Perpetually amazed that monads are “too hard for your coworkers”, but side effects that can occur at any time are somehow totally fine.
Now you can call Haskell from Java, or Java from Haskell, more easily than Scala can manage blog.tweag.io/posts/2016-10-…
Jira feature request: literally reach through the screen and strangle the designers of this thing.
There are two basic answers to "how do I" questions in Scala. One is "don't do that". The other is "traverse".