如何在javascript中将数据从旧json复制到新json？答案

【问题标题】：How to copy data from old json to new json in javascript?如何在javascript中将数据从旧json复制到新json？
【发布时间】：2019-09-13 09:05:33
【问题描述】：

我有一个 json。如果提供者是“AXIS DATA”，我需要将“数据”的内容复制到新的 json 文件中。如何？

我试过的是

首先我使用json.parse 进行转换，然后使用 for 循环进行搜索。

这是我目前的代码

var hasilsearching = {};
var hasildata = JSON.parse( FIRST JSON );
for (var i=0 ; i < hasildata.data.length ; i++){
    if (hasildata.data[i].provider == "AXIS DATA") {
        hasilsearching = hasildata.data[i];
    }   
}

但不是我所期望的。我知道if()里面有问题。但我不知道。

这是我的 json 文件

{
    "errNumber": "0",
    "userID": "EKL0003097",
    "data": [
        {
            "code": "BXD1",
            "price": "15000.00",
            "name": "Voucher Axis Aigo 1GB 24J 30H",
            "ep": "770",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "AXIS DATA"
        },
        {
            "code": "BXD2",
            "price": "25000.00",
            "name": "Voucher Axis Aigo 2GB 24J 30H",
            "ep": "660",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "AXIS DATA"
        },
    {
            "code": "BOLT1",
            "price": "31000.00",
            "name": "Bolt Kuota 1,5GB 24Jam 30hr",
            "ep": "1320",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "BOLT"
        },
        {
            "code": "BOLT3",
            "price": "50000.00",
            "name": "Bolt Kuota 3GB 24Jam 30hr",
            "ep": "1127",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "BOLT"
        }
    ],
    "respMessage": "PROSES BERHASIL"
}

这是预期的新 json 文件

{
    "data": [
        {
            "code": "BXD1",
            "price": "15000.00",
            "name": "Voucher Axis Aigo 1GB 24J 30H",
            "ep": "770",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "AXIS DATA"
        },
        {
            "code": "BXD2",
            "price": "25000.00",
            "name": "Voucher Axis Aigo 2GB 24J 30H",
            "ep": "660",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "AXIS DATA"
        }
    ]
}

【问题讨论】：

hasilsearching = hasildata.data[i]; 应该是hasilsearching['data'][] = hasildata.data[i];

标签： javascript arrays json object

【解决方案1】：

向hasilsearching 的data 属性添加一个空数组，并在push 上进行任何匹配：

var hasildata = {"errNumber":"0","userID":"EKL0003097","data":[{"code":"BXD1","price":"15000.00","name":"Voucher Axis Aigo 1GB 24J 30H","ep":"770","isActive":"Active","type":"KUOTA","provider":"AXIS DATA"},{"code":"BXD2","price":"25000.00","name":"Voucher Axis Aigo 2GB 24J 30H","ep":"660","isActive":"Active","type":"KUOTA","provider":"AXIS DATA"},{"code":"BOLT1","price":"31000.00","name":"Bolt Kuota 1,5GB 24Jam 30hr","ep":"1320","isActive":"Active","type":"KUOTA","provider":"BOLT"},{"code":"BOLT3","price":"50000.00","name":"Bolt Kuota 3GB 24Jam 30hr","ep":"1127","isActive":"Active","type":"KUOTA","provider":"BOLT"}],"respMessage":"PROSES BERHASIL"};

var hasilsearching = { data: [] };
for (var i=0 ; i < hasildata.data.length ; i++){
  if (hasildata.data[i].provider == "AXIS DATA") {
    hasilsearching.data.push(hasildata.data[i]);
  }   
}

console.log(hasilsearching);

.as-console-wrapper { max-height: 100% !important; top: auto; }

使用filter也容易得多：

var hasildata = {"errNumber":"0","userID":"EKL0003097","data":[{"code":"BXD1","price":"15000.00","name":"Voucher Axis Aigo 1GB 24J 30H","ep":"770","isActive":"Active","type":"KUOTA","provider":"AXIS DATA"},{"code":"BXD2","price":"25000.00","name":"Voucher Axis Aigo 2GB 24J 30H","ep":"660","isActive":"Active","type":"KUOTA","provider":"AXIS DATA"},{"code":"BOLT1","price":"31000.00","name":"Bolt Kuota 1,5GB 24Jam 30hr","ep":"1320","isActive":"Active","type":"KUOTA","provider":"BOLT"},{"code":"BOLT3","price":"50000.00","name":"Bolt Kuota 3GB 24Jam 30hr","ep":"1127","isActive":"Active","type":"KUOTA","provider":"BOLT"}],"respMessage":"PROSES BERHASIL"};

var hasilsearching = { data: hasildata.data.filter(({ provider }) => provider == "AXIS DATA") };

console.log(hasilsearching);

.as-console-wrapper { max-height: 100% !important; top: auto; }

【讨论】：

谢谢你的回答，它的工作。使用过滤器很棒。
嘿，抱歉回复晚了。当我在上面的答案中使用过滤器时，我收到一条警告消息。它说'解构绑定'在 ES6 中可用（使用'esversion：6'）和'箭头函数语法（=>）'仅在 ES6 中可用（使用'esversion：6'）我如何摆脱这个警告？

【解决方案2】：

您可以像这样简单地过滤您的数据：

let filteredData = hasildata.data.filter(x => x.provider=='AXIS DATA');

【讨论】：

【解决方案3】：

使用 forEach 循环

var data={
    "errNumber": "0",
    "userID": "EKL0003097",
    "data": [
        {
            "code": "BXD1",
            "price": "15000.00",
            "name": "Voucher Axis Aigo 1GB 24J 30H",
            "ep": "770",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "AXIS DATA"
        },
        {
            "code": "BXD2",
            "price": "25000.00",
            "name": "Voucher Axis Aigo 2GB 24J 30H",
            "ep": "660",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "AXIS DATA"
        },
    {
            "code": "BOLT1",
            "price": "31000.00",
            "name": "Bolt Kuota 1,5GB 24Jam 30hr",
            "ep": "1320",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "BOLT"
        },
        {
            "code": "BOLT3",
            "price": "50000.00",
            "name": "Bolt Kuota 3GB 24Jam 30hr",
            "ep": "1127",
            "isActive": "Active",
            "type": "KUOTA",
            "provider": "BOLT"
        }
    ],
    "respMessage": "PROSES BERHASIL"
}
var d={data:[]}
data.data.forEach(e=>{
if(e.provider=="AXIS DATA")
d.data.push(e)
})

【讨论】：

【解决方案4】：

如果您想将字段推送到数组，请使用以下命令：

var data = [];
for(var el of myjson.data){
  if(el.provider === "AXIS DATA"){    
    data.push(JSON.parse(JSON.stringify(el)));
  }
}

【讨论】：

这行不通 - myjson.data 是一个对象数组，而不是单个对象。这就是为什么需要某种循环的原因。
@JackBashford 谢谢你指出，我更新了我的答案