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

seems to be an issue with value.caracters

can't pass it

// Enter your code below

extension String {
func transform(_ character:(String) -> String) -> String {

func removeVowels(from value: String) -> String {
let vowels: [Character] = ["a", "e", "i", "o", "u"]
var newString: String = ""

for character in value.characters {
    if vowels.contains(character) {

return newString

return character(self)