javascript - 如何使用 d3.js 导航 JSON 嵌套文件？

Question

感谢您提前提供的帮助。这是我的问题，我在探索 json 嵌套文件并尝试时遇到了麻烦。这是我的 json 文件

 {"Id":466,"Name":"korea",
"Occurrences":                                                                                                                                                                                                                                                            
 [
   {"OccurrenceDate":"\/Date(1398207600000+0100)\/","OccurrenceFrequency":27},
   {"OccurrenceDate":"\/Date(1398726000000+0100)\/","OccurrenceFrequency":1},
   {"OccurrenceDate":"\/Date(1398898800000+0100)\/","OccurrenceFrequency":4},
   {"OccurrenceDate":"\/Date(1399071600000+0100)\/","OccurrenceFrequency":303}]}

这是我的 JavaScript 代码:

  <script src="http://d3js.org/d3.v3.min.js"></script>
 <script>



 d3.json("data2.json", function(error, data) {
  data.forEach(function(d) {

    console.log(d.Id)
    console.log(d.Name)
    console.log(d.Occurrence.OccurrenceFrequency)
    console.log(d.Occurrence.OccurrenceDate)})

    return d;
  });
}); 
</script>

真心寻求帮助

Answer 1

尝试一下。鉴于您的格式是一个对象，您不能对其使用 forEach，但似乎您不需要这样做。

d3.json("data2.json", function(error, data) {
  console.log(data.Id)
  console.log(data.Name)
  data.Occurences.forEach(function(d) {

    console.log(d.OccurrenceFrequency)
    console.log(d.OccurrenceDate)})

    return d;
  });
});