stew questions

stew answers

• How do you write foldWhile with the standard library?
• Why is flatMap on a Vector[Option[Int]] whose mapper function result is not a Vector[Option[Int]] valid?
• Checking for a value of a Future
• Why is ~3 equal to -4 in Python?
• Scala Extractor unapply called twice
• Scalaz: Convert ValidationNel of ValidationNel to ValidationNel
• How to compare two objects for equality in Scala?
• How can provide JsonFormats for case class that references itself?
• Specs2 "value in is not a member of String"
• Adding a custom logic to a Scala's constructor