package flag
String defines a string flag with specified name(1st parameter), default value(2nd parameter), and usage string(3rd parameter). The return value is the address of a string variable that stores the value of the flag.
Golang flag.FlagSet.String() function usage example
package main
import (
"flag"
"fmt"
)
var (
flagSet *flag.FlagSet
p string
)
func main() {
flagSet = flag.NewFlagSet("example", flag.ContinueOnError)
filename := flagSet.String("file", "textfile.txt", "filename to view")
flagSet.StringVar(&p, "timeout", "5000", "time to wait for response")
err := flagSet.Parse([]string{"file", "timeout"})
if err != nil {
fmt.Println(err)
}
fmt.Println(*filename)
fmt.Println(p)
}
Output :
textfile.txt
5000
Reference :
http://golang.org/pkg/flag/#FlagSet.String
