null created by dtstanley - https://repl.it/Indd/1

Indd-1.js

var person ={
  name: ['Bob', 'Smith'],
  age:32,
  gender:'male',
  interests: ['music','skiing'],
  bio: function(){
    alert(this.name[0] + ' ' +this.name[1] + ' is ' + this.age + ' years old. He likes ' + this.interests[0] + ' and ' + this.interests[1] + '.');
  },
  greeting: function(){
    alert('Hi! I\'m ' + this.name[0] + '.');
  }
};

person.name[0] = ['Stephens'];
person.age= [44];
person.interests[1]=['the bible'];
person.bio();
person.greeting();