On Wed, Jun 7, 2017 at 7:35 PM, Adam Sharp via swift-evolution < [email protected]> wrote:
> The new smart key path feature is really lovely, and feels like a great > addition to Swift. > > It seems like it might be straightforward to add overloads of `map` and > `flatMap` to the standard library to make use of the new functionality: > > let managers = flatOrganisation.managers > let allEmployees = Set(managers.flatMap(\.directReports)) > let employeeNames = Set(allEmployees.map(\.name)) > > This feels like a really natural way of working with key paths in a > functional style. It makes a lot of sense for collections, and possibly for > Optional too (although as far as I can see optional chaining is more or > less equivalent, and with more compact syntax). > > I’m hoping that this might be low-hanging fruit that could be considered > for the Swift 4 release. I’d be happy to have a go at writing a proposal if > there’s interest! > > –Adam > +1, it seems like a wonderful addition that would make a lot of code much shorter. -- Víctor Pimentel
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