Apply content to the end of the file using Go language

Preface

I studied the file library and finally found a way to use Go to append content to the end of the file

The main 2 functions:

func (f *File) Seek(offset int64, whence int) (ret int64, err error)
func (f *File) WriteAt(b []byte, off int64) (n int, err error)

Seek()Check the offset at the end of the file

WriteAt()Then start writing from the offset

Here are examples:

// fileName: file name (with full path)// content: the written contentfunc appendToFile(fileName string, content string) error {
  // Open the file in a write-only mode  f, err := (fileName, os.O_WRONLY, 0644)
  if err != nil {
   (" file create failed. err: " + ())
  } else {
   // Find the offset at the end of the file   n, _ := (0, os.SEEK_END)
   // Start writing content from the end offset   _, err = ([]byte(content), n)
  }  
defer ()  
return err}

Summarize

The editor thinks that the document blogs of golang in China are still a little lacking. I hope that everyone will share their experiences in coding, so that golang can become more and more useful! The above is the entire content of this article. I hope it will be helpful to everyone's study or work. If you have any questions, you can leave a message to communicate.