Ensure has treats nested sparse arrays consistently.

lodash.js

@@ -5343,29 +5343,24 @@
      * @returns {boolean} Returns `true` if `path` exists, else `false`.
      */
     function hasPath(object, path, hasFunc) {
-      if (object == null) {
-        return false;
-      }
-      var result = hasFunc(object, path);
-      if (!result && !isKey(path)) {
-        path = baseCastPath(path);
+      path = isKey(path, object) ? [path] : baseCastPath(path);
 
-        var index = -1,
-            length = path.length;
+      var index = -1,
+          length = path.length;
 
-        while (++index < length) {
-          var key = path[index];
-          if (!(result = object != null && hasFunc(object, key))) {
-            break;
-          }
-          object = object[key];
+      while (++index < length) {
+        var key = path[index];
+        if (!(result = object != null && hasFunc(object, key))) {
+          break;
         }
+        object = object[key];
       }
-      var length = object ? object.length : undefined;
-      return result || (
-        !!length && isLength(length) && isIndex(path, length) &&
-        (isArray(object) || isString(object) || isArguments(object))
-      );
+      if (result) {
+        return result;
+      }
+      var length = object ? object.length : 0;
+      return !!length && isLength(length) && isIndex(key, length) &&
+        (isArray(object) || isString(object) || isArguments(object));
     }
 
     /**
@@ -12048,7 +12043,7 @@
      * // => false
      */
     function has(object, path) {
-      return hasPath(object, path, baseHas);
+      return object != null && hasPath(object, path, baseHas);
     }
 
     /**
@@ -12078,7 +12073,7 @@
      * // => false
      */
     function hasIn(object, path) {
-      return hasPath(object, path, baseHasIn);
+      return object != null && hasPath(object, path, baseHasIn);
     }
 
     /**