1 files changed, 14 insertions, 14 deletions

diff --git a/src/JSON.js b/src/JSON.js
index 0311c317..6fb43f0f 100644
--- a/src/JSON.js
+++ b/src/JSON.js
@@ -2,7 +2,7 @@ var array = [].constructor;
 
 function toJson(obj, pretty){
   var buf = [];
-  toJsonArray(buf, obj, pretty ? "\n  " : null, []);
+  toJsonArray(buf, obj, pretty ? "\n  " : _null, []);
   return buf.join('');
 }
 
@@ -31,21 +31,21 @@ function toJsonArray(buf, obj, pretty, stack){
     stack.push(obj);
   }
   var type = typeof obj;
-  if (obj === null) {
-    buf.push("null");
-  } else if (type === 'function') {
+  if (obj === _null) {
+    buf.push($null);
+  } else if (type === $function) {
     return;
-  } else if (type === 'boolean') {
+  } else if (type === $boolean) {
     buf.push('' + obj);
-  } else if (type === 'number') {
+  } else if (type === $number) {
     if (isNaN(obj)) {
-      buf.push('null');
+      buf.push($null);
     } else {
       buf.push('' + obj);
     }
-  } else if (type === 'string') {
+  } else if (type === $string) {
     return buf.push(angular['String']['quoteUnicode'](obj));
-  } else if (type === 'object') {
+  } else if (type === $object) {
     if (obj instanceof Array) {
       buf.push("[");
       var len = obj.length;
@@ -53,8 +53,8 @@ function toJsonArray(buf, obj, pretty, stack){
       for(var i=0; i<len; i++) {
         var item = obj[i];
         if (sep) buf.push(",");
-        if (typeof item == 'function' || typeof item == 'undefined') {
-          buf.push("null");
+        if (typeof item == $function || typeof item == $undefined) {
+          buf.push($null);
         } else {
           toJsonArray(buf, item, pretty, stack);
         }
@@ -70,7 +70,7 @@ function toJsonArray(buf, obj, pretty, stack){
       var childPretty = pretty ? pretty + "  " : false;
       var keys = [];
       for(var k in obj) {
-        if (!obj.hasOwnProperty(k) || k.indexOf('$$') === 0 || obj[k] === undefined)
+        if (!obj.hasOwnProperty(k) || k.indexOf('$$') === 0 || obj[k] === _undefined)
           continue;
         keys.push(k);
       }
@@ -79,7 +79,7 @@ function toJsonArray(buf, obj, pretty, stack){
         var key = keys[keyIndex];
         try {
           var value = obj[key];
-          if (typeof value != 'function') {
+          if (typeof value != $function) {
             if (comma) {
               buf.push(",");
               if (pretty) buf.push(pretty);
@@ -95,7 +95,7 @@ function toJsonArray(buf, obj, pretty, stack){
       buf.push("}");
     }
   }
-  if (typeof obj == "object") {
+  if (typeof obj == $object) {
     stack.pop();
   }
 }