Скачать или смотреть Simple Subscript in Swift

Our definition for a class, a struct or an enum can include the definition for a subscript. Having a subscript means that we can treat the object that was instantiated from the type in which the subscript was defined as if is an array. It is possible to define more than one subscript in a given specific type. The subscript that will be used is the one that fits the type of the index we use. Subscripts allow us to query instances of a specific type by writing one or more values in square brackets right after the instance name. We define a subscript in our class using the sucscript keyword, and specifying one or more input parameters and a return type. We will usually use subscripts in order to allow accessing to the member elements in a collection, a list or a sequence.