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Olivier Van hamme
5,418 PointsOutdated error message : String does not conform to Sequence protocol .
This code works in my Xcode Playground . However , Treehouse does not accept this code . Their error message says that String — referring to oldString in my for loop — does not conform to the Sequence type . This is incorrect because — as of 2019 — String automatically conforms to the Sequence protocol . You can try this out by looping through a String — e.g. "hello world" — and printing out every character .
// Enter your code below
extension String {
func transform(_ operation: (String) -> String) -> String {
return operation(self)
} // END func transform(_ operation: (String) -> String) -> String {}
} // END extension String {}
func removeVowels(from oldString: String) -> String {
var newString: String = ""
for character in oldString {
switch character {
case "a" , "e" , "i" , "o" , "u" : break
case "A" , "E" , "I" , "O" , "U" : break
default : newString.append(character)
} // END switch character {}
} // END for character in oldString {}
return newString
} // END func removeVowels(from oldString: String) -> String {}
1 Answer
Olivier Van hamme
5,418 PointsRESOLVED : Adding the depreciated .characters property to oldString — in my for loop — throws me an error in my Playground , but it has given me a pass over here , in the Treehouse code editor .