The Mastering the Arcane Art of JavaScript-mancy series are my humble attempt at bringing my love for JavaScript to all other C# developers that haven’t yet discovered how awesome this language and its whole ecosystem are. These articles are excerpts of the super duper awesome JavaScript-Mancy book a compendium of all things JavaScript for C# developers.

JavaScript OOP story is pretty special. When I started working seriously with JavaScript some years ago, one of my first concerns as a C# developer coming to JavaScript was to find out how to write a class. I had a lot of prowess in C# and I wanted to bring all that knowledge and ability into the world of JavaScript, so my first approach was to try to map every C# concept into JavaScript. I saw classes, which are such a core construct in C# and which were such an important part of my programming style at the time, as my secret passage to being proficient in JavaScript.

Well, it took me a long while to understand how to mimic classical inheritance in JavaScript but it was time well spent because along the way I learnt a lot about JavaScript and about the many different ways in which it supports object-oriented programming. This quest helped me look beyond classical inheritance into other OOP styles more adequate to JavaScript where flexibility and expressiveness reign supreme over the strict and fixed taxonomies of classes.

In this series of articles about JavaScript OOP I will attempt to bring you with me through the same journey that I experienced. We will start with how to achieve classical inheritance in JavaScript, so you can get a basic level of proficiency by translating your C# skills into JavaScript and then we will move beyond that into new patterns that truly leverage JavaScript as a language and which will blow your mind.

The Mastering the Arcane Art of JavaScript-mancy series are my humble attempt at bringing my love for JavaScript to all other C# developers that haven’t yet discovered how awesome this language and its whole ecosystem are. These articles are excerpts of the super duper awesome JavaScript-Mancy book a compendium of all things JavaScript for C# developers.

In More Useful Function Patterns: Multiple Arguments I wrote about rest parameters, a new ES6 feature, that lets you define functions with an arbitrary number of arguments just like params in C#.

The spread operator works sort of in an opposite way to the rest operator. Where the rest operator takes a variable number of arguments and packs them into an array, the spread operator takes and array and expands it into its compounding items.

Let’s find out how this new ES6 feature can help you write more readable code.