func processLines(done chan<- struct{}, pageMap safemap.SafeMap,
lines <-chan string) {
getRx := regexp.MustCompile(`GET[ \t]+([^ \t\n]+[.]html?)`)
incrementer := func(value interface{}, found bool) interface{} {
if found {
return value.(int) + 1
}
return 1
}
for i := 0; i < workers; i++ {
go func() {
for line := range lines {
if matches := getRx.FindStringSubmatch(line); matches != nil {
pageMap.Update(matches[1], incrementer)
}
}
done <- struct{}{}
}()
}
}
func showResults(pageMap safemap.SafeMap) {
pages := pageMap.Close()
for page, count := range pages {
fmt.Printf("%8d %s\n", count, page)
}
}