JavaScript - merge two arrays of objects and de-duplicate based on property value

Question

I want to update (replace) the objects in my array with the objects in another array. Each object has the same structure. e.g.

var origArr = [
          


        

Answer 1

const origArr = [
  {name: 'Trump', isRunning: true},
  {name: 'Cruz', isRunning: true},
  {name: 'Kasich', isRunning: true}
];

const updatingArr = [
  {name: 'Cruz', isRunning: false},
  {name: 'Kasich', isRunning: false}
];

let hash = {};

for(let i of origArr.concat(updatingArr)) {
  if(!hash[i]) {
    hash[i.name] = i;
  }
}

let newArr = [];

for(let i in hash) {
  newArr.push(hash[i])
}

console.log(newArr);