iOS
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Swift 6
Kodebits Day 21: Result Map Value
May 11 2026
Practice error handling with a short swift challenge.
What is the output?
enum E: Error { case bad }
let r = Result<Int, E>.success(8)
let v = r.map { $0 + 1 }
print(try? v.get())
Try it in the online Swift Playground →
[spoiler title="Solution"]
Answer:
Optional(9)
Explanation:
Result.map transforms the success value (8 becomes 9), leaving failure cases unchanged. The try? safely unwraps, returning Optional(9).
[/spoiler]