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Mathew Polzin
13 lines
371 B
Swift
13 lines
371 B
Swift
//
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// Optional+ZipWith.swift
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//
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// Created by Mathew Polzin on 1/19/19.
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//
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/// Zip two optionals together with the given operation performed on
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/// the unwrapped contents. If either optional is nil, the zip
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/// yields nil.
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func zip<X, Y, Z>(_ left: X?, _ right: Y?, with fn: (X, Y) -> Z) -> Z? {
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return left.flatMap { lft in right.map { rght in fn(lft, rght) }}
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}
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