411 REFERENCE · Wikibooks
99 Elm Problems/Problem 14
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Duplicate each element of a list.
import Html exposing (text)
import List
duplicate : List a -> List a
-- your implementation goes here
main =
text <| toString <|
duplicate [1, 2, 3, 5, 8, 8]
Result:
[1, 1, 2, 2, 3, 3, 5, 5, 8, 8, 8, 8]
Solutions