> On Jan 2, 2018, at 11:57 PM, Ben Cohen <ben_co...@apple.com> wrote: > > I think this is a perfect case for an addition to the existing Lazy suite > (and IMO would make a good evolution proposal too, as this kind of “chunked” > splitting is a useful feature). You’re right though, there isn’t a good guide > out there for how to do this (calling any intrepid blogger who wants to write > one…) > > Here’s a sketch of how it would fit into lazy. This is with the latest > toolchain from master, which makes things a LOT easier now that IndexDistance > is dead. It’s slightly inefficient because it re-uses Index from Base for its > index, it would be more efficient to use a start/end pair for the chunks but > that’s a lot more code :) > > What’s also interesting is you could (with conditional conformance now that’s > landed) make it a RandomAccessCollection if the base were random access, but > not if the base is bidirectional, because you need to be able to calculate > the size of the last element in constant time.
I got a trial at <https://github.com/CTMacUser/SectionedSequences>. — Daryle Walker Mac, Internet, and Video Game Junkie darylew AT mac DOT com
_______________________________________________ swift-users mailing list swift-users@swift.org https://lists.swift.org/mailman/listinfo/swift-users
