JavaScript what is a variable containing a variable

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The JavaScript variable can contain a single value:

Example

Var person = "Bill Gates"

Objects are also variables. But an object can contain many values.

Values are written in the form of name: value pairs (names and values are separated by colons).

Example

Var person = {firstName: "Bill", lastName: "Gates", age:62, eyeColor: "blue"}

A JavaScript object is a collection of named values.

Object attribute

The named value in the JavaScript object is called a property.

Attribute value

FirstName Bill

LastName Gates

Age 62

EyeColor blue

Objects written with name-value pairs are similar to:

Associative arrays in PHP

Dictionaries in Python

Hash table in C

Hash Mapping in Java

Hash in Ruby and Perl

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