Organize JavaScript basics

Primitive type value (Primitive values)

The following are all primitive type values (abbreviations: original values):

• Boolean type: True,false
• Number type: 1736,1.351
• String type: ' abc ','ABC '
• Two "no Value (non-values)": Undefined,null

Object (Objects)

All values other than the original value (non-primitive) are objects. Some of the most common types of objects are:

Simple objects (types are object) can be created by object literals:

{    ' Jane ',    ' Doe '}

The above object has two properties: the value of the FirstName property is "Jane", and the value of the LastName property is "Doe".

An array (type is an array) can be created by an array literal:

[' Apple ', ' banana ', ' cherry ']

The above array has three elements that can be accessed through a numeric index. For example, the index of "Apple" is 0.

A regular Expression object (type RegExp) can be created with regular expression literals.

/^a+b+$/

BOOL (booleans)

The primitive values of the Boolean type include True and false. The following operator produces a Boolean value:

• Binary logical operator:&& (with), | | Or
• Prefix logical operator:! (non)
• Equivalent operator: = = = = = =!== = =
• comparison operator (string or number):> >= < <=

Undefined and null (undefined and null)

Note: http://www.cnblogs.com/yanhaijing/p/3685304.html#sect_conventions

Organize JavaScript basics