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therealbnut/RemoveDuplicatesMatchingAll.swift

Last active June 13, 2021 14:45
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RemoveDuplicatesMatchingAll.swift
func keys_equal<T, U:Equatable>(_ keypath: Keypath<T,U>) -> (T,T) -> Bool {
return { $0[keypath: keypath] == $1[keypath: keypath] }
}
@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
extension Publisher {
    func removeDuplicates(matchingAll predicates: @escaping (Output, Output) -> Bool...)
        -> Publishers.RemoveDuplicates<Self>
    {
        return self.removeDuplicates { lhs, rhs in
            predicates.allSatisfy { $0(lhs, rhs) }
        }
    }
}
publisher.removeDuplicates(matchingAll: keys_equal(\.foo), keys_equal(\.bar))
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