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t.ae 7/5/2018 5:29 AM
optional周りの話もこのへんに書いてますね。 https://github.com/apple/swift-evolution/blob/master/proposals/0202-random-unification.md#choose-rangerandom-over-static-randomin
apple/swift-evolution
swift-evolution - This maintains proposals for changes and user-visible enhancements to the Swift Programming Language.
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5:30 AM
いや内容的には違う話かな