如何使用javascript在txt文件的新行中打印對象數組的每個對象？

Question

我的結果集是一個從函數返回的對象數組。

[{brand:"Toyota", model: "Prius"}, {brand:"Subaru", model:"WRX"}, {brand:"Honda", model: "Accord"}]

我正在使用

fs.writeFile('test.txt', array, (err) => {
    if (err) {
        console.log(err);
    }
})

“text.txt”看起來像這樣：

[{brand:"Toyota", model: "Prius"},{brand:"Subaru", model:"WRX"},{brand:"Honda", model: "Accord"}]

我怎么能以這樣的格式打印它們：

{brand:"Toyota", model: "Prius"}
{brand:"Subaru", model:"WRX"}
{brand:"Honda", model: "Accord"}

Answer 1

你可以嘗試傳遞一個函數

let arr = [{brand:"Toyota", model: "Prius"}, {brand:"Subaru", model:"WRX"}, {brand:"Honda", model: "Accord"}];

function mapLine(_arr, i){
  let a = [];
  _arr.forEach((item)=>{
    newLine = i === 0 ? "" : "\r\n";
    a.push(newLine + JSON.stringify(item));
  })
  return a;
}

fs.writeFile('test.txt', mapLine(arr), (err) => {
    if (err) {
        console.log(err);
    }
})