Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't buy this book

This is a book that quickly starts out with a convoluted discussion of the "splice" function, comparing its workings with those of pop, shift, unshift, etc. The author then tells us after all the agony of trying to follow him to forget it -- you'll never use it. The examples fail badly because he's never bothered to explain pop, shift, or any of the other material he slings at us. And so it goes, in this book about a frightfully haphazard language written by the same mind that created the language. Don't buy this book. You'd be better off trying to re-read your college physics text while drunk. There are some excellent WWW tutorials; I ended up relying on them.