How to read Swift

声に出して読みたいSwift

Transcript

1. SwiftͷಡΈํ ੠ʹग़ͯ͠ಡΈ͍ͨSwift
2. ࣗݾ঺հ • Yusuke Hosonuma • ޷͖ͳݴޠɿJavaɺScalaɺSwiftʁ • Qiitaɿqiita.com/YusukeHosonuma • झຯɿΞχϝͱ͔ݟ·͢ɻ߈֪ػಈୂͱ͔ɻ
3. ࠓ೔ͷςʔϚ
4. Swiftͬͯ ຊ౰ʹಡΈ΍͍͢ʁ
5. ຊ౰ʹʁ var name: String? var name: String! var name: String = userName ?? "Guest" func sum(number1 a:Int, number2 b:Int) -> Int { return a + b } fruits.sort({ (s1: String, s2: String) -> Bool in return s1 < s2 }) func say(greet: String) -> (String -> String) { func greet(name: String) -> String { return "\(greet), \(name)!" } return greet }
6. ׳ΕΔ·Ͱ͸ਏ͍
 ʢݸਓͷײ૝Ͱ͢ʣ
7. ͦΕͳΒ͹ ੠ʹग़ͯ͠ಡΜͰΈΑ͏ʂ
8. ੠ʹग़ͯ͠ಡΈ͍ͨ Swiftʢ͢͏͌;ͱʣ
9. Lesson1: ม਺ var name: String
10. Lesson1: ͜͏ಡΈ·͢ var name: String ᶃม਺ ᶄname͸ ᶅStringܕͰఆٛ͞ΕΔ ৭ΜͳॴͰ࢖ΘΕΔ ௒جຊܗʂ
11. Lesson2: Optional var name: String?
12. Lesson2: ͜͏ಡΈ·͢ var name: String? ᶃม਺ ᶄname͸ ᶅStringܕ ᶆͷOptionalܕͰఆٛ͞ΕΔ
13. Lesson3: ڧ੍Ξϯϥοϓܕ var name: String!
14. Lesson3: ͜͏ಡΈ·͢ var name: String! ᶃม਺ ᶄname͸ ᶅStringܕ ᶆͷOptionalܕ ᶇ͚ͩͲʂ ڧ੍తʹUnwrap͞ΕΔʂʂ
15. Lesson4: Nil Coalescing Operator var name: String = userName ?? "Guest"
16. Lesson4: ͜͏ಡΈ·͢ var name: String = userName ?? "Guest" ᶃม਺nameʹ ᶄuserNameʹ஋͕ೖͬͯͨΒ ᶅͦͷத਎ ᶆೖͬͯͳ͚Ε͹͜Ε ᶇΛ୅ೖ͢Δ
17. Lesson5: ϝιου func sayHello(name s:String) -> String { return “Hello, \(s)!” } sayHello(name: "Yusuke")
18. Lesson5: ͜͏ಡΈ·͢ func sayHello(name s:String) -> String { return “Hello, \(s)!” } sayHello(name: "Yusuke") ᶃϝιου ᶅStringܕͰఆٛ͞Εͨ ᶄsayHello͸ ᶆsͱ͍͏Ҿ਺Λड͚औΓ ᶇStringܕͷ݁ՌΛฦ͢ ᶈͪͳΈʹݺͼग़͢ͱ͖ʹ͸ nameͰࢦఆͯ͠΋Β͏
19. Lesson6: Ϋϩʔδϟ fruits.sort({ (s1: String, s2: String) -> Bool in return s1 < s2 })
20. Lesson6: ͜͏ಡΈ·͢ fruits.sort({ (s1: String, s2: String) -> Bool in return s1 < s2 }) ᶃsortʹ༩͑ΔΫϩʔδϟ{}͸ ᶄStringܕͷ(s1, s2)ΛҾ਺ʹड͚औΓ ᶅBoolܕΛฦ͢ ᶆͦͯ͠ ᶇ࣮ࡍͷॲཧ͸͜͏ͳΔ
21. ॓୊: ؔ਺Λฦؔ͢਺ func say(greet: String) -> (String -> String) { func greet(name: String) -> String { return "\(greet), \(name)!" } return greet } let sayHello = say("Hello") sayHello(name: "Hosonuma") sayHello(name: "Yusuke")
22. 5ճ͘Β͍੠ʹग़ͯ͠ ಡΜͰΈΕ͹
23. ͖ͬͱ͋ͳͨ΋Swift͕ ޷͖ʹͳͬͯ͘Δ͸ͣʂ
24. Let’s say Swift.
25. ͝੩ௌ͋Γ͕ͱ͏ ͍͟͝·ͨ͠ɻ