remove duplicate objects from array javascript
const addresses = [...]; // Some array I got from async call
const uniqueAddresses = Array.from(new Set(addresses.map(a => a.id)))
.map(id => {
return addresses.find(a => a.id === id)
})remove duplicate objects from array javascript
const addresses = [...]; // Some array I got from async call
const uniqueAddresses = Array.from(new Set(addresses.map(a => a.id)))
.map(id => {
return addresses.find(a => a.id === id)
})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;
});Copyright © 2021 Codeinu
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