JavaScript type casting

Question

Consider empty JavaScript array:

var a = [];
alert(a == false); // shows true
alert(!a); // shows false!

How to explain this? What are the

Answer 1

Not sure if this answers the question, but there is a new library for getting around all of Javascript's Typecasting weirdnesses:

Typecast.js

In a sentence, Typecast solves all the simple problems, so you can focus on the big ones. Typecast fixes what's wrong with Javascript by creating a complete platform for strongly-typed variables in Javascript.