编辑代码

let names :[String] = ["Chris", "Alex", "Ewa", "Barry", "Daniella"]
let reversedNames1 = names.sorted(by : <)
let reversedNames2 = names.sorted { $0 < $1 }
print(reversedNames1)
print(reversedNames2)

let numsdata : [Int:String] = [0:"零",1:"壹",2:"贰",3:"叁",4:"肆",5:"伍",6:"陆",7:"柒",8:"捌",9:"玖"]
//print(numsdata[0]!)
let transverter = { (input:Int) -> Void in  if input >= 0 && input <= 9
                                                { if let num = numsdata[input]{print(num)}
                                                  else{print("nil")}
                                                }
                                            else{print("请输入1到9的数字!")}}
transverter(2)
transverter(3)
transverter(9)
transverter(6)
transverter(8)
transverter(18)