Code Snippet: Check if String Begins with Prefix and Retrieve Remainder

Within these castle walls be forged Mavens of Computer Science ...

— Merlin, The Coder

Swift

let s = "Alpha:Bravo:Charlie:Delta"  

let alpha = "Alpha:"                                                                                                                                                                                     
print(s.starts(with:alpha))                                                                                                                                                                              
print(s.dropFirst(alpha.count))