db4878f6 - i rewrite it. I think it looks more better now.

16:12 <sorcus> > convert_old 329.25k ( 3.04µs) (± 3.78%) 802B/op 3.47× slower\nconvert_new 1.14M (875.84ns) (± 4.81%) 112B/op fastest

16:13 <sorcus> Hmmm. `\n` doesn't work here. Sad :-(

17:12 <travis-ci> crystal-lang/crystal#c6718ce (master - Revert "Deprecate String#codepoint_at (#8475)" (#8902)): The build passed. https://travis-ci.org/crystal-lang/crystal/builds/661605286

17:12 <DeBot> https://github.com/crystal-lang/crystal/pull/8475 (Deprecate String#codepoint_at) | https://github.com/crystal-lang/crystal/pull/8902 (Revert "Deprecate String#codepoint_at")

18:27 <FromGitter> <watzon> Seems like `LibC` is missing the `LongDouble` type

18:27 <FromGitter> <watzon> It it maybe because `long double` is too big?

18:34 <FromGitter> <watzon> Also, fuck: ⏎ ⏎ ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=5e6a80a285f81e18a801190e]

18:39 <FromGitter> <Blacksmoke16> f

18:40 <FromGitter> <watzon> How the fuck am I gonna make this work? Lol

18:44 <FromGitter> <Blacksmoke16> :shrug:

18:55 <FromGitter> <watzon> There has to be a better way to get a `Pointer(Pointer(UInt8))` than this, right? ⏎ ⏎ ```argv = "".to_slice.to_unsafe ⏎ pointerof(argv)```` [https://gitter.im/crystal-lang/crystal?at=5e6a85aeff8bf14a5451ac5f]

19:14 <FromGitter> <watzon> Also, is it possible to get a function pointer? Or do procs have to be used?

19:21 <FromGitter> <Blacksmoke16> thats what a proc is