How to Insert Item Specific Index in Array Node JS?

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Hi Friends,

This article will provide example of how to insert item specific index in array node js. This article goes in detailed on insert item specific index in array node.js. you can see node js insert item specific index in array. This tutorial will give you simple example of node.js insert item specific index in array using splice function. follow bellow step for insert item specific index in array using for loop in node js.

There are many ways to insert item specific index in array node js. i will give you two examples using splice() and for loop insert item specific index in array node js.

let's see below a simple example with output:

Install Node JS

This step is not required; however, if you have not created the node js app, then you may go ahead and execute the below command:

mkdir my-app
cd my-app

 
npm init

Example: 1

index.js

//create array list
myArray = [10,20,30,40]
var i;
/*pos is position which we want to insert at which is index + 1.position two in an array is index 1.*/
var pos = 2; //pos=index + 1
//value to insert
var value = 5 
//Initialize from last array element
for(i=myArray.length-1;i>=pos-1;i--){
    myArray[i+1]=myArray[i]
}
myArray[pos-1]=value
console.log(myArray)

Output:

[ 10, 5, 20, 30, 40 ]

Example: 2

index.js

//create array list
numberArray = ['one', 'two', 'four', 'five']
//add array in array list
numberArray.splice(2, 0, 'three');
//show output
console.log(numberArray)

Output:

[ 'one', 'two', 'three', 'four', 'five' ]