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3,471 PointsMake sure you're adding the filter(byPrefix:) function to the extension of Array
keep saying that even adding it
protocol PrefixContaining {
func hasPrefix(_ prefix: String) -> Bool
func filter(byPrefix prefix: String) -> [Element]
}
extension Array where Element: PrefixContaining {
var element: Array {Element.hasPrefix
return self
}
var string: String {Element.filter("a")
return [Element]
}
}