Rework of module system.

util/util.go

@@ -4,9 +4,25 @@ package util
 
 import (
 	"bytes"
+	"math/rand"
 	"strconv"
+	"time"
 )
 
+func ToInt(v interface{}) int {
+	switch v.(type) {
+	case int:
+		return v.(int)
+	case float64:
+		return int(v.(float64))
+	case string:
+		ret, _ := strconv.Atoi(v.(string))
+		return ret
+	default:
+		return 0
+	}
+}
+
 func NumberToString(n int, sep rune) string {
 	start := 0
 	var buf bytes.Buffer
@@ -31,3 +47,8 @@ func NumberToString(n int, sep rune) string {
 	}
 	return buf.String()
 }
+
+func Random(min, max int) int {
+	rand.Seed(time.Now().Unix())
+	return rand.Intn(max-min) + min
+}