package main
import (
"bufio"
"fmt"
"io"
"os"
"strings"
)
func ReadLine(fileName string, handler func(string)) error {
f, err := os.Open(fileName)
if err != nil {
return err
}
buf := bufio.NewReader(f)
for {
line, err := buf.ReadString('\n')
line = strings.TrimSpace(line)
handler(line)
if err != nil {
if err == io.EOF {
return nil
}
return err
}
}
return nil
}
func split(s rune) bool {
if s == ' ' {
return true
}
return false
}
func Print(line string) {
ip_addr := strings.FieldsFunc(line, split)[0]
host_name := strings.FieldsFunc(line, split)[1]
fmt.Println(ip_addr + ":" + host_name)
}
func main() {
ReadLine("1.txt", Print)
}
