Consider the following code:
考虑下面的代码:
func f(dict: [String: AnyObject]) {
let x = dict["mykey"]?.integerValue
// Do something with x
}
func Consider the following code:
考虑下面的代码:
func f(dict: [String: AnyObject]) {
let x = dict["mykey"]?.integerValue
// Do something with x
}
func