Comments (2)
What version of cats-core do you use?
When I used 1.0.0-MF
, got the same error.
But, I use 1.0.0
, the error does not occur.
libraryDependencies ++= Seq(
"org.typelevel" %% "cats-core" % "1.0.0-MF",
"org.scalatest" %% "scalatest" % "3.0.1" % "test"
)
not good.
↓
libraryDependencies ++= Seq(
"org.typelevel" %% "cats-core" % "1.0.0",
"org.scalatest" %% "scalatest" % "3.0.1" % "test"
)
good.
from scala-with-cats.
All code is compiled before the book is generated so almost surely a version issue. (Current source uses Cats 2 FWIW.)
from scala-with-cats.
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