filter duplicates from array of objects javascript code example
Example 1: how to remove duplicate array object in javascript
let person = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"}];
function removeDuplicates(data, key) {
return [
...new Map(data.map(item => [key(item), item])).values()
]
};
console.log(removeDuplicates(person, item => item.name));
Example 2: remove duplicate objects from array javascript
const addresses = [...];
const uniqueAddresses = Array.from(new Set(addresses.map(a => a.id)))
.map(id => {
return addresses.find(a => a.id === id)
})
Example 3: remove duplicates from array of objects javascript
arr.filter((v,i,a)=>a.findIndex(t=>(t.place === v.place && t.name===v.name))===i)
Example 4: javascript filter array remove duplicates
arrayWithOnlyUniques = [...new Set(arrayWithDuplicates)]