April 2026
Intermediate
683 pages
25h 29m
English
Content preview from Swift
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3.4 Summary
In this chapter, you learned about collections in Swift. Basically, collections are data structures that group multiple variables into a single, organized container. Swift offers three main collection types, which are summarized in Table 3.20.
|
Collection Type |
Content |
Duplicates |
Use Case |
Specialty |
|---|---|---|---|---|
|
Array |
Indexed/ordered collection of elements |
Yes |
Queue |
Flexibility |
|
Set |
Hashed/unordered collection of elements |
No |
Member list |
Fast element access |
|
Dictionary |
Hashed/unordered key-value pairs |
No |
Product properties |
JSON-like |
Table 3.20 Swift Collection Type Summary
Due to type safety concerns, Swift expects programmers to make use of optionals when accessing collections with flexible/uncertain ...
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