Introduction to JavaScript Array Methods

Push Method in Arrays

const k = [1,2,3,4,5,6]
k.push(7);
console.log(k);

Output

Pop Method in Arrays

const k = [1,2,3,4,5,6]
k.pop()
console.log(k); 

Output

indexOf method in Arrays

const k = [1,2,3,4,5,6]
  console.log(k.indexOf(3)); 

Output

lastIndexOf method in Arrays

const k = [1,2,3,4,5,6]
let x = k.lastIndexOf(6)
console.log(x);

Output

Finding length of an Array

const k = [1,2,3,4,5,6]
let x = k.length
console.log(x);

Output

reverse method in Arrays

const k = [1,2,3,4,5,6]
k.reverse()
console.log(k);

Output

shift method in Arrays

const k = [1,2,3,4,5,6]
let x = k.shift()
console.log(x);

Output

slice method in Arrays

const k = [1,2,3,4,5,6]
        const j = k.slice(1,3)
        console.log(j);

Output

//only starting index for slice
const k = [1,2,4,3,5,6]
console.log(k.slice(1));//will slice from index 2 to 6

Output

sort method in Arrays

const k = [1,2,4,3,5,6]
          k.sort()
          console.log(k);

Output

splice method in Arrays

const k = [1,2,4,3,5,6]
k.splice(2,2) //removes 2 elements from index 2
console.log(k);

Output

//0 here represents remove none
const k = [1,2,4,3,5,6]
k.splice(2,0,88,99) //add two elements at index 2
console.log(k);

Output

//splice for add and remove elements 
//remove 2 elements and add two elements at index 2
const k = [1,2,4,3,5,6]
k.splice(2,2,88,99) //removes 2 elements and adds two elements at index 2
console.log(k);

Output

toString method in Arrays

const k = [1,2,4,3,5,6]
console.log(k.toString());
console.log(k.length);

Output