If you've gone through Thau's basic JavaScript tutorial (or you already know a bunch ... He picks up here where he left off, starting with the meaning of var and if-then-else statements.

The first step is embracing immutability. Ordinarily with JavaScript, you can change pretty much any variable you want. Any variable you declare can be reassigned to any other value, unless you ...

which means that functions in JavaScript can be passed around like any other variable. While this sounds pretty straightforward, it doesn’t quite telegraph the kind of power you have with first ...

The series starts off with a look at JavaScript fundamentals, including variables, if-then statements ... Thau put together the Advanced JavaScript Tutorial for senior scripters.