jQuery Ajax:获取特定对象值 [英] jQuery Ajax: get specific object value

问题描述

我正在使用 Ajax 访问字典 REST API.

$.ajax({url: "http://api.wordnik.com//v4/word.json/cat/definitions?api_key=mykey&includeRelated=false&includeTags=false&limit=1",数据类型:'json'，成功:功能(数据){//成功时调用警报(数据.字)；},错误:函数(e){//出现错误时调用console.log(e.message);}});

回复:

<预><代码>[{"textProns": [],"sourceDictionary": "ahd-legacy","exampleUses": [],相关词汇": []，标签": []，引文":[]，"word": "猫","text": "一种小型食肉哺乳动物 (Felis catus 或 F.domesticus)，很早就被驯化为捕鼠器和宠物，并存在于几个独特的品种和品种中.",序列":0"，分数":0.0，"partOfSpeech": "名词","attributionText": "来自 The American Heritage® Dictionary of the English Language, 4th Edition"}]

在我的测试示例中，我在成功时收到警报 undefined.我看到的大多数 Ajax 示例都使用循环，但我返回了一个结果.如何从对象中提取 word 和 text 值?

解决方案

如您所见，您的回复以 [ 开头，以 ] 结尾.所以你的回应是一个数组.然后，在数组内部，您将获得对象(以 { 开头并以 } 结尾).所以你的 data 是一个数组，它可以用 data[x] 访问(x 是索引)，并且所选对象的每个成员都可以用 .点符号:.word、.text 等等.所以在你的情况下，如果只有一个结果，你可以做 data[0].word.

I'm accessing a dictionary REST API using Ajax.

$.ajax({
  url: "http://api.wordnik.com//v4/word.json/cat/definitions?api_key=mykey&includeRelated=false&includeTags=false&limit=1",
  dataType : 'json',
  success: function(data) {
    //called when successful
    alert(data.word);
  },
  error: function(e) {
    //called when there is an error
    console.log(e.message);
  }
});

The response:

[
  {
    "textProns": [],
    "sourceDictionary": "ahd-legacy",
    "exampleUses": [],
    "relatedWords": [],
    "labels": [],
    "citations": [],
    "word": "cat",
    "text": "A small carnivorous mammal (Felis catus or F. domesticus) domesticated since early times as a catcher of rats and mice and as a pet and existing in several distinctive breeds and varieties.",
    "sequence": "0",
    "score": 0.0,
    "partOfSpeech": "noun",
    "attributionText": "from The American Heritage® Dictionary of the English Language, 4th Edition"
  }
]

In my test example I get an alert undefined on success. Most Ajax examples I saw use loops but I'm returning one result. How can I extract the word and text values from the objects?

解决方案

As you can see your response starts with [ and ends with ]. So your response is an array. Then, inside the array, you get objects (starting with { and ending with }). So your data is an array, which can be accessed with data[x] (x being the index), and each member of the selected object can be accessed with the .dot notation: .word, .text etc. So in your case, if there's only one result, you can do data[0].word.

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