Scala for Backend Engineering & Functional Programming · Lesson

Common Type Classes

Show, Ordering, Numeric.

Standard Type Classes

Scala's standard library ships several type classes you use daily, sometimes without realizing it:

List.sorted needs an implicit Ordering[A]. The standard library provides instances for numbers, strings, and more.

@main def run(): Unit = {
  println(List(3, 1, 2).sorted)
  println(List("pear", "apple", "fig").sorted)
}