Javascript map over two arrays of objects

Question

I have two arrays:

const people = [{id:1, name:"John"}, {id:2, name:"Alice"}];
const address = [{id:1, peopleId: 1, address: "Some street 1"}, {id:2, peopleId: 2, address: "Some street 2"}]

How can I filter over this two arrays and get one like this:

const fullData = [{id: 1, name: "John", address: "Some street 1"}, {id: 2, name: "Alice", address: "Some street 2"}]

Answer 1

You can try this.

With the help of map() and find()

const people = [{id:1, name:"John"}, {id:2, name:"Alice"}];
const address = [{id:1, peopleId: 1, address: 'Some street 1'}, {id:2, peopleId: 2, address: 'Some street 2'}]

let op = people.map((e,i)=>{
  let temp = address.find(element=> element.id === e.id)
  if(temp.address) {
    e.address = temp.address;
  }
  return e;
})
console.log(op);

Answer 2

Like this:

const persons = [{id:1, name: 'John'}, {id:2, name: 'Alice'}]

const addresses = [{id:1, peopleId: 1, address: 'Some street 1'}, {id:2, peopleId: 2, address: 'Some street 2'}]

const result = persons.map(person => {
  const addressItem = addresses.find(address => address.peopleId === person.id)
  
  person.address = addressItem 
  ? addressItem.address
  : null
  
  return person
})

console.log(result)