javascript - 如何遍历JSON结构？ [重复](How do I iterate over a JSON structure? [duplicate])

Question

This question already has an answer here:

(这个问题已经在这里有了答案：)

• For-each over an array in JavaScript?

  (在JavaScript中逐个遍历数组？)

  33 answers

  (33个答案)

I have the following JSON structure:

(我具有以下JSON结构：)

[{ "id":"10", "class": "child-of-9" }, { "id": "11", "classd": "child-of-10" }]

How do I iterate over it using JavaScript?

(如何使用JavaScript进行迭代？)

  ask by Flueras Bogdan translate from so

Answer 1

var arr = [ {"id":"10", "class": "child-of-9"}, {"id":"11", "classd": "child-of-10"}];

for (var i = 0; i < arr.length; i++){
    var obj = arr[i];
    for (var key in obj){
        var attrName = key;
        var attrValue = obj[key];
    }
}

 var arr = [ {"id":"10", "class": "child-of-9"}, {"id":"11", "class": "child-of-10"}]; for (var i = 0; i < arr.length; i++){ document.write("<br><br>array index: " + i); var obj = arr[i]; for (var key in obj){ var value = obj[key]; document.write("<br> - " + key + ": " + value); } } 

note: the for-in method is cool for simple objects.

(注意：for-in方法对于简单对象很酷。)

Not very smart to use with DOM object.

(与DOM对象配合使用不是很聪明。)