I'm working on migrating from Swift 2.3 to Swift 3.0. Sometimes I can't get as much info about a change as I like. I'm aware of the swift-evolution github repo and can search that. Swift.org's migration guide is also really helpful.
I'm now trying to find why, along with changing from NSCalendar to Calendar, the .components are optional. I can't find any mention of it, and I'm not sure in what situation minutes or hours could be nil and how I should guard against it. Is there a way to search the evolution mailing list, or is there a better place to search?
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