如何使用Javascript向数组的每一行添加字段？

Question

我有一个javascript变量:

var x = 
{"ab":"x",
 "cd":"y",
 "de":"z",
 "answers":[
    {"answerId":222,"answerUId":1,"text":"x"},
    {"answerId":223,"answerUId":2,"text":"A"},
    {"answerId":224,"answerUId":3,"text":"A"}
 ]
}

如何在answer数组的每个元素中添加一个字段,其值为null？

Answer 1

您可以将新属性添加到对象,如下所示

x["answers"].forEach(function(currentObject) {
    currentObject["response"] = null;
});

这将遍历每个对象,并将response属性添加到每个对象中.