Christian is a programmer working with Oslo-based consultancy Kodemaker. He has an eclectic background, having worked with systems tuning and ops, server-side applications and JavaScript heavy frontend development. Christian is the author of "Test-Driven JavaScript Development", and he maintains several OSS projects, including the popular Sinon.JS.
Christian's article
Immutability in JavaScript
Christian Johansen covers what immutability is, how to use immutability in JavaScript, and why it's useful.