UnfoldSequence to [UnfoldSequence.Iterator.Element]

UnfoldSequenceExtension.swift

extension UnfoldSequence {
    func toArray(filter : (UnfoldSequence.Iterator.Element) -> (Bool) ) -> [UnfoldSequence.Iterator.Element] {
        var arreglo = Array<UnfoldSequence.Iterator.Element>()
        for value in self {
            if !filter(value) { break }
            arreglo.append(value)
        }
        return arreglo
    }
}