JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>

JavaScript

var cities = [{
  name: 'Name 1',
  city: 'city 1',
  developer: 'dev 1',
},
{
  name: 'Name 2',
  city: 'city 2',
  developer: 'dev 2',
},
{
  name: 'Name 3',
  city: 'city 1',
  developer: 'dev 3',
}];


var result = _.uniqBy(cities, 'city');
console.log(result);