Functional Programming Mastery

Core Principles

The Zen of Functional Programming

Purity is better than side effects Pure functions create predictable, testable code. Functions depend only on inputs and produce no side effects.

Immutability is better than mutation Data that cannot change eliminates entire categories of bugs. State cannot be modified; concurrent operations become naturally safe.

Composition is better than monoliths Small, focused functions combined thoughtfully solve complex problems elegantly.

Declarative is better than imperative Express what you want, not how to get it.