Swift 4 is an incremental release of Swift: a tock in Apple’s usual tick-tock release cycle, where the tick is a major release and the tock is a follow-up release with bug fixes and some additions and improvements. Two of the biggest additions to Swift 4 are the
Encodable protocols, which together form the
Codable protocol. These protocols allow you, with just a bit of configuration, to define, encode, and decode JSON objects, a task that you either previously did on your own or used a library to accomplish.
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