Underscore 1.0.1 -- bugfix release for _.isEqual

index.html

@@ -111,11 +111,11 @@ <h2>Downloads <i style="padding-left: 12px; font-size:12px;">(Right-click, and u
     <p>
       <table>
         <tr>
-          <td><a href="underscore.js">Development Version (1.0.0)</a></td>
+          <td><a href="underscore.js">Development Version (1.0.1)</a></td>
           <td><i>25kb, Uncompressed with Comments</i></td>
         </tr>
         <tr>
-          <td><a href="underscore-min.js">Production Version (1.0.0)</a></td>
+          <td><a href="underscore-min.js">Production Version (1.0.1)</a></td>
           <td><i>2.5kb, Packed and Gzipped</i></td>
         </tr>
       </table>
@@ -1136,6 +1136,12 @@ <h2>Links &amp; Suggested Reading</h2>
 
       <h2>Change Log</h2>
 
+      <p>
+        <b class="header">1.0.1</b><br />
+        Bugfix for <tt>_.isEqual</tt>, when comparing two objects with the same 
+        number of undefined keys, but with different names.
+      </p>
+
       <p>
         <b class="header">1.0.0</b><br />
         Things have been stable for many months now, so Underscore is now

package.json

@@ -7,5 +7,5 @@
   "contributors"  : [],
   "dependencies"  : [],
   "lib"           : ".",
-  "version"       : "1.0.0"
+  "version"       : "1.0.1"
 }

test/objects.js

@@ -58,6 +58,7 @@ $(document).ready(function() {
     ok(_.isEqual(new Date(100), new Date(100)), 'identical dates are equal');
     ok(_.isEqual((/hello/ig), (/hello/ig)), 'identical regexes are equal');
     ok(!_.isEqual(null, [1]), 'a falsy is never equal to a truthy');
+    ok(!_.isEqual({x: 1, y: undefined}, {x: 1, z: 2}), 'object with the same number of undefined keys are not equal');
   });
 
   test("objects: isEmpty", function() {

underscore.js

@@ -55,7 +55,7 @@
   root._ = _;
 
   // Current version.
-  _.VERSION = '1.0.0';
+  _.VERSION = '1.0.1';
 
   // ------------------------ Collection Functions: ---------------------------
 
@@ -485,7 +485,7 @@
     // Different object sizes?
     if (aKeys.length != bKeys.length) return false;
     // Recursive comparison of contents.
-    for (var key in a) if (!_.isEqual(a[key], b[key])) return false;
+    for (var key in a) if (!(key in b) || !_.isEqual(a[key], b[key])) return false;
     return true;
   };