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Swift Data Structure and Algorithms

You're reading from   Swift Data Structure and Algorithms Implement Swift structures and algorithms natively

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Product type Paperback
Published in Nov 2016
Publisher Packt
ISBN-13 9781785884504
Length 286 pages
Edition 1st Edition
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Author (1):
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Mario Eguiluz Alebicto Mario Eguiluz Alebicto
Author Profile Icon Mario Eguiluz Alebicto
Mario Eguiluz Alebicto
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Toc

Table of Contents (10) Chapters Close

Preface 1. Walking Across the Playground FREE CHAPTER 2. Working with Commonly Used Data Structures 3. Standing on the Shoulders of Giants 4. Sorting Algorithms 5. Seeing the Forest through the Tree 6. Advanced Searching Methods 7. Graph Algorithms 8. Performance and Algorithm Efficiency 9. Choosing the Perfect Algorithm

Iterators, sequences, and collections


The Swift standard library provides several built-in collection types that we looked at back in Chapter 2,  Working with Commonly Used Data Structures. The Swift language runtime provides several language features for working with collections, such as subscripts for shortcuts to access collection elements, and for…in control flow for iterating over collections. By conforming to the built-in protocols, IteratorProtocol, Sequence, and Collection, your custom collection types will gain the same type of access the common language constructs use when using subscript and for…in syntax as native Swift collection types.

Iterators

An iterator is any type that conforms to the IteratorProtocol protocol. The sole purpose of IteratorProtocol is to encapsulate the iteration state of a collection by providing the next() method, which iterates over a collection, returning the next element in a sequence or nil if the end has been reached.

The IteratorProtocol protocol is...

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