I really dislike Either personally. I much prefer Scalatic's "Either with attitude" Or. It's also the only natural use of infix type notation I'm familiar with

I really dislike Either personally. I much prefer Scalatic's "Either with attitude" Or. It's also the only natural use of infix type notation I'm familiar with so that's kind of neat. I frequently see Either abused to represent the lack of Union Types. But then I also see it used for errors. And it's not really a perfect fit for either (no pun intended). http://www.scalactic.org http://www.scalactic.org Every (a non-Empty List) is also nice. I like Scalactic. It adds just a couple of small useful things. Very lightweight. Option (Some or None), Or (Good or Bad) and Try (Success or Failure[T <: Throwable]) cover the bases for me. Just in case others were unaware of scalactic. (sister library to scalatest, so if you're already using scalatest, you're already using scalactic under the covers I believe)