O'Reilly logo

Swift Functional Programming - Second Edition by Dr. Fatih Nayebi

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

<|? operator

The <|? operator is used to decode an optional value at the specified key path into the requested type:

public func <|? <A: Decodable>(json: JSON, keys: [String]) -> Decoded<A?> where A == A.DecodedType {   switch flatReduce(keys, initial: json, combine: decodedJSON) {   case .failure: return .success(.none)   case .success(let x): return A.decode(x) >>- {           .success(.some($0)) }   } } 

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required