如何在JavaScript中将数组推送到对象

我试图将数组推送到JavaScript中的对象

这是我的对象的外观（推之前）：

因此，我想添加（推送）另一个名为行的数组，使其看起来如下所示：

  const data = {
  columns: [
    {
      label: "InvoiceID",
      field: "InvoiceID",
      sort: "asc",
      width: 150
    },
    {
      label: "Vendor Name",
      field: "Vendor Name",
      sort: "asc",
      width: 270
    },
    {
      label: "Invoice Date",
      field: "Invoice Date",
      sort: "asc",
      width: 200
    }
  ],
  rows: [
    {
      name: "Tiger Nixon",
      position: "System Architect",
      office: "Edinburgh",
      age: "61",
      date: "2011/04/25",
      salary: "$320"
    },
    {
      name: "Garrett Winters",
      position: "Accountant",
      office: "Tokyo",
      age: "63",
      date: "2011/07/25",
      salary: "$170"
    }
  ]
};

这是我一直在尝试的，但它不起作用

const rows = this.state.rows;
data.push(rows);

如果您想知道，我正在使用

axio

从数据库中获取此

rows

数组中没有错误，因为它看起来与上面所示完全相同。问题是我无法将数组推送到

数据

对象。我怎样才能做到这一点

不要将其复制，因为我正在从我的NodeJS服务器端点获取数组。

JavaScript是一种语言。可以在运行时向对象添加字段。只需向对象添加一个字段：

data.rows = this.state.rows;

JavaScript是一种语言。可以在运行时向对象添加字段。只需向对象添加一个字段：

data.rows = this.state.rows;

---

在类对象数组中没有这样的

push

函数

但你可以像下面这样做：

data = {
  columns: [
    {
      label: "InvoiceID",
      field: "InvoiceID",
      sort: "asc",
      width: 150
    },
    {
      label: "Vendor Name",
      field: "Vendor Name",
      sort: "asc",
      width: 270
    },
    {
      label: "Invoice Date",
      field: "Invoice Date",
      sort: "asc",
      width: 200
    }
  ],
  rows: [
    {
      name: "Tiger Nixon",
      position: "System Architect",
      office: "Edinburgh",
      age: "61",
      date: "2011/04/25",
      salary: "$320"
    },
    {
      name: "Garrett Winters",
      position: "Accountant",
      office: "Tokyo",
      age: "63",
      date: "2011/07/25",
      salary: "$170"
    }
  ]
};

const objectValue={
阵列1：[
{
id:1，
值：“一”，
},
{
id:2，
值：“2”，
}
]
};
常数newArray=[
{
id:3，
价值:'三',，
},
{
id:4，
值：“四”，
}
];
objectValue.array2=newArray；
log（objectValue）

在类似对象的数组中没有这样的

push

函数

但你可以像下面这样做：

data = {
  columns: [
    {
      label: "InvoiceID",
      field: "InvoiceID",
      sort: "asc",
      width: 150
    },
    {
      label: "Vendor Name",
      field: "Vendor Name",
      sort: "asc",
      width: 270
    },
    {
      label: "Invoice Date",
      field: "Invoice Date",
      sort: "asc",
      width: 200
    }
  ],
  rows: [
    {
      name: "Tiger Nixon",
      position: "System Architect",
      office: "Edinburgh",
      age: "61",
      date: "2011/04/25",
      salary: "$320"
    },
    {
      name: "Garrett Winters",
      position: "Accountant",
      office: "Tokyo",
      age: "63",
      date: "2011/07/25",
      salary: "$170"
    }
  ]
};

const objectValue={
阵列1：[
{
id:1，
值：“一”，
},
{
id:2，
值：“2”，
}
]
};
常数newArray=[
{
id:3，
价值:'三',，
},
{
id:4，
值：“四”，
}
];
objectValue.array2=newArray；
log（objectValue）您只需调用以下代码：

let data = {
  columns: [
    {
      label: "InvoiceID",
      field: "InvoiceID",
      sort: "asc",
      width: 150
    },
    {
      label: "Vendor Name",
      field: "Vendor Name",
      sort: "asc",
      width: 270
    },
    {
      label: "Invoice Date",
      field: "Invoice Date",
      sort: "asc",
      width: 200
    }
  ]
};

data["rows"] = [
    {
      name: "Tiger Nixon",
      position: "System Architect",
      office: "Edinburgh",
      age: "61",
      date: "2011/04/25",
      salary: "$320"
    },
    {
      name: "Garrett Winters",
      position: "Accountant",
      office: "Tokyo",
      age: "63",
      date: "2011/07/25",
      salary: "$170"
    }
  ];

然后您的对象将看起来像您想要的，如下所示：

data = {
  columns: [
    {
      label: "InvoiceID",
      field: "InvoiceID",
      sort: "asc",
      width: 150
    },
    {
      label: "Vendor Name",
      field: "Vendor Name",
      sort: "asc",
      width: 270
    },
    {
      label: "Invoice Date",
      field: "Invoice Date",
      sort: "asc",
      width: 200
    }
  ],
  rows: [
    {
      name: "Tiger Nixon",
      position: "System Architect",
      office: "Edinburgh",
      age: "61",
      date: "2011/04/25",
      salary: "$320"
    },
    {
      name: "Garrett Winters",
      position: "Accountant",
      office: "Tokyo",
      age: "63",
      date: "2011/07/25",
      salary: "$170"
    }
  ]
};

描述：每次需要在对象中推（添加）键时，都应该使用此语法而不是推。因为对象不是数组

例如：

let obj = { key1:'it is key one','key2':['key2 array','key2 array']}

obj["your_new_key"]=whatever;

console.log(obj);

您只需调用以下代码：

let data = {
  columns: [
    {
      label: "InvoiceID",
      field: "InvoiceID",
      sort: "asc",
      width: 150
    },
    {
      label: "Vendor Name",
      field: "Vendor Name",
      sort: "asc",
      width: 270
    },
    {
      label: "Invoice Date",
      field: "Invoice Date",
      sort: "asc",
      width: 200
    }
  ]
};

data["rows"] = [
    {
      name: "Tiger Nixon",
      position: "System Architect",
      office: "Edinburgh",
      age: "61",
      date: "2011/04/25",
      salary: "$320"
    },
    {
      name: "Garrett Winters",
      position: "Accountant",
      office: "Tokyo",
      age: "63",
      date: "2011/07/25",
      salary: "$170"
    }
  ];

然后您的对象将看起来像您想要的，如下所示：

data = {
  columns: [
    {
      label: "InvoiceID",
      field: "InvoiceID",
      sort: "asc",
      width: 150
    },
    {
      label: "Vendor Name",
      field: "Vendor Name",
      sort: "asc",
      width: 270
    },
    {
      label: "Invoice Date",
      field: "Invoice Date",
      sort: "asc",
      width: 200
    }
  ],
  rows: [
    {
      name: "Tiger Nixon",
      position: "System Architect",
      office: "Edinburgh",
      age: "61",
      date: "2011/04/25",
      salary: "$320"
    },
    {
      name: "Garrett Winters",
      position: "Accountant",
      office: "Tokyo",
      age: "63",
      date: "2011/07/25",
      salary: "$170"
    }
  ]
};

描述：每次需要在对象中推（添加）键时，都应该使用此语法而不是推。因为对象不是数组

例如：

let obj = { key1:'it is key one','key2':['key2 array','key2 array']}

obj["your_new_key"]=whatever;

console.log(obj);

JavaScript对象没有.push（）方法。只有数组具有.push（）方法。
如果要在运行时在对象中添加另一个键值对，可以执行以下操作：
objectName[键]=值

在此场景中，您可以执行以下操作：data[rows]=this.state.rows
JavaScript对象没有.push（）方法。只有数组具有.push（）方法。
如果要在运行时在对象中添加另一个键值对，可以执行以下操作：
objectName[键]=值

在此场景中，您可以执行以下操作：data[rows]=this.state.rows
对象的可能副本没有
推送方法。您只需为它们分配一个新属性
data.rows=rows
data.rows=which对象的可能副本没有
推送
方法。您只需为它们分配一个新属性
data.rows=rows
data.rows=which