swift - Is there some short cut form of writing: .map { $0 }

Question

.map { $0 }

I feel like it should be possible to write as just:

.map()

or something

Or real world example:

let values = Dict<String: [Int]>(some data here).values.flatMap { $0 }

Answer 1

Yes you can actually use flatMap and pass value as the keypath:

let dict: [String: [Int]] = ["a": [1,2,3]]
let values = dict.flatMap(.value)   // [1, 2, 3]