var string = "hello Swift" if string.rangeOfString("Swift") != nil{ println("exists") } // alternative: not case sensitive if string.lowercaseString.rangeOfString("swift") != nil { println("exists") }
let string2 = "Hello.World" let needle: Character = "." if let idx = find(string2, needle) { let pos = distance(string2.startIndex, idx) println("Found \(needle) at position \(pos)") } else { println("Not found") }