On this tutorial we’re going to explore the basics of purely functional programming using Scala. One of the principles with purely functional style, is that we have to define concepts in terms of functions.

The basics: Comparing a number

We’re going …

On this page you are going to find some examples of ‘for’ queries.
Let’s start by defining the following database:

 1case class Book(title: String, authors: List[String])
 2
 3val books: List[Book] = List(
 4  Book("structure and interpretation …