It's a very good book. It explains a lot of 'why' and inner working of good practices. It's also fairly comprehensive, ranging from - some evilness (type infe

It's a very good book. It explains a lot of 'why' and inner working of good practices. It's also fairly comprehensive, ranging from - some evilness (type inference with ==, eval and its performance toll) - functions and higher order functions - objects and prototypes. Some good explanations of the all prototype and constructor thing - array, dictionnary and some things to know about their prototypes - api design and concurrency It's 200 pages full of content, I recommend it.