Question

在index-dev.html中，我加载了一个本地JavaScript文件：

<script type="text/javascript" src="map.js"></script>

map.js结构上（不是字面意思）看起来像这样：

var a2b = {
  "a": "My life closed twice before its close—",
  "b": "It yet remains to see",
  "c": "If Immortality unveil",
  "d": "A third event to me",

  "e": "So huge, so hopeless to conceive",
  "f": "As these that twice befell.",
  "g": "Parting is all we know of heaven,",
  "h": "And all we need of hell.",

  "z": "Emily Dickinson, 1830-1886"
}

我想出了如何将这个对象加载到Scala.js中：

val a2b = js.Dynamic.global.a2b

现在a2b的类型为Dynamic。我想要的是Map[String,String]。

我试过了：

val a2b = js.Dynamic.global.a2b.asInstanceOf[Map[String,String]]

但这不起作用。我该怎么做才能获得Map[String,String]？

Answer 1

关键是它不是一个Map，这就是它无法正常工作的原因。但是js.Dictionary。因此，请将其用于asInstanceOf，如果您确实需要Scala Map，请使用toMap函数：

val a2b = js.Dynamic.global.a2b.asInstanceOf[js.Dictionary[String]].toMap

如何将JavaScript对象转换为Map [String，String]？

1 个答案: