const myArray = ['a', 1, 'a', 2, '1']; const unique = [...new Set(myArray)]; // ['a', 1, 2, '1']
// usage example: var myArray = ['a', 1, 'a', 2, '1']; var unique = myArray.filter((v, i, a) => a.indexOf(v) === i); // unique is ['a', 1, 2, '1']
const unique = [...new Set(array.map(item => item.age))];