编辑代码

/*{(参数)->返回值 in 
    内容
}*/
//闭包形式
let a = {(s1:String)->Void in 
    print(s1)
}
a("hi")
    //闭包全部形式
let b = {print("Again")}
b()
    //闭包最简形式
let divide = {(s1:Int, s2:Int)->Int in
    return s1/s2
}
print(divide(400,40))

//sorted是排序倒序
let names = ["AT","SE","D","S","BE"]
//var reversd = names.sorted(by:{s1,s2 in return s1 > s2})
//var reversd = names.sorted(by:{$0 > $1})
//var reversd = names.sorted(by: > )
var reversd = names.sorted{$0 > $1}
print(reversd)
print(names.sorted())