Remove duplicate array es6

Js delete duplicates from array

const names = ['John', 'Paul', 'George', 'Ringo', 'John'];

let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'

Js delete duplicates from array

const names = ['John', 'Paul', 'George', 'Ringo', 'John'];

function removeDups(names) {
  let unique = {};
  names.forEach(function(i) {
    if(!unique[i]) {
      unique[i] = true;
    }
  });
  return Object.keys(unique);
}

removeDups(names); // // 'John', 'Paul', 'George', 'Ringo'

Remove duplicate array es6

let a = [10,20,30,10,30];
let b = [... new Set(a)];
console.log(b);

Javascript remove uniques from array

function getNotUnique(array) {
    var map = new Map();
    array.forEach(a => map.set(a, (map.get(a) || 0) + 1));
    return array.filter(a => map.get(a) > 1);
}

console.log(getNotUnique([1, 2, 2, 4, 4])); //[2, 2, 4, 4]
console.log(getNotUnique([1, 2, 3] )); //[]

Source: stackoverflow.com

Remove duplicate array es6

let a = [10,20,30,10,30];
let b = a.filter((item,index) => a.indexOf(item) === index);
console.log(b);

-1

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);

-1

Similar codes

1 vote290 views1 answer
Html video css
CSS
0 vote336 views1 answer
Bulma modal
CSS Bulma
2 votes280 views1 answer
Bootstrap dark mode
CSS
2 votes280 views1 answer
Css rounded corners at top only
CSS
6 votes290 views2 answers
Border-collapse
CSS
-1 vote284 views2 answers
Css make text one line
CSS
0 vote268 views1 answer
Easyui datagrid header wrap
CSS
1 vote267 views1 answer
-mos css
CSS
50 votes273 views5 answers
Css reset style
CSS
4 votes289 views1 answer
Orientation css max and min width media query
CSS