Removing duplicates in an Array of Objects
// BEST ANSWER - LINEAR TIME SOLUTION
const seen = new Set();
const arr = [
{ id: 1, name: "test1" },
{ id: 2, name: "test2" },
{ id: 2, name: "test3" },
{ id: 3, name: "test4" },
{ id: 4, name: "test5" },
{ id: 5, name: "test6" },
{ id: 5, name: "test7" },
{ id: 6, name: "test8" }
];
const filteredArr = arr.filter(el => {
const duplicate = seen.has(el.id);
seen.add(el.id);
return !duplicate;
});