Merge pull request #5 from benatkin/root-reference

Root reference

Author: janl

jsonpointer.js

@@ -36,14 +36,22 @@ var validate_input = function(obj, pointer) {
 
 var get = function(obj, pointer) {
   validate_input(obj, pointer);
-  pointer = pointer.split("/").slice(1);
-  return traverse(obj, pointer);
+  if (pointer === "/") {
+    return obj;
+  } else {
+    pointer = pointer.split("/").slice(1);
+    return traverse(obj, pointer);
+  }
 }
 
 var set = function(obj, pointer, value) {
   validate_input(obj, pointer);
-  pointer = pointer.split("/").slice(1);
-  return traverse(obj, pointer, value);
+  if (pointer === "/") {
+    return obj;
+  } else {
+    pointer = pointer.split("/").slice(1);
+    return traverse(obj, pointer, value);
+  }
 }
 
 exports.get = get

test.js

@@ -31,6 +31,8 @@ assert.equal(jsonpointer.get(obj, "/d/e/0/a"), 4);
 assert.equal(jsonpointer.get(obj, "/d/e/1/b"), 5);
 assert.equal(jsonpointer.get(obj, "/d/e/2/c"), 6);
 
+assert.equal(jsonpointer.get(obj, "/"), obj);
+
 var complexKeys = {
   "a/b": {
     c: 1