null value

Functional error handling in Scala

Because functional programming is like algebra, there are no null values or exceptions. But of course you can still have exceptions when you try to access servers that are down or files that are missing, so what can you do? This lesson demonstrates the techniques of functional error handling in Scala.

Scala best practice: Eliminate null values from your code alvin June 21, 2015 - 4:45pm

This is an excerpt from the Scala Cookbook (partially modified for the internet). This is Recipe 20.5, “Scala best practice: Eliminate null values from your code.”

Problem

Tony Hoare, inventor of the null reference way back in 1965, refers to the creation of the null value as his “billion dollar mistake.” In keeping with modern best practices, you want to eliminate null values from your code.