Merge specific properties of objects together with JavaScript

Question

So I have an array of objects like so:

[
  {
    name: "Joe Smith",
    job: "Custodian",
    age: 35,
    id: "3421"
  },
  {
    n         


        

Answer 1

With lodash, you could group the array and map the wanted properties.

var data = [{ name: "Joe Smith", job: "Janitor", age: 35, id: "3421" }, { name: "George Henderson", job: "CEO", age: 43, id: "5098" }, { name: "Joe Smith", job: "Cook", age: 35, id: "3421" }, { name: "Sam Doe", job: "Technician", age: 22, id: "1538" }, { name: "Joe Smith", job: "Dishwasher", age: 35, id: "3421" }],
    result = _(data)
        .groupBy('id')
        .map(array => ({ ...array[0], job: _.join(_.map(array, 'job'), ", ") }))
        .value();

console.log(result);

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