Reading from the object

We created player objects, what should we do with them now? Of course, they must be transferred to runGame, instead of variables that contained names and points. But how do you use them inside a function?

Object properties can be accessed and values can be retrieved from them. There are two ways to access an individual property. We will look at one of them at right now, and we’ll get acquainted with the second one a little later.

To get the value of a property, it must be accessed using object.key. Such a record is called dot notation and returns object property value if such a property exists. Otherwise you’ll get undefined, that’s nothing. In practice, it looks like this:

var cat = {
  name: 'Muffin',
  age: 5
};
console.log(cat.name); // Logs 'Muffin' in the console
console.log(cat.age); // Logs 5 in the console
console.log(cat.color); // Logs undefined, there is no such a key in the object

Let’s replace variables with player objects in the parameters of function runGame, and with this in mind, replace the access to the parameters in the body of the function.