Factory Pattern

// Info: http://chimera.labs.oreilly.com/books/1234000000262/ch03.html#factories

function factory() {
  var highlander = {
      name: 'MacLeod'
    };
    
  return {
    get: function get() {
      return highlander;
    }
  };
}

// Other with composition

function Animal(name) {
    //… 
}

function Rabbit(name) {
    var rabbit = Animal(name)
    
    var parentRun = rabbit.run
    
    rabbit.jump = function() {
      alert(name + " jumped!")
    }
    
    rabbit.run = function() {
      parentRun.call(this)
      alert("fast")
    }
    
    return rabbit
}

rabbit = Rabbit("rab")