A Swift introduction

Since its initial release in 2014 and subsequent open-sourcing in 2015 Swift has become one of the most popular programming languages in the world — used everywhere from mobile to Macs to microservices. We will examine the various similarities and differences between Swift and other languages, and take a peek at the unique community that has formed around it.

Transcript

1. a Swift introduction by @neilkimmett
2. What is ?
4. func move(from start: Point, to end: Point) -> Distance
5. func move(from start: Point, to end: Point) -> Distance player.move(from: here, to: there)
6. let names: [String] = ["Jeff", "Samantha", "T-Pain"]
7. let names: [String] = ["Jeff", "Samantha", "T-Pain"] names.map({ (string: String) in return string.appending(" is super cool!") })
8. let names: [String] = ["Jeff", "Samantha", "T-Pain"] names.map({ (string: String) in return string.appending(" is super cool!") })
9. let names = ["Jeff", "Samantha", "T-Pain"] names.map({ (string: String) in return string.appending(" is super cool!") })
10. let names = ["Jeff", "Samantha", "T-Pain"] names.map({ (string: String) in return string.appending(" is super cool!") })
11. let names = ["Jeff", "Samantha", "T-Pain"] names.map({ string in return string.appending(" is super cool!") })
12. let names = ["Jeff", "Samantha", "T-Pain"] names.map { string in return string.appending(" is super cool!") }
13. let names = ["Jeff", "Samantha", "T-Pain"] names.map { $0.appending(" is super cool!”) }
14. class Person { }
15. class Person { var name: String let dateOfBirth: Date }
16. class Person { var name: String let dateOfBirth: Date init(dateOfBirth: Date, name: String) { self.dateOfBirth = dateOfBirth self.name = name } }
17. class Person { var name: String let dateOfBirth: Date init(dateOfBirth: Date, name: String) { self.dateOfBirth = dateOfBirth self.name = name } func dayOfBirth() -> DayOfWeek { return … } }
18. struct Date { … }
19. struct DateFormatter { }
20. struct DateFormatter { let format: String }
21. struct DateFormatter { let format: String func date(from string: String) -> Date }
22. func date(from string: String) -> Date { … return nil } ?
23. let userInput = "1989-08-27"
24. let userInput = "1989-08-27" let formatter = DateFormatter(format: "YYYY-MM-DD")
25. let userInput = "1989-08-27" let formatter = DateFormatter(format: "YYYY-MM-DD") let maybeDate = formatter.date(from: userInput)
26. let userInput = "1989-08-27" let formatter = DateFormatter(format: "YYYY-MM-DD") let maybeDate = formatter.date(from: userInput) if let date = maybeDate { … }
27. enum DayOfWeek { }
28. enum DayOfWeek { case Mon, Tue, Wed, Thu, Fri, Sat, Sun }
29. enum DayOfWeek { case Mon, Tue, Wed, Thu, Fri, Sat, Sun func isWeekend() -> Bool { switch self { case .Mon, .Tue, .Wed, .Thu, .Fri return false case .Sat, .Sun return true } }
30. let maybeDate = formatter.date(from: string) if let date = maybeDate { let person = Person(dateOfBirth: date, name: name) if person.dayOfBirth().isWeekend() { … } }
31. swift.org github.com/apple/swift
32. github.com/apple/swift-evolution/
33. Kitura Vapor
34. Thanks! from @neilkimmett HARRY’S.com