Swift nesting functions

Functions can be defined in other functions as nested functions

Func caculate (opr:string)-(int,int)->int {

Func Add (A:int, b:int), Int {

Return a + b

}

Func Sub (a:int,b:int), Int {

Return A-B

}

var result: (int,int)-Int

Switch opr{

Case "+":

result = Add

Case "-":

result = Sub

Default

result = Add

}

return result

}

Let F1:(int,int)->int = caculate ("+")

println (F1)

Let F2:(int,int)->int = Caculate ("-")

println (F2 (10,2))

This article is from the "Ordinary Road" blog, please be sure to keep this source http://linjohn.blog.51cto.com/1026193/1620375

Swift nesting functions