12:17 <FromGitter> <djberg96> Does something like this already exist in core?

12:33 <FromGitter> <naqvis> don't believe stdlib have one

12:45 <FromGitter> <djberg96> ok, thanks

12:48 <FromGitter> <djberg96> and if there's a nicer way to do what I'm doing there, I'm all ears

13:04 <FromGitter> <naqvis> all good, few suggestions ⏎ ⏎ 1) you can follow stdlib api style for params i.e accept `file` as `Path | String`, accept `encoding` etc params ⏎ 2) you can use `open` with block so you don't have to deal with closing file while you are done with reading [https://gitter.im/crystal-lang/crystal?at=63820ef5f9491f62c9cf700a]

13:05 <FromGitter> <naqvis> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=63820f1d25ca105c88d37310]

13:06 <FromGitter> <djberg96> Excellent, thanks!

13:06 <FromGitter> <naqvis> 🌹

13:07 <FromGitter> <djberg96> Just curious, why Int32 over Number?

13:09 <FromGitter> <naqvis> `Int32` is the default type, but sure you can expand param type to more broader type like `Int` or `Number`

13:09 <FromGitter> <naqvis> though I doubt `Number` will work, as `Number` includes floating points as well

13:10 <FromGitter> <naqvis> while `Bytes` size is restricted to `Int`

13:11 <FromGitter> <naqvis> so you can restrict `nbytes` to `Int` instead, to allow other integer types

13:11 <FromGitter> <naqvis> ```code paste, see link```

13:12 <FromGitter> <naqvis> will make it accept any of the signed/unsigned integer types

13:30 <FromGitter> <djberg96> fantastic, thank you

17:30 <FromGitter> <azurelmao> Is it possible to call the initialize method of the inherited class in crystal?

17:30 <FromGitter> <azurelmao> like in java you would do super(params)

17:31 <FromGitter> <Blacksmoke16> https://crystal-lang.org/reference/1.6/syntax_and_semantics/inheritance.html#super

17:33 <FromGitter> <azurelmao> I see

17:33 <FromGitter> <Blacksmoke16> so yes, should work just like java

21:06 <FromGitter> <djberg96> What's the equivalent of `"\xBA\xB4\u0000\u0000".unpack('i').first` in Crystal?

21:06 <FromGitter> <djberg96> I'm poking around the String class, but just not seeing it I guess

21:07 <FromGitter> <djberg96> (use case: i'm reading magic numbers out of image files)

21:14 <FromGitter> <Blacksmoke16> what kind of image?

21:20 <FromGitter> <Blacksmoke16> but it would be something with IO, where you do something like `io.read_bytes(Int32)` or `io.read_bytes Int32, IO::ByteFormat::BigEndian` depending on the type/endianess you want to read

21:20 <FromGitter> <Blacksmoke16> https://athenaframework.org/ImageSize/Image/#Athena::ImageSize::Image may be helpful

21:43 <FromGitter> <djberg96> In this particular case, bitmaps. First 2 bytes should be "BM", next 4 are the file size.

21:45 <FromGitter> <djberg96> so i'm just validating that those 4 bytes line up with the actual file size

21:49 <FromGitter> <Blacksmoke16> could do something like: ⏎ ⏎ ```code paste, see link``` ⏎ ⏎ think that should work [https://gitter.im/crystal-lang/crystal?at=638289d52cb657024046089d]

22:02 <FromGitter> <djberg96> Yep, got something like that using the block above from @naqvis, byte slice like `Bytes[66, 77, 186, 180, 0, 0]`. First 2 bytes are "BM", now i just need to conver the last 4 to an number.

22:03 <FromGitter> <Blacksmoke16> dont even really need that method, can just open the file and call methods on the io and call it a day

22:05 <FromGitter> <Blacksmoke16> just tried it: ⏎ ⏎ ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=63828daa473cf96648038713]

22:10 <FromGitter> <djberg96> well, i'm trying to use that method as a general solution, because I'm also reading magic values for other formats, like jpg, png, etc

22:12 <FromGitter> <djberg96> so, just for the sake of argument, how would I convert a byte slice like `Bytes[186,180,0,0]` to an int?

22:14 <FromGitter> <Blacksmoke16> first way that comes to mind is like `IO::Memory.new(bytes, writeable: false).read_bytes Int32`

22:14 <FromGitter> <Blacksmoke16> wait

22:15 <FromGitter> <Blacksmoke16> `IO::ByteFormat::LittleEndian.decode Int32, bytes`

22:16 <FromGitter> <Blacksmoke16> using the correct endianness of whatever format you're parsng

22:25 <FromGitter> <djberg96> that works, thanks!

22:28 <FromGitter> <Blacksmoke16> 👍

23:09 <FromGitter> <stellarpower> Looks like Complex doesn't have a method to raise it to a power. Am I missing something?

23:28 <FromGitter> <stellarpower> https://github.com/crystal-lang/crystal/issues/10005

23:28 <FromGitter> <stellarpower> Github is getting worse, I sweat. Finally found it anyway

23:41 <FromGitter> <stellarpower> *Github search