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Swift学习小结之泛型,
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import UIKit
var str = "Hello,playground"
//泛型
func repeat<ItemType>(item : ItemType,times:Int)->ItemType[]{
var result = ItemType[]()
for i in 0..times{
result += item
}
return result
}
repeat("knock",4)
enum OptionalValue<T>{
case None
case Some(T)
}
var possibleInteger : OptionalValue<Int> = .None
possibleInteger = .Some(100)
func anyComminElements<T,U where T: Sequence,U : Sequence,T.GeneratorType.Element: Equatable,t.GeneratorType.Elment == U.GeneratorType.Element> (1hs:T,rhs :U)->Bool{
for ihsItem in ihs {
for rhsItem in rhs {
if ihsItem == rhsItem {
return true
}
}
}
return false
}
anyComminElements([1,2,3],[3])
<T: Equatable>
<T where T: Equatable>
原文链接:https://www.f2er.com/swift/327547.html