Improve longest word (punctuation)

longest-word/main.go

@@ -7,6 +7,8 @@ import "os"
 import "bufio"
 import "strings"
 
+var PUNCTUATION = []string{".", ",", "\"", "—", "-", "/"}
+
 func longest(r io.Reader) string {
 	lw := ""
 	s := bufio.NewScanner(r)
@@ -14,14 +16,12 @@ func longest(r io.Reader) string {
 	for s.Scan() {
 		word := s.Text()
 		word = strings.ToLower(word)
-		word = strings.Replace(word, ".", "", -1)
-		word = strings.Replace(word, ",", "", -1)
-		word = strings.Replace(word, "\"", "", -1)
-		for _, word := range strings.Split(word, "—") {
+		for _, c := range PUNCTUATION {
+			word = strings.Replace(word, c, " ", -1)
+		}
+		for _, word := range strings.Fields(word) {
 			if len(word) > len(lw) {
-				if !strings.HasPrefix(word, "http://") {
-					lw = word
-				}
+				lw = word
 			}
 		}
 	}