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InsertNetan/Scanl1.swift

Created June 25, 2016 13:32
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Scanl1.swift
// same as scanl but without initial
extension Array {
func scanl(combine: (Element, Element) -> Element) -> [Element] {
guard let first = self.first else { return [] }
return Array(self.dropFirst()).scanl(initial:first, combine:combine)
}
}
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