Dictionaries

A dictionary is another data container, just like an array. But unlike arrays, which store data in a certain order, dictionaries store data using a key-value pair. Instead of associating each element with a predetermined number, like in an array, we associate them with a key that we define ourselves. Because we must define our own keys, there is a more rigid structure in a dictionary than in an array.

Creating a dictionary

Let’s say that we want to store the name, price, and weight of an item in our game. We can do this using a dictionary:

var item = {
   "name": "Boots",
   "price": 5,
   "weight": 3.9
}

Here, we use curly brackets, {}, to define a dictionary. Then, we define a key and its associated value within the curly brackets. For example, the "name" key is associated with the "Boots" value. Each key-value pair must be separated by a comma:

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