Javascript 如何在Node.js中迭代JSON数组？

我有一个JSON数组：

[
    {
        "art": "A",
        "count": "0",
        "name": "name1",
        "ean": "802.0079.127",
        "marker": "null",
        "stammkost": "A",
        "tablename": "IWEO_IWBB_01062015"
    },
    {
        "art": "A",
        "count": "0",
        "name": "2",
        "ean": "657.7406.559",
        "marker": "null",
        "stammkost": "A",
        "tablename": "IWEO_IWBB_02062015"
    }
]

要在PHP中迭代数组，我将使用以下代码迭代表名：

foreach($jArray as $value){ 
  $tablename = $value['tablename'];
  //some code
}

---

如何在Node.js中执行此操作？我发现了很多问题，但没有实际的答案。大多数都是从2011年开始的。

您需要先将其反序列化为对象

var arr = JSON.parse(<your json array>);
for(var i = 0; i < arr.length; i++)
{
  var tablename = arr[i].tablename;
}

var arr=JSON.parse（）；
对于（变量i=0；i

var表=[
{“艺术”：“A”，“计数”：“0”，“名称”：“name1”，“ean”：“802.0079.127”，“标记”：“null”，“stammkost”：“A”，“表名”：“IWEO_IWBB_01062015”}，
{“艺术”：“A”，“计数”：“0”，“名称”：“2”，“ean”：“657.7406.559”，“标记”：“null”，“stammkost”：“A”，“表名”：“IWEO_IWBBࠍ020615”}
];
tables.map（（{name}）=>console.log（name））

迭代节点中数组的另一种方法：

let Arr = [
    {"art": "A","count": "0","name": "name1","ean": "802.0079.127","marker": "null","stammkost": "A","tablename": "IWEO_IWBB_01062015"},
    {"art": "A","count": "0","name": "2","ean": "657.7406.559","marker": "null","stammkost": "A","tablename": "IWEO_IWBB_02062015"}
];

for (key in Arr) {
  console.log(Arr[key]);
};

---

JSON只是一种符号。将其转换为本机数组，然后像往常一样执行操作，

for（；；）

对于数组，

for..in

对于对象

for..in

用于循环对象的键，您可能希望使用

for

来循环，而不是打印什么？我有两次“未定义”：(

let Arr = [
    {"art": "A","count": "0","name": "name1","ean": "802.0079.127","marker": "null","stammkost": "A","tablename": "IWEO_IWBB_01062015"},
    {"art": "A","count": "0","name": "2","ean": "657.7406.559","marker": "null","stammkost": "A","tablename": "IWEO_IWBB_02062015"}
];

for (key in Arr) {
  console.log(Arr[key]);
};