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; });
