Generating random alphanumeric string in Swift

Hello everyone! I'm writing an iOS app in Swift, and I need to generate random strings consisting of letters (Latin, both cases) and digits. For example, to create unique identifiers or temporary passwords. I'm a beginner, and my current implementation looks like this: ```swift let letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" var randomString = "" for _ in 0..<10 { let randomIndex = Int(arc4random_uniform(UInt32(letters.count))) randomString.append(letters[letters.index(letters.startIndex, offsetBy: randomIndex)]) } print(randomString) ``` This works, but I feel the code is cumbersome and not very "Swifty". First, `arc4random_uniform` is deprecated in Swift 4.2+, and Xcode gives a warning. Second, constantly calculating the index via `inde