Test equality of record structures as maps, in JavaScript, using reduce. Assuming maps have same structure.

recordequality.js

var map1 = {name: "DJ", colour: "green"};
var map2 = {name: "DJ", colour: "green"};

Object.keys(map1).reduce(function(bool, prop) {
  return bool && map1[prop] === map2[prop];
}, true); // => true

map2.name = "Joseph";

Object.keys(map1).reduce(function(bool, prop) {
  return bool && map1[prop] === map2[prop];
}, true); // => false