<FromGitter>
<paulcsmith> Is there a way to get at the `ENV` from inside a macro? `{{ ENV["something"] }}`. I swear I saw some code that did that, but now I can't seem to find it
<FromGitter>
<johnjansen> @papierkorb thanks for the nudge, all read up and things are flying 😄
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<isavegas>
Is there an rss feed for the blog?
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<FromGitter>
<johnjansen> i get the feeling something is a little off with benchmark ⏎ ⏎ ``` code paste, see link``` ⏎ ⏎ the second thing seems to be consistently slower than the first … even though its actually the same code [https://gitter.im/crystal-lang/crystal?at=5965918bbc46472974de5c95]
<FromGitter>
<johnjansen> in this example ive flipped the order of the `report`s in the benchmark block
<FromGitter>
<andrewhamon> I short while ago I asked if anyone knew of any easy to use libs for encrypting messages
<bmcginty>
johnjansen: Interesting. So stat dereferences? symbolic links with the stat call. Now my brain is getting all stupid and can't figure out if there's some better way to handle this, though if there's a symbolic? call in Stat, the only write thing would be to use lstat there...
<FromGitter>
<johnjansen> `lstat` was the answer, although it appears inconsistent
<FromGitter>
<johnjansen> i mean lstat is not inconsistent, but all those *should* do the same thing, i would have thought, since they all appear to be equivalent on the surfae
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<crystal-gh>
[crystal] bmmcginty opened pull request #4705: [bugfix] insure proper handling of multiple Content-Length headers in http (master...fix_content_length) https://git.io/vQDpi
<FromGitter>
<sdogruyol> @codenoid you're running out of connections in your db pool. Are you sure your DB pool config is proper?
<FromGitter>
<codenoid> @sdogruyol How to check it? , Mysql
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<FromGitter>
<sdogruyol> you can use MySQLWorkbench to profile and see your connections i guess
<FromGitter>
<sdogruyol> I'm not a MySQL user, i prefer Postgres
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<FromGitter>
<konovod> @andrewhamon i have monocypher bindings https://github.com/konovod/monocypher but libsodium is perhaps better for general use
<FromGitter>
<sdogruyol> haven't used monocypher before
<FromGitter>
<sdogruyol> is there any advantages?
<FromGitter>
<konovod> Small, no dependencies, it was written to be auditable. One-man project, so fine for my hobby-projects but i'm not sure about using it in "serious business".
<FromGitter>
<sdogruyol> oh okay
<FromGitter>
<sdogruyol> thanks for the info @konovod
<FromGitter>
<sdogruyol> actually arcage is using that library for sending out system notifications
<FromGitter>
<sdogruyol> kind of battle-tested
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<FromGitter>
<sdogruyol> It's in pure Crystal with no dependency, which is awesome
<FromGitter>
<crisward> I've got a library the wraps sendgrid and mailgun in a common api. I was going to look at writing an smtp driver for it. I'll probably wrap arcage's lib instead. It's quite nice to have the same api and just be able to swap out the engine (eg nodemailer style)
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<FromGitter>
<pglombardo> Hi all - I could use some advice/tips. How can I best implement this pattern in Crystal? Where a Student object optionally has a teacher object and I conditionally want to call on that teacher object: https://play.crystal-lang.org/#/r/2cg1
<FromGitter>
<pglombardo> I understand *why* it doesn’t work in crystal but not sure how to best write this in Crystal.
<FromGitter>
<bew> you need to store the teacher in a variable
<FromGitter>
<bew> otherwise the `student.teacher` call could change between the two invocations
<FromGitter>
<pglombardo> ah that’s slick - so you bypass the single runtime type of student.teacher
<FromGitter>
<pglombardo> Thanks I’ll try that
<FromGitter>
<pglombardo> And didn’t realize I left child/father in there - was trying to find the best model to describe the problem of accessing a single optional “parent” or “teacher"
<FromGitter>
<bararchy> Work: "We need an interface for vmware VIX so we can control guest and host machines" ⏎ Me: "Ok, what are the lib languge?" ⏎ Work: "C, C#, Perl" ⏎ Me: "Ok.... I'm binding with Crystal to the C lib and will give you a Crystal bin CLI util" ⏎ Work: "Ok" ... [https://gitter.im/crystal-lang/crystal?at=5966012ac101bc4e3a78e8a6]
<FromGitter>
<bararchy> Long stroy short, by Work is paying me to create an OpenSource API for VMware machine control in Crystal XD
<FromGitter>
<bew> so cooool :D
<FromGitter>
<bew> note: in the readme you mis-spelled SDK I think
<FromGitter>
<bararchy> XD true
<FromGitter>
<bararchy> fixing XD
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<FromGitter>
<sdogruyol> wow, amazing @bararchy
<FromGitter>
<bararchy> If it will be good enough Maybe VMware will consider adding it to the supported lang list :)
<FromGitter>
<krypton97> Why is most of the standard lib build on classes? Wasn't better to start with a struct and create different method for that so the heap could be as free as possible?
<Groogy>
because structs are copied by value and it wouldn't fit with expected behaviour on some of the structures?
<Groogy>
like let's say if arrays and strings were done per value?
<FromGitter>
<krypton97> that
<FromGitter>
<krypton97> I mean those are 2 cases, but the rest?
<FromGitter>
<krypton97> Also allocating on the heap is much slower that the stack and puts pressure on the gc
<FromGitter>
<mverzilli> @krypton97 in some cases it might be historical reasons
<FromGitter>
<mverzilli> as in "we implemented it and it works, and we never found a bottleneck there, and nobody sent a PR proposing moving it to a struct and explaining why it makes sense"
<FromGitter>
<krypton97> sounds legit
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<FromGitter>
<fridgerator> @sdogruyol I just used it yesterday as well! It actually didn't support `AUTH LOGIN` the day before, but @arcage put out a new veresion overnight!
<FromGitter>
<fridgerator> I had to send an email through an outlook server from my crystal / kemal app, and without that fix I was going to have to use lambda with node or some other solution
<FromGitter>
<sdogruyol> Yeo
<FromGitter>
<sdogruyol> Glad to hear that
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<FromGitter>
<krypton97> hey, any officail-ish authentication in crystal like devise or passport js?
<FromGitter>
<codenoid> is anybody have crystal T-Shirt design ?
<FromGitter>
<codenoid> like your shirt @sdogruyol 😆 , it's really cool
<hightower2>
Hey, I realize I need to serialize my object in a way that's not per-field. In other words, I want to serialize e.g. @one, @two, @three not as one: ..., two: ..., three: ..., but as a single string like "one/two/three". Does YAML.mapping() have some support for this or I am best of reimplementing to_yaml?
<hightower2>
Oh I see, basically if that's what I need, I just need to insert some phony field in YAML.mapping() and define its converter, which in reality will be reading/writing from/to multiple instance vars
<Papierkorb>
hightower2: Custom #to_yaml it is - Or, if you insist on having it outside, you can use a Converter module for that from where you're including it in another YAML.mapping()
<hightower2>
right
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<FromGitter>
<pglombardo> I can’t find a confirming explanation to this declaration syntax in the docs. What does the `?` indicate? `@message : String? = nil`
<FromGitter>
<pglombardo> Is that short hand for `String | Nil`?
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<FromGitter>
<pglombardo> That’s a nice for brevity if so
<Papierkorb>
that's what it is
<RX14>
it's weird
<RX14>
i think half the contents of the crysatal book is goner
<FromGitter>
<straight-shoota> I've just hacked together a simple Crystal app that serves a Jekyll site dynamically and is about as fast as serving the generated site :D
<FromGitter>
<johnjansen> nice work @straight-shoota
<FromGitter>
<straight-shoota> thanks. I was just tired of waiting for Jekyll to regenerate :D
<FromGitter>
<fridgerator> @straight-shoota thats great, jekyll is soooooo slooooooow
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<FromGitter>
<renich> @straight-shoota cool, I use Jekyll. What's the name of the app?
<FromGitter>
<renich> @hugoabonizio hey man, I got one for ya. Let's say I have 5 schedules running concurrently: A..E. What if I need C to wait for A and B to finish before running and, E needs to wait for C?
<FromGitter>
<hugoabonizio> @renich Hi! I think this kind of synchronization is the perfect task for channels, you should try it, the schedule shard is out of this scope and can be used in parallel with channels
<FromGitter>
<renich> @hugoabonizio thanks. I will study @johnjansen 's example and see if I can come up with an implementation later on
<FromGitter>
<hugoabonizio> 👍
<FromGitter>
<renich> @johnjansen it's pretty clear, man. Basically, you signal completion with ch and ci. Pretty cool.
<oprypin>
i've been trying to think about something universal and awesome for that task dependency thing but failed
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<FromGitter>
<sdogruyol> that's an ongoing global problem :P @oprypin
<oprypin>
Channel having 0 documentation doesnt help
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<FromGitter>
<drosehn> [earlier] The crystal-vix project looks very interesting.
<FromGitter>
<johnjansen> dont google `crystal-vix` in an office environment
<FromGitter>
<johnjansen> just an FYI
<oprypin>
D:
<FromGitter>
<faultyserver> Quick question: I have objects that define `to_json`. How do I use those in a `JSON.build`?
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<FromGitter>
<faultyserver> Doing `json.field :thing, object_that_defines_to_json` doesn't work, because the `JSON::Builder` tries to `scalar` only supports a strict set of types
<FromGitter>
<bew> Nice micro task system oprypin!
<FromGitter>
<faultyserver> I'm just trying to build up a JSON object from an array of Runner objects
<oprypin>
faultyserver, and why did you choose JSON.build for that?
<FromGitter>
<johnjansen> @oprypin ;-) got to love a macro here and there ;-)
<FromGitter>
<faultyserver> This is just a minimized example, there's a lot more stuff I'm adding to the generated JSON object
<oprypin>
sigh
<FromGitter>
<faultyserver> I can get around it, it's just that I would expect that `scalar` would accept an object that defines `to_json`
<oprypin>
have you tried `{runner: runner}.to_json`
<FromGitter>
<faultyserver> Yeah, that's one workaround that works outside of a JSON.build
<oprypin>
ok it appears that with json builder you need to give it only actual scalars of JSON::Type, and it makes sense
<FromGitter>
<faultyserver> so how would I get the json representation of an object using `json.field`?
<FromGitter>
<fridgerator> I usually end up adding presenter methods in my models
<FromGitter>
<faultyserver> I guess I could do that...
<FromGitter>
<fridgerator> they take the `json` io as a parameter, and add fields
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<oprypin>
faultyserver, I really don't understand the situation. you are not saying what you want to do, you're saying how one of the possible solution fails
<FromGitter>
<faultyserver> Yeah, I'm not really in search of a solution. I've already written a workaround. My question is really just why doesn't `#scalar` accept objects that define `to_json`, but I guess that's more of something that should be written up as an issue.
<oprypin>
it does not accept them because it's a pure interface, and nothing prevents you from calling to_json yourself.
<oprypin>
here 'pure interface' is not a term, just something i said. it accepts types that can be directly put into json, it's no wonder why magical conversion on the fly is not applied
<FromGitter>
<straight-shoota> Though it would make sense if `JSON::Builder.field` accepted a value that responds to `to_json`
<FromGitter>
<straight-shoota> @johnjansen not a master, but might as well give it a try ^^
<FromGitter>
<johnjansen> nice :-) so i need to split a string on `\s` yielding blocks as close to `n` chars but no more than `n` … e.g. ⏎ ⏎ ```where n = 16 ⏎ “today is a good day” # => [“today is a good”, “day”]``` [https://gitter.im/crystal-lang/crystal?at=59666db61c8697534a19bfd4]
<FromGitter>
<johnjansen> totally off topic of course
<FromGitter>
<faultyserver> thanks @straight-shoota, not sure why `field` with a block didn't occur to me :)
<oprypin>
johnjansen, just find all `\S{,16}`
<oprypin>
wait what, your example does not match what you're saying
<oprypin>
cant be done with regex
<FromGitter>
<johnjansen> ahhh now thats an answer i can live with
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<crystal-gh>
[crystal] straight-shoota opened pull request #4706: Allow `JSON::Builder#field` to accept non-scalar values. (master...jm-json-field) https://git.io/vQSgX
<FromGitter>
<johnjansen> have you read all the source … you know where everything is
<oprypin>
just been looking at all the random stuff people have been asking about, for a long time
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<oprypin>
this one was someone looking why glob performed poorly
<oprypin>
well here's why
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<FromGitter>
<johnjansen> well it might provide me with some clues for my `ls + Regex`
<oprypin>
johnjansen, why do you want glob as part of ls?
<oprypin>
standard ls does not have globbing as far as i understand
<FromGitter>
<johnjansen> haha … i dont … that was the mistake
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<oprypin>
* expansion is part of the shell
<Papierkorb>
It doesn't. Try: `ls \*`
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<FromGitter>
<johnjansen> this is another one of my, im going to build something and learn all i can about the language under the guise of achieving a real goal i am working on
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<FromGitter>
<elorest> asterite still has his github account but is missing on twitter now. Also he’s still listed on the bountysource page.
<oprypin>
scary stuff
<FromGitter>
<elorest> Remember when “why the lucky stiff” vanished? Hope this isn’t like that.
<FromGitter>
<johnjansen> haha … i have a feeling not too many here will remember that @elorest
<oprypin>
wait what
<FromGitter>
<johnjansen> see what i mean
<FromGitter>
<elorest> A lot of guys here remember the early days of ruby I think...
<oprypin>
well not me that's for sure
<FromGitter>
<mjago> @elorest that was my first thought - I used to love _why’s blog `sneaking Ruby through the system` or whatever it was 😄
<FromGitter>
<elorest> Yeah me too. Back in 2005 I switched to ruby because of his insane book about foxes and ruby.
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