Javascript 多维数组对象

我正在尝试使用JS访问多维数组中的元素。这似乎不起作用。请帮忙

var parsed = "";
 var myObject = [{
     firstname: "Jane",
     lastname: "Doe",
     email: "jdoe@email.com"
 }, {
     firstname: "Ja",
     lastname: "joe",
     email: "je@email.com"
 }];
 for (var prop in myObject) {
     parsed += prop + ": " + myObject[prop] + "\n";
 }
 alert(parsed);

---

您应该迭代数组并按名称选择适当的属性：

var parsed = "";
var myObject = [{
     firstname: "Jane",
     lastname: "Doe",
     email: "jdoe@email.com"
  },
  {
     firstname: "Ja",
     lastname: "joe",
     email: "je@email.com"
  },
];
for(var item in myObject)
{
  for (var prop in item) {
    parsed += prop + ": " + item[prop] + "\n";
  }
}

---

您需要另一个循环来迭代数组元素

var parsed = "";
var myObject = [{
     firstname: "Jane",
     lastname: "Doe",
     email: "jdoe@email.com"
},
 {
     firstname: "Ja",
     lastname: "joe",
     email: "je@email.com"
 },
 ];
for (i = 0; i< myObject.length; i++){
    var myobj=  myObject[i];
  for (var prop in myobj) {
     parsed += prop + ": " + myobj[prop] + "\n";
 }
}
 alert(parsed);  

var parsed=”“；
变量myObject=[{
名字：“简”，
姓：“Doe”，
电子邮件：“jdoe@email.com"
},
{
名字：“Ja”，
姓：“乔”，
电子邮件：“je@email.com"
},
];
对于（i=0；i

---

这里有一段代码片段供您参考。
您的基本错误是

myObject

是一个对象数组，因此必须在数组上循环，然后在给定索引中的对象上循环

var attr,
        prop,
        parsed = "",
        myObject = [
            {
                firstname: "Jane",
                lastname: "Doe",
                email: "jdoe@email.com"
            },
            {
                firstname: "Ja",
                lastname: "joe",
                email: "je@email.com"
            }
        ];


// My object is an array
myObject.forEach(function(item, index, array) {

    // Verify to see that the property you want is yours and not inherited
    for (attr in item) {
        if (item.hasOwnProperty(attr)) {
            parsed += attr + ": " + item[attr] + "\n";
        }
    }

})

alert(parsed);

---

这段代码会出现什么错误？取决于您想要什么，但要获得一些有意义的输出（基于您的输入），您应该访问

myObject[prop].firstname/lastname/email

等。如果它只是一个一维数组..我得到了正确的响应。此代码抛出以下内容：0[object]1[object]