这大神的代码都没有声明的。。。

Author: shengyonggen

sensorsdata.min.js

@@ -251,8 +251,14 @@ _.encodeDates = function(obj) {
 };
 
 _.hashCode = function(str){
+  if(typeof str !== 'string'){
+    return 0;
+  }
   var hash = 0;
-  if (str.length == 0) return hash;
+  var char = null;
+  if (str.length == 0) {
+    return hash;
+  }
   for (var i = 0; i < str.length; i++) {
     char = str.charCodeAt(i);
     hash = ((hash<<5)-hash)+char;

src/sdk.js

@@ -122,7 +122,7 @@ sd.initPara = function(para){
   , slice = ArrayProto.slice
   , toString = ObjProto.toString
   , hasOwnProperty = ObjProto.hasOwnProperty
-  , LIB_VERSION = '1.8.1.3';
+  , LIB_VERSION = '1.8.1.4';
 
 sd.lib_version = LIB_VERSION;
 
@@ -369,8 +369,14 @@ _.encodeDates = function(obj) {
 };
 
 _.hashCode = function(str){
+  if(typeof str !== 'string'){
+    return 0;
+  }
   var hash = 0;
-  if (str.length == 0) return hash;
+  var char = null;
+  if (str.length == 0) {
+    return hash;
+  }
   for (var i = 0; i < str.length; i++) {
     char = str.charCodeAt(i);
     hash = ((hash<<5)-hash)+char;