Usage of String.range in Swift 3.0

Question

let us = "http://example.com"
let range = us.rangeOfString("(?<=://)[^.]+(?=.com)", options:.RegularExpressionSearch)
if range != nil {
    let found = us.substringWithRange(range!)
    print("found: \(found)") // found: example
}

This code extracts substring between backslashes and dot com in Swift 2. I searched Internet and I found that rangeOfString changed to range().

But still I could not make the code work in Swift 3.0. Could you help me ?

edit : I'm using swift 3 07-25 build.

Answer 1

In swift 3.0 rangeOfString syntax changed like this.

let us = "http://example.com"
let range = us.range(of:"(?<=://)[^.]+(?=.com)", options:.regularExpression)
if range != nil {
     let found = us.substring(with: range!)
     print("found: \(found)") // found: example
}