Functional Programming - workshop

15 minutes workshop on functional programming.

Code snippets:
https://gist.github.com/alexcanessa/988036c04f48a7cc2cc05824990bf4cd

Exercises:
https://gist.github.com/alexcanessa/0719dcbd3f5143c739fc8cc5fe456b24

Transcript

1. @alexcanessa functional programming Functional Programming Everything is immutable.
2. @alexcanessa functional programming Mutable and Immutable Strings: var str = ‘alex’; str.slice(0, 2); // ‘al’ str; // ‘alex’ // N.B. str += ‘ canessa’; // ‘alexcanessa’ // the value ‘alex’ didn’t change!
3. @alexcanessa functional programming Mutable and Immutable Numbers: // Imaging an environment where 2 + 5 // Changes the value 2 // AH!
4. @alexcanessa functional programming Mutable and Immutable Array and Object? var arr = [1, 2]; arr.push(3); arr; // [1, 2, 3]
5. @alexcanessa functional programming Functional Programming 1. Everything is immutable 2. Statelessness 3. Avoid side effects (pure functions)
6. @alexcanessa functional programming Higher-order functions 1. Map 2. Reduce 3. Filter n. Others… Want to have a look?
7. @alexcanessa functional programming Converting to ES6 The Arrow function, returns [1, 2, 3].map(function (number) { return number + 2; }); [1, 2, 3].map(number => number + 2);
8. @alexcanessa functional programming Exercises! Time to grab your laptop
9. @alexcanessa functional programming Thanks Questions?