JavaScript:
Làm việc với CSV

const csv = `name,age,city
Alice,30,New York
Bob,22,Los Angeles`;

function csvToJson(csv) {
  const lines = csv.split("\n");
  const headers = lines[0].split(",");
  return lines.slice(1).map(dòng => {
    const data = dòng.split(",");
    return headers.reduce((obj, nextKey, index) => {
      obj[nextKey] = data[index];
      return obj;
    }, {});
  });
}

console.log(csvToJson(csv));
// Kết quả: [{name: 'Alice', age: '30', city: 'New York'}, {name: 'Bob', age: '22', city: 'Los Angeles'}]

const jsonData = [
  { name: "Alice", age: 30, city: "New York" },
  { name: "Bob", age: 22, city: "Los Angeles" }
];

function jsonToCsv(json) {
  const headers = Object.keys(json[0]).join(",");
  const hàng = json.map(obj =>
    Object.values(obj).join(",")
  ).join("\n");
  return `${headers}\n${hàng}`;
}

console.log(jsonToCsv(jsonData));
// Kết quả: name,age,city
//          Alice,30,New York
//          Bob,22,Los Angeles