key in set js code example
Example 1: js new array from new set
return Array.from(new Set(this.posts.map(e => e.category)))
Example 2: object set js
let nombres = [10, 45, 75, 10 ,24,45 ] ;
//let monSet = new Set(nombres) ;
let monSet = new Set() ;
monSet.add('100') ;
monSet.add('280') ;
//monSet.delete('100');
console.log(monSet.size) ;