I'm not sure I understand the reasoning behind this example (taken from here), nor what it is trying to communicate about the Go language:
package main
import (
"flag"
"fmt"
)
func main() {
f := flag.NewFlagSet("flag", flag.ExitOnError)
f.Bool("bool", false, "this is bool flag")
f.Int("int", 0, "this is int flag")
visitor := func(a *flag.Flag) {
fmt.Println(">", a.Name, "value=", a.Value)
}
fmt.Println("Visit()")
f.Visit(visitor)
fmt.Println("VisitAll()")
f.VisitAll(visitor)
// set flags
f.Parse([]string{"-bool", "-int", "100"})
fmt.Println("Visit() after Parse()")
f.Visit(visitor)
fmt.Println("VisitAll() after Parse()")
f.VisitAll(visitor)
}
Something along the lines of the setup they have but then adding a
int_val := f.get("int")
to get the named argument would seem more useful. I'm completely new to Go, so just trying to get acquainted with the language.