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在Nodejs中编写多个文件循环(Writing multiple files a loop in Nodejs)

 嗨我在nodejs脚本中使用每个循环来将多个文件写入本地位置。对于courseTitleArray我正在使用“Biology 101，ruby”，我可以成功写一个文件，但不能同时写两个 。请帮助我出。 
 

 到目前为止，这是我的代码 
 

  for (var value in CourseTitleArray) {
               console.log( "Course Title " + CourseTitleArray[value]);
               var newImageLocation = path.join(__dirname, 'app/img/courseImages', CourseTitleArray[value] +  ".png");

                  fs.readFile(image.path, function(err, data) {
                      fs.writeFile(newImageLocation, data, function(err) {
                      console.log(CourseTitleArray[value] + " was  created successfully");   




                      });
                  }); 

                console.log("Loop executed " +  value);  
             }

 

 在控制台中我得到以下日志。 
 

Course Title Biology 101
Loop executed 0
Course Title ruby
Loop executed 1
ruby was  created successfully
ruby was  created successfully 

 

 似乎循环工作正常，在日志中我可以看到两个标题。 但当它写“生物学101，红宝石”已经执行了两次。 
 

 有人可以帮我解决这个问题吗？ 谢谢 

Hi I'm using a for each loop to in nodejs script to write multiple files to a local location.For the courseTitleArray I'm using "Biology 101,ruby" and I can write one file successfully but not the both.Please help me out.
 

Here is my code so far
 

  for (var value in CourseTitleArray) {
               console.log( "Course Title " + CourseTitleArray[value]);
               var newImageLocation = path.join(__dirname, 'app/img/courseImages', CourseTitleArray[value] +  ".png");

                  fs.readFile(image.path, function(err, data) {
                      fs.writeFile(newImageLocation, data, function(err) {
                      console.log(CourseTitleArray[value] + " was  created successfully");   




                      });
                  }); 

                console.log("Loop executed " +  value);  
             }

 

And in the console I get following logs.
 

Course Title Biology 101
Loop executed 0
Course Title ruby
Loop executed 1
ruby was  created successfully
ruby was  created successfully 

 

It seems the loops working fine and as in the log I can see both titles. But when it's writing "Biology 101,ruby" have executed twice .
 

Can anybody help me out with this? Thanks

原文：
更新时间：2022-05-28 09:05

最满意答案

 请参阅上面的评论 - 您可以修改您的阅读/写作，如下所示： 
 

  using (StreamReader sr = new StreamReader(inputfile))
  {
    using (StreamWriter writer = new StreamWriter(outputfile, false))
    {
      int id = 1;

      while (sr.Peek() >= 0)
      {
        string fileLine = sr.ReadLine();

        //do something with line
        string ttt = fileLine.Replace(" ", ", ");
        writer.WriteLine(ttt + "," + id);
        id++;
      }
    }
  }


See my comment above - you could modify your reading / writing as follows :
 

  using (StreamReader sr = new StreamReader(inputfile))
  {
    using (StreamWriter writer = new StreamWriter(outputfile, false))
    {
      int id = 1;

      while (sr.Peek() >= 0)
      {
        string fileLine = sr.ReadLine();

        //do something with line
        string ttt = fileLine.Replace(" ", ", ");
        writer.WriteLine(ttt + "," + id);
        id++;
      }
    }
  }

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