Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Collections in Swift
Search
Nate Cook
March 31, 2016
Programming
0
41
Collections in Swift
Talk at CocoaConf Chicago, March 2016
Nate Cook
March 31, 2016
Tweet
Share
More Decks by Nate Cook
See All by Nate Cook
Swift's Pointy Bits
natecook1000
0
510
Flexible Code for Generic Collections
natecook1000
8
1.2k
SwiftDoc.org Preview
natecook1000
0
280
Other Decks in Programming
See All in Programming
Introducing ReActionView: A new ActionView-Compatible ERB Engine @ Kaigi on Rails 2025, Tokyo, Japan
marcoroth
3
900
アメ車でサンノゼを走ってきたよ!
s_shimotori
0
130
Catch Up: Go Style Guide Update
andpad
0
120
Playwrightはどのようにクロスブラウザをサポートしているのか
yotahada3
7
2.2k
開発者への寄付をアプリ内課金として実装する時の気の使いどころ
ski
0
340
ソフトウェア設計の実践的な考え方
masuda220
PRO
3
420
AI Coding Meetup #3 - 導入セッション / ai-coding-meetup-3
izumin5210
0
390
あなたの知らない「動画広告」の世界 - iOSDC Japan 2025
ukitaka
0
360
After go func(): Goroutines Through a Beginner’s Eye
97vaibhav
0
230
Swiftビルド弾丸ツアー - Swift Buildが作る新しいエコシステム
giginet
PRO
0
1.6k
階層構造を表現するデータ構造とリファクタリング 〜1年で10倍成長したプロダクトの変化と課題〜
yuhisatoxxx
3
890
株式会社 Sun terras カンパニーデック
sunterras
0
200
Featured
See All Featured
Documentation Writing (for coders)
carmenintech
75
5k
RailsConf 2023
tenderlove
30
1.2k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.7k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
33
2.4k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
49
3.1k
Gamification - CAS2011
davidbonilla
81
5.5k
Raft: Consensus for Rubyists
vanstee
139
7.1k
KATA
mclloyd
32
15k
Designing for humans not robots
tammielis
254
25k
Navigating Team Friction
lara
189
15k
Rebuilding a faster, lazier Slack
samanthasiow
84
9.2k
Making Projects Easy
brettharned
119
6.4k
Transcript
Collections in Swift
Nate’s favorite part of Swift: The Standard Library Collections System
Protocol-oriented programming
Protocols in Objective-C
Protocols in Swift
Protocols of Swift collections
This session 1. The “Problem” 2. How Swift's collections work
3. New approaches
None
! " #
None
None
! " #
None
None
None
This session 1. The “Problem” 2. How Swift's collections work
3. New approaches
None
None
A sequence is a series of values we can access
one at a time » 6'2", 5'7", 5'9", 5'4", 5'11" » 0xEF 0xBB 0xBF 0x4E 0x61 0x74 0x65 » 22, 27, 4, 8, 28, 14, ... » 0, 1, 2, 3, 4, 5, 6, 7, ...
Sequences
SequenceType GeneratorType
SequenceType requirements func generate() -> Generator GeneratorType requirements func next()
-> Element?
One element at a time
let numbers = [1, 2, 3, 4] for num in
numbers { print(num) } ...is equivalent to: var gen = numbers.generate() while let num = gen.next() { print(num) }
Iteration » contains(_:) » minimumElement() / maximumElement() » map(_:) /
filter(_:) / reduce(_:combine:) » prefix(_:) / dropFirst(_:)
demo
None
None
Collections provide indexed subscript access to their elements » Arrays
» String views (i.e., "Hi there".characters) » Sets » Dictionaries
CollectionType
CollectionType requirements var startIndex: Index var endIndex: Index subscript(i: Index)
-> Generator.Element
Quick diversion: Index types » Forward index types » Bidirectional
index types » Random-access index types
CollectionType requirements var startIndex: Index var endIndex: Index subscript(i: Index)
-> Generator.Element
Indexed access to elements » Collections are sequences, too »
prefixUpTo(_:), prefixThrough(_:), suffixFrom(_:) » subscript(Range<Index>) » count, isEmpty » indices
Sequenception
demo
None
None
Range-replaceable collections support arbitrary subrange replacement » Pretty much just
arrays
RangeReplaceableCollectionType requirements init() func replaceRange<C: CollectionType where C.Generator.Element == Generator.Element>
(subRange: Range<Index>, with newElements: C)
Mix-and-match » append(_:), appendContentsOf(_:) » insert(_:), insertContentsOf(_:) » removeAtIndex(_:), removeRange(_:)
» removeAll()
demo
None
None
This session 1. The “Problem” 2. How Swift's collections work
3. New approaches
demo
SwiftDoc.org
None
Thank you! Nate Cook @nnnnnnnn