如何将对象作为成员遍历普通 JavaScript 对象

javascript loops

2022-08-29 21:58:16

如何遍历 JavaScript 对象中的所有成员，包括作为对象的值？

例如，我如何循环（访问每个的“your_name”和“your_message”）？

var validation_messages = {
    "key_1": {
        "your_name": "jimmy",
        "your_msg": "hello world"
    },
    "key_2": {
        "your_name": "billy",
        "your_msg": "foo equals bar"
    }
}

答案 1

for (var key in validation_messages) {
    // skip loop if the property is from prototype
    if (!validation_messages.hasOwnProperty(key)) continue;

    var obj = validation_messages[key];
    for (var prop in obj) {
        // skip loop if the property is from prototype
        if (!obj.hasOwnProperty(prop)) continue;

        // your code
        alert(prop + " = " + obj[prop]);
    }
}

答案 2

在 ECMAScript 5 下，您可以将和组合：Object.keys()Array.prototype.forEach()

var obj = {
  first: "John",
  last: "Doe"
};

//
//	Visit non-inherited enumerable keys
//
Object.keys(obj).forEach(function(key) {

  console.log(key, obj[key]);

});