$30 off During Our Annual Pro Sale. View Details »

Fun with Swift 4 KeyPaths

Avatar for John Estropia John Estropia
September 17, 2017
Technology
1
650

Fun with Swift 4 KeyPaths

My Lightning Talk at iOSDC 2017 Japan

Avatar for John Estropia

John Estropia

September 17, 2017
Tweet

More Decks by John Estropia

See All by John Estropia
WWDC Party Intro to CoreStore
Avatar for John Estropia johnestropia
0
64
Making an Efficient Deploy Bot
Avatar for John Estropia johnestropia
0
450
Creating Keyboard Extensions
Avatar for John Estropia johnestropia
0
80
Making Sense of Neural Network Training
Avatar for John Estropia johnestropia
0
83
My journey taming Core Data: An intro to the CoreStore library
Avatar for John Estropia johnestropia
0
170
Pairs JP Team's iOS Deployment
Avatar for John Estropia johnestropia
0
950
Making Slackbots deploy iOS apps for you
Avatar for John Estropia johnestropia
2
230
OSSの作法（本題）
Avatar for John Estropia johnestropia
0
80

Other Decks in Technology

See All in Technology
Lambdaの常識はどう変わる？！re:Invent 2025 before after
Avatar for TomoyaIwata iwatatomoya
1
540
Sansanが実践する Platform EngineeringとSREの協創
Avatar for SansanTech sansantech
PRO
2
860
AWSセキュリティアップデートとAWSを育てる話
Avatar for cm-usuda-keisuke cmusudakeisuke
0
280
[CMU-DB-2025FALL] Apache Fluss - A Streaming Storage for Real-Time Lakehouse
Avatar for Jark Wu jark
0
120
Lookerで実現するセキュアな外部データ提供
Avatar for ZOZO Developers zozotech
PRO
0
110
エンジニアとPMのドメイン知識の溝をなくす、 AIネイティブな開発プロセス
Avatar for Michiru Kato applism118
4
1.3k
20251209_WAKECareer_生成AIを活用した設計・開発プロセス
Avatar for syobochim syobochim
7
1.6k
re:Invent 2025 ~何をする者であり、どこへいくのか~
Avatar for tetutetu214 tetutetu214
0
220
AWS Bedrock AgentCoreで作る 1on1支援AIエージェント 〜Memory × Evaluationsによる実践開発〜
Avatar for Yusuke Shimizu yusukeshimizu
6
400
Haskell を武器にして挑む競技プログラミング ─ 操作的思考から意味モデル思考へ
Avatar for Naoya Ito naoya
6
1.5k
Reinforcement Fine-tuning 基礎〜実践まで
Avatar for Morita ch6noota
0
190
Kubernetes Multi-tenancy: Principles and Practices for Large Scale Internal Platforms
Avatar for hhiroshell hhiroshell
0
120

Featured

See All Featured
Bootstrapping a Software Product
Avatar for Garrett Dimon garrettdimon
PRO
307
120k
The Success of Rails: Ensuring Growth for the Next 100 Years
Avatar for Eileen M. Uchitelle eileencodes
47
7.9k
Designing for humans not robots
Avatar for Tammie Lister tammielis
254
26k
Rebuilding a faster, lazier Slack
Avatar for samanthasiow samanthasiow
84
9.3k
Learning to Love Humans: Emotional Interface Design
Avatar for Aarron Walter aarron
274
41k
Build The Right Thing And Hit Your Dates
Avatar for Maggie C. maggiecrowley
38
3k
JavaScript: Past, Present, and Future - NDC Porto 2020
Avatar for David Neal reverentgeek
52
5.8k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
Avatar for Sam Stephenson sstephenson
162
16k
Save Time (by Creating Custom Rails Generators)
Avatar for Garrett Dimon garrettdimon
PRO
32
1.8k
Product Roadmaps are Hard
Avatar for C. Todd Lombardo iamctodd
PRO
55
12k
Bash Introduction
Avatar for André Augusto Costa Santos 62gerente
615
210k
Sharpening the Axe: The Primacy of Toolmaking
Avatar for Bryan Cantrill bcantrill
46
2.6k

Transcript

  1. Fun with Swift 4 KeyPaths iOSDC 2017 John Estropia

  2. • @JohnEstropia • Senior Engineer @ • iOS։ൃ • OSS

    ࣗݾ঺հ http://github.com/JohnEstropia/CoreStore

  3. Swift 4 Smart Keypaths

  4. KVC: Before vs. After Swift 3 Swift 4

  5. KVC: Before vs. After Swift 3 Swift 4

  6. KVO: After Swift 4

  7. Fun with Swift 4 KeyPaths

  8. Predicates (Before)

  9. ͜ͷॻ͖ํ͕Ͱ͖Δͱ࠷ߴͰ͠ΐ͏ʁ

  10. ͜ͷॻ͖ํ͕Ͱ͖Δͱ࠷ߴͰ͠ΐ͏ʁ

  11. KeyPath × Generics × Custom Operator

  12. Custom Operator

  13. KeyPath Generics

  14. KeyPath Generics ͕͜͜Smartʂ

  15. KeyPath→String

  16. ൿີຐ๏property KeyPath→String

  17. Nice Predicates

  18. Sample: CoreStore ( prototype/queryBuilders branch )

  19. Sample: CoreStore ( prototype/queryBuilders branch )

  20. Ҏ্ɺThanks!

  21. େืूதʂ