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
   

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2. What is ?
   

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4. func move(from start: Point, to end: Point) -> Distance
   

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5. func move(from start: Point, to end: Point) -> Distance
   player.move(from: here, to: there)
   

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6. let names: [String] = ["Jeff", "Samantha", "T-Pain"]
   

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7. let names: [String] = ["Jeff", "Samantha", "T-Pain"]
   names.map({ (string: String) in
   return string.appending(" is super cool!")
   })
   

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8. let names: [String] = ["Jeff", "Samantha", "T-Pain"]
   names.map({ (string: String) in
   return string.appending(" is super cool!")
   })
   

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9. let names = ["Jeff", "Samantha", "T-Pain"]
   names.map({ (string: String) in
   return string.appending(" is super cool!")
   })
   

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10. let names = ["Jeff", "Samantha", "T-Pain"]
    names.map({ (string: String) in
    return string.appending(" is super cool!")
    })
    

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11. let names = ["Jeff", "Samantha", "T-Pain"]
    names.map({ string in
    return string.appending(" is super cool!")
    })
    

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12. let names = ["Jeff", "Samantha", "T-Pain"]
    names.map { string in
    return string.appending(" is super cool!")
    }
    

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13. let names = ["Jeff", "Samantha", "T-Pain"]
    names.map { $0.appending(" is super cool!”) }
    

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14. class Person {
    }
    

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15. class Person {
    var name: String
    let dateOfBirth: Date
    }
    

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16. class Person {
    var name: String
    let dateOfBirth: Date
    init(dateOfBirth: Date, name: String) {
    self.dateOfBirth = dateOfBirth
    self.name = name
    }
    }
    

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17. class Person {
    var name: String
    let dateOfBirth: Date
    init(dateOfBirth: Date, name: String) {
    self.dateOfBirth = dateOfBirth
    self.name = name
    }
    func dayOfBirth() -> DayOfWeek {
    return …
    }
    }
    

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18. struct Date {
    …
    }
    

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19. struct DateFormatter {
    }
    

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20. struct DateFormatter {
    let format: String
    }
    

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21. struct DateFormatter {
    let format: String
    func date(from string: String) -> Date
    }
    

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22. func date(from string: String) -> Date {
    …
    return nil
    }
    ?
    

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23. let userInput = "1989-08-27"
    

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24. let userInput = "1989-08-27"
    let formatter = DateFormatter(format: "YYYY-MM-DD")
    

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25. let userInput = "1989-08-27"
    let formatter = DateFormatter(format: "YYYY-MM-DD")
    let maybeDate = formatter.date(from: userInput)
    

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26. let userInput = "1989-08-27"
    let formatter = DateFormatter(format: "YYYY-MM-DD")
    let maybeDate = formatter.date(from: userInput)
    if let date = maybeDate {
    …
    }
    

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27. enum DayOfWeek {
    }
    

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28. enum DayOfWeek {
    case Mon, Tue, Wed, Thu, Fri, Sat, Sun
    }
    

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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
    }
    }
    

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30. let maybeDate = formatter.date(from: string)
    if let date = maybeDate {
    let person = Person(dateOfBirth: date, name: name)
    if person.dayOfBirth().isWeekend() {
    …
    }
    }
    

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31. swift.org github.com/apple/swift
    

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32. github.com/apple/swift-evolution/
    

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33. Kitura Vapor
    

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34. Thanks!
    from @neilkimmett
    HARRY’S.com
    

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