Answers for "merge object remove duplicate object array javascript"

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)
 })

javascript merge arrays of objects without duplicates

var merged = [...initialData, ...newData.filter(d => !ids.has(d.ID))];