Elm Compiler when trying to append to a new list

Elm Append List

The 1st argument to function `append` is causing a mismatch.

5|            List.append "black" fishes
                          ^^^^^^^
Function `append` is expecting the 1st argument to be:

    List a

But it is:

    String


> moreFish = List.append fishes "black"
-- TYPE MISMATCH --------------------------------------------- repl-temp-000.elm

The 2nd argument to function `append` is causing a mismatch.

5|            List.append fishes "black"
                                 ^^^^^^^
Function `append` is expecting the 2nd argument to be:

    List String

But it is:

    String

Hint: I always figure out the type of arguments from left to right. If an
argument is acceptable when I check it, I assume it is "correct" in subsequent
checks. So the problem may actually be in how previous arguments interact with
the 2nd.


> moreFish = List.append fishes ["black"]
["red","blue","green","black"] : List String