> On Feb 16, 2017, at 5:32 PM, David Sweeris via swift-evolution > <swift-evolution@swift.org> wrote: > > >> On Feb 16, 2017, at 5:17 PM, Ben Cohen <ben_co...@apple.com >> <mailto:ben_co...@apple.com>> wrote: >> >> The win with mapping only the values is that the underlying hash table can >> retain the same physical layout, just with different values in the slots, so >> it can be done faster. > > Only if the mapped dictionary’s values are the same type (or at least the > same size) as in the original dictionary, right? Would the proposed function > allow you to mapValues from a [K:V] to a [K:T]?
In both cases the key/bucket structure would be the same, I believe. Slava > > - Dave Sweeris > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution
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