From 5ddd8d958686c5075b6c58b700f19b4bdea90e1d Mon Sep 17 00:00:00 2001
From: Misko Hevery
Date: Wed, 18 Aug 2010 16:23:12 -0700
Subject: stringify names for better compression, remove dead functions,
 removed underscore.js compatibility

---
 src/Angular.js         | 53 +++++++++++++++++++-----------
 src/Browser.js         |  4 +--
 src/Compiler.js        |  2 +-
 src/JSON.js            | 28 ++++++++--------
 src/Parser.js          | 87 ++++----------------------------------------------
 src/Resource.js        |  2 +-
 src/Scope.js           | 40 +++++++++++------------
 src/apis.js            | 44 ++++++++-----------------
 src/directives.js      | 10 +++---
 src/filters.js         |  2 +-
 src/formatters.js      |  6 ++--
 src/jqLite.js          |  8 ++---
 src/markups.js         |  6 ++--
 src/scenario/Future.js |  2 +-
 src/scenario/Runner.js |  6 ++--
 src/services.js        | 22 ++++++-------
 src/validators.js      | 26 +++++++--------
 src/widgets.js         | 16 +++++-----
 18 files changed, 145 insertions(+), 219 deletions(-)

(limited to 'src')

diff --git a/src/Angular.js b/src/Angular.js
index 4c2e3716..3f248849 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -1,25 +1,42 @@
 ////////////////////////////////////
 
-if (typeof document.getAttribute == 'undefined')
+if (typeof document.getAttribute == $undefined)
   document.getAttribute = function() {};
 
-var consoleNode,
-    NULL              = null,
-    UNDEFIEND         = undefined,
+var _undefined        = undefined,
+    _null             = null,
+    $$element         = '$element',
+    $angular          = 'angular',
+    $array            = 'array',
+    $boolean          = 'boolean',
+    $console          = 'console',
+    $date             = 'date',
+    $display          = 'display',
+    $element          = 'element',
+    $function         = 'function',
+    $length           = 'length',
+    $name             = 'name',
+    $none             = 'none',
+    $noop             = 'noop',
+    $null             = 'null',
+    $number           = 'number',
+    $object           = 'object',
+    $string           = 'string',
+    $undefined        = 'undefined',
+    NG_EXCEPTION      = 'ng-exception',
+    NG_VALIDATION_ERROR = 'ng-validation-error',
+    NOOP              = 'noop',
     PRIORITY_FIRST    = -99999,
     PRIORITY_WATCH    = -1000,
     PRIORITY_LAST     =  99999,
     PRIORITY          = {'FIRST': PRIORITY_FIRST, 'LAST': PRIORITY_LAST, 'WATCH':PRIORITY_WATCH},
-    NOOP              = 'noop',
-    NG_EXCEPTION      = 'ng-exception',
-    NG_VALIDATION_ERROR = 'ng-validation-error',
     jQuery            = window['jQuery'] || window['$'], // weirdness to make IE happy
     _                 = window['_'],
     msie              = !!/(msie) ([\w.]+)/.exec(lowercase(navigator.userAgent)),
     jqLite            = jQuery || jqLiteWrap,
     slice             = Array.prototype.slice,
-    error             = window['console'] ? bind(window['console'], window['console']['error'] || noop) : noop,
-    angular           = window['angular']    || (window['angular'] = {}),
+    error             = window[$console] ? bind(window[$console], window[$console]['error'] || noop) : noop,
+    angular           = window[$angular]    || (window[$angular] = {}),
     angularTextMarkup = extensionMap(angular, 'markup'),
     angularAttrMarkup = extensionMap(angular, 'attrMarkup'),
     angularDirective  = extensionMap(angular, 'directive'),
@@ -36,7 +53,7 @@ function foreach(obj, iterator, context) {
   if (obj) {
     if (isFunction(obj)){
       for (key in obj) {
-        if (key != 'prototype' && key != 'length' && key != 'name' && obj.hasOwnProperty(key)) {
+        if (key != 'prototype' && key != $length && key != $name && obj.hasOwnProperty(key)) {
           iterator.call(context, obj[key], key);
         }
       }
@@ -93,7 +110,7 @@ function extensionMap(angular, name, transform) {
 }
 
 function jqLiteWrap(element) {
-  // for some reasons the parentNode of an orphan looks like null but its typeof is object.
+  // for some reasons the parentNode of an orphan looks like _null but its typeof is object.
   if (element) {
     if (isString(element)) {
       var div = document.createElement('div');
@@ -105,13 +122,13 @@ function jqLiteWrap(element) {
   }
   return element;
 }
-function isUndefined(value){ return typeof value == 'undefined'; }
-function isDefined(value){ return typeof value != 'undefined'; }
-function isObject(value){ return value!=null && typeof value == 'object';}
+function isUndefined(value){ return typeof value == $undefined; }
+function isDefined(value){ return typeof value != $undefined; }
+function isObject(value){ return value!=_null && typeof value == 'object';}
 function isString(value){ return typeof value == 'string';}
 function isNumber(value){ return typeof value == 'number';}
 function isArray(value) { return value instanceof Array; }
-function isFunction(value){ return typeof value == 'function';}
+function isFunction(value){ return typeof value == $function;}
 function isTextNode(node) { return nodeName(node) == '#text'; }
 function lowercase(value){ return isString(value) ? value.toLowerCase() : value; }
 function uppercase(value){ return isString(value) ? value.toUpperCase() : value; }
@@ -295,7 +312,7 @@ function escapeAttr(html) {
 
 function bind(self, fn) {
   var curryArgs = arguments.length > 2 ? slice.call(arguments, 2, arguments.length) : [];
-  if (typeof fn == 'function') {
+  if (typeof fn == $function) {
     return curryArgs.length ? function() {
       return arguments.length ? fn.apply(self, curryArgs.concat(slice.call(arguments, 0, arguments.length))) : fn.apply(self, curryArgs);
     }: function() {
@@ -321,7 +338,7 @@ function merge(src, dst) {
   for ( var key in src) {
     var value = dst[key];
     var type = typeof value;
-    if (type == 'undefined') {
+    if (type == $undefined) {
       dst[key] = fromJson(toJson(src[key]));
     } else if (type == 'object' && value.constructor != array &&
         key.substring(0, 1) != "$") {
@@ -361,7 +378,7 @@ function toKeyValue(obj) {
 function angularInit(config){
   if (config.autobind) {
     // TODO default to the source of angular.js
-    var scope = compile(window.document, null, {'$config':config});
+    var scope = compile(window.document, _null, {'$config':config});
     if (config.css)
       scope.$browser.addCss(config.base_url + config.css);
     scope.$init();
diff --git a/src/Browser.js b/src/Browser.js
index b4314e2c..46ac2bb0 100644
--- a/src/Browser.js
+++ b/src/Browser.js
@@ -57,7 +57,7 @@ Browser.prototype = {
   xhr: function(method, url, post, callback){
     if (isFunction(post)) {
       callback = post;
-      post = null;
+      post = _null;
     }
     if (lowercase(method) == 'json') {
       var callbackId = "angular_" + Math.random() + '_' + (this.idCounter++);
@@ -67,7 +67,7 @@ Browser.prototype = {
       script.src = url.replace('JSON_CALLBACK', callbackId);
       this.head.append(script);
       window[callbackId] = function(data){
-        window[callbackId] = undefined;
+        window[callbackId] = _undefined;
         callback(200, data);
       };
     } else {
diff --git a/src/Compiler.js b/src/Compiler.js
index e09f1876..c45dd46e 100644
--- a/src/Compiler.js
+++ b/src/Compiler.js
@@ -181,7 +181,7 @@ Compiler.prototype = {
         template.addChild(i, self.templatize(child, i, priority));
       });
     }
-    return template.empty() ? null : template;
+    return template.empty() ? _null : template;
   }
 };
 
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();
   }
 }
diff --git a/src/Parser.js b/src/Parser.js
index 5eb75713..bec1b13a 100644
--- a/src/Parser.js
+++ b/src/Parser.js
@@ -7,10 +7,10 @@ function Lexer(text, parsStrings){
 }
 
 Lexer.OPERATORS = {
-    'null':function(self){return null;},
+    'null':function(self){return _null;},
     'true':function(self){return true;},
     'false':function(self){return false;},
-    'undefined':noop,
+    $undefined:noop,
     '+':function(self, a,b){return (isDefined(a)?a:0)+(isDefined(b)?b:0);},
     '-':function(self, a,b){return (isDefined(a)?a:0)-(isDefined(b)?b:0);},
     '*':function(self, a,b){return a*b;},
@@ -490,7 +490,7 @@ Parser.prototype = {
       if (instance)
         instance = instance[key];
     }
-    if (typeof instance != 'function') {
+    if (typeof instance != $function) {
       throw "Function '" + token.text + "' at column '" +
       (token.index+1)  + "' in '" + this.text + "' is not defined.";
     }
@@ -507,10 +507,6 @@ Parser.prototype = {
       primary = this.arrayDeclaration();
     } else if (this.expect('{')) {
       primary = this.object();
-    } else if (this.expect('{:')) {
-      primary = this.closure(false);
-    } else if (this.expect('{(')) {
-      primary = this.closure(true);
     } else {
       var token = this.expect();
       primary = token.fn;
@@ -533,32 +529,6 @@ Parser.prototype = {
     return primary;
   },
 
-  closure: function(hasArgs) {
-    var args = [];
-    if (hasArgs) {
-      if (!this.expect(')')) {
-        args.push(this.expect().text);
-        while(this.expect(',')) {
-          args.push(this.expect().text);
-        }
-        this.consume(')');
-      }
-      this.consume(":");
-    }
-    var statements = this.statements();
-    this.consume("}");
-    return function(self) {
-      return function($){
-        var scope = createScope(self);
-        scope['$'] = $;
-        for ( var i = 0; i < args.length; i++) {
-          setter(scope, args[i], arguments[i]);
-        }
-        return statements(scope);
-      };
-    };
-  },
-
   fieldAccess: function(object) {
     var field = this.expect().text;
     var getter = getterFn(field);
@@ -581,7 +551,7 @@ Parser.prototype = {
       return function (self){
         var o = obj(self);
         var i = indexFn(self);
-        return (o) ? o[i] : undefined;
+        return (o) ? o[i] : _undefined;
       };
     }
   },
@@ -601,8 +571,8 @@ Parser.prototype = {
       }
     var fnPtr = fn(self) || noop;
     // IE stupidity!
-    return fnPtr.apply ? 
-      fnPtr.apply(self, args) : 
+    return fnPtr.apply ?
+      fnPtr.apply(self, args) :
       fnPtr(args[0], args[1], args[2], args[3], args[4]);
     };
   },
@@ -648,51 +618,6 @@ Parser.prototype = {
     };
   },
 
-  entityDeclaration: function () {
-    var decl = [];
-    while(this.hasTokens()) {
-      decl.push(this.entityDecl());
-      if (!this.expect(';')) {
-        this.assertAllConsumed();
-      }
-    }
-    return function (self){
-      var code = "";
-      for ( var i = 0; i < decl.length; i++) {
-        code += decl[i](self);
-      }
-      return code;
-    };
-  },
-
-  entityDecl: function () {
-    var entity = this.expect().text;
-    var instance;
-    var defaults;
-    if (this.expect('=')) {
-      instance = entity;
-      entity = this.expect().text;
-    }
-    if (this.expect(':')) {
-      defaults = this.primary()(null);
-    }
-    return function(self) {
-      var Entity = self.datastore.entity(entity, defaults);
-      setter(self, entity, Entity);
-      if (instance) {
-        var document = Entity();
-        document['$$anchor'] = instance;
-        setter(self, instance, document);
-        return "$anchor." + instance + ":{" +
-            instance + "=" + entity + ".load($anchor." + instance + ");" +
-            instance + ".$$anchor=" + angular['String']['quote'](instance) + ";" +
-          "};";
-      } else {
-        return "";
-      }
-    };
-  },
-
   watch: function () {
     var decl = [];
     while(this.hasTokens()) {
diff --git a/src/Resource.js b/src/Resource.js
index f4f26ebd..03718b5e 100644
--- a/src/Resource.js
+++ b/src/Resource.js
@@ -124,7 +124,7 @@ ResourceFactory.prototype = {
           var callback = noop;
           switch(arguments.length) {
           case 2: params = a1; callback = a2;
-          case 1: if (typeof a1 == 'function') callback = a1; else params = a1;
+          case 1: if (typeof a1 == $function) callback = a1; else params = a1;
           case 0: break;
           default:
             throw "Expected between 1-2 arguments [params, callback], got " + arguments.length + " arguments.";
diff --git a/src/Scope.js b/src/Scope.js
index 27fafc3a..a2ee07d9 100644
--- a/src/Scope.js
+++ b/src/Scope.js
@@ -15,7 +15,7 @@ function getter(instance, path, unboundFn) {
     if (isUndefined(instance)  && key.charAt(0) == '$') {
       var type = angular['Global']['typeOf'](lastInstance);
       type = angular[type.charAt(0).toUpperCase()+type.substring(1)];
-      var fn = type ? type[[key.substring(1)]] : undefined;
+      var fn = type ? type[[key.substring(1)]] : _undefined;
       if (fn) {
         instance = bind(lastInstance, fn, lastInstance);
         return instance;
@@ -50,37 +50,37 @@ var scopeId = 0;
     JS_KEYWORDS = {};
 foreach(
    ["abstract", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue", "debugger", "default",
-    "delete", "do", "double", "else", "enum", "export", "extends", "false", "final", "finally", "float", "for", "function", "goto",
-    "if", "implements", "import", "ininstanceof", "intinterface", "long", "native", "new", "null", "package", "private",
+    "delete", "do", "double", "else", "enum", "export", "extends", "false", "final", "finally", "float", "for", $function, "goto",
+    "if", "implements", "import", "ininstanceof", "intinterface", "long", "native", "new", $null, "package", "private",
     "protected", "public", "return", "short", "static", "super", "switch", "synchronized", "this", "throw", "throws",
-    "transient", "true", "try", "typeof", "var", "volatile", "void", "while", "with"],
+    "transient", "true", "try", "typeof", "var", "volatile", "void", $undefined, "while", "with"],
   function(key){ JS_KEYWORDS[key] = true;}
 );
 function getterFn(path){
   var fn = getterFnCache[path];
   if (fn) return fn;
 
-  var code = 'function (self){\n';
-  code += '  var last, fn, type;\n';
+  var code = 'function (s){\n';
+  code += '  var l, fn, t;\n';
   foreach(path.split('.'), function(key) {
     key = (JS_KEYWORDS[key]) ? '["' + key + '"]' : '.' + key;
-    code += '  if(!self) return self;\n';
-    code += '  last = self;\n';
-    code += '  self = self' + key + ';\n';
-    code += '  if(typeof self == "function") \n';
-    code += '    self = function(){ return last'+key+'.apply(last, arguments); };\n';
+    code += '  if(!s) return s;\n';
+    code += '  l = s;\n';
+    code += '  s = s' + key + ';\n';
+    code += '  if(typeof s == "'+$function+'") \n';
+    code += '    s = function(){ return l'+key+'.apply(l, arguments); };\n';
     if (key.charAt(1) == '$') {
       // special code for super-imposed functions
       var name = key.substr(2);
-      code += '  if(!self) {\n';
-      code += '    type = angular.Global.typeOf(last);\n';
-      code += '    fn = (angular[type.charAt(0).toUpperCase() + type.substring(1)]||{})["' + name + '"];\n';
+      code += '  if(!s) {\n';
+      code += '    t = angular.Global.typeOf(l);\n';
+      code += '    fn = (angular[t.charAt(0).toUpperCase() + t.substring(1)]||{})["' + name + '"];\n';
       code += '    if (fn)\n';
-      code += '      self = function(){ return fn.apply(last, [last].concat(Array.prototype.slice.call(arguments, 0, arguments.length))); };\n';
+      code += '      s = function(){ return fn.apply(l, [l].concat(Array.prototype.slice.call(arguments, 0, arguments.length))); };\n';
       code += '  }\n';
     }
   });
-  code += '  return self;\n}';
+  code += '  return s;\n}';
   fn = eval('fn = ' + code);
   fn["toString"] = function(){ return code; };
 
@@ -90,7 +90,7 @@ function getterFn(path){
 ///////////////////////////////////
 
 function expressionCompile(exp){
-  if (typeof exp === 'function') return exp;
+  if (typeof exp === $function) return exp;
   var fn = compileCache[exp];
   if (!fn) {
     var parser = new Parser(exp);
@@ -130,7 +130,7 @@ function createScope(parent, services, existing) {
 
     $eval: function $eval(exp) {
       var type = typeof exp;
-      if (type == 'undefined') {
+      if (type == $undefined) {
         for ( var i = 0, iSize = evalLists.sorted.length; i < iSize; i++) {
           for ( var queue = evalLists.sorted[i],
               jSize = queue.length,
@@ -138,7 +138,7 @@ function createScope(parent, services, existing) {
             instance.$tryEval(queue[j].fn, queue[j].handler);
           }
         }
-      } else if (type === 'function') {
+      } else if (type === $function) {
         return exp.call(instance);
       } else  if (type === 'string') {
         return expressionCompile(exp).call(instance);
@@ -148,7 +148,7 @@ function createScope(parent, services, existing) {
     $tryEval: function (expression, exceptionHandler) {
       var type = typeof expression;
       try {
-        if (type == 'function') {
+        if (type == $function) {
           return expression.call(instance);
         } else if (type == 'string'){
           return expressionCompile(expression).call(instance);
diff --git a/src/apis.js b/src/apis.js
index 0cf24016..764c35ea 100644
--- a/src/apis.js
+++ b/src/apis.js
@@ -1,11 +1,11 @@
 var angularGlobal = {
   'typeOf':function(obj){
-    if (obj === null) return "null";
+    if (obj === _null) return $null;
     var type = typeof obj;
-    if (type == "object") {
-      if (obj instanceof Array) return "array";
-      if (obj instanceof Date) return "date";
-      if (obj.nodeType == 1) return "element";
+    if (type == $object) {
+      if (obj instanceof Array) return $array;
+      if (obj instanceof Date) return $date;
+      if (obj.nodeType == 1) return $element;
     }
     return type;
   }
@@ -102,7 +102,7 @@ var angularArray = {
           }
         }
         break;
-      case "function":
+      case $function:
         predicates.push(expression);
         break;
       default:
@@ -236,34 +236,18 @@ var angularFunction = {
   }
 };
 
-function defineApi(dst, chain, underscoreNames){
-  if (_) {
-    var lastChain = _.last(chain);
-    foreach(underscoreNames, function(name){
-      lastChain[name] = _[name];
-    });
-  }
+function defineApi(dst, chain){
   angular[dst] = angular[dst] || {};
   foreach(chain, function(parent){
     extend(angular[dst], parent);
   });
 }
-defineApi('Global', [angularGlobal],
-    ['extend', 'clone','isEqual',
-     'isElement', 'isArray', 'isFunction', 'isUndefined']);
-defineApi('Collection', [angularGlobal, angularCollection],
-    ['each', 'map', 'reduce', 'reduceRight', 'detect',
-     'select', 'reject', 'all', 'any', 'include',
-     'invoke', 'pluck', 'max', 'min', 'sortBy',
-     'sortedIndex', 'toArray', 'size']);
-defineApi('Array', [angularGlobal, angularCollection, angularArray],
-    ['first', 'last', 'compact', 'flatten', 'without',
-     'uniq', 'intersect', 'zip', 'indexOf', 'lastIndexOf']);
-defineApi('Object', [angularGlobal, angularCollection, angularObject],
-    ['keys', 'values']);
-defineApi('String', [angularGlobal, angularString], []);
-defineApi('Date', [angularGlobal, angularDate], []);
+defineApi('Global', [angularGlobal]);
+defineApi('Collection', [angularGlobal, angularCollection]);
+defineApi('Array', [angularGlobal, angularCollection, angularArray]);
+defineApi('Object', [angularGlobal, angularCollection, angularObject]);
+defineApi('String', [angularGlobal, angularString]);
+defineApi('Date', [angularGlobal, angularDate]);
 //IE bug
 angular['Date']['toString'] = angularDate['toString'];
-defineApi('Function', [angularGlobal, angularCollection, angularFunction],
-    ['bind', 'bindAll', 'delay', 'defer', 'wrap', 'compose']);
+defineApi('Function', [angularGlobal, angularCollection, angularFunction]);
diff --git a/src/directives.js b/src/directives.js
index 9aadbd11..8599d01d 100644
--- a/src/directives.js
+++ b/src/directives.js
@@ -27,7 +27,7 @@ angularDirective("ng:bind", function(expression){
     var lastValue = noop, lastError = noop;
     this.$onEval(function() {
       var error, value, isHtml, isDomElement,
-          oldElement = this.hasOwnProperty('$element') ? this.$element : undefined;
+          oldElement = this.hasOwnProperty($$element) ? this.$element : _undefined;
       this.$element = element;
       value = this.$tryEval(expression, function(e){
         error = toJson(e);
@@ -76,7 +76,7 @@ function compileBindTemplate(template){
     });
     bindTemplateCache[template] = fn = function(element){
       var parts = [], self = this,
-         oldElement = this.hasOwnProperty('$element') ? self.$element : undefined;
+         oldElement = this.hasOwnProperty($$element) ? self.$element : _undefined;
       self.$element = element;
       for ( var i = 0; i < bindings.length; i++) {
         var value = bindings[i].call(self, element);
@@ -242,7 +242,7 @@ angularDirective("ng:class-even", ngClass(function(i){return i % 2 === 1;}));
 angularDirective("ng:show", function(expression, element){
   return function(element){
     this.$onEval(function(){
-      element.css('display', toBoolean(this.$eval(expression)) ? '' : 'none');
+      element.css($display, toBoolean(this.$eval(expression)) ? '' : $none);
     }, element);
   };
 });
@@ -250,7 +250,7 @@ angularDirective("ng:show", function(expression, element){
 angularDirective("ng:hide", function(expression, element){
   return function(element){
     this.$onEval(function(){
-      element.css('display', toBoolean(this.$eval(expression)) ? 'none' : '');
+      element.css($display, toBoolean(this.$eval(expression)) ? $none : '');
     }, element);
   };
 });
@@ -261,7 +261,7 @@ angularDirective("ng:style", function(expression, element){
     this.$onEval(function(){
       var style = this.$eval(expression) || {}, key, mergedStyle = {};
       for(key in style) {
-        if (resetStyle[key] === undefined) resetStyle[key] = '';
+        if (resetStyle[key] === _undefined) resetStyle[key] = '';
         mergedStyle[key] = style[key];
       }
       for(key in resetStyle) {
diff --git a/src/filters.js b/src/filters.js
index 27e3deca..f1fc89f1 100644
--- a/src/filters.js
+++ b/src/filters.js
@@ -7,7 +7,7 @@ angularFilter.number = function(amount, fractionSize){
   if (isNaN(amount) || !isFinite(amount)) {
     return '';
   }
-  fractionSize = typeof fractionSize == 'undefined' ? 2 : fractionSize;
+  fractionSize = typeof fractionSize == $undefined ? 2 : fractionSize;
   var isNegative = amount < 0;
   amount = Math.abs(amount);
   var pow = Math.pow(10, fractionSize);
diff --git a/src/formatters.js b/src/formatters.js
index 5c8764ac..ba57a3ed 100644
--- a/src/formatters.js
+++ b/src/formatters.js
@@ -1,6 +1,6 @@
 function formatter(format, parse) {return {'format':format, 'parse':parse || format};}
 function toString(obj) {
-  return (isDefined(obj) && obj !== null) ? "" + obj : obj;
+  return (isDefined(obj) && obj !== _null) ? "" + obj : obj;
 }
 
 var NUMBER = /^\s*[-+]?\d*(\.\d*)?\s*$/;
@@ -9,8 +9,8 @@ angularFormatter.noop = formatter(identity, identity);
 angularFormatter.json = formatter(toJson, fromJson);
 angularFormatter['boolean'] = formatter(toString, toBoolean);
 angularFormatter.number = formatter(toString, function(obj){
-  if (obj == null || NUMBER.exec(obj)) {
-    return obj===null || obj === '' ? null : 1*obj;
+  if (obj == _null || NUMBER.exec(obj)) {
+    return obj===_null || obj === '' ? _null : 1*obj;
   } else {
     throw "Not a number";
   }
diff --git a/src/jqLite.js b/src/jqLite.js
index 1ad4d96d..5f1b9730 100644
--- a/src/jqLite.js
+++ b/src/jqLite.js
@@ -70,7 +70,7 @@ JQLite.prototype = {
       }
       cache[key] = value;
     } else {
-      return cache ? cache[key] : null;
+      return cache ? cache[key] : _null;
     }
   },
 
@@ -115,7 +115,7 @@ JQLite.prototype = {
 
   trigger: function(type) {
     var evnt = document.createEvent('MouseEvent');
-    evnt.initMouseEvent(type, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
+    evnt.initMouseEvent(type, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, _null);
     this[0].dispatchEvent(evnt);
   },
 
@@ -195,8 +195,8 @@ JQLite.prototype = {
       e.setAttribute(name, value);
     } else {
       var attributes = e.attributes,
-          item = attributes ? attributes.getNamedItem(name) : undefined;
-      return item && item.specified ? item.value : undefined;
+          item = attributes ? attributes.getNamedItem(name) : _undefined;
+      return item && item.specified ? item.value : _undefined;
     }
   },
 
diff --git a/src/markups.js b/src/markups.js
index ac2b5636..27f74518 100644
--- a/src/markups.js
+++ b/src/markups.js
@@ -20,11 +20,11 @@ function parseBindings(string) {
 
 function binding(string) {
   var binding = string.replace(/\n/gm, ' ').match(/^\{\{(.*)\}\}$/);
-  return binding ? binding[1] : null;
+  return binding ? binding[1] : _null;
 }
 
 function hasBindings(bindings) {
-  return bindings.length > 1 || binding(bindings[0]) !== null;
+  return bindings.length > 1 || binding(bindings[0]) !== _null;
 }
 
 angularTextMarkup('{{}}', function(text, textNode, parentElement) {
@@ -61,7 +61,7 @@ angularTextMarkup('{{}}', function(text, textNode, parentElement) {
 angularTextMarkup('OPTION', function(text, textNode, parentElement){
   if (nodeName(parentElement) == "OPTION") {
     var select = document.createElement('select');
-    select.insertBefore(parentElement[0].cloneNode(true), null);
+    select.insertBefore(parentElement[0].cloneNode(true), _null);
     if (!select.innerHTML.match(/<option(\s.*\s|\s)value\s*=\s*.*>.*<\/\s*option\s*>/gi)) {
       parentElement.attr('value', text);
     }
diff --git a/src/scenario/Future.js b/src/scenario/Future.js
index d70e8e6e..cc40eff0 100644
--- a/src/scenario/Future.js
+++ b/src/scenario/Future.js
@@ -2,7 +2,7 @@ function Future(name, behavior) {
   this.name = name;
   this.behavior = behavior;
   this.fulfilled = false;
-  this.value = undefined;
+  this.value = _undefined;
 }
 
 Future.prototype = {
diff --git a/src/scenario/Runner.js b/src/scenario/Runner.js
index ac32559c..d1a9271b 100644
--- a/src/scenario/Runner.js
+++ b/src/scenario/Runner.js
@@ -42,7 +42,7 @@ angular.scenario.Runner = function(scope, jQuery){
     } finally {
       afterEach();
     }
-    self.currentSpec = null;
+    self.currentSpec = _null;
   };
   this.logger = function returnNoop(){
     return extend(returnNoop, {close:noop, fail:noop});
@@ -144,7 +144,7 @@ angular.scenario.Runner.prototype = {
    function done() {
      result.finished = true;
      futureLogger.close();
-     self.self = null;
+     self.self = _null;
      (callback||noop).call(specThis);
    }
    function next(value){
@@ -153,7 +153,7 @@ angular.scenario.Runner.prototype = {
      }
      var future = spec.futures[spec.nextFutureIndex];
      (result.log || {close:noop}).close();
-     result.log = null;
+     result.log = _null;
      if (future) {
        spec.nextFutureIndex ++;
        result.log = futureLogger('future', future.name);
diff --git a/src/services.js b/src/services.js
index a5158149..19375f39 100644
--- a/src/services.js
+++ b/src/services.js
@@ -40,7 +40,7 @@ angularService("$location", function(browser){
   }
 
   function check(param) {
-    return lastLocation[param] == location[param] ? undefined : location[param];
+    return lastLocation[param] == location[param] ? _undefined : location[param];
   }
 
   function checkProtocol(){
@@ -49,9 +49,9 @@ angularService("$location", function(browser){
         lastLocation.port === location.port &&
         lastLocation.path === location.path &&
         equals(lastLocation.search, location.search))
-      return undefined;
+      return _undefined;
     var url = toKeyValue(location.search);
-    var port = (location.port == DEFAULT_PORTS[location.protocol] ? null : location.port);
+    var port = (location.port == DEFAULT_PORTS[location.protocol] ? _null : location.port);
     return location.protocol  + '://' + location.host +
           (port ? ':' + port : '') + location.path +
           (url ? '?' + url : '');
@@ -60,7 +60,7 @@ angularService("$location", function(browser){
   function checkHashPathSearch(){
     if (lastLocation.hashPath === location.hashPath &&
         equals(lastLocation.hashSearch, location.hashSearch) )
-      return undefined;
+      return _undefined;
     var url = toKeyValue(location.hashSearch);
     return escape(location.hashPath) + (url ? '?' + url : '');
   }
@@ -72,7 +72,7 @@ angularService("$location", function(browser){
         location.href = url.replace('#$', '');
         location.protocol = match[1];
         location.host = match[3] || '';
-        location.port = match[5] || DEFAULT_PORTS[location.protocol] || null;
+        location.port = match[5] || DEFAULT_PORTS[location.protocol] || _null;
         location.path = match[6];
         location.search = parseKeyValue(match[8]);
         location.hash = match[10] || '';
@@ -149,7 +149,7 @@ angularService("$hover", function(browser, document) {
       }
     } else if (tooltip) {
       tooltip.callout.remove();
-      tooltip = null;
+      tooltip = _null;
     }
   });
 }, {inject:['$browser', '$document']});
@@ -211,7 +211,7 @@ function switchRouteMatcher(on, when, dstName) {
     });
     if (dstName) this.$set(dstName, dst);
   }
-  return match ? dst : null;
+  return match ? dst : _null;
 }
 
 angularService('$route', function(location){
@@ -234,7 +234,7 @@ angularService('$route', function(location){
       };
   function updateRoute(){
     var childScope;
-    $route.current = null;
+    $route.current = _null;
     angular.foreach(routes, function(routeParams, route) {
       if (!childScope) {
         var pathParams = matcher(location.hashPath, route);
@@ -262,7 +262,7 @@ angularService('$xhr', function($browser, $error, $log){
   return function(method, url, post, callback){
     if (isFunction(post)) {
       callback = post;
-      post = null;
+      post = _null;
     }
     if (post && isObject(post)) {
       post = toJson(post);
@@ -300,7 +300,7 @@ angularService('$xhr.bulk', function($xhr, $error, $log){
   function bulkXHR(method, url, post, callback) {
     if (isFunction(post)) {
       callback = post;
-      post = null;
+      post = _null;
     }
     var currentQueue;
     foreach(bulkXHR.urls, function(queue){
@@ -349,7 +349,7 @@ angularService('$xhr.cache', function($xhr){
   function cache(method, url, post, callback, verifyCache){
     if (isFunction(post)) {
       callback = post;
-      post = null;
+      post = _null;
     }
     if (method == 'GET') {
       var data;
diff --git a/src/validators.js b/src/validators.js
index 5c7fc952..b99c8aa9 100644
--- a/src/validators.js
+++ b/src/validators.js
@@ -1,25 +1,25 @@
 foreach({
-  'noop': function() { return null; },
+  'noop': function() { return _null; },
 
   'regexp': function(value, regexp, msg) {
     if (!value.match(regexp)) {
       return msg ||
         "Value does not match expected format " + regexp + ".";
     } else {
-      return null;
+      return _null;
     }
   },
 
   'number': function(value, min, max) {
     var num = 1 * value;
     if (num == value) {
-      if (typeof min != 'undefined' && num < min) {
+      if (typeof min != $undefined && num < min) {
         return "Value can not be less than " + min + ".";
       }
-      if (typeof min != 'undefined' && num > max) {
+      if (typeof min != $undefined && num > max) {
         return "Value can not be greater than " + max + ".";
       }
-      return null;
+      return _null;
     } else {
       return "Not a number";
     }
@@ -31,43 +31,43 @@ foreach({
     if (!("" + value).match(/^\s*[\d+]*\s*$/) || value != Math.round(value)) {
       return "Not a whole number";
     }
-    return null;
+    return _null;
   },
 
   'date': function(value, min, max) {
     if (value.match(/^\d\d?\/\d\d?\/\d\d\d\d$/)) {
-      return null;
+      return _null;
     }
     return "Value is not a date. (Expecting format: 12/31/2009).";
   },
 
   'ssn': function(value) {
     if (value.match(/^\d\d\d-\d\d-\d\d\d\d$/)) {
-      return null;
+      return _null;
     }
     return "SSN needs to be in 999-99-9999 format.";
   },
 
   'email': function(value) {
     if (value.match(/^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/)) {
-      return null;
+      return _null;
     }
     return "Email needs to be in username@host.com format.";
   },
 
   'phone': function(value) {
     if (value.match(/^1\(\d\d\d\)\d\d\d-\d\d\d\d$/)) {
-      return null;
+      return _null;
     }
     if (value.match(/^\+\d{2,3} (\(\d{1,5}\))?[\d ]+\d$/)) {
-      return null;
+      return _null;
     }
     return "Phone number needs to be in 1(987)654-3210 format in North America or +999 (123) 45678 906 internationaly.";
   },
 
   'url': function(value) {
     if (value.match(/^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/)) {
-      return null;
+      return _null;
     }
     return "URL needs to be in http://server[:port]/path format.";
   },
@@ -75,7 +75,7 @@ foreach({
   'json': function(value) {
     try {
       fromJson(value);
-      return null;
+      return _null;
     } catch (e) {
       return e.toString();
     }
diff --git a/src/widgets.js b/src/widgets.js
index 87a302fa..336813aa 100644
--- a/src/widgets.js
+++ b/src/widgets.js
@@ -6,7 +6,7 @@ function modelAccessor(scope, element) {
       return scope.$eval(expr);
     },
     set: function(value) {
-      if (value !== undefined) {
+      if (value !== _undefined) {
         return scope.$tryEval(expr + '=' + toJson(value), element);
       }
     }
@@ -57,7 +57,7 @@ function valueAccessor(scope, element) {
   return {
     get: function(){
       if (lastError)
-        elementError(element, NG_VALIDATION_ERROR, null);
+        elementError(element, NG_VALIDATION_ERROR, _null);
       try {
         var value = parse(element.val());
         validate();
@@ -80,13 +80,13 @@ function valueAccessor(scope, element) {
   function validate() {
     var value = trim(element.val());
     if (element[0].disabled || element[0].readOnly) {
-      elementError(element, NG_VALIDATION_ERROR, null);
+      elementError(element, NG_VALIDATION_ERROR, _null);
       invalidWidgets.markValid(element);
     } else {
       var error, validateScope = inherit(scope, {$element:element});
       error = required && !value ?
               'Required' :
-              (value ? validator(validateScope, value) : null);
+              (value ? validator(validateScope, value) : _null);
       elementError(element, NG_VALIDATION_ERROR, error);
       lastError = error;
       if (error) {
@@ -114,7 +114,7 @@ function radioAccessor(scope, element) {
   var domElement = element[0];
   return {
     get: function(){
-      return domElement.checked ? domElement.value : null;
+      return domElement.checked ? domElement.value : _null;
     },
     set: function(value){
       domElement.checked = value == domElement.value;
@@ -157,7 +157,7 @@ var textWidget = inputWidget('keyup change', modelAccessor, valueAccessor, initW
       'image':           buttonWidget,
       'checkbox':        inputWidget('click', modelFormattedAccessor, checkedAccessor, initWidgetValue(false)),
       'radio':           inputWidget('click', modelFormattedAccessor, radioAccessor, radioInit),
-      'select-one':      inputWidget('change', modelFormattedAccessor, valueAccessor, initWidgetValue(null)),
+      'select-one':      inputWidget('change', modelFormattedAccessor, valueAccessor, initWidgetValue(_null)),
       'select-multiple': inputWidget('change', modelFormattedAccessor, optionsAccessor, initWidgetValue([]))
 //      'file':            fileWidget???
     };
@@ -179,9 +179,9 @@ function radioInit(model, view, element) {
  input.checked = false;
  input.name = this.$id + '@' + input.name;
  if (isUndefined(modelValue)) {
-   model.set(modelValue = null);
+   model.set(modelValue = _null);
  }
- if (modelValue == null && viewValue !== null) {
+ if (modelValue == _null && viewValue !== _null) {
    model.set(viewValue);
  }
  view.set(modelValue);
-- 
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