<sorcus>
Can be useful for generation CloudFlare cookie.
<sorcus>
:-D
<sorcus>
If site behind Cloudflare and needed access to website from crystal's HTTP client :-D
<FromGitter>
<tenebrousedge> you're defining a `rotate` method. Why not use `Array#rotate` ?
<sorcus>
tenebrousedge: because i just rewrite similar functions from aes.js to crystal. :-D X-)
<sorcus>
tenebrousedge: fixed :-D Thanks.
<sorcus>
Now, sweet dreams everyone :-)
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<FromGitter>
<Daniel-Worrall> Trying to come up with an automated way to package an app with fpm, how can I dynamically list what the app depends on?
<FromGitter>
<Blacksmoke16> `ldd myapp`?
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<FromGitter>
<Daniel-Worrall> ty
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<FromGitter>
<grkek> Hello
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<FromGitter>
<s0kil> Are there any options or best practices to reduce compilation time? ⏎ I know `--no-debug`shaves off a few seconds, Is there any other options?
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<FromGitter>
<stnluu_twitter> use a utility (like fswatch on mac) to watch a folder and run the compile command whenever u save a file
<FromGitter>
<stnluu_twitter> saves you a few hundred milliseconds
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<FromGitter>
<Nicolab> what I like about *reflex*, it's the support *glob* and regex (by exclusion `-R` for regex and inclusion `-r` for regex, `-g` and `-G`for *glob* ). Also the flag `--start-service` for a long running process (like a server or a daemon)
<FromGitter>
<alehander92> sorcus ok :) not bad to learn, just keep yeah try to use something well checked in serious code
<FromGitter>
<alehander92> is the compilation slow
<FromGitter>
<alehander92> or the runtime
<FromGitter>
<tenebrousedge> compilation, but only in release mode
<sorcus>
alehander92: Compilation. At runtime it's very fast.
<FromGitter>
<alehander92> ah i see
<sorcus>
alehander92: AES 47.52k ( 21.04µs) (± 2.48%) 11.2kB/op fastest - this measured with crystal's benchmark.
<FromGitter>
<alehander92> hmm, but in debug mode ok?
<FromGitter>
<cyanidee> hey i have a question, im a beginner and i wanted to know if there is any way to see how macros expand? without actually compiling the code
<FromGitter>
<cyanidee> the generated code fails to compile and i wanna see why
<FromGitter>
<Blacksmoke16> there is a cli command to do it
<FromGitter>
<Blacksmoke16> or you can add `{{debug}}` to the end of your macro and try to run the code and it'll show the expanded macro
<sorcus>
alehander92: crystal build gmult_aes.cr 5.35s user 0.98s system 66% cpu 9.478 total - ~10 sec without release flag.
<FromGitter>
<cyanidee> ohhh so i can create a byte array at given address of given size?
<FromGitter>
<cyanidee> oh and turns out the error was just a matter of adding `()` around macro call 😅
<FromGitter>
<cyanidee> thanks @tenebrousedge for the `Slice` hint!
<FromGitter>
<tenebrousedge> you're welcome, hope it works for you
<FromGitter>
<grkek> Hello
<FromGitter>
<watzon> Hola @grkek
<FromGitter>
<Nicolab> Hello @grkek
<FromGitter>
<cyanidee> okay sorry to bother you guys again, but i have a quick question: can i use `self` to pass current object instance to some other method/function?
<FromGitter>
<watzon> @cyanidee as long as you're not doing it in the initializer
<FromGitter>
<tenebrousedge> yes. It's a little unusual
<FromGitter>
<cyanidee> okay thanks! im going to try it out
<FromGitter>
<grkek> How are you guys ?
<FromGitter>
<watzon> In Ruby you can do that anywhere, including the initializer, but Crystal doesn't allow you to because your object may not be finished initializing when it gets passed into another object
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<FromGitter>
<watzon> @grkek pretty well. Doing some reading up on Zig lang today
<FromGitter>
<grkek> Is there a function to override for that purpose like finished_init or something
<FromGitter>
<grkek> zig ?
<FromGitter>
<grkek> sounds weird
<FromGitter>
<watzon> Yet another newer language haha
<FromGitter>
<grkek> is it even half as good as crystal ?
<FromGitter>
<watzon> finished_init? Not that I know of. You can always call a function at the end of your initializer.
<FromGitter>
<watzon> Well zig is barely half as old as Crystal, and will never have it's syntax. Faster though.
<FromGitter>
<grkek> Is it faster ?
<FromGitter>
<watzon> It's actually faster than C apparently, and also can be used as a C compiler. It came out in 2017 though, and still has a long way to go before it's mature. Syntax changes are still happening all the time.
<FromGitter>
<grkek> oh damn it looks like it has a c-ish syntax
<FromGitter>
<watzon> And no package manager yet
<FromGitter>
<grkek> It is faster than C how ?
<FromGitter>
<grkek> does it do better optimizations via assembly than the GCC compiler ?
<FromGitter>
<grkek> no way
<FromGitter>
<watzon> Yeah it's got a similar syntax to C. More powerful out of the box though, or so it seems to me.
<FromGitter>
<watzon> It's definitely possible to be faster than C. It wouldn't be the only one.
<FromGitter>
<watzon> I haven't gotten to test the "faster than C" claim myself yet. Benchmarks pending.
<FromGitter>
<grkek> I want to try the language now
<FromGitter>
<grkek> damn
<FromGitter>
<grkek> i like the shorthand declaration of types
<FromGitter>
<grkek> and keywords seem cute as well
<FromGitter>
<watzon> It could just be "faster" because it's easier to write performant code in Zig than it is in C, seeing as C is so old and clunky.
<FromGitter>
<watzon> /shrug
<FromGitter>
<grkek> /double-shrug
<FromGitter>
<watzon> Unfortunately the don't have a regex implementation working yet, but I think that will be coming soon
<FromGitter>
<watzon> As a toy project I'm going to work on writing a StringScanner implementation for Zig like I did for nodejs yesterday, should be a fun introduction to the language
<FromGitter>
<watzon> But without regex I can only scan char by chat
<FromGitter>
<grkek> Well I can say the language looks disgusting
<FromGitter>
<grkek> a bit
<FromGitter>
<grkek> larger codebase makes it look sad
<FromGitter>
<grkek> anything else than zig ?
<FromGitter>
<grkek> I know nim
<FromGitter>
<watzon> Yeah it's definitely still very new. They're working on a self-hosted compiler right now.
<FromGitter>
<grkek> I loved it and then I found crystal
<FromGitter>
<watzon> The main ones I know of are Crystal, Nim, and Zig
<FromGitter>
<watzon> Zig I just barely learned about
<FromGitter>
<grkek> crystal is the best one so far
<FromGitter>
<watzon> Julia is a good one as well
<FromGitter>
<grkek> So it is on llvm as well
<FromGitter>
<watzon> Yeah, although it seems as though they have the goal of eventually removing LLVM, at least for some cases
<FromGitter>
<watzon> I watched on of the creator's live streams where he said he eventually hopes to create his own assebmler
<FromGitter>
<tenebrousedge> it's slightly more typical to call methods defined on `self` than to pass `self`. So presumably there's a good reason for doing the latter
<FromGitter>
<rishavs> It went really big on HN this week and is made by the co-founder of popcap games
<FromGitter>
<watzon> > The syntax and many semantics are most directly derived from C# ⏎ ⏎ Well I'm out
<FromGitter>
<rishavs> same boat. Love the idea behind the language. But I really dislike the verbosity of c#
<FromGitter>
<watzon> Yeah same. I just can't, especially when there are so many other choices.
<FromGitter>
<watzon> Good editor support is nice, but I can deal
<FromGitter>
<rishavs> There is also https://vlang.io/. Pretty young and the author is known to make big claims but folks are pretty hyped about it
<FromGitter>
<rishavs> we are pretty much in the golden age of languages right now
<FromGitter>
<watzon> I can't with Vlang either. The creator somehow expects the community to thrive in a box. He bans people from the communities and github just for criticizing the language and having a difference of opinion and he is the *only* core maintainer.
<FromGitter>
<watzon> It showed promise, but he'd have to give up control before I'd be willing to really give it a fair shake again
<FromGitter>
<grkek> now, now C# is nice
<FromGitter>
<grkek> why would you insult it
<FromGitter>
<watzon> There are definitely a lot of good languages coming out though. I blame LLVM for making it so easy.
<FromGitter>
<grkek> true LLVM is like the open gate for everyone to make a programming language
<FromGitter>
<rishavs> c# is nice but I prefer smaller languages.. C# is too verbose and has way too many features
<FromGitter>
<watzon> C# is unnecessarily verbose and still has shit support on Linux, even though Microsoft open sourced dotnet years ago.
<FromGitter>
<grkek> C# was my first language tho
<FromGitter>
<rishavs> :)
<FromGitter>
<watzon> PHP was mine, and I hate it lol
<FromGitter>
<grkek> then I moved to C, C++
<FromGitter>
<grkek> I hate php so much
<FromGitter>
<grkek> oh my god
<FromGitter>
<grkek> I hate it
<FromGitter>
<watzon> PHP is one of the worst
<FromGitter>
<rishavs> I really want to love f#. it seems to have everything that i want. but i just suck with func languages
<FromGitter>
<kinxer> My first language was TI-BASIC. Like with PHP, anything else is an improvement.
<FromGitter>
<watzon> My problem with F# is one of my same problems with C#. Microsoft.
<FromGitter>
<watzon> They're just not good at languages
<FromGitter>
<watzon> Look at VB
<FromGitter>
<watzon> Ahhh all the BASIC variations
<FromGitter>
<rishavs> qBasic was my 1st as well
<FromGitter>
<rishavs> that and LOGO
<FromGitter>
<grkek> the VB
<FromGitter>
<grkek> is so bad
<FromGitter>
<grkek> its just
<FromGitter>
<grkek> worse than php
<FromGitter>
<grkek> VB*
<FromGitter>
<grkek> not the VB ;d
<FromGitter>
<watzon> Lol
<FromGitter>
<watzon> I hate PHP and Java almost equally
<FromGitter>
<grkek> I really like Elixir
<FromGitter>
<grkek> comfy af
<FromGitter>
<watzon> Elixir is nice, I just can't wrap my head around the model they use. Very different from what I'm use to.
<FromGitter>
<watzon> Same with Pony
<FromGitter>
<watzon> That's another good newer language btw
<FromGitter>
<grkek> True
<FromGitter>
<grkek> I loved pony
<FromGitter>
<grkek> a lot
<FromGitter>
<grkek> but couldn't get myself up to learn it
<FromGitter>
<rishavs> I like elixir too, but hate the fact that you cant use it for anything other than webdev
<oprypin>
when/after running specs, is there a way to find out programmatically how many failed? i guess one way would be to read junit-style test results, any quick pointers on that?
<FromGitter>
<watzon> Well elixir definitely can be used for stuff besides web dev, but it's not much of a systems language I'll say that for it
<FromGitter>
<watzon> It's good for protocol implementations, telecom, web dev, etc
<FromGitter>
<watzon> Stuff where you need to send data from point A to point B and you want to do it in a concurrent, distributed, fail-safe manner
<FromGitter>
<grkek> Crystal still beats it
<FromGitter>
<straight-shoota> oprypin, tap formatter could be an option as well. It doesn't print a summary currently, but it prints one line for every example and you could simply count the lines starting with "not ok"
<FromGitter>
<grkek> Are there any advanced books to learn crystal form ?
<FromGitter>
<grkek> from*
<FromGitter>
<watzon> Agreed, at least in most cases. I'd much rather use Lucky for webdev myself.
<FromGitter>
<watzon> No advanced books yet afaik. I do think someone is writing a book, but I'd have to go looking.
<FromGitter>
<grkek> Have you looked at uhh my framework @watzon
<FromGitter>
<grkek> not the case for microsoft but
<FromGitter>
<grkek> you get the image
<FromGitter>
<straight-shoota> oprypin alternatively you can just hook into `spec` in a helper and add a custom formatter that prints the results on the last line. See `Spec.add_formatter`
<FromGitter>
<grkek> I am so glad I joined this gitter I've learned so much :D
<FromGitter>
<Blacksmoke16> (needs to be updated for some changes in that PR tho)
<FromGitter>
<Blacksmoke16> but that gives you a good overview (from the viewpoint of my di shard)
<FromGitter>
<watzon> Honesly one thing I can say for Crystal: best community by far
<FromGitter>
<grkek> true, people are just happy for it
<FromGitter>
<grkek> happy for eachother etc
<FromGitter>
<Blacksmoke16> tl;dr DI abstracts the instantiation of objects into a single location that handles providing those objects where they are needed. Works best if you base your code on interfaces versus concrete types
<FromGitter>
<watzon> Pretty languages tend to make people happy 😊
<FromGitter>
<grkek> Python community is just OOH USE LIST COMPREHENSIONS
<oprypin>
excuuuuse me
<FromGitter>
<grkek> its slow because you're just not doing it right
<FromGitter>
<grkek> > Language bashing
<FromGitter>
<grkek> > Not fun but okay
<FromGitter>
<j8r> then they become list incomprehensions
<FromGitter>
<grkek> @j8r this guy gets it
<FromGitter>
<j8r> haha 😄
<FromGitter>
<grkek> What type of music do you people listen to ?
<FromGitter>
<tenebrousedge> atmospheric noise
<oprypin>
it's very tempting to reply but it's certainly off topic
<FromGitter>
<j8r> that's like interference noise?
<FromGitter>
<tenebrousedge> more random, I think
<FromGitter>
<grkek> @tenebrousedge I listened to harsh noise and made me lose hearing in my left ear
<FromGitter>
<j8r> usually when asking this question, it should have a random dude replying with a list of dozen of exotic music types
<FromGitter>
<grkek> I respect mongolian empire a lot
<FromGitter>
<j8r> @watzon what do you think of it? I would like to see how it compares with the LXD REST API, which I am writing a shard
<FromGitter>
<j8r> I have used it once, and it found it meh
<FromGitter>
<watzon> Honestly I haven't touched it in a while and don't really know anything about the LXD API. I don't remember liking it much though.
<FromGitter>
<j8r> there is rest api, or it's through socket?
<FromGitter>
<grkek> > Youtube recommends php talks now
<FromGitter>
<grkek> gitter is a google spy
<FromGitter>
<watzon> Oof lol
<FromGitter>
<grkek> Google is basically everywhere at this point
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<oprypin>
😬
<FromGitter>
<watzon> Big brother is watching
<FromGitter>
<grkek> Everytime everywhere
<FromGitter>
<grkek> they are sitting in the corner glowing
<FromGitter>
<grkek> you cant see them
<FromGitter>
<grkek> but they are there
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<FromGitter>
<sudomaxime> Hey guys, just discovered crystal, I think it's awesome ! Is there any use case of people using it in production for web services ?
<FromGitter>
<Blacksmoke16> can search for `(breaking-change)`
<FromGitter>
<Blacksmoke16> granted it's mostly API changes, nothing super super major that iv've seen so far
<FromGitter>
<sudomaxime> Right !
<FromGitter>
<Blacksmoke16> if you pay attention to upcoming releases, run your spec suite against nightly, and pay attention to warnings you should be fine
<FromGitter>
<sudomaxime> We're building a content distribution service and we need to build small contained proxies for our clients to consume our API, we've been playing with Rust because speed / memory is a huge issue, Crystal is much more productive than Rust
<FromGitter>
<sudomaxime> I guess we will give it a shot :) !
<FromGitter>
<Blacksmoke16> 👍 sounds like a plan
<FromGitter>
<watzon> @sudomaxime welcome to the community
<FromGitter>
<watzon> Definitely reach out if you need any help getting started
<FromGitter>
<sudomaxime> Thanks so much !
<FromGitter>
<grkek> Welcome, would you mind taking a look at my framework ? @sudomaxime
<FromGitter>
<grkek> > Shilling intensifies
<FromGitter>
<sudomaxime> Yeah sure pass it along !
<FromGitter>
<grkek> it has its own type of a thing
<FromGitter>
<Blacksmoke16> in how you define routes and stuff it kinda is
<FromGitter>
<grkek> hmmmm kemal is but mine is like
<FromGitter>
<grkek> class a ⏎ route "/" ⏎ end
<FromGitter>
<Blacksmoke16> true true
<FromGitter>
<grkek> its more of a mix of class oriented
<FromGitter>
<grkek> and sinatra liek
<FromGitter>
<grkek> like*
<FromGitter>
<sudomaxime> The implementation is not a big issue for me, just the lightness, I rather bring tools together to build what I need than using frameworks
<FromGitter>
<grkek> Try and have fun with crystal
<FromGitter>
<grkek> happy crystaling
<FromGitter>
<Blacksmoke16> depends on the architecture/style you're used to
<FromGitter>
<Blacksmoke16> each has their pros/cons
<FromGitter>
<sudomaxime> Yeah ! we'll get used with the language first and then see what brings us joy, Marie Kondo style :D
<FromGitter>
<Blacksmoke16> 👍
<FromGitter>
<grkek> Good luck with it !
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<FromGitter>
<watzon> Crystal definitely sparks joy as a language, I'm sure you'll find a solution you love
<FromGitter>
<watzon> I've needed it a number of times, but I've always had to dig in to what the pack expression was actually doing and figure out how to replicate it in Crystal
<FromGitter>
<watzon> Usually not fun
<FromGitter>
<jwoertink> Is there a reason it's not in, or just that it was never added? I'm wondering if I should open an issue about it
<sorcus>
Looks like array allocated on line 63903... Maybe...
<sorcus>
Oh, this is so hard for me :-D :-D :-D
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<FromGitter>
<jwoertink> If there's a bug in the `play.crystal-lang` site, are those reported to the main repo, or is there a different repo that goes to?
<FromGitter>
<straight-shoota> @jwoertink Yeah, I get the code in Chrome as well. It's probably caused by the program writing a null byte to it's stdout
<FromGitter>
<jwoertink> I made an issue on carc.in
<FromGitter>
<straight-shoota> No, Crystal performs exactly as expected. Carc.in seems not to be able to cope with that.
<FromGitter>
<jwoertink> 👍
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<FromGitter>
<Nicolab> @sudomaxime Welcome! Me too I started Crystal a week ago (to start 2020 well!). ⏎ ⏎ I’ve been looking some thing like Express (JS), Echo / Gin (Go) or Actix (Rust). I chose Kemal to add what I need as I go along. ⏎ ⏎ It’s an exploration. When everything is good (learning curve), go to the prod. ... [https://gitter.im/crystal-lang/crystal?at=5e1904e9b990d50d818fd33a]
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<FromGitter>
<jwoertink> Anyone know what Crystal's version of Javascript's `>>> (Zero-fill right shift)` bitwise operator would be?
<FromGitter>
<tenebrousedge> `>>` I think?
<FromGitter>
<jwoertink> That's what I thought too, but not quite
<FromGitter>
<jwoertink> Crystals `>>` matches up with the JS `>>`, but I need the top one
<FromGitter>
<tenebrousedge> `-1_i16 >> 7 #=> -1`
<FromGitter>
<jwoertink> exactly.
<FromGitter>
<jwoertink> Yeah, I don't see a way to do it
<FromGitter>
<watzon> I've been there haha. Can't actually remember what I had to do.
<FromGitter>
<watzon> Basically the `>>>` operator preserves the first bit, which is used to mark the number as positive or negative, whereas the `>>` operator will shift the bits regardless of the first bit's value
<FromGitter>
<watzon> I remember finding somewhere how to do it in ruby, and then just made it work in Crystal. I can't remember what project that was for though, or if it was even one I ended up pushing.
<FromGitter>
<jwoertink> Yeah, I'm digging through ruby forum stuff now