Data Types, Operators & Primitives

Undefined undefined (a variable that has not been set yet)
Null null (the null pointer - usually set by intent in the code)

Boolean true

String "hello"

Number 2 (and also NaN)

Object {name:"value"}

Array [1,2,3]

Date new Date()

RegExp /.*/g

Function function(){}

var var foo

new new Foo

assignment

delete delete foo.bar there's no real deleting, it just deletes the reference

member foo.bar

call bar()

comparison == ===

Abundancia