Foundations of Professional Scala

by Henri Cook

Ask two Scala developers what their language is like and you can receive answers with no overlap. One describes a better Java: concise, practical, immediately productive. The other describes a different discipline entirely, where programs are values and the compiler polices side effects. Both are right, both ship real software, and the gap between them is where most Scala learning goes to die: books and courses pick a side and quietly pretend the other doesn't exist.