Merge Array of Objects by Property using Lodash

Question

I have two arrays of objects that represent email addresses that have a label and a value:

var original = [
  {
    label: \'private\',
    value: \'private@         


        

Answer 1

In case you are using lodash 3.x where _.unionBy() was not there, you can combine _.union() and _.uniq() to get the same result.

var original = [
  { label: 'private', value: 'private@johndoe.com' },
  { label: 'work', value: 'work@johndoe.com' }
];

var update = [
  { label: 'private', value: 'me@johndoe.com' },
  { label: 'school', value: 'schol@johndoe.com' }
];

var result = _.uniq(_.union(update, original), "label"); 

console.log(result);