func move(from start: Point, to end: Point) -> Distance
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func move(from start: Point, to end: Point) -> Distance
player.move(from: here, to: there)
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let names: [String] = ["Jeff", "Samantha", "T-Pain"]
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let names: [String] = ["Jeff", "Samantha", "T-Pain"]
names.map({ (string: String) in
return string.appending(" is super cool!")
})
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let names: [String] = ["Jeff", "Samantha", "T-Pain"]
names.map({ (string: String) in
return string.appending(" is super cool!")
})
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let names = ["Jeff", "Samantha", "T-Pain"]
names.map({ (string: String) in
return string.appending(" is super cool!")
})
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let names = ["Jeff", "Samantha", "T-Pain"]
names.map({ (string: String) in
return string.appending(" is super cool!")
})
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let names = ["Jeff", "Samantha", "T-Pain"]
names.map({ string in
return string.appending(" is super cool!")
})
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let names = ["Jeff", "Samantha", "T-Pain"]
names.map { string in
return string.appending(" is super cool!")
}
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let names = ["Jeff", "Samantha", "T-Pain"]
names.map { $0.appending(" is super cool!”) }
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class Person {
}
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class Person {
var name: String
let dateOfBirth: Date
}
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class Person {
var name: String
let dateOfBirth: Date
init(dateOfBirth: Date, name: String) {
self.dateOfBirth = dateOfBirth
self.name = name
}
}
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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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struct Date {
…
}
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struct DateFormatter {
}
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struct DateFormatter {
let format: String
}
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struct DateFormatter {
let format: String
func date(from string: String) -> Date
}
let userInput = "1989-08-27"
let formatter = DateFormatter(format: "YYYY-MM-DD")
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let userInput = "1989-08-27"
let formatter = DateFormatter(format: "YYYY-MM-DD")
let maybeDate = formatter.date(from: userInput)
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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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enum DayOfWeek {
}
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enum DayOfWeek {
case Mon, Tue, Wed, Thu, Fri, Sat, Sun
}
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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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let maybeDate = formatter.date(from: string)
if let date = maybeDate {
let person = Person(dateOfBirth: date, name: name)
if person.dayOfBirth().isWeekend() {
…
}
}