如何在Elm中创建一个用于测试的Dict？

Question

要在 Elm 中创建一个列表，你可以这样做：

list = ["test","test2"]

但是我该如何创建一个用于测试的字典呢？

我已经阅读了Dict - core 3.0.0。

- Stanko

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我仍然建议您先阅读完整文档 :) - Philip Kamenarsky

Answer 1

让字典可变: let dict = Dict.fromList [("key1", "value1"), ("key2", "value2")]

要插入元素: let dict' = Dict.insert "key3" "value3" dict

要查找元素:

case Dict.get "key1" dict of
  Just value -> ... -- do something with value
  Nothing -> ... -- no such value in dict

- Philip Kamenarsky

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Dict.lookup 现在似乎被称为 Dict.get。http://package.elm-lang.org/packages/elm-lang/core/latest/Dict - Name McChange