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

You can give this a try.

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

var origLength = origArr.length;
var updatingLength = updatingArr.length;

//Traverse the original array and replace only if the second array also has the same value
for(i = origLength-1; i >= 0; i--) {
    for(j = updatingLength -1; j >= 0; j--) {
    if(origArr[i].name === updatingArr[j].name) {
        origArr[i] = updatingArr[j];
    }
  }
}

console.log(origArr);