Refactor object.js.

src/lang/object.js

@@ -1,22 +1,22 @@
-Object.extend = function(destination, source) {
-  for (var property in source)
-    destination[property] = source[property];
-  return destination;
-};
+(function() {
+  function extend(destination, source) {
+    for (var property in source)
+      destination[property] = source[property];
+    return destination;
+  }
 
-Object.extend(Object, {
-  inspect: function(object) {
+  function inspect(object) {
     try {
-      if (Object.isUndefined(object)) return 'undefined';
+      if (isUndefined(object)) return 'undefined';
       if (object === null) return 'null';
       return object.inspect ? object.inspect() : String(object);
     } catch (e) {
       if (e instanceof RangeError) return '...';
       throw e;
     }
-  },
-  
-  toJSON: function(object) {
+  }
+
+  function toJSON(object) {
     var type = typeof object;
     switch (type) {
       case 'undefined':
@@ -24,73 +24,91 @@ Object.extend(Object, {
       case 'unknown': return;
       case 'boolean': return object.toString();
     }
-    
+
     if (object === null) return 'null';
     if (object.toJSON) return object.toJSON();
-    if (Object.isElement(object)) return;
-    
+    if (isElement(object)) return;
+
     var results = [];
     for (var property in object) {
-      var value = Object.toJSON(object[property]);
-      if (!Object.isUndefined(value))
+      var value = toJSON(object[property]);
+      if (!isUndefined(value))
         results.push(property.toJSON() + ': ' + value);
     }
-    
+
     return '{' + results.join(', ') + '}';
-  },
-  
-  toQueryString: function(object) {
+  }
+
+  function toQueryString(object) {
     return $H(object).toQueryString();
-  },
-  
-  toHTML: function(object) {
+  }
+
+  function toHTML(object) {
     return object && object.toHTML ? object.toHTML() : String.interpret(object);
-  },
-  
-  keys: function(object) {
+  }
+
+  function keys(object) {
     var keys = [];
     for (var property in object)
       keys.push(property);
     return keys;
-  },
-  
-  values: function(object) {
+  }
+
+  function values(object) {
     var values = [];
     for (var property in object)
       values.push(object[property]);
     return values;
-  },
-  
-  clone: function(object) {
-    return Object.extend({ }, object);
-  },
-  
-  isElement: function(object) {
-    return !!(object && object.nodeType == 1);
-  },
-  
-  isArray: function(object) {
-    return object != null && typeof object == "object" &&
-      'splice' in object && 'join' in object;
-  },
-  
-  isHash: function(object) {
-    return object instanceof Hash;
-  },
-  
-  isFunction: function(object) {
-    return typeof object == "function";
-  },
-  
-  isString: function(object) {
-    return typeof object == "string";
-  },
-  
-  isNumber: function(object) {
-    return typeof object == "number";
-  },
-  
-  isUndefined: function(object) {
-    return typeof object == "undefined";
   }
-});
+
+  function clone(object) {
+    return extend({ }, object);
+  }
+
+  function isElement(object) {
+    return !!(object && object.nodeType == 1);
+  }
+
+  function isArray(object) {
+    return object != null && typeof object === "object" &&
+      'splice' in object && 'join' in object;
+  }
+
+  function isHash(object) {
+    return object instanceof Hash;
+  }
+
+  function isFunction(object) {
+    return typeof object === "function";
+  }
+
+  function isString(object) {
+    return typeof object === "string";
+  }
+
+  function isNumber(object) {
+    return typeof object === "number";
+  }
+
+  function isUndefined(object) {
+    return typeof object === "undefined";
+  }
+
+  extend(Object, {
+    extend:        extend,
+    inspect:       inspect,
+    toJSON:        toJSON,
+    toQueryString: toQueryString,
+    toHTML:        toHTML,
+    keys:          keys,
+    values:        values,
+    clone:         clone,
+    isElement:     isElement,
+    isArray:       isArray,
+    isHash:        isHash,
+    isFunction:    isFunction,
+    isString:      isString,
+    isNumber:      isNumber,
+    isUndefined:   isUndefined
+  });
+})();