Redundant.js

// A dead-easy data structure representing a database
let ArticlesDatabase = {
  articles: [
  {
    'id': 1,
    'title': 'Insane prank, I broke my leg watch this'
  },
  {
    'id': 2,
    'title': 'Cops arrested me, discover why'
  },
  {
    'id': 3,
    'title': 'Look at this, the second is unbelievable'
  }
],

getArticles: function() { return this.articles },
addArticle: function(article) { this.articles.push(article); }
};

// Let's use our database

console.log(ArticlesDatabase.getArticles());
// => Exactly what you expected, the array with the 3 objects

ArticlesDatabase.addArticle( 
{
  'id':4,
  'title': 'Nice one !'
});

console.log(ArticlesDatabase.getArticles());
// => The array with 4 objects