How to sort a list in Scala by two fields?

Question

how to sort a list in Scala by two fields, in this example I will sort by lastName and firstName?

case class Row(var firstName: String, var lastName: String,         


        

Answer 1

In general, if you use a stable sorting algorithm, you can just sort by one key, then the next.

rows.sortBy(_.firstName).sortBy(_.lastName)

The final result will be sorted by lastname, then where that is equal, by firstname.