javascript - 使用未命名数组

Question

我正在调用 API 并成功取回这样的数组:

[ {
  "absmag" : "4.85",
  "speed" : "0",
  "colorb_v" : "0.65",
  "label" : "Sun",
  "appmag" : "-26.72",
  "distance_light_years" : "0",
  "id" : "53794",
  "hipnum" : "0",
  "vy" : "0",
  "updated_at" : "49:09.3",
  "vx" : "0",
  "vz" : "0",
  "texnum" : "1",
  "plxerr" : "0",
  "created_at" : "49:09.3",
  "plx" : "0",
  "dcalc" : "0",
  "z" : "0",
  "luminosity" : "0.8913",
  "y" : "0",
  "x" : "0"
}
 ]

如何引用这些行中的每一行？我想做类似的事情:

var database = xml.responseText;
console.log(database.label);

Answer 1

xml.responseText 是一个数组，在显示label 之前需要访问好索引:

var database = xml.responseText;
console.log(database[0].label); // Add [0] because your example is an array of one element if you have more index refer to the edit  

如果响应是一个字符串，你需要在使用之前解析响应:

var database = JSON.parse(xml.responseText);
console.log(database[0].label);

---

编辑:

如果你的数组有多个索引，你可以使用 foreach循环:

database.forEach(function(el) {
    console.log(el.label);
})