move RandStr to helpers

helpers/helpers.go

@@ -3,9 +3,13 @@ package helpers
 import (
 	"fmt"
 	"strings"
+	"math/rand"
+	"time"
 	"strconv"
 )
 
+var r = rand.New(rand.NewSource(time.Now().UnixNano()))
+
 func Ask(str string) bool {
 	var input string
 	fmt.Printf("-> %s (Y/n): ", str)
@@ -30,3 +34,11 @@ func ToString(v interface{}) string {
 		return ""
 	}
 }
+
+func RandStr(n int) string {
+    b := make([]byte, n)
+    for i := range b {
+        b[i] = byte(r.Intn(26) + 'a')
+    }
+    return string(b)
+}