Okay, that does work for my example. But why wouldn’t the key also be available so that you might be able to have selective handling of first vs last for each key?
Gregg > On Jan 8, 2018, at 4:03 PM, Nate Cook <natec...@apple.com> wrote: > > Hi Gregg — > > The Dictionary(_:uniquingKeysWith:) initializer was added for this purpose in > Swift 4—please see > https://developer.apple.com/documentation/swift/dictionary/2892961-init > <https://developer.apple.com/documentation/swift/dictionary/2892961-init> > > Nate > >> On Jan 8, 2018, at 1:02 PM, Gregg Wonderly via swift-evolution >> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: >> >> In some dictionary implementations, key-value pairs are added with an add() >> method which disallows duplicate keys to be inserted with a runtime >> exception. Providing an additional method of set() allows for the ability >> to ignore duplicate keys so that it feels more like dict[key] = value. It >> might be interesting to provide this as a selectable behavior within an >> additional constructor's arguments. >> >> Dictionary(allowDuplicate: true, pairs: [("z", 1), ("z", 2), ("z", 3), ("z", >> 4)]) so that the dictionary behavior remains in line with the compile time >> checks. >> >> Gregg >> >> _______________________________________________ >> swift-evolution mailing list >> swift-evolution@swift.org <mailto:swift-evolution@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-evolution >
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