Read What’s new in Swift 5.0; Watched String Interpolation in Swift 5 (Part 2)

Watched String Interpolation in Swift 5 (Part 2).

Read What’s new in Swift 5.0:

• Result is now part of Swift bringing new features:
  • get() method either returning the successful value or throwing error
  • initializer accepting a throwing closure makes possible let r = Result { try String(contentsOfFile: f) }
  • general Error protocol could be used, rather than using Result<Int, NetworkError> could use Result<Int, Error>
• raw strings;
• customizable string interpolation bring absolutely crazy stuff. should experiment with it (TODO:);
• @dynamicCallable serves for Python or JavaScript bridging but could be used for creating some creasy stuff;
• @unknown for handling future enum cases;
• nested optionals resulting from try? are flattened;
• isMultiple(of:) for checks like rowNumber % 2 == 0;
• compactMapValues() in dictionaries for transforming values while keeping keys intact;
• count(where:) was discarded in betatesting, may be will return in later swift versions;

Other sources mention also:

• Conform Never to Equatable and Hashable;
• Add Unicode Properties to Unicode.Scalar isAlphabetic, isASCIIHexDigit and so on;
• Character Properties like isASCII;
• Add Codable conformance to Range types.

By the way, CHANGELOG is available!