如何遍历数组并将每个迭代写入同一文件[nodejs]

Question

I have an array of data which i want to loop over and while looping over I want to write them to the same file. How i can achieve the same, my following code will only print the last iteration.

for (j = 0; j < arrayPart.length; j++){
    fs.writeFileSync('message.txt', arrayPart[j])
}

message.txt will have the last value of arrayPart .

Answer 1

只需join数组并一次写入文件即可：

fs.writeFileSync('message.txt', arrayPart.join(""));

Answer 2

Instead of opening/writing/closing at every iteration I would open a write stream, write inside the loop and close at the end:

 const message = fs.createWriteStream(__dirname + "./message.txt");
 for (let j = 0; j <arrayPart.length; j++){
      message.write(arrayPart[j]);
 }
 message.close();

Or you just join the array and write all at once:

 fs.writeFileSync('message.txt', arrayPart.join(""));