add version

main.go

@@ -9,10 +9,14 @@ import (
 	"strings"
 )
 
+// Version (semantic)
+const Version = "0.0.1"
+
 // environmental variable
 const nextwordDataPath = "NEXTWORD_DATA_PATH"
 
 // flags
+var versionFlag = flag.Bool("v", false, "show version")
 var dataPath = flag.String("data", os.Getenv(nextwordDataPath), "path to the data directory")
 var candidateNum = flag.Int("candidate-num", 100, "max candidates number")
 var helpFlag = flag.Bool("h", false, "show this message")
@@ -27,6 +31,12 @@ func main() {
 func run() error {
 	flag.Parse()
 
+	// version
+	if *versionFlag {
+		showVersion()
+		return nil
+	}
+
 	// help
 	if *helpFlag {
 		showHelpMessage()
@@ -60,6 +70,10 @@ func run() error {
 	return nil
 }
 
+func showVersion() {
+	fmt.Fprintln(os.Stderr, fmt.Sprintf("nextword version %s", Version))
+}
+
 func showHelpMessage() {
 	fmt.Fprintln(os.Stderr, "Nextword prints the most likely English words that follow the stdin sentence.")
 	fmt.Fprintln(os.Stderr)

nextword.go

@@ -12,7 +12,7 @@ import (
 )
 
 // ReadLineBufSize is buffer size for Nextword.ReadLine
-var ReadLineBufSize = 1024 // 1024 is fast (?)
+var ReadLineBufSize = 10000 // 10000 is the fastest value (?)
 
 // NextwordParams is a Nextword parameter.
 type NextwordParams struct {