ObjectCopying.js

/**
 * Object copying with no mutation.
 */

console.log('Test ObjectASssign');

const x = {
  name: 'Will',
  age:  35,
  hair: {
    color: 'brown',
    length: 'long',
    curly:  true,
  },
  fat: false,
  fastestMile: '6m',
};

console.log('x is ', x)

const mu = {
  name: 'Another Name',
  age:  20,
  hair: {
    color: 'brown',
    length: 'long',
    anotherAttribute: {
      another: 'This is a thing',
      another: 'This is another thing',
    },
    curly:  true,
  },
  fat: false,
  fastestMile: '6m',
};

const y = Object.assign({}, x, mu);

console.log('y is ', y);

console.log('----- next test -----')

var a = {name:'will', things:[1, 2, 3]};
var b = Object.assign({}, a, {name: "Fred"});

console.log(a, b);

b.things = [1, 2, 3, 4];

console.log(a, b);