datastuff.js

// Two requests
const req1 = [{
  id: 1,
  data: 'data',
}, {
  id: 2,
  data 'data2',
}]

const req2 = [{
  id: 2,
  data: 'cachedData'
}]

// Should theese two become this?
const output = [{
  id: 1,
  data: 'data',
}, {
  id: 2,
  data 'cachedData',
}]