Adding Javascript object arrays based on key-value pair (id)

combine-arrays-by-id.js

// Add the number property of array1 and array2 where the id matches and declare as array3
let array1 = [{ id: 1, number: 3}, { id: 3, number: 4}, { id: 2, number: 4}]
let array2 = [{ id: 1, number: 3}, { id: 2, number: 5}, {id: 3,number: 3}]
let array3 = [];

for (let i = 0; i < array2.length; i++) {
  for (let j = 0; j < array1.length; j++) {
    if (array2[i].id === array1[j].id) {
      array3.push({
        id: array2[i].id,
        number: array1[j].number + array2[i].number
      })
    }
  }
}
console.log(array3);