package os
Golang os.File.Write(), WriteString() and WriteAt() functions usage example
package main
import (
"fmt"
"os"
)
func main() {
file, err := os.Create("file.txt")
if err != nil {
panic(err)
}
defer file.Close()
fmt.Println("Writing data to file : ", file.Name())
//----------------------------------------
n, err := file.Write([]byte("Data written to file via os package!"))
if err != nil {
panic(err)
}
file.Sync() // flush to disk
fmt.Printf("%d bytes written with Write() function.\n", n)
//----------------------------------------
n, err = file.WriteString("Data written to file without []byte")
if err != nil {
panic(err)
}
file.Sync() // flush to disk
fmt.Printf("%d bytes written with WriteString() function.\n", n)
//----------------------------------------
// so far we have written 71 bytes into the file. Let's try out WriteAt()
// and start writing from the last written position
n, err = file.WriteAt([]byte("Some binary data perhaps"), 71)
if err != nil {
panic(err)
}
file.Sync() // flush to disk
fmt.Printf("%d bytes written with WriteAt() function.\n", n)
}
NOTE : Similar to some IO package write functions.
See also : https://www.socketloop.com/tutorials/golang-write-file-io-writestring
References :
http://golang.org/pkg/os/#File.Write
