# Array structure

function sum( a, b ) { ..... }

Memory(sum)
|---------|
| a | 0
|---------|
| b | 1
|---------|
| . | 2
|---------|
| . | 3
|---------|

Accessing Data via index

function sum({ a,  b }) { ..... }

on first index has object

Memory(sum)

|---------|
|    a    |  key
|---------|
|    b    |  key
|---------|
|    .    |  key
|---------|
|    .    |  key
|---------|

Accessing Data via key

const keys = {
	"key1": ".....",
	"key2": "....."
	"key3": "....."
	"key4": "....."
	...............
	"keyn": "....."
}

required key1, key2, method? => destructure method

const { key1, key2 } = keys

// X not working
const { TopUser, SecondTop } = keys

key1, key2

const { key1: TopUser , key2: SecondTop } = keys

TopUser, SecondTop


// Array structure
const numbers = [0, 1, 2, 100, 400];

const [ stateZero, AnotherOne ] = numbers;