Ive got solution working in my sandbox however it wont pass through compiler error here in code challenge

Question

The error says String has no member "contains", I tried the older Swift range(of: prefix) and same error. 
the attached code is working in sandbox 
protocol PrefixContaining {
  func hasPrefix(_ prefix: String) -> Bool
}
extension String: PrefixContaining {
  func hasPrefix(_ prefix: String) -> Bool {
    if (self.contains(prefix)) {
      return true
    }
    return false
  }
}
// Enter code below
extension Array where Element: PrefixContaining {
  func filter(byPrefix prefix: String) -> [Element] {
    var result: [Element] = []
    for (_, element) in self.enumerated() {
      if element.hasPrefix(prefix) {
        result.append(element)
      }
    }
    return result
  }
}
var myArray = ["abnmmm", "nsbf", "sdfsdf", "absmdnfsdf"]
myArray.filter(byPrefix: "ab")

Stanislav Zaichenko · Answer

Just found my mistake, no need for implementing hasPrefix since String has already got it.

Welcome to the Treehouse Community

Looking to learn something new?

Stanislav Zaichenko

Stanislav Zaichenko

Ive got solution working in my sandbox however it wont pass through compiler error here in code challenge

1 Answer

Stanislav Zaichenko

Stanislav Zaichenko