JavaScript-from-Beginner-to-Professional/Chapter 08/Exercise_8.2.js

const arr = ["Laurence", "Mike", "Larry", "Kim", "Joanne", "Laurence", "Mike", "Laurence", "Mike", "Laurence", "Mike"];
const arr2 = arr.filter ( (value, index, array) => {
    console.log(value,index,array.indexOf(value));
    return array.indexOf(value) === index
});
console.log(arr2);