Question

我有一个像这样的分组数组

this.state.tableData=

[0:{key: "EMAIL",val:  ["john@example.com", "harry@example.com", "howard@example.com"]}
1:{key: "LASTNAME",val:  ["Smith", "Pierce", "Paige"]}
2:{key: "FIRSTNAME",val: ["John", "Harry", "Howard"]}
3:{key: "SMS",val: ["33123456789", "33111222222", "33777888898"]}
]

我想将其转换为

之类的普通数组

0: {EMAIL: "john@example.com", LASTNAME: "Smith", FIRSTNAME: "John", SMS: "33123456789"}
1: {EMAIL: "harry@example.com", LASTNAME: "Pierce", FIRSTNAME: "Harry", SMS: "33111222222"}
2: {EMAIL: "howard@example.com", LASTNAME: "Paige", FIRSTNAME: "Howard", SMS: "33777888898"}

我尝试了以下代码

this.state.csvHeaders=["EMAIL','FIRSTNAME','LASTNAME']

var contacts=[];
this.state.tableData.map(k => {

        k.val.map(r => {

        Object.keys(this.state.csvHeaders).forEach(key => {

             if(k.val["Col"]==="EMAIL")
             {
                contacts[key]['EMAIL']=r;
             }

        })

        })

    })

但是它不起作用..任何建议我还可以修改。我如何存储，将它们推入数组？

Answer 1

遵循这些原则应该可以起作用：

    const tableData= [
        {key: "EMAIL",val:  ["john@example.com", "harry@example.com", "howard@example.com"]},
        {key: "LASTNAME",val:  ["Smith", "Pierce", "Paige"]},
        {key: "FIRSTNAME",val: ["John", "Harry", "Howard"]},
        {key: "SMS",val: ["33123456789", "33111222222", "33777888898"]},
];
const csvHeaders = ['EMAIL','FIRSTNAME','LASTNAME', 'SMS'];

const contacts = [];
csvHeaders.forEach( (header, idx) => {

        tableData[0].val.forEach( (info, contactPos) => {
                contacts[contactPos] = contacts[contactPos] || {};
                contacts[contactPos][header] =  tableData.find(row => row.key === header).val[contactPos];
        })
})

console.log(contacts);

Answer 2

您可以使用reduce和forEach做到这一点：

var tableData = [
  { key: 'EMAIL',val: ['john@example.com','harry@example.com','howard@example.com'],},
  { key: 'LASTNAME', val: ['Smith', 'Pierce', 'Paige'] },
  { key: 'FIRSTNAME', val: ['John', 'Harry', 'Howard'] },
  { key: 'SMS',val: ['33123456789', '33111222222', '33777888898'],},
];

console.log(
  tableData.reduce((result, { key, val }) => {
    val.forEach((val, index) => {
      result[index] = result[index] || {};
      result[index][key] = val;
    });
    return result;
  }, [])
);

React JS将分组的列数组转换为普通数组

2 个答案: