How to remove duplicates element from array

In this post i'm going to remove duplicates element from array,i will try with multiple approaches to remove duplicates element from array.

Method 1 Using Set

const array = ["a","b","c","d","a","c","e","f"];
const m1 = [...new Set(array)];
console.log(m1); // ["a", "b", "c", "d", "e", "f"] 

Method 2 Using object

const array = ["a","b","c","d","a","c","e","f"];
let obj = {};
for (let arr of array){
obj[arr]=true;
}
console.log(Object.keys(obj)); // ["a", "b", "c", "d", "e", "f"] 

Method 3 Using Loop

const array = ["a","b","c","d","a","c","e","f"];
const m3 = [];
var i;
var len = array.length
for(i = 0;i

Method 4 Using Filter

const array = ["a","b","c","d","a","c","e","f"];
const m4 = array.filter((el,index)=>array.indexOf(el) == index);
console.log(m4); // ["a", "b", "c", "d", "e", "f"]