elm - 在 elm 中赋值

Question

这是一个非常菜鸟的问题，很抱歉，但我在互联网上的搜索无法找到答案。我有以下代码:

-- MODEL

type alias Model = Int

model : Model
model =
  0


-- UPDATE

type Msg = Increment | Decrement | Reset

update : Msg -> Model -> Model
update msg model =
  case msg of
    Increment ->
      model + 1

    Decrement ->
      model - 1
    Reset ->
      model = 0

我正在尝试实现将模型值设置为 0 的重置。但我收到一个编译错误:

The = operator is reserved for defining variables. Maybe you want == instead? Or maybe you are defining a variable, but there is whitespace before it?

请帮忙!

Answer 1

您只需要在那里写入模型的新值。在这种情况下，这只是 0 :

Reset ->
  0