javascript - 遍历JavaScript中的JSON哈希

杰森：

{
 "comments":[
    {"id":1,"author_name":null,"comment_text":null,"url":"http://localhost:3000/comments/1.json"},
    {"id":2,"author_name":null,"comment_text":null,"url":"http://localhost:3000/comments/2.json"},{"id":3,"author_name":"Yerassyl","comment_text":"Hello world!","url":"http://localhost:3000/comments/3.json"},
    {"id":4,"author_name":"Yerassyl","comment_text":"hi there","url":"http://localhost:3000/comments/4.json"}
 ]
}

如何遍历注释中的每个注释。我想要这样的东西：

//pseudocode
comments.each(key,value){
// do something
}

我尝试了map，但是map是用于数组的。

编辑：
如果删除根节点“注释”，则可以使用.map：

var commentNodes = this.props.comments.map(function(comment,index){
      });

忽略this.props，实际上是React.js。
console.log（this.props.comments）返回带有根节点“ comments”的json对象

最佳答案

假设你有

var obj = {
 "comments":[
    {"id":1,"author_name":null,"comment_text":null,"url":"http://localhost:3000/comments/1.json"},
    {"id":2,"author_name":null,"comment_text":null,"url":"http://localhost:3000/comments/2.json"},{"id":3,"author_name":"Yerassyl","comment_text":"Hello world!","url":"http://localhost:3000/comments/3.json"},
    {"id":4,"author_name":"Yerassyl","comment_text":"hi there","url":"http://localhost:3000/comments/4.json"}
 ]
};

例如，您可以这样做

obj.comments.map(function (comment) {
    console.log(comment);
});

关于javascript - 遍历JavaScript中的JSON哈希，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31155024/