如何在javascript

Question

我正在尝试将示例csv文件加载到项目中，根据文件读取内容并显示。我完成了上传和文件写入，但未能正确优化json结构以备将来用例

  

以下是我的示例代码：

let csvToJson = require('convert-csv-to-json');
let json = csvToJson.getJsonFromCsv(filepath);
var lines = [];
for(let i=0; i<json.length;i++){
console.log(json[i]);
lines.push(json[i])
}
console.log(lines);
var result3=JSON.stringify(lines);
result3 = result3.replace(/\r?\n|\r/g, " ");
console.log(result3);

  

我的输出：

console.log（json [i]） =

Object {name,age,address: "asd,20,"12/76, 11th cross"
"}
browser.js:5358 Object {name,age,address: "dff,30,"33, 11th cross"
"}
browser.js:5358 Object {name,age,address: "f,22,"7g/22, 12th cross"
"}
browser.js:5358 Object {name,age,address: "ghth,55,"4h, 13th cross"
"}

console.log（行） = [对象，对象，对象，对象，对象]

的console.log（result3）

[{"name,age,address":"asd,20,\"12/76, 11th cross\"\r"},
{"name,age,address":"dff,30,\"33, 11th cross\"\r"},
{"name,age,address":"f,22,\"7g/22, 12th cross\"\r"},
{"name,age,address":"ghth,55,\"4h, 13th cross\"\r"},
{"name,age,address":"fhg,44,\"6t, 10th cross\"\r"}]

我的预期输出：

{name:[],age:[],address:[]}

即我想要所有＆＃34; name＆＃34;值应存储在名称键中，类似于＆＃34; age＆＃34;和＆＃34;地址＆＃34;。有人可以帮我怎么做吗？

Answer 1

从console.log(json[i])输出显而易见，模块convert-csv-to-json正在将您的csv文件转换为单个键值对的数组，这意味着name，age，{{ 1}}被连接成一个单元，同样适用于它们的价值。 此时您的文件密钥较少，您可以手动映射此密钥。

对于上述问题，您可以在逗号上使用address和array#reduce值。

＆＃13;

＆＃13;

split()

＆＃13;

＆＃13;

＆＃13;

Answer 2

这应该有效

let csvToJson = require('convert-csv-to-json');
let json = csvToJson.getJsonFromCsv(filepath);
let obj = JSON.parse(json);
let finalresult = obj.reduce((result, item) => {
    Object.entries(item).forEach(([key, value]) => {
       result[key] = result[key] || [];
       result[key].push(value);
    });
    return result;
}, {});

Answer 3

DEMO

＆＃13;

＆＃13;

var jsonObj = [{"name,age,address":"asd,20,\"12/76, 11th cross\"\r"},
{"name,age,address":"dff,30,\"33, 11th cross\"\r"},
{"name,age,address":"f,22,\"7g/22, 12th cross\"\r"},
{"name,age,address":"ghth,55,\"4h, 13th cross\"\r"},
{"name,age,address":"fhg,44,\"6t, 10th cross\"\r"}];

var newArray = {
            name:[],
            age:[],
            address:[]
          };
          
for (var i in jsonObj) {
  let [name, age, ...address] = jsonObj[i]["name,age,address"].split(',');
  newArray.name.push(name);
  newArray.age.push(age);
  newArray.address.push(address.join(''));
};

console.log(newArray);

＆＃13;

＆＃13;

＆＃13;