exercises-cats

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Can not do the Eval exercises

4

Hi, On [Cats | Eval](https://www.scala-exercises.org/cats/Eval), we can not do the exercises, the fields we have to fill are already filed with text (apparently scala types) instead of having html inputs...

SuperFola

zhenglaizhang

gokyo

remove defaultTailRecM

2

Per typelevel/cats/1444

pnf

No information on which test is failing

1

In the first cats exercice on [Semigroup](https://www.scala-exercises.org/cats/semigroup), there are four slots to fill. However if a single slot is wrong, then all answers are underlined in red. It's difficult for...

khlumzeemee

Monad & Foldable exercises feedback

2

I'm opening this issue just to give some feedback on these two exercises. - So in Monad exercise `OptionT` is introduced. You can deduce some of its meaning from the...

ggalmazor

Foldable[T].traverse_ exercises accepts wrong answer as correct

1

On the exercise of Foldable `traverse`, it accepts a wrong answer as proper: ```scala import cats.implicits._ def parseInt(s: String): Option[Int] = Either.catchOnly[NumberFormatException](s.toInt).toOption Foldable[List].traverse_(List("1", "2", "3"))(parseInt) should be(Some(42)) ``` Since traverse_...

Fabs

Hello people :). I am trying to run the following code on a scala worksheet `scala 2.12.4`, `sbt 1.0.3`, `cats 1.0.0-MF`: ```scala import cats.Semigroup import cats.data.{NonEmptyList, OneAnd, Validated, ValidatedNel} import...

Fabs

I was going to see if I could debug why the Applicative composition exercise doesn't display correctly and in trying to build exercises-cats, I ran into the NoClassDefFoundError above. I...

ml10

exercise of traverse failed to run

1

https://www.scala-exercises.org/cats/traverse Evaluation failed : Compilation Error ; ERROR -> object Xor is not a member of package cats.data at [181, 188, 188]

erlangxk