Javascript 如何迭代 Node.js 中的 JSON 数组？
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How to iterate over a JSON array in Node.js?
提问by Piet
I have a JSON array:
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"
}
]
To iterate over the array in PHP I would use the following code to iterate over the tablenames:
要在 PHP 中遍历数组，我将使用以下代码来遍历表名：
foreach($jArray as $value){
$tablename = $value['tablename'];
//some code
}
How can I do this in Node.js? I found many questions with it, but no actual answer. Most of them are from 2011.
我怎样才能在 Node.js 中做到这一点？我发现了很多问题，但没有实际答案。其中大部分是2011年的。
回答by Clarkie
var tables = [
{ "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" }
];
tables.forEach(function(table) {
var tableName = table.name;
console.log(tableName);
});
回答by tier1
You need to de-serialize it to an object first.
您需要先将其反序列化为一个对象。
var arr = JSON.parse(<your json array>);
for(var i = 0; i < arr.length; i++)
{
var tablename = arr[i].tablename;
}
回答by Sai Jeevan Balla
var tables = [
{ "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" }
];
tables.map(({name})=> console.log(name)) for iterate in js for...in, map, forEach, reduce
在 js 中迭代 for...in、map、forEach、reduce
回答by ROOT
Another way to iterate over Array in node:
在节点中迭代数组的另一种方法：
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]);
};
