replacingOccurrences error

Question

From udacity course I am trying below code

 let password = "Meet me in St. Louis"
 let newPassword = password.replacingOccurrences(of: "e", with: "3")

This is giving

Playground execution failed: Introduction.xcplaygroundpage:31:19: error: value of type 'String' has no member 'replacingOccurrences'
let newPassword = password.replacingOccurrences(of: "e", with: "3")
              ^~~~~~~~ ~~~~~~~~~~~~~~~~~~~~

Forcefully I have to use

let password = "Meet me in St. Louis"
let newPassword = password.stringByReplacingOccurrencesOfString("me", withString: "ss")

Any clue why this error coming? I am using swift version 2.2

Answer 1

In case you run this code example from the command line (by running Swift REPL), add import Foundation at the beginning of your .swift file.