Javascript 对象枚举语法

Question

我有这个对象:

var State = {
  WAITING: 1,
  READY: 2
}

这个对象用于获取状态文本:

var Language = {
  States: {
    WAITING: "Waiting..",
    READY: "Ready!"
  }
}

我想直接从状态获取文本，如下所示:

var state = State.READY;

var statusText = Language.States[state];

为了让它工作，我需要类似这样的非法语法:

var Language = {
  States: {
    State.WAITING: "Waiting..",
    State.READY: "Ready!"
  }
}

但这不起作用，我可以使用什么来简单地从状态变量中获取文本？

Answer 1

不，你不知道。只要让你的值(value)观合理，而不是神奇的数字。在这种情况下，让它们使用映射到其他对象使用的键名称的字符串，然后完成:

var States = {
  WAITING: "WAITING",
  READY: "READY"
}

var Language = {
  States: {
    WAITING: "Waiting..",
    READY: "Ready!"
  }
}

瞧:

var state = States.WAITING;
var label = Language.States[state]

如果这些状态数字有意义，那么也查找它们:

var responseCodes = {
  "0": "WAITING",
  "1": "READING",
  "403": "FORBIDDEN",
  ...
}

然后链接你的查找:

...
var responseCode = whatever();
var state = responseCodes[responseCode];
var label = Language.State[state];
...