“func​ ​minMax​(​array​: [​Int​]) -> (​min​: ​Int​, ​max​: ​Int​) { ​    ​var​ ​currentMin​ = ​array​[​0​] ​    ​var​ ​currentMax​ = ​array​[​0​] ​    ​for​ ​value​ ​in​ ​array​[​1​..<​array​.​count​] { ​        ​if​ ​value​ < ​currentMin​ { ​            ​currentMin​ = ​value ​        } ​else​ ​if​ ​value​ > ​currentMax​ { ​            ​currentMax​ = ​value ​        } ​    } ​    ​return​ (​currentMin​, ​currentMax​) ​}”  抜粋：: Apple Inc. “The Swift Programming Language”。 iBooks. https://itun.es/cn/jEUH0.l