Javascript array of objects search

array-of-objects-search.js

"use strict";

var users = [
  {
    id: 1,
    alias: "jdoe",
    name: "John Doe"
  },
  {
    id: 2,
    alias: 'bking',
    name: "Brian King"
  }
];

/* Basic search */
var user = users.find(function (user) {
  return user.id === 2;
});

console.log(user);

/* Search by known key */

function findById(arr, id) {
  return arr.find(function (el) {
    return el.id === id;
  });
}

console.log(findById(users, 2));

/* Search by dynamic key */

function findByKey(arr, key, value) {
  return arr.find(function (el) {
    return el[`${key}`] === value;
  });
}

console.log(findByKey(users, 'id', 2));