Data Types, Operators and Primitives

README.md

Primitive DataTypes

1. Undefined => undefined
2. Null => null
3. Boolean => true
4. String => "hello"
5. Number => 2

Object DataTypes

1. Object (Object can be refered as Hash as key value pairs.)
2. Array
3. Date
4. RegExp
5. Function

Operators

1. var
2. new
3. assignment
4. delete
5. member
6. call
7. comparison

typeof

1. Undefined -> "undefined" (Unreferenced pointer)
2. Null -> "object" ()
3. Boolean -> "boolean" ()
4. Number -> "number"
5. NaN -> "number"
6. String -> "string"
7. Function -> "function"
8. Array -> "object"
9. Any other Object -> "object"

"==" vs "==="

1. 21 == "21" -> true
2. undefined == null -> true
3. undefined === null -> false
4. 21 === 21 -> true
5. {} === {} -> false
6. NaN === NaN -> false
7. true === {valueOf: function(){return "1"}}

"==" comparison flow diagram

"===" comparison flow diagram