Array Data Structure Using Java Script : -
Array is a Data Structure which contain a fix number of items and these items should be of the same type.
Basically there are Two things in Array,
1. Element - Each and Every data which is store in array called element.
2. Index - The location of element is called index. we identify the element with the help of index and index is always a numeric value.
Operations we performed on Array:-
Traversing - visiting each and every element of array at least once is called traversing, we can travers the array in using Java Script as well.
example -
let traversingArray = [21,75,98,45,11,16]
for(var i = 0 ; i < traversingArray.length; i ++){
console.log("Index",i +" value "+traversingArray[i])
}
output -
Index 0 value 21
Index 1 value 75
Index 2 value 98
Index 3 value 45
Index 4 value 11
Index 5 value 16
Insertion - Enter a new element in array either in start or in end or we can enter the element on any position of array.
//Replacing the first index or any given index :-
//Enter 25 in the starting of given array [0] index:-
function insertElement(){
var insertionArray = [10,4,6,18,20]
for(var i = 0 ; i < insertionArray.length ; i++){
if(i == 0){
insertionArray[0] = 25
}
}
console.log(insertionArray)
}
insertElement()
OutPut :-
[ 25, 4, 6, 18, 20 ]
//Enter element in the starting of Array: -
//Enter 25 in the starting of given array [0] index:-
function insertElement(){
var pos = 0
var insertionArray = [10,4,6,18,20]
for(var i=insertionArray.length -1;i>= 0;i--){
insertionArray[i+1] = insertionArray[i];
insertionArray[i] = 25;
}
console.log(insertionArray);
}
insertElement();
output: -
[25,10,4,6,18,20]
//Enter 25 at the end of array:-
function insertElement(){
var insertionArray = [10,4,6,18,20]
insertionArray[insertionArray.length] = 25
console.log(insertionArray);
}
insertElement();
output: -
[10,4,6,18,20,25]
//Enter a new element in the middle or any where in array:-
function insertionElement(){
var pos = 5
var x = 30
var implementedArray = [12,34,54,44,76,56]
for(var i = implementedArray.length -1; i >= pos -1; i-- ){
implementedArray[i] = implementedArray[i - 1];
implementedArray[2] = 30;
}
console.log(implementedArray)
}
insertionElement()
output:-
[ 12, 34, 30, 44, 44, 76 ]
Deletion - Deleting a element from the array is called deletion, we can delete the item from the present array.
//Remvoe 32 From the array : -
function removeElement(){
var removalArray = [23,43,65,32,76]
for(var i = 0; i<= removalArray.length - 1; i ++){
removalArray[i] = removalArray[i+1]
}
console.log("hii value",removalArray)
}
removeElement()
OutPut :-
hii value [ 43, 65, 32, 76]
Search - Searching an element in array by value or by index is called searching.
// Search 52 in the given array: -
function searchElement(){
var searchArray = [23,43,65,32,76,52]
for(var i = 0; i<= searchArray.length - 1; i ++){
if(searchArray[i] == 52){
console.log(" we have found the value",searchArray[i])
}
}
}
searchElement()
OutPut : -
we have found the value 52
Updated - we can update the value of index in array.
//update the value 52 with 99
//Remvoe 52 in the array : -
function updateElement(){
var updateArray = [23,43,65,32,76,52]
for(var i = 0; i<= updateArray.length; i ++){
if(updateArray[i] == 52){
updateArray[i] = 99
}
}
console.log(updateArray)
}
updateElement()
OutPut : -
[ 23, 43, 65, 32, 76, 99 ]
These are the operations we can performed on array using java script or any new programming language.
we see all these operations using Program in java Script.
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