Example 1: js delete duplicates from array
const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'
Example 2: javascript remove duplicates from array
var myArr = [1, 2, 2, 2, 3];
var mySet = new Set(myArr);
myArr = [...mySet];
console.log(myArr);
// 1, 2, 3
Example 3: remove duplicates array javascript
var data = [1, 2, 'Peter', 3, 3,'Peter', 2, 2, 1, 2, 3, 4, 4, 5, 4];
var unique = data.filter((v, i, a) => a.indexOf(v) === i);
Example 4: remove duplicate array es6
let a = [10,20,30,10,30];
let b = a.filter((item,index) => a.indexOf(item) === index);
console.log(b);
Example 5: remove duplicate array es6
let a = [10,20,30,50,30];
let b = a.reduce((unique,item) => unique.includes(item) ? unique: [... unique, item] ,[]);
console.log(b);