在榆树中赋值

Question

这真是一个菜鸟问题，很抱歉，我在互联网上搜索找不到答案。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。但是我遇到了编译错误：

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

您只需要在此处写入模型的新值即可。在这种情况下，那只是 0:

Reset ->
  0

在榆树中赋值

Assign a value in elm

elm