JavaScript

To begin with, one should be able to play around with JavaScript in the browser simply using script tags( <script src=""></script>).

The 2 Pillars of JavaScript

According to a certain 2 part blog series (and I agree completely), there are 2 pillars of JavaScript:

1. Objects without classes (and prototypal delegation aka OLOO — Objects Linking to Other Objects)
2. Lambdas (with closure — the keys to functional programming)

If you are an experienced programmer, a quick guide to JavaScript is the following:

1. JavaScript is loosely-typed, and variables are defined with the var keyword. ES6/ES2015 introduces the const and let keywords.
2. Functions are first-class objects, meaning they can be saved to variables.

Books

Online & Free

• http://eloquentjavascript.net/
• WikiBooks JavaScript: http://en.wikibooks.org/wiki/JavaScript

Links

• http://bonsaiden.github.io/JavaScript-Garden/
• http://www.improgrammer.net/simple-yet-powerful-javascript-tips/
• http://jstherightway.org/
• https://reaktor.com/blog/javascript-performance-fundamentals-make-bluebird-fast/?utm_source=javascriptweekly&utm_medium=email

2do

• LoDash guides