Practical Funtional Programming in JavaScript

Within this Video Mike speaks about Functional Programming in JavaScript.

JavaScript is a multi-paradigm language with rich functional programming capabilities. Functional programming does not have to be difficult or hugely theoretical. Quite the opposite – it can help you to solve the most common programming challenges in a more concise and elegant fashion.

In this video we focus on working with arrays in JavaScript. Normally, when dealing with arrays a developer would write a for loop and mutate a variable or two. However, JavaScript already comes with functions, such as, every(), filter(), map(), reduce(), etc. that help you to write better code for array operations.

We also demonstrate how you can combine those functions together in order to encapsulate complex data operations . We analyse performance of some operations and show how certain issues can be solved by using 3rd party libraries, such as lazy.js and Immutable-JS.

Finally, we illustrate how functional programming can become only better in EcmaScript 6.