1 files changed, 4 insertions, 4 deletions
diff --git a/lib/underscore/underscore.js b/lib/underscore/underscore.js
index 7006910e..faadaeb8 100644
--- a/lib/underscore/underscore.js
+++ b/lib/underscore/underscore.js
@@ -38,7 +38,7 @@
       propertyIsEnumerable  = Object.prototype.propertyIsEnumerable;
 
   // Current version.
-  _.VERSION = '0.5.7';
+  _.VERSION = '0.5.8';
 
   // ------------------------ Collection Functions: ---------------------------
 
@@ -49,7 +49,7 @@
     try {
       if (obj.forEach) {
         obj.forEach(iterator, context);
-      } else if (_.isArray(obj) || _.isArguments(obj)) {
+      } else if (_.isNumber(obj.length)) {
         for (var i=0, l=obj.length; i<l; i++) iterator.call(context, obj[i], i, obj);
       } else {
         var keys = _.keys(obj), l = keys.length;
@@ -152,7 +152,7 @@
   // Determine if a given value is included in the array or object,
   // based on '==='.
   _.include = function(obj, target) {
-    if (_.isArray(obj)) return _.indexOf(obj, target) != -1;
+    if (obj && _.isFunction(obj.indexOf)) return _.indexOf(obj, target) != -1;
     var found = false;
     _.each(obj, function(value) {
       if (found = value === target) _.breakLoop();
@@ -400,7 +400,7 @@
 
   // Retrieve the names of an object's properties.
   _.keys = function(obj) {
-    if(_.isArray(obj)) return _.range(0, obj.length);
+    if (_.isArray(obj)) return _.range(0, obj.length);
     var keys = [];
     for (var key in obj) if (hasOwnProperty.call(obj, key)) keys.push(key);
     return keys;