Go (golang) Tutorials - Buffered File I/O

#golang #go #input #output #file File I/O - Buffered I/O -------------------------- = Writing Data to File = Reading from a File = Appending to a File bufwritedemo.go ---------------- package main import ("os" "bufio" ) func main(){ file,err:=os.Create("newfile") if err!=nil { panic(err) } buf:=bufio.NewWriter(file) //Create a buffer for the os File buf.WriteString("Writing Data to Buffer\n") //Write data to buffer buf.Flush() //clears the buffer data and writes to the file file.Close() } bufreaddemo.go --------------- package main import ("os" "bufio" "fmt" ) func main(){ file,_:=os.Open("newfile") reader:=bufio.NewReader(file) data,_:=reader.Peek(50) fmt.Println(string(data)) file.Close() } appenddemo.go -------------- package main import "os" func main(){ //Opens an existing file with APPEND mode and Read/Write permission file,err:=os.OpenFile("newfile",os.O_APPEND|os.O_WRONLY,0644) if err !=nil { panic(err) } file.WriteString("Trying to append\n") file.Close() }