Examples of ‘for’ queries with Scala

On this page you are going to find some examples of ‘for’ queries. Let’s start by defining the following database: case class Book(title: String, authors: List[String]) val books: List[Book] = List( Book(“structure and interpretation of computer programs”, List(“abelson, harald”, “sussman, gerald j.”)), Book(“introduction to functional programming”, List(“bird, richard”, “wadler, phil”)), Book(“effective java”, List(“bloch, joshua”)), Book(“java…