October 2017
Intermediate to advanced
210 pages
5h 32m
English
Content preview from Swift 4 Protocol-Oriented Programming - Third Edition
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Recursive data types for reference types only
A recursive data type is a type that contains other values of the same type as a property for the type. Recursive data types are used when we want to define dynamic data structures, such as lists and trees. The size of these dynamic data structures can grow or shrink depending on our runtime requirements.
Linked lists are perfect examples of a dynamic data structure that we would implement using a recursive data type. A linked list is a group of nodes that are linked together and where, in its simplest form, each node maintains a link to the next node in the list. The following diagram shows how a very basic linked list works:
Each node in the list contains some value or data, and it also contains ...
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