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)
})how to remove duplicate array object in javascript
let person = [
{name: "john"},
{name: "jane"},
{name: "imelda"},
{name: "john"},
{name: "jane"}
];
const obj = [...new Map(person.map(item => [JSON.stringify(item), item])).values()];
console.log(obj);remove duplicate objects based on id from array angular 8
function getUnique(arr, comp) {
// store the comparison values in array
const unique = arr.map(e => e[comp])
// store the indexes of the unique objects
.map((e, i, final) => final.indexOf(e) === i && i)
// eliminate the false indexes & return unique objects
.filter((e) => arr[e]).map(e => arr[e]);
return unique;
}
console.log(getUnique(arr,'id'));remove duplicate in aaray of objects
const things = {
thing: [
{ place: 'here', name: 'stuff' },
{ place: 'there', name: 'morestuff1' },
{ place: 'there', name: 'morestuff2' },
],
};
const removeDuplicates = (array, key) => {
return array.reduce((arr, item) => {
const removed = arr.filter(i => i[key] !== item[key]);
return [...removed, item];
}, []);
};
console.log(removeDuplicates(things.thing, 'place'));
// > [{ place: 'here', name: 'stuff' }, { place: 'there', name: 'morestuff2' }]how to check duplicate objects in array and remove in angular
let arr = [
{value: 'L7-LO', name: 'L7-LO'},
{value: '%L7-LO', name: '%L7-LO'},
{value: 'L7-LO', name: 'L7-LO'},
{value: '%L7-LO', name: '%L7-LO'},
{value: 'L7-L3', name: 'L7-L3'},
{value: '%L7-L3', name: '%L7-L3'},
{value: 'LO-L3', name: 'LO-L3'},
{value: '%LO-L3', name: '%LO-L3'}
];
let obj = {};
const unique = () => {
let result = [];
arr.forEach((item, i) => {
obj[item['value']] = i;
});
for (let key in obj) {
let index = obj[key];
result.push(arr[index])
}
return result;
}
arr = unique(); // for example;
console.log(arr);Copyright © 2021 Codeinu
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