comparing single line if-then-else for elm-format

README.md

All examples from a 20k LOC Elm code base that has been in production for 2 years now.

better.elm

{- 
  Examples which I think are improved by single-line formatting of `if-then-else`
-}

-- status quo
viewSave { isSaving } =
    div []
        [ button
            [ onClick Save, disabled isSaving ]
            [ text <|
                if isSaving then
                    "Saving..."

                else
                    "Save"
            ]
        ]

-- single-line
viewSave { isSaving } =
    div []
        [ button
            [ onClick Save, disabled isSaving ]
            [ text (if isSaving then "Saving..." else "Save")
            ]
        ]



-- status-quo
viewFeedbackPicker suggestions =
    let
        prompt =
            "or pick one..."

        toFeedback label =
            if label == prompt then
                ""

            else
                label
    in
        Util.Html.dropdown prompt
            (prompt :: suggestions)
            toFeedback


-- single-line
viewFeedbackPicker suggestions =
    let
        prompt =
            "or pick one..."

        toFeedback label =
            if label == prompt then "" else label
    in
        Util.Html.dropdown prompt
            (prompt :: suggestions)
            toFeedback

worse.elm

{- 
  Examples which I think are made worse (or not much better) by single-line formatting of `if-then-else`
-}


-- status-quo
adjustSelection index =
    if index == numScreens - 1 then
        index - 1

    else
        index

-- single-line
adjustSelection index =
    if index == numScreens - 1 then index - 1 else index



-- status-quo
themeSelector index =
    if index == model.currentScreenIndex then
        "btn-success"

    else
        "btn-default"


-- single-line
themeSelector index =
    if index == model.currentScreenIndex then "btn-success" else "btn-default"