Writing Files

import (

    "bufio"

    "fmt"

    "io/ioutil"

    "os"

)

func check(e error) {

    if e != nil {

        panic(e)

    }

}

func main() {

    d1 := []byte("hello\ngo\n")

    err := ioutil.WriteFile("/tmp/dat1", d1, 0644)

    check(err)

    f, err := os.Create("/tmp/dat2")

    check(err)

    defer f.Close()

    d2 := []byte{115, 111, 109, 101, 10}

    n2, err := f.Write(d2)

    check(err)

    fmt.Printf("wrote %d bytes\n", n2)

    n3, err := f.WriteString("writes\n")

    fmt.Printf("wrote %d bytes\n", n3)

    f.Sync()

    w := bufio.NewWriter(f)

    n4, err := w.WriteString("buffered\n")

    fmt.Printf("wrote %d bytes\n", n4)

    w.Flush()

}