Scala: “any” and “all” functions

Question

It’s predefined and is called exists. And forall would be the “all” function you are looking for.

scala> Vector(3, 4, 5).exists(_ % 2 == 0)
res1: Boolean = true

scala> Vector(3, 4, 5).forall(_ % 2 == 0)
res2: Boolean = false

You can make it more performant using a for loop with a break (from scala.util.control.Breaks). (See the standard library implementation of exists and forall.)
It’s correct.