Arrays Part_02
				==============
Reading of elements of an array:
================================
using methods
=============
1) toString():
==============
==> a built-in function in JS
	can be used to convert an array into string.
Syntax:
	array-name.toString()

let sales = [56000, 39995, 43398, 19796, 97890, 59987];

console.log("The Array with Sales (Original Array) = ",sales);

// convert the array into string
sales_result = sales.toString();
console.log("The Array in String Format = ",sales_result);
console.log("The Type = ",typeof sales_result);
console.log("The Type of definition = ",typeof sales);

2) join():
==========
==> when the given array need to convert into the string by joining all the individual elements of an array with the specified delimiter (separator), we can use "join()".

Syntax:
	array-name.join('separator')

let sales = [56000, 39995, 43398, 19796, 97890, 59987];

console.log("The Array with Sales (Original Array) = ",sales);

// joining of array elements into string with specified separator.
sales_join = sales.join('-->');
console.log("The Given Array with separator = ",sales_join);

console.log("The Type of Result = ",typeof sales_join);

3) slice():
===========
==> slice() is a built-in function
	which can be used to acquire the part of the array (from the specified index range).
Syntax:
	array-name.slice(start-index, end-index)
Here:
	from end-index: while the slicing
		we can reduce the one 

let sales = [56000, 39995, 43398, 19796, 97890, 59987];

console.log("The Array with Sales (Original Array) = ",sales);

res1 = sales.slice(2); // from index 2 till the end all elements can acquire.
res2 = sales.slice(1,5); // acquire the array elements with index 1, 2, 3, 4

console.log("Result1 = ",res1);
console.log("Result2 = ",res2);

console.log("The Type of result1 = ",typeof res1);
console.log("The Type of result2 = ",typeof res2);

4) filter():
============
==> can create new array object with elements which are based on the specified condition.
==> the condition for filter() must be define with another function.

Syntax:
	array-name.filter(function(){// logic});

let sales = [56000, 39995, 43398, 19796, 97890, 59987];

console.log("The Array with Sales (Original Array) = ",sales);

// filter condition
function getData(value){
    return value > 50000;
}

filtered_array = sales.filter(getData);

console.log("The Array after the filter = ",filtered_array);

resultant_array = sales.filter(function(sale){return sale < 50000});

console.log("The Resultant Array = ",resultant_array);

5) find():
=========
==> based on the condition it can return the first occurred element from the given array.
Syntax:
	array-name.find(function(){//logic});

let sales = ['56000', '39995', 43398, 19796, 97890, 59987];

console.log("The Array with Sales (Original Array) = ",sales);

// filtered condition
function getData(value){
    return value > 50000;
}

let res1 = sales.find(getData);

console.log(res1);
console.log(typeof res1);

let res2 = sales.find(function(data){return data < 50000});

console.log(res2);
console.log(typeof res2);

6) map()
========
Syntax:
	array-name.map(function(){//logic});

let sales = ['56000', '39995', 43398, 19796, 97890, 59987];

console.log("The Array with Sales (Original Array) = ",sales);

console.log("All array elements = ");

sales.map(function(value){
    document.write(`<li> ${value} </li>`);
})
=====================================================
using loops
===========
	for loop
	while loop
	do while loop

for loop
========
Syntax:
	for(var iteration-variable = 0;iteration-variable < array.length;++iterator-variable){
	//logic
}

let sales = ['56000', '39995', 43398, 19796, 97890, 59987];

console.log("The Array Elements = ");

// forward accessing
for(var sale = 0;sale < sales.length;++sale)
{
    console.log(sales[sale]);
}
console.log();

// reverse Accessing
for(var s = sales.length - 1;s >= 0;--s){
    console.log(sales[s]);
}

while loop:
===========
Syntax:
	initialization = 0
	while(initialization < array.lenth){
		//logic
		// update
	}

let sales = ['56000', '39995', 43398, 19796, 97890, 59987];

console.log("The Array Elements = ");

// forward accessing
let i = 0;
while(i < sales.length){
    console.log(sales[i]);
    i++;
}
console.log();

// reverse Accessing
j = sales.length - 1;
while(j >= 0){
    console.log(sales[j]);
    j--;
}
===================================================
using iterators
===============
two different iterators
	1) for-in
	=========
		an iterator used to access/read only the properties of array.
		==> to get values using for-in, we should use the []

let sales = ['56000', '39995', 43398, 19796, 97890, 59987];

console.log("The Array Elements = ");

for(var s in sales){
    console.log(`${s} --> ${sales[s]}`);
}

	2) for-of
	==========
		is an iterator can use to access the array element values.

let sales = ['56000', '39995', 43398, 19796, 97890, 59987];

console.log("The Array Elements = ");

for(var s of sales){
    console.log(s);
}