Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Closures in Swift First Class Functions Higher Order Functions

get no idea why I can't pass it

no idea

functions.swift
// Enter your code below

extension String {

    func transform(_ aString: (String) -> String ) -> String {
        func removeVowels(from string: String) -> String {
            var newString = ""
            for character in string.characters {
                if ["a","e","i","o","u"].contains(character) {

                    newString.append(character)
                }


            }

            return newString
        }

        return(aString(self))
    }
}

2 Answers

Simon Di Giovanni
Simon Di Giovanni
8,429 Points

Hi John

Your code is fine, just take the function removeVowels out of the transform function, and put it directly into the extension. Try the below code to check if it works.

extension String {

    func transform(_ aString: (String) -> String ) -> String {
        return(aString(self))
    }


    func removeVowels(from string: String) -> String {
        var newString = ""
        for character in string.characters {
            if ["a","e","i","o","u"].contains(character) {
                newString.append(character)
            }
    }
}

thks Simon it works!