Nate Cook proposed merging dictionary initializers (with optional conflict resolution) to be added to the standard library:
SE-0100 Add sequence-based initializers and merge methods to Dictionary https://github.com/apple/swift-evolution/blob/master/proposals/0100-add-sequence-based-init-and-merge-to-dictionary.md Martin > On 11 Nov 2016, at 09:14, Ray Fix via swift-users <swift-users@swift.org> > wrote: > > Hi Mr Bee, > > The reason I don’t think it is provided is because it is difficult to know > what to do when keys collide. You could easily write such a thing and decide > your own policy. For example: > > let d1 = ["Apples": 20, "Oranges": 13] > let d2 = ["Oranges": 3, "Cherries": 9] > > extension Dictionary { > func merged(with another: [Key: Value]) -> [Key: Value] { > var result = self > for entry in another { > result[entry.key] = entry.value > } > return result > } > } > > let result = d1.merged(with: d2) > > >> On Nov 11, 2016, at 12:05 AM, Mr Bee via swift-users <swift-users@swift.org> >> wrote: >> >> Hi, >> >> I'm using Swift v3 on an El Capitan machine. I want to merge a dictionary >> into another compatible dictionary. However, I couldn't find addEntries >> function in the dictionary instance, like it was on NSMutableDictionary >> (https://developer.apple.com/reference/foundation/nsmutabledictionary). >> >> Does that mean that Swift standard library won't provide such similar >> function for native Swift dictionary? Or is there any other way of doing >> that natively? I mean using the built-in Swift's native dictionary function >> (https://developer.apple.com/reference/swift/dictionary), no need to write a >> custom function, or bridging to NSMutableDictionary. >> >> Thank you. >> >> Regards, >> >> –Mr Bee >> >> _______________________________________________ >> swift-users mailing list >> swift-users@swift.org >> https://lists.swift.org/mailman/listinfo/swift-users > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users _______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
