Jung Kim, profile picture
Uploaded byJung Kim
1,749 views

Letswift19-clean-architecture

Here are the key points about GRASP patterns: 1. GRASP stands for General Responsibility Assignment Software Patterns. It is a set of 9 patterns used to assign responsibilities to classes in object-oriented design. 2. Properly assigning responsibilities and distributing them among classes is a core part of object-oriented design. Developers and designers should be familiar with these patterns. 3. The 9 GRASP patterns are: Information Expert, Creator, Controller, Low Coupling, High Cohesion, Indirection, Polymorphism, Pure Fabrication, and Protected Variations. Each pattern provides guidance on distributing responsibilities in a certain context. 4. When designing a system, analyzing which classes should have which responsibilities based

Embed presentation

Downloaded 311 times
1 / 104
2 / 104
3 / 104
4 / 104
5 / 104
6 / 104
7 / 104
8 / 104
9 / 104
10 / 104
11 / 104
12 / 104
13 / 104
14 / 104
15 / 104
16 / 104
17 / 104
18 / 104
19 / 104
20 / 104
21 / 104
22 / 104
23 / 104
24 / 104
25 / 104
26 / 104
27 / 104
28 / 104
29 / 104
30 / 104
31 / 104
32 / 104
33 / 104
34 / 104
35 / 104
36 / 104
37 / 104
38 / 104
39 / 104
40 / 104
41 / 104
42 / 104
43 / 104
44 / 104
45 / 104
46 / 104
47 / 104
48 / 104
49 / 104
50 / 104
51 / 104
52 / 104
53 / 104
54 / 104
55 / 104
56 / 104
57 / 104
58 / 104
59 / 104
60 / 104
61 / 104
62 / 104
63 / 104
64 / 104
65 / 104
66 / 104
67 / 104
68 / 104
69 / 104
70 / 104
71 / 104
72 / 104
73 / 104
74 / 104
75 / 104
76 / 104
77 / 104
78 / 104
79 / 104
80 / 104
81 / 104
82 / 104
83 / 104
84 / 104
85 / 104
86 / 104
87 / 104
88 / 104
89 / 104
90 / 104
91 / 104
92 / 104
93 / 104
94 / 104
95 / 104
96 / 104
97 / 104
98 / 104
99 / 104
100 / 104
101 / 104
102 / 104
103 / 104
104 / 104
🙌
(?)
1. 🤓
• • https://swiftkorea.github.io/meetup/2#session-time-5 2018 • • https://www.slideshare.net/godrm/letswift18-1
? 191 1% 58% 41% ( ) ( ?)
Software maintenance is not 'keep it working like before'. It is 'keep it being useful in a changing world' - Jessica Kerr
• • •UI • • • • • • • , • • https://soojin.ro/review/ https://google.github.io/eng-practices/review/
rpc: remove size limit on RPC server message freelist. Servers like FizzBuzz have very large messages and would benefit from reuse. Make the freelist larger, and add a goroutine that frees the freelist entries slowly over time, so that idle servers eventually release all freelist entries. Construct a Task with a TimeKeeper to use its TimeStr and Now methods. Add a Now method to Task, so the borglet() getter method can be removed (which was only used by OOMCandidate to call borglet’s Now method). This replaces the methods on Borglet that delegate to a TimeKeeper. Allowing Tasks to supply Now is a step toward eliminating the dependency on Borglet. Eventually, collaborators that depend on getting Now from the Task should be changed to use a TimeKeeper directly, but this has been an accommodation to refactoring in small steps. Continuing the long-range goal of refactoring the Borglet Hierarchy.
, ,
? ? ? ? ?
? + +
Main - , , , Reusability - DRY, components, generics Reliability - Exception handling and cleanup Extensibility Security - , , , Performance - , Lazy Loading, , Scalability - Usability -
1. ( ) - - TDD - ( ) 2. ( ) - , , - private public 3. ( ) - - , 4. ( ) - , - .
1. , , , • • • • • • •
string, array ,
( )
2. , , • • • • • • • •
3. • • • , , , , • • , , , • , , • , ,
4. SOLID .
1. SRP (Single-Responsibility Principle) ( , , ) . . 2. OCP (Open-Close Principle) , . . 3. LSP (Liskov Substitution Principle) ( ) . ( ) . 4. DIP (Dependency-Inversion Principle) . ( ) , . 5. ISP (Interface-Segregation Principle) ( ) .
Employee + calculatePay + reportHours + save CFO COO CTO
#1 PayCalculator EmployeeSaver HourReporter + calculatePay + reportHours + saveEmployee Employee Data
#2 PayCalculator EmployeeSaver HourReporter + calculatePay + reportHours + saveEmployee Employee Data Employee Facade + calculatePay + reportHours + save
OutputView MyPoint /
OutputView MyPoint <<protocol>> Drawable Protocol Oriented Programming
ShapeFactory Point type ShapeType <Protocol> Line Triangle Rect Polygon
User1 User2 User3 Cafe +foo +bar +hop
User1 User2 <<interface>> FooCafe +foo User3 Cafe +foo +bar +hop <<interface>> BarCafe +bar <<interface>> HopCafe +hop
GameManager Player Impl <<interface>> PlayerFactory +makePlayer Player Factory +makePlayer <<interface>> Player ( ) ( )
5. .
(Immutable) (Mutable) (Transaction Memory)
5. GRASP 9
GRASP 9 9가지 General Responsibility Assignment Software Patterns 집합 객체 책임을 할당하는 것은 OOD(객체 지향 설계) 핵심 설계 방법 중에 하나 개발자와 설계자라면 이런 패턴에 익숙해져야 함 1.정보 담당자 Information Expert 2.소유권한 Creator 3.컨트롤러 Controller 4.낮은 연결 Low Coupling 5.높은 응집도 High Cohesion 6.간접 참조 Indirection 7.다형성 Polymorphism 8.순수 조립 Pure Fabrication 9.변화 보호 Protected Variations https://medium.com/@codesquad_yoda/ -grasp- -d5e37a1bb5dc
🧑💻
godrm / LadderGame OH-MY / LadderGame master master 1. fork 2. clone ( ) step1 3. checkout -b step1 // // 4. add / commit 5. push step16. Pull Request 7. master http://github.com/godrm/LadderGame
class ReservationAgency { func reserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let movie = screening.getMovie() var discountable = false for condition in movie.getDiscountConditions() { if condition.getType() == .Period { discountable = screening.getWhenScreened().getDayOfWeek().equals(codition.getDayOfWeek()) && condition.getStartTime().compareTo(screening.getWhenScreend().toLocalTime()) <= 0 && condition.getEndTime().compareTo(screening.getWhenScreend().toLocalTime()) <= 0 && } else { discountable = condition.getSequence() == screening.getSequence() } if discountable { break } } var fee : Money if discountable { var discountAmount = Money.ZERO switch movie.getMovieType() { case AMOUNT_DISCOUNT: discountAmount = movie.getDiscountAmount() case PERCENT_DISCOUNT: discountAmount = movie.getFee().times(movie.getDiscountPercent()) case NONE_DISCOUNT: break } fee = movie.getFee().minus(discountAmount).times(audienceCount) } else { free = movie.getFee() } return Reservation(custom, screening, fee, audienceCount) } } ReservationAgency
ReservationAgency class ReservationAgency { func reserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let discountable = mayDiscountable(screening) let fee = calculateFee(with: screening, discountable: discountable, audienceCount: audienceCount) return Reservation(screening, customer, audienceCount, fee) } }
2. 👨🎨
Abstraction
➔ main() input() -> process() -> output() validate() format()save() ➔ - - - - -
Client Employee calculatePay() monthlyBasePay() SalariedEmployee HourlyEmployee calculatePay() monthlyBasePay() calculatePay() monthlyBasePay() func calculatePay(taxRate: Double) -> Double { if (hourly) { return calculateHourlyPay(taxRate) } return calculateSalariedPay(taxRage) }
• : goto • : + ( ) • : /
property method encapsulation inheritance polymorphism class instance design pattern
Encapsulation +
Main HL1 HL2 HL3 ML1 ML2 ML3 ML4 ML5 ML6 LL1 LL1 LL3 LL4 LL5 LL6 LL7 LL8 LL9 LL10 LL11 LL12
HL1 ML1 + Foo() <<Protocol>> AM + Foo() 호출을 하는 모듈과 호출 받는 모듈 모두 소스 코드 의존성을 원하는 방향으로 설정할 수 있다. 소스 코드 의존성을 원하는 방향으로 관리할 수 있기 때문에 모듈, 컴포넌트 또는 배포가능한 단위로 서로 의존하지 않도록 컴파일할 수 있다. 결국 서로 독립적으로 배포를 할 수 있다. (배포 독립성)
Financial Report Controller Financial Report Presenter <I> Screen Presenter Screen View Model Screen View Web View <DS> <I> Financial Report Request Financial Report Requester Financial Report Response <DS> <DS> <I> Financial Report Generator Financial Report Gateway <I> Financial Report Entities Financial Data Mapper Financial Database Printer Presenter Print View Model Print View PDF View <DS> <I> Screen Presenter Printer Presenter Controller Interactor Database PDF ViewWeb View
Financial Report Controller Financial Report Interactor Financial Database PDF ViewWeb View Screen Presenter Print Presenter
http://blog.cleancoder.com/uncle-bob/2012/08/13/the-clean-architecture.html
<I> <I>
View View Model Presenter Controller Input Data Input Boundary Output Boundary Output Data Data Access Interface Data Access Database Entities Use Case Interactor <I> <DS> <I> <DS> <I> <DS>
// / View Controller Model Presenter View
Model - View - Controller Controller : Coordination Model : Data View : Display / UIViewController NSObject UIView
1. : , ? 2. : - ? 3. : ? 4. : , ? 5. : ? Point of View
MVC : objc App Architecture
MVVM + C : objc App Architecture
VIPER : objc App Architecture
3. 🧹 POP = Value Type + OOP + FP
Classes Are Awesome • Encapsulation • Access Control • Abstraction • Namespace • Expressive Syntax • Extensibility ClassesClassesClassesTypes I can do all that with structs and enums. WWDC 2015 : POP
POP = Value Type + OOP + FP
class Ordered { func precedes(other: Ordered) -> Bool { fatalError("implement me!") } } class Number : Ordered { var value: Double = 0 override func precedes(other: Ordered) -> Bool { return self.value < (other as! Number).value } } OOP with Class
protocol Ordered { func precedes(other: Self) -> Bool } struct Number : Ordered { var value: Double = 0 func precedes(other: Number) -> Bool { return self.value < other.value } } POP with struct
• • . • GRASP
: 1* * 1 1 1..*
Information Expert 1: ? ?:Screening
Information Export 1: ?:Screening 2: :Movie 3*: :Discount Condition :Discount Condition :Discount Condition
Screening Movie Discount Condition 1: 2: 3:
(High Cohesion) (Low Cohesion)
(High Coupling) (Low Coupling) AA
Creator 1: ?:Screening 2: :Movie 3*: :Discount Condition :Discount Condition :Discount Condition :Reservation 4: <<create>>
class Screening { func reserve(with customer: Customer, audienceCount: Int) -> Reservation { } } class Screening { private var movie : Movie private var sequence : Int private var whenScreened : DateTime func reserve(with customer: Customer, audienceCount: Int) -> Reservation { } } class Screening { private var movie : Movie private var sequence : Int private var whenScreened : DateTime func reserve(with customer: Customer, audienceCount: Int) -> Reservation { return Reservation(with: customer, screening: self, fee:calculateFee(audienceCount), audienceCount) } func calculateFee(int audienceCount) -> Money { return movie.calculateMovieFee(self).times(audienceCount) } } Screening
class Movie { func calculateMovieFee(screening: Screening) -> Money { } } class Movie { private let title : String private let runningTime : TimeInterval private let fee : Money private var discountConditions = Array<DiscountCondition>() private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double func calculateMovieFee(screening: Screening) -> Money { } } Movie
class Movie { enum MovieType { case AmountDiscount case PercentDiscount case NoneDiscount } private let title : String private let runningTime : TimeInterval private let fee : Money private var discountConditions = Array<DiscountCondition>() private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double func calculateMovieFee(screening: Screening) -> Money { if isDiscountable(for: screening) { return fee.minus(calculateDiscountAmount()) } return fee } private func isDiscountable(for: Screening) -> Bool { return discountConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } } Movie
class DiscountCondition { func isSatisfied(by screening: Screening) -> Bool { } } class DiscountCondition { private let type : DiscountConditionType private let sequence : Int private let dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date func isSatisfied(by screening: Screening) -> Bool { if type == .period { return isSatisfiedByPeriod(screening) } return isSatisfiedBySequence(screening) } private func isSatisfiedByPeriod(_ screening: Screening) -> Bool { return dayOfWeek.equals(screening.whenScreened.dayOfWeek) && startTime.compare(to: screening.whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: screening.whenScreended.toLocalTime() >= 0) } private func isSatisfiedBySequence(_ screening: Screening) -> Bool { return sequence == screening.sequence } } DiscountCondition
class Screening { private var movie : Movie private(set) var sequence : Int private(set) var whenScreened : DateTime func reserve(with customer: Customer, audienceCount: Int) -> Reservation { return Reservation(with: customer, screening: self, fee:calculateFee(audienceCount), audienceCount) } func calculateFee(int audienceCount) -> Money { return movie.calculateMovieFee(self).times(audienceCount) } } Screening & DiscountCondition class DiscountCondition { enum DiscountConditionType { case Sequence, Period } private let type : DiscountConditionType private let sequence : Int private let dayOfWeek : DayOfWeek private let startTime : DateTime private let endTime : DateTime //…
SRP ( )
class PeriodCondition { private let dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date init(dayOfWeek: DayOfWeek, startTime: DateTime, endTime: DateTime) { self.dayOfWeek = dayOfWeek self.startTime = startTime self.endTime = endTime } func isSatisfied(by screening: Screening) -> Bool { return dayOfWeek.equals(screening.whenScreened.dayOfWeek) && startTime.compare(to: screening.whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: screening.whenScreended.toLocalTime() >= 0) } } PeriodCondition - SequenceCondition class SequenceCondition { private let sequence : Int init(with sequence: Int) { self.sequence = sequence } func isSatisfied(by screening: Screening) -> Bool { return sequence == screening.sequence } }
:Movie :Period Condition :Movie :Sequence Condition Moive
class Movie { enum MovieType { case AmountDiscount case PercentDiscount case NoneDiscount } private let title : String private let runningTime : TimeInterval private let fee : Money private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double private var periodConditions = Array<PeriodCondition>() private var sequenceConditions = Array<SequenceCondition>() func calculateMovieFee(screening: Screening) -> Money { if isDiscountable(for: screening) { return fee.minus(calculateDiscountAmount()) } return fee } private func mayPeriodConditions(with screening: Screening) -> Bool { return periodConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } private func maySequenceConditions(with screening: Screening) -> Bool { return sequenceConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } private func isDiscountable(for: Screening) -> Bool { return mayPeriodConditions(with: screening) || maySequenceConditions(with: screening) } Movie
:Sequence Condition :Period Condition :Movie :Discount Condition DiscountCondition protocol DiscountCondition { func isSatisfied(by screening: Screening) -> Bool } class PeriodCondition : DiscountCondition { } class SequenceCondition : DiscountCondition { }
class Movie { enum MovieType { case AmountDiscount case PercentDiscount case NoneDiscount } private let title : String private let runningTime : TimeInterval private let fee : Money private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double private var discountConditions = Array<DiscountCondition>() func calculateMovieFee(screening: Screening) -> Money { if isDiscountable(for: screening) { return fee.minus(calculateDiscountAmount()) } return fee } private func isDiscountable(for: Screening) -> Bool { return discountConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } Movie
Protected Variations Movie -title +calculateMovieFee() Screening <<interface>> DiscountCondition + isSatisfiedBy() SequenceCondition + isSatisfiedBy() PeriodCondition + isSatisfiedBy() + reserve() movie discountConditions
Movie Movie -title +calculateMovieFee() Screening <<interface>> DiscountCondition + isSatisfiedBy() SequenceCondition + isSatisfiedBy() PeriodCondition + isSatisfiedBy() + reserve() movie discountConditions Percent DiscountMovie None DiscountMovie Amount DiscountMovie #calculateDiscountAmount() #calculateDiscountAmount() #calculateDiscountAmount()
anObject foobar[ ]; instance method self anObject action message[ ] anObject.foobar()
, , self anObject 1. message[ ] operation method2. 3.
➔
before class ReservationAgency { func reserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let movie = screening.getMovie() var discountable = false for condition in movie.getDiscountConditions() { if condition.getType() == .Period { discountable = screening.whenScreened().getDayOfWeek().equals(codition.getDayOfWeek()) && condition.getStartTime().compareTo(screening.whenScreend().toLocalTime()) <= 0 && condition.getEndTime().compareTo(screening.whenScreend().toLocalTime()) <= 0 && } else { discountable = condition.getSequence() == screening.getSequence() } if discountable { break } } var fee : Money if discountable { var discountAmount = Money.ZERO switch movie.getMovieType() { case AMOUNT_DISCOUNT: discountAmount = movie.getDiscountAmount() case PERCENT_DISCOUNT: discountAmount = movie.getFee().times(movie.getDiscountPercent()) case NONE_DISCOUNT: break } fee = movie.getFee().minus(discountAmount).times(audienceCount)
after class ReservationAgency { func reserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let fee = screening.calculateFee(audienceCount) return Reservation(custom, screening, fee, audienceCount) } }
exception class PeriodCondition : DiscountCondition { private let dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date init(dayOfWeek: DayOfWeek, startTime: DateTime, endTime: DateTime) { self.dayOfWeek = dayOfWeek self.startTime = startTime self.endTime = endTime } func isSatisfied(by screening: Screening) -> Bool { return dayOfWeek.equals(screening.whenScreened.dayOfWeek) && startTime.compare(to: screening.whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: screening.whenScreended.toLocalTime() >= 0) } } class PeriodCondition : DiscountCondition { private let dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date // func isSatisfied(by screening: Screening) -> Bool { return screening.isDiscountable(dayOfWeek: dayOfWeek, startTime: startTime, endTime: endTime) } } extension Screening { func isDiscountable(dayOfWeek: DayOfWeek, startTime: DateTime, endTime: DateTime) -> Bool { return dayOfWeek.equals(whenScreened.dayOfWeek) && startTime.compare(to: whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: whenScreended.toLocalTime() >= 0) } }
–JK “iOS , .”
Letswift19-clean-architecture

More Related Content

PDF
DockerとKubernetesをかけめぐる
byKohei Tokunaga
 
PDF
モバイルゲームの「大規模な開発」かつ「高頻度の更新」を実現するための開発環境整備の取り組み
byMorioImai
 
PDF
YugabyteDBを使ってみよう（NewSQL/分散SQLデータベースよろず勉強会 #1 発表資料）
byNTT DATA Technology & Innovation
 
PPTX
MongoDBが遅いときの切り分け方法
byTetsutaro Watanabe
 
PPTX
世界一わかりやすいClean Architecture
byAtsushi Nakamura
 
PDF
BuildKitの概要と最近の機能
byKohei Tokunaga
 
PDF
[JCConf 2022] Compose for Desktop - 開發桌面軟體的新選擇
byShengyou Fan
 
PPTX
世界一わかりやすいClean Architecture release-preview
byAtsushi Nakamura
 
DockerとKubernetesをかけめぐる
byKohei Tokunaga
 
モバイルゲームの「大規模な開発」かつ「高頻度の更新」を実現するための開発環境整備の取り組み
byMorioImai
 
YugabyteDBを使ってみよう（NewSQL/分散SQLデータベースよろず勉強会 #1 発表資料）
byNTT DATA Technology & Innovation
 
MongoDBが遅いときの切り分け方法
byTetsutaro Watanabe
 
世界一わかりやすいClean Architecture
byAtsushi Nakamura
 
BuildKitの概要と最近の機能
byKohei Tokunaga
 
[JCConf 2022] Compose for Desktop - 開發桌面軟體的新選擇
byShengyou Fan
 
世界一わかりやすいClean Architecture release-preview
byAtsushi Nakamura
 

What's hot

PDF
Native Memory Tracking
byTakahiro YAMADA
 
PDF
DDD x CQRS 更新系と参照系で異なるORMを併用して上手くいった話
byKoichiro Matsuoka
 
PPTX
DeNAの最新のマスタデータ管理システム Oyakata の全容
bysairoutine
 
PDF
オススメのJavaログ管理手法 ～コンテナ編～（Open Source Conference 2022 Online/Spring 発表資料）
byNTT DATA Technology & Innovation
 
PPTX
Metaspace
byYasumasa Suenaga
 
PDF
超実践 Cloud Spanner 設計講座
bySamir Hammoudi
 
PDF
Spanner から GKE、Spinnaker、そして SRE まで、コロプラが今挑戦していること[Google Cloud INSIDE Games ...
byGoogle Cloud Platform - Japan
 
PDF
Getting started with Next.js
byGökhan Sarı
 
PDF
RESTful Web アプリの設計レビューの話
byTakuto Wada
 
PDF
이벤트 기반 분산 시스템을 향한 여정
byArawn Park
 
PDF
5分でわかるクリーンアーキテクチャ
byKenji Tanaka
 
PDF
Webブラウザ上で動作する帳票エンジンを作る話
byterurou
 
PPTX
さくっと理解するSpring bootの仕組み
byTakeshi Ogawa
 
PPTX
root権限無しでKubernetesを動かす
byAkihiro Suda
 
PDF
DDD sample code explained in Java
by増田 亨
 
PDF
負荷試験ツールlocustを使おう
byiRidge, Inc.
 
PDF
【Unite Tokyo 2019】AWS for Unity Developers
byUnityTechnologiesJapan002
 
PDF
ヤフー社内でやってるMySQLチューニングセミナー大公開
byYahoo!デベロッパーネットワーク
 
PPTX
Prometheus入門から運用まで徹底解説
by貴仁 大和屋
 
PDF
コンテナ未経験新人が学ぶコンテナ技術入門
byKohei Tokunaga
 
Native Memory Tracking
byTakahiro YAMADA
 
DDD x CQRS 更新系と参照系で異なるORMを併用して上手くいった話
byKoichiro Matsuoka
 
DeNAの最新のマスタデータ管理システム Oyakata の全容
bysairoutine
 
オススメのJavaログ管理手法 ～コンテナ編～（Open Source Conference 2022 Online/Spring 発表資料）
byNTT DATA Technology & Innovation
 
Metaspace
byYasumasa Suenaga
 
超実践 Cloud Spanner 設計講座
bySamir Hammoudi
 
Spanner から GKE、Spinnaker、そして SRE まで、コロプラが今挑戦していること[Google Cloud INSIDE Games ...
byGoogle Cloud Platform - Japan
 
Getting started with Next.js
byGökhan Sarı
 
RESTful Web アプリの設計レビューの話
byTakuto Wada
 
이벤트 기반 분산 시스템을 향한 여정
byArawn Park
 
5分でわかるクリーンアーキテクチャ
byKenji Tanaka
 
Webブラウザ上で動作する帳票エンジンを作る話
byterurou
 
さくっと理解するSpring bootの仕組み
byTakeshi Ogawa
 
root権限無しでKubernetesを動かす
byAkihiro Suda
 
DDD sample code explained in Java
by増田 亨
 
負荷試験ツールlocustを使おう
byiRidge, Inc.
 
【Unite Tokyo 2019】AWS for Unity Developers
byUnityTechnologiesJapan002
 
ヤフー社内でやってるMySQLチューニングセミナー大公開
byYahoo!デベロッパーネットワーク
 
Prometheus入門から運用まで徹底解説
by貴仁 大和屋
 
コンテナ未経験新人が学ぶコンテナ技術入門
byKohei Tokunaga
 

Similar to Letswift19-clean-architecture

PDF
스위프트를 여행하는 히치하이커를 위한 스타일 안내
byJung Kim
 
PPTX
Pro typescript.ch03.Object Orientation in TypeScript
bySeok-joon Yun
 
PDF
Swift 3 Programming for iOS : Protocol
byKwang Woo NAM
 
PDF
Twins: Object Oriented Programming and Functional Programming
byRichardWarburton
 
PDF
Clean Code�Chapter 3. (1)
byFelix Chen
 
PDF
LetSwift RxSwift 시작하기
byWanbok Choi
 
PDF
Swift Study #7
bychanju Jeon
 
PDF
Cocoa heads 09112017
byVincent Pradeilles
 
PDF
Hello Swift Final 5/5 - Structures and Classes
byCody Yun
 
PPTX
slide23-soliddddddddddddddddddddddddd.pptx
bynazircse
 
PDF
InterConnect: Server Side Swift for Java Developers
byChris Bailey
 
PDF
Letswift Swift 3.0
bySehyun Park
 
PPTX
Object-oriented programming
byJieyi Wu
 
PDF
Introduction to Swift 2
byJoris Timmerman
 
PDF
Twins: OOP and FP
byRichardWarburton
 
PDF
From android/java to swift (3)
byallanh0526
 
PPTX
Best practices iOS meetup - pmd
bySuyash Gupta
 
PDF
TWINS: OOP and FP - Warburton
byCodemotion
 
PDF
slide23-solidddddddddddddddddddddddddddddd.pdf
bynazircse
 
PDF
Swift rocks! #1
byHackraft
 
스위프트를 여행하는 히치하이커를 위한 스타일 안내
byJung Kim
 
Pro typescript.ch03.Object Orientation in TypeScript
bySeok-joon Yun
 
Swift 3 Programming for iOS : Protocol
byKwang Woo NAM
 
Twins: Object Oriented Programming and Functional Programming
byRichardWarburton
 
Clean Code�Chapter 3. (1)
byFelix Chen
 
LetSwift RxSwift 시작하기
byWanbok Choi
 
Swift Study #7
bychanju Jeon
 
Cocoa heads 09112017
byVincent Pradeilles
 
Hello Swift Final 5/5 - Structures and Classes
byCody Yun
 
slide23-soliddddddddddddddddddddddddd.pptx
bynazircse
 
InterConnect: Server Side Swift for Java Developers
byChris Bailey
 
Letswift Swift 3.0
bySehyun Park
 
Object-oriented programming
byJieyi Wu
 
Introduction to Swift 2
byJoris Timmerman
 
Twins: OOP and FP
byRichardWarburton
 
From android/java to swift (3)
byallanh0526
 
Best practices iOS meetup - pmd
bySuyash Gupta
 
TWINS: OOP and FP - Warburton
byCodemotion
 
slide23-solidddddddddddddddddddddddddddddd.pdf
bynazircse
 
Swift rocks! #1
byHackraft
 

More from Jung Kim

PDF
Let'Swift 2019 키노트
byJung Kim
 
PDF
Letswift18 워크숍#1 스위프트 클린코드와 코드리뷰
byJung Kim
 
PDF
Letswift18 키노트
byJung Kim
 
PDF
개발자를 위한 넓고 얕은 지식
byJung Kim
 
PDF
Let'Swift 17 키노트
byJung Kim
 
PDF
Swift와 Objective-C를 함께 쓰는 방법
byJung Kim
 
PDF
마스터즈 오픈세미나 - 소프트웨어가좋아요
byJung Kim
 
PDF
소프트웨어로 미래를 준비하는 사람들
byJung Kim
 
PDF
Developerｗay-2016-camp
byJung Kim
 
PDF
Swift internals
byJung Kim
 
PDF
Swift2 smalltalk osxdev
byJung Kim
 
PDF
모바일 트렌드와 iOS
byJung Kim
 
PDF
개발자로 살아가는 길, 그리고 NEXT
byJung Kim
 
PDF
차세대컴파일러, VM의미래: 애플 오픈소스 LLVM
byJung Kim
 
Let'Swift 2019 키노트
byJung Kim
 
Letswift18 워크숍#1 스위프트 클린코드와 코드리뷰
byJung Kim
 
Letswift18 키노트
byJung Kim
 
개발자를 위한 넓고 얕은 지식
byJung Kim
 
Let'Swift 17 키노트
byJung Kim
 
Swift와 Objective-C를 함께 쓰는 방법
byJung Kim
 
마스터즈 오픈세미나 - 소프트웨어가좋아요
byJung Kim
 
소프트웨어로 미래를 준비하는 사람들
byJung Kim
 
Developerｗay-2016-camp
byJung Kim
 
Swift internals
byJung Kim
 
Swift2 smalltalk osxdev
byJung Kim
 
모바일 트렌드와 iOS
byJung Kim
 
개발자로 살아가는 길, 그리고 NEXT
byJung Kim
 
차세대컴파일러, VM의미래: 애플 오픈소스 LLVM
byJung Kim
 

Recently uploaded

PDF
SLIDE PROPARTNER SUMMIT 2025 - ITALY.pdf
bygiuo
 
PDF
Pet Care Service App Development Company
byV3CUBE TECHNOLABS
 
PDF
LogiNext Media Kit & Company Overview 2025
bysanikaroy72
 
PPTX
Marketo API Deep Dive From Basics to AI-Ready Foundations - January 2026.pptx
bybbedford2
 
PDF
Why I Volunteer at FOSDEM and You Should Too
byImma Valls Bernaus
 
PDF
谷歌留痕技术教程[ 𝙩𝙤𝙥 𝟮𝟯𝟯. 𝙘 𝙤𝙢 ]
by6stynggfo
 
PDF
Accelerating Data Validation with QuerySurge AI
byRTTS
 
PDF
Introducing MySQL HeatWave Migration Assistant
byAlexander Hitrov
 
PDF
LogiNext Media Kit & Company Overview 2025
byswatishahz9031
 
PDF
LogiNext Media Kit & Company Overview 2025
bysmritipatil055
 
PDF
Physiotherapist App Development for Modern Rehabilitation
byV3CUBE TECHNOLABS
 
PDF
Smart ways to se AI in your business , presentation
byAI n Dot Net
 
PDF
Own Your Domain Before It Owns You - Domain Driven Design for Pragmaticians
byPosedio GmbH
 
PPTX
Windows File System Monitoring Tool Using C and C++
byAkshay Muley
 
PDF
Water Delivery App Development Solutions.pdf
byeSiteWorld TechnoLabs Pvt. Ltd.
 
PDF
ChampionMATES – Compete With Friends. Predict Sports. Become the Champion.
byRafal Ksiazek
 
PDF
AI-native development: from Prompt to Platform
byMaxim Salnikov
 
PPTX
Applicius Technologies: Full Service Overview for Branding, SEO, Web & App De...
byappliciustech
 
PDF
Visualizing Your Data Lake with Grafana - Amsterdam
byImma Valls Bernaus
 
PDF
Manual Testing Still Matters: 7 Areas Where Humans Beat Automation
byKiwiQA Services
 
SLIDE PROPARTNER SUMMIT 2025 - ITALY.pdf
bygiuo
 
Pet Care Service App Development Company
byV3CUBE TECHNOLABS
 
LogiNext Media Kit & Company Overview 2025
bysanikaroy72
 
Marketo API Deep Dive From Basics to AI-Ready Foundations - January 2026.pptx
bybbedford2
 
Why I Volunteer at FOSDEM and You Should Too
byImma Valls Bernaus
 
谷歌留痕技术教程[ 𝙩𝙤𝙥 𝟮𝟯𝟯. 𝙘 𝙤𝙢 ]
by6stynggfo
 
Accelerating Data Validation with QuerySurge AI
byRTTS
 
Introducing MySQL HeatWave Migration Assistant
byAlexander Hitrov
 
LogiNext Media Kit & Company Overview 2025
byswatishahz9031
 
LogiNext Media Kit & Company Overview 2025
bysmritipatil055
 
Physiotherapist App Development for Modern Rehabilitation
byV3CUBE TECHNOLABS
 
Smart ways to se AI in your business , presentation
byAI n Dot Net
 
Own Your Domain Before It Owns You - Domain Driven Design for Pragmaticians
byPosedio GmbH
 
Windows File System Monitoring Tool Using C and C++
byAkshay Muley
 
Water Delivery App Development Solutions.pdf
byeSiteWorld TechnoLabs Pvt. Ltd.
 
ChampionMATES – Compete With Friends. Predict Sports. Become the Champion.
byRafal Ksiazek
 
AI-native development: from Prompt to Platform
byMaxim Salnikov
 
Applicius Technologies: Full Service Overview for Branding, SEO, Web & App De...
byappliciustech
 
Visualizing Your Data Lake with Grafana - Amsterdam
byImma Valls Bernaus
 
Manual Testing Still Matters: 7 Areas Where Humans Beat Automation
byKiwiQA Services
 

Letswift19-clean-architecture

  • 2.
  • 3.
  • 4.
  • 5.
    • • https://swiftkorea.github.io/meetup/2#session-time-5 2018 • • https://www.slideshare.net/godrm/letswift18-1
  • 6.
  • 7.
    Software maintenance is not'keep it working like before'. It is 'keep it being useful in a changing world' - Jessica Kerr
  • 9.
    • • •UI • • • • • • • , • • https://soojin.ro/review/ https://google.github.io/eng-practices/review/
  • 10.
    rpc: remove sizelimit on RPC server message freelist. Servers like FizzBuzz have very large messages and would benefit from reuse. Make the freelist larger, and add a goroutine that frees the freelist entries slowly over time, so that idle servers eventually release all freelist entries. Construct a Task with a TimeKeeper to use its TimeStr and Now methods. Add a Now method to Task, so the borglet() getter method can be removed (which was only used by OOMCandidate to call borglet’s Now method). This replaces the methods on Borglet that delegate to a TimeKeeper. Allowing Tasks to supply Now is a step toward eliminating the dependency on Borglet. Eventually, collaborators that depend on getting Now from the Task should be changed to use a TimeKeeper directly, but this has been an accommodation to refactoring in small steps. Continuing the long-range goal of refactoring the Borglet Hierarchy.
  • 11.
  • 12.
  • 13.
  • 14.
    Main - ,, , Reusability - DRY, components, generics Reliability - Exception handling and cleanup Extensibility Security - , , , Performance - , Lazy Loading, , Scalability - Usability -
  • 17.
    1. ( ) - - TDD - ( ) 2. ( ) - , , - private public 3. ( ) - - , 4. ( ) - , - .
  • 18.
    1. , , , • • • • • • •
  • 19.
  • 20.
  • 21.
    2. , , • • • • • • • •
  • 24.
    3. • • •, , , , • • , , , • , , • , ,
  • 26.
  • 27.
    1. SRP (Single-ResponsibilityPrinciple) ( , , ) . . 2. OCP (Open-Close Principle) , . . 3. LSP (Liskov Substitution Principle) ( ) . ( ) . 4. DIP (Dependency-Inversion Principle) . ( ) , . 5. ISP (Interface-Segregation Principle) ( ) .
  • 28.
  • 29.
  • 30.
    #2 PayCalculator EmployeeSaver HourReporter + calculatePay + reportHours +saveEmployee Employee Data Employee Facade + calculatePay + reportHours + save
  • 31.
  • 32.
  • 33.
  • 34.
  • 35.
    User1 User2 <<interface>> FooCafe +foo User3 Cafe +foo +bar+hop <<interface>> BarCafe +bar <<interface>> HopCafe +hop
  • 36.
  • 37.
  • 38.
  • 39.
  • 40.
    GRASP 9 9가지 GeneralResponsibility Assignment Software Patterns 집합 객체 책임을 할당하는 것은 OOD(객체 지향 설계) 핵심 설계 방법 중에 하나 개발자와 설계자라면 이런 패턴에 익숙해져야 함 1.정보 담당자 Information Expert 2.소유권한 Creator 3.컨트롤러 Controller 4.낮은 연결 Low Coupling 5.높은 응집도 High Cohesion 6.간접 참조 Indirection 7.다형성 Polymorphism 8.순수 조립 Pure Fabrication 9.변화 보호 Protected Variations https://medium.com/@codesquad_yoda/ -grasp- -d5e37a1bb5dc
  • 41.
  • 42.
    godrm / LadderGameOH-MY / LadderGame master master 1. fork 2. clone ( ) step1 3. checkout -b step1 // // 4. add / commit 5. push step16. Pull Request 7. master http://github.com/godrm/LadderGame
  • 44.
    class ReservationAgency { funcreserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let movie = screening.getMovie() var discountable = false for condition in movie.getDiscountConditions() { if condition.getType() == .Period { discountable = screening.getWhenScreened().getDayOfWeek().equals(codition.getDayOfWeek()) && condition.getStartTime().compareTo(screening.getWhenScreend().toLocalTime()) <= 0 && condition.getEndTime().compareTo(screening.getWhenScreend().toLocalTime()) <= 0 && } else { discountable = condition.getSequence() == screening.getSequence() } if discountable { break } } var fee : Money if discountable { var discountAmount = Money.ZERO switch movie.getMovieType() { case AMOUNT_DISCOUNT: discountAmount = movie.getDiscountAmount() case PERCENT_DISCOUNT: discountAmount = movie.getFee().times(movie.getDiscountPercent()) case NONE_DISCOUNT: break } fee = movie.getFee().minus(discountAmount).times(audienceCount) } else { free = movie.getFee() } return Reservation(custom, screening, fee, audienceCount) } } ReservationAgency
  • 45.
    ReservationAgency class ReservationAgency { funcreserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let discountable = mayDiscountable(screening) let fee = calculateFee(with: screening, discountable: discountable, audienceCount: audienceCount) return Reservation(screening, customer, audienceCount, fee) } }
  • 46.
  • 48.
  • 49.
    ➔ main() input() -> process()-> output() validate() format()save() ➔ - - - - -
  • 50.
    Client Employee calculatePay() monthlyBasePay() SalariedEmployee HourlyEmployee calculatePay() monthlyBasePay() calculatePay() monthlyBasePay() funccalculatePay(taxRate: Double) -> Double { if (hourly) { return calculateHourlyPay(taxRate) } return calculateSalariedPay(taxRage) }
  • 51.
    • : goto • : + ( ) • : /
  • 52.
  • 53.
  • 54.
    Main HL1 HL2 HL3 ML1ML2 ML3 ML4 ML5 ML6 LL1 LL1 LL3 LL4 LL5 LL6 LL7 LL8 LL9 LL10 LL11 LL12
  • 55.
    HL1 ML1 + Foo() <<Protocol>> AM + Foo() 호출을하는 모듈과 호출 받는 모듈 모두 소스 코드 의존성을 원하는 방향으로 설정할 수 있다. 소스 코드 의존성을 원하는 방향으로 관리할 수 있기 때문에 모듈, 컴포넌트 또는 배포가능한 단위로 서로 의존하지 않도록 컴파일할 수 있다. 결국 서로 독립적으로 배포를 할 수 있다. (배포 독립성)
  • 57.
  • 58.
  • 59.
  • 60.
  • 61.
  • 62.
    // / View ControllerModel Presenter View
  • 63.
    Model - View- Controller Controller : Coordination Model : Data View : Display / UIViewController NSObject UIView
  • 65.
    1. : ,? 2. : - ? 3. : ? 4. : , ? 5. : ? Point of View
  • 66.
    MVC : objc AppArchitecture
  • 67.
    MVVM + C :objc App Architecture
  • 68.
    VIPER : objc AppArchitecture
  • 69.
    3. 🧹 POP =Value Type + OOP + FP
  • 71.
    Classes Are Awesome •Encapsulation • Access Control • Abstraction • Namespace • Expressive Syntax • Extensibility ClassesClassesClassesTypes I can do all that with structs and enums. WWDC 2015 : POP
  • 72.
    POP = ValueType + OOP + FP
  • 73.
    class Ordered { funcprecedes(other: Ordered) -> Bool { fatalError("implement me!") } } class Number : Ordered { var value: Double = 0 override func precedes(other: Ordered) -> Bool { return self.value < (other as! Number).value } } OOP with Class
  • 74.
    protocol Ordered { funcprecedes(other: Self) -> Bool } struct Number : Ordered { var value: Double = 0 func precedes(other: Number) -> Bool { return self.value < other.value } } POP with struct
  • 76.
  • 77.
  • 78.
  • 79.
  • 80.
  • 81.
  • 82.
  • 83.
  • 84.
    class Screening { funcreserve(with customer: Customer, audienceCount: Int) -> Reservation { } } class Screening { private var movie : Movie private var sequence : Int private var whenScreened : DateTime func reserve(with customer: Customer, audienceCount: Int) -> Reservation { } } class Screening { private var movie : Movie private var sequence : Int private var whenScreened : DateTime func reserve(with customer: Customer, audienceCount: Int) -> Reservation { return Reservation(with: customer, screening: self, fee:calculateFee(audienceCount), audienceCount) } func calculateFee(int audienceCount) -> Money { return movie.calculateMovieFee(self).times(audienceCount) } } Screening
  • 85.
    class Movie { funccalculateMovieFee(screening: Screening) -> Money { } } class Movie { private let title : String private let runningTime : TimeInterval private let fee : Money private var discountConditions = Array<DiscountCondition>() private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double func calculateMovieFee(screening: Screening) -> Money { } } Movie
  • 86.
    class Movie { enumMovieType { case AmountDiscount case PercentDiscount case NoneDiscount } private let title : String private let runningTime : TimeInterval private let fee : Money private var discountConditions = Array<DiscountCondition>() private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double func calculateMovieFee(screening: Screening) -> Money { if isDiscountable(for: screening) { return fee.minus(calculateDiscountAmount()) } return fee } private func isDiscountable(for: Screening) -> Bool { return discountConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } } Movie
  • 87.
    class DiscountCondition { funcisSatisfied(by screening: Screening) -> Bool { } } class DiscountCondition { private let type : DiscountConditionType private let sequence : Int private let dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date func isSatisfied(by screening: Screening) -> Bool { if type == .period { return isSatisfiedByPeriod(screening) } return isSatisfiedBySequence(screening) } private func isSatisfiedByPeriod(_ screening: Screening) -> Bool { return dayOfWeek.equals(screening.whenScreened.dayOfWeek) && startTime.compare(to: screening.whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: screening.whenScreended.toLocalTime() >= 0) } private func isSatisfiedBySequence(_ screening: Screening) -> Bool { return sequence == screening.sequence } } DiscountCondition
  • 88.
    class Screening { privatevar movie : Movie private(set) var sequence : Int private(set) var whenScreened : DateTime func reserve(with customer: Customer, audienceCount: Int) -> Reservation { return Reservation(with: customer, screening: self, fee:calculateFee(audienceCount), audienceCount) } func calculateFee(int audienceCount) -> Money { return movie.calculateMovieFee(self).times(audienceCount) } } Screening & DiscountCondition class DiscountCondition { enum DiscountConditionType { case Sequence, Period } private let type : DiscountConditionType private let sequence : Int private let dayOfWeek : DayOfWeek private let startTime : DateTime private let endTime : DateTime //…
  • 89.
  • 90.
    class PeriodCondition { privatelet dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date init(dayOfWeek: DayOfWeek, startTime: DateTime, endTime: DateTime) { self.dayOfWeek = dayOfWeek self.startTime = startTime self.endTime = endTime } func isSatisfied(by screening: Screening) -> Bool { return dayOfWeek.equals(screening.whenScreened.dayOfWeek) && startTime.compare(to: screening.whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: screening.whenScreended.toLocalTime() >= 0) } } PeriodCondition - SequenceCondition class SequenceCondition { private let sequence : Int init(with sequence: Int) { self.sequence = sequence } func isSatisfied(by screening: Screening) -> Bool { return sequence == screening.sequence } }
  • 91.
  • 92.
    class Movie { enumMovieType { case AmountDiscount case PercentDiscount case NoneDiscount } private let title : String private let runningTime : TimeInterval private let fee : Money private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double private var periodConditions = Array<PeriodCondition>() private var sequenceConditions = Array<SequenceCondition>() func calculateMovieFee(screening: Screening) -> Money { if isDiscountable(for: screening) { return fee.minus(calculateDiscountAmount()) } return fee } private func mayPeriodConditions(with screening: Screening) -> Bool { return periodConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } private func maySequenceConditions(with screening: Screening) -> Bool { return sequenceConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } private func isDiscountable(for: Screening) -> Bool { return mayPeriodConditions(with: screening) || maySequenceConditions(with: screening) } Movie
  • 93.
    :Sequence Condition :Period Condition :Movie :Discount Condition DiscountCondition protocol DiscountCondition { funcisSatisfied(by screening: Screening) -> Bool } class PeriodCondition : DiscountCondition { } class SequenceCondition : DiscountCondition { }
  • 94.
    class Movie { enumMovieType { case AmountDiscount case PercentDiscount case NoneDiscount } private let title : String private let runningTime : TimeInterval private let fee : Money private let movieType : MovieType private let discountAmount : Money private let discountPercent : Double private var discountConditions = Array<DiscountCondition>() func calculateMovieFee(screening: Screening) -> Money { if isDiscountable(for: screening) { return fee.minus(calculateDiscountAmount()) } return fee } private func isDiscountable(for: Screening) -> Bool { return discountConditions.filter{ $0.isSatisfied(by: screening) }.count > 0 } Movie
  • 95.
    Protected Variations Movie -title +calculateMovieFee() Screening <<interface>> DiscountCondition +isSatisfiedBy() SequenceCondition + isSatisfiedBy() PeriodCondition + isSatisfiedBy() + reserve() movie discountConditions
  • 96.
    Movie Movie -title +calculateMovieFee() Screening <<interface>> DiscountCondition + isSatisfiedBy() SequenceCondition +isSatisfiedBy() PeriodCondition + isSatisfiedBy() + reserve() movie discountConditions Percent DiscountMovie None DiscountMovie Amount DiscountMovie #calculateDiscountAmount() #calculateDiscountAmount() #calculateDiscountAmount()
  • 97.
    anObject foobar[ ]; instancemethod self anObject action message[ ] anObject.foobar()
  • 98.
    , , self anObject 1. message[] operation method2. 3.
  • 99.
  • 100.
    before class ReservationAgency { funcreserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let movie = screening.getMovie() var discountable = false for condition in movie.getDiscountConditions() { if condition.getType() == .Period { discountable = screening.whenScreened().getDayOfWeek().equals(codition.getDayOfWeek()) && condition.getStartTime().compareTo(screening.whenScreend().toLocalTime()) <= 0 && condition.getEndTime().compareTo(screening.whenScreend().toLocalTime()) <= 0 && } else { discountable = condition.getSequence() == screening.getSequence() } if discountable { break } } var fee : Money if discountable { var discountAmount = Money.ZERO switch movie.getMovieType() { case AMOUNT_DISCOUNT: discountAmount = movie.getDiscountAmount() case PERCENT_DISCOUNT: discountAmount = movie.getFee().times(movie.getDiscountPercent()) case NONE_DISCOUNT: break } fee = movie.getFee().minus(discountAmount).times(audienceCount)
  • 101.
    after class ReservationAgency { funcreserve(screening : Screening, customer: Customer, audienceCount: Int) -> Reservation { let fee = screening.calculateFee(audienceCount) return Reservation(custom, screening, fee, audienceCount) } }
  • 102.
    exception class PeriodCondition :DiscountCondition { private let dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date init(dayOfWeek: DayOfWeek, startTime: DateTime, endTime: DateTime) { self.dayOfWeek = dayOfWeek self.startTime = startTime self.endTime = endTime } func isSatisfied(by screening: Screening) -> Bool { return dayOfWeek.equals(screening.whenScreened.dayOfWeek) && startTime.compare(to: screening.whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: screening.whenScreended.toLocalTime() >= 0) } } class PeriodCondition : DiscountCondition { private let dayOfWeek : DayOfWeek private let startTime : Date private let endTime : Date // func isSatisfied(by screening: Screening) -> Bool { return screening.isDiscountable(dayOfWeek: dayOfWeek, startTime: startTime, endTime: endTime) } } extension Screening { func isDiscountable(dayOfWeek: DayOfWeek, startTime: DateTime, endTime: DateTime) -> Bool { return dayOfWeek.equals(whenScreened.dayOfWeek) && startTime.compare(to: whenScreended.toLocalTime() <= 0) && endTime.isAfter(to: whenScreended.toLocalTime() >= 0) } }
  • 103.