[英]Swift Combine: Unexpected backpressure behaviour with zip operator
[英]Swift Combine: no `distinct` operator?
.removeDuplicates()等價於.distinctUntilChanged()
您可以執行以下操作來獲取.distinct() 。
@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
extension Publisher where Self.Output : Equatable {
public func distinct() -> AnyPublisher<Self.Output, Self.Failure> {
self.scan(([], nil)) {
$0.0.contains($1) ? ($0.0, nil) : ($0.0 + [$1], $1)
}
.compactMap { $0.1 }
.eraseToAnyPublisher()
}
}
嗯,我真傻,有一個叫做RemoveDuplicates
,它鏈接到方法removeDuplicates()
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