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Discussion on: Swift 5. What is new?

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Eljay-Adobe

Swift 1.x to 2.0 was a major change. (I'd call 1.x alpha quality.)

Swift 2.0 to 3.0 was also a major change. (I'd call 2.0 beta quality.)

Swift 3.0 to 4.0 to 4.1 to 4.2 to 5 all seem like minor fit-and-finish changes. To me, this is a good thing. The language is settled, mature. Literature on 3.0 is probably entirely or nearly entirely applicable to 5.