m

 /**
  * Created by LiuChuanYang on 2017/01/19.
  */
+'use strict';
 
 module.exports = function() {
-    let options = arguments[arguments.length - 1];
-    let ret = false;
-    let len = arguments.length - 1;
-    let i = 1;
+    var options = arguments[arguments.length - 1];
+    var ret = false;
+    var len = arguments.length - 1;
+    var i = 1;
 
     if (len > 0) {
         ret = arguments[0];

@@ -2,6 +2,8 @@
  * Created by LiuChuanYang on 2017/01/19.
  */
 
+'use strict';
+
 module.exports = function(v1, v2, options) {
     var ret = v1 === v2;
 

@@ -2,6 +2,8 @@
  * Created by LiuChuanYang on 2017/01/19.
  */
 
+'use strict';
+
 module.exports = function(v1, v2, options) {
     var ret = v1 >= v2;
 

@@ -2,6 +2,8 @@
  * Created by LiuChuanYang on 2017/01/19.
  */
 
+'use strict';
+
 module.exports = function(v1, v2, options) {
     var ret = v1 > v2;
 

@@ -2,6 +2,8 @@
  * Created by LiuChuanYang on 2017/01/19.
  */
 
+'use strict';
+
 module.exports = function(v1, v2, options) {
     var ret = v1 <= v2;
 

@@ -2,6 +2,8 @@
  * Created by LiuChuanYang on 2017/01/19.
  */
 
+'use strict';
+
 module.exports = function(v1, v2, options) {
     var ret = v1 < v2;
 

@@ -2,11 +2,13 @@
  * Created by LiuChuanYang on 2017/01/19.
  */
 
+'use strict';
+
 module.exports = function() {
-    let options = arguments[arguments.length - 1];
-    let ret = false;
-    let len = arguments.length - 1;
-    let i = 1;
+    var options = arguments[arguments.length - 1];
+    var ret = false;
+    var len = arguments.length - 1;
+    var i = 1;
 
     if (len > 0) {
         ret = arguments[0];