JavaScript
λ Functional programming
Write predictable, reusable code with pure functions, immutability and composition.
What you'll learn
- Write pure functions without side effects and apply immutability instead of mutating data.
- Transform collections with higher-order functions by chaining
map,filterandreduce. - Combine small functions through composition (
pipe) and currying. - Distinguish shallow from deep copies and clone nested data, freezing objects with
Object.freeze.
Lessons
Pure functions and immutabilityPredictable functions that have no side effects. Higher-order functions and map/filter/reduceFunctions that receive or return functions. Composition and curryingCombine small functions into larger ones. Shallow vs deep copyWhy spread is not enough with nested data, and how to truly clone.Practice this module in the app
DevPath is a hands-on course: you read the theory here; in the app you put it into practice with exercises that really run, offline.
Start free in the app →