> Moreover, I find it far cleaner to use the where clause that having to > remember than I have to use the lazy accessor to avoid a performance hit.
See the benchmarks me and Erica have posted here a few days back - even with the lazy accessor, if you decided to use filter(_:), you lost 10+% of performance. Correct way to do this without `where` and without performance penalization is to use guard within the for-in loop. > >> Le 13 juin 2016 à 06:39, Charlie Monroe via swift-evolution >> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> a écrit : >> >>> And to follow-up to myself once again, I went to my "Cool 3rd Party Swift >>> Repos" folder and did the same search. Among the 15 repos in that folder, a >>> joint search returned about 650 hits on for-in (again with some false >>> positives) and not a single for-in-while use. >>> >>> -- E >> >> Not to undermine this fact, but I believe the fact that `where` can be used >> in a for loop is not widely known. I didn't know about it until about a >> month ago (haven't really read much docs, but most people don't either). >> >> But after I found out about it, I started using it and it IMHO improved >> readability of my code. Not by much, but it's the little things that make >> you smile, right? >> >> Many people here argument that `where` is a Swift speciality and needs to be >> learned by the developer - the alternative is to teach the person what's the >> proper alternative - that using .filter can have performance impact and that >> the *correct* way is to use guard within the for loop. And that's IMHO much >> worse than teaching a person about using `where` within a for loop. >> >>> _______________________________________________ >>> swift-evolution mailing list >>> swift-evolution@swift.org <mailto:swift-evolution@swift.org> >>> https://lists.swift.org/mailman/listinfo/swift-evolution >>> <https://lists.swift.org/mailman/listinfo/swift-evolution> >> _______________________________________________ >> swift-evolution mailing list >> swift-evolution@swift.org <mailto:swift-evolution@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-evolution > > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution
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