array detection fail

tests/array-wtf.js

@@ -0,0 +1,71 @@
+(function () {
+  require('remedial');
+
+  a = [];
+  a[2] = 27;
+  console.log(a);
+  // Expected: [undefined, undefined, 27];
+  // Node/V8: [ 27 ];
+  // FF3: [undefined, undefined, 27];
+  console.log(a.length);
+  // 3
+  console.log(typeOf(a));
+  // array
+  
+
+
+  b = Object.create([]);
+  b[2] = 27;
+  console.log(b);
+  // Expected: [undefined, undefined, 27];
+  // Node/V8: [ 27 ]
+  console.log(b.length);
+  // Expected: 3
+  // Node/V8/FF: 0
+  console.log(typeOf(b));
+  // array
+
+
+  c = Object.create([]);
+  c.push();
+  c.push();
+  c.push(27);
+  console.log(c);
+  // Expected: [undefined, undefined, 27]
+  // Node: [ 27, length: 1 ]
+  // FF: []
+  console.log(c.length);
+  // Expected: 3
+  // Node/V8/FF: 1
+  console.log(typeOf(c));
+  // Expected: array
+  // Node/V8/FF: object
+}());
+
+/*
+  Exact Node Output:
+  [ 27 ]
+  3
+  array
+  [ 27 ]
+  0
+  array
+  [ 27, length: 1 ]
+  1
+  object
+
+  Exact FF (firebug) Output (expanded):
+  [undefined, undefined, 27]
+    >   2         27
+  3
+  array
+  []
+    >   2         27
+  0
+  array
+  [27]
+    >   0         27
+        length    1
+  1
+  object
+*/