scalaz/scalaz

Scalaz: Functional programming for Scala | IRC: irc://irc.freenode.net/scalaz | Discord: https://discord.gg/eYZhcW | Channel logs http://ircbrowse.net/scalaz | Latest stable release: 7.2.26 | http://github.com/scalaz/scalaz | https://scalaz.github.io/scalaz/#scaladoc Wokest message of the day: Well, I personally think that he's solving the problem of typeclasses not being horrible in Scala - @oleg-py

beezee

@beezee

if you're guaranteed success and you just have to do things to make the compiler happy then that you could call pure

Dominic Egger

@GrafBlutwurst

g. f has to be pure because if f can encode it g has to be able to successfully decode it

(sorry phone is terrible for typing about code)

beezee

@beezee

ah yeah that makes sense

Dominic Egger

@GrafBlutwurst

i'll dig more into this. there's some "reinventing the wheel" hiding here i'm sure

Georgi Krastev

@joroKr21

Any opinions on scalaz/scalaz#2076?

Emily Pillmore

@emilypi

@joroKr21 i'm agnostic on lub trickery. What was broken to warrant this fix?

Georgi Krastev

@joroKr21

The current encoding of tagged types includes neither the tag nor the type in implicit scope so we are forced to define orphan instances

But actually it doesn't matter what the encoding is so we just hide it

Emily Pillmore

@emilypi

not that my approval makes much difference anymore as i'm not a maintainer

but yes

agreed

Georgi Krastev

@joroKr21

Thanks :thumbsup:

Alexander Konovalov

@alexknvl

https://twitter.com/hmemcpy/status/1161965133742166016?s=09

Emily Pillmore

@emilypi

ayyy it's out!

nice congrats @alexknvl

realfiretiger

@realfiretiger

hello, does anyone know a smarter way of turning a List[Try[T]] to a Try[List[T]]?

atm I am using this:

      val listOfTrys: List[Try[Int]] = ???
      val acc: Try[List[Int]] = Success(
        List[Int]()
      )
      val result: Try[List[Int]] = listOfTrys.foldRight(acc)((a, b) => b.flatMap(v => a.map(v2 => v2 :: v)))

Luis Martinez

@luis3m

@realfiretiger did you try with sequence/traverse?

realfiretiger

@realfiretiger

i will look into those

Luis Martinez

@luis3m

:+1:

Jacob Niebloom

@niebloomj

Sequence is probably what you are looking for Luis.

Luis Martinez

@luis3m

@niebloomj that's @realfiretiger, not me :)

Jacob Niebloom

@niebloomj

My bad.

@realfiretiger you probably want sequence

subhash28

@subhash28

Hello All, newbie here trying to play around with scalaz. unable to "import scalaz.concurrent.Task". I get this error "Main.scala:4:15: object concurrent is not a member of package scalaz
[error] import scalaz.concurrent.Task". Any pointers please ?

Emily Pillmore

@emilypi

@subhash28 what version?

if you're pulling from HEAD, Task was removed a few PR's ago

subhash28

@subhash28

@emilypi I have tried scalaVersion := "2.11.2"
scalazVersion = "7.1.0"

Emily Pillmore

@emilypi

hmmm. it should be in there then

can you import scalaz._; Scalaz._?

subhash28

@subhash28

yes I can

Emily Pillmore

@emilypi

and scalaz.concurrent?

subhash28

@subhash28

No I cant...I get object concurrent is not a member of package scalaz

Emily Pillmore

@emilypi

then you don't have the scalaz-effect dependency in your dependency list

https://mvnrepository.com/artifact/org.scalaz/scalaz-effect_2.12/7.1.17

that functionality was modularized

it's in the README

subhash28

@subhash28

I am using these sbt settings..http://eed3si9n.com/learning-scalaz/sbt.html

Emily Pillmore

@emilypi

ah...don't do that. Rote code copying things from 7 years ago is never good :smile:. Just use scala 2.13.x and 7.2 for everything

though, I'm still not sure why that's not working for you

It's got to be somthing funky with your setup

maybe we can get a scala programmer in here to help you

Emily Pillmore

@emilypi

@hrhino?

subhash28

@subhash28

@emilypi thanks a lot, just got over the line. Tried version7.2.16. They have "scalaz-concurrent" dependency.

Emily Pillmore

@emilypi

cool ;)

Harrison Houghton

@hrhino

What am I doing?

Emily Pillmore

@emilypi

nothing - they got it figured out :)

Harrison Houghton

@hrhino

Always glad to help.

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