> Le 16 nov. 2017 à 11:06, Brent Royal-Gordon via swift-evolution > <swift-evolution@swift.org> a écrit : > >> On Nov 15, 2017, at 4:36 PM, Greg Parker via swift-evolution >> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: >> >> "compactMap" is okay if "compact" is added. Is "compact" a common enough >> operation in practice to pull its own weight? > > Lines containing code like `flatMap { $0 }`—which could be compacting > optionals or flattening nested sequences—appear 89 times in the source > compatibility suite. (I happen to have it on my hard drive right now.) > > My main concern about adding a compacting method is…well, am I missing a > better implementation than the slightly gross one I cooked up in a playground > just now? > > protocol _OptionalProtocol { > associatedtype _Wrapped > var _optional: _Wrapped? { get } > }
Welcome to the club :-) https://github.com/search?q=OptionalProtocol+language%3Aswift&type=Code&utf8=✓ Gwendal
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