Cut down on some more function calls for jQuery(...). Everything points back to the...

diff --git a/src/core.js b/src/core.js
index a67b5f0..d99f401 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -10,7 +10,9 @@ var
 
        jQuery = window.jQuery = window.$ = function( selector, context ) {
                // The jQuery object is actually just the init constructor 'enhanced'
-               return new jQuery.fn.init( selector, context );
+               return selector === undefined ?
+                       rootjQuery :
+                       new jQuery.fn.init( selector, context );
        },
 
        // A simple way to check for HTML strings or ID strings
@@ -21,15 +23,9 @@ var
 
 jQuery.fn = jQuery.prototype = {
        init: function( selector, context ) {
-               // Make sure that a selection was provided
-               if ( selector === undefined ) {
-                       selector = document;
-               }
-
-               // Handle "", null
+               // Handle $("") or $(null)
                if ( !selector ) {
                        this.length = 0;
-                       this.context = document;
                        return this;
                }
 
@@ -60,32 +56,30 @@ jQuery.fn = jQuery.prototype = {
                                        // Handle the case where IE and Opera return items
                                        // by name instead of ID
                                        if ( elem && elem.id != match[3] ) {
-                                               return jQuery().find( selector );
+                                               return rootjQuery.find( selector );
                                        }
 
                                        // Otherwise, we inject the element directly into the jQuery object
-                                       var ret = jQuery( elem || [] );
+                                       var ret = jQuery( elem || null );
                                        ret.context = document;
                                        ret.selector = selector;
                                        return ret;
                                }
 
-                       // HANDLE: $(expr, [context])
-                       // (which is just equivalent to: $(content).find(expr)
-                       } else if ( !context || context.nodeType ) {
-                               this[0] = context || document;
-                               this.length = 1;
-                               this.context = context;
-                               return this.find( selector );
+                       // HANDLE: $(expr, $(...))
+                       } else if ( !context || context.jquery ) {
+                               return (context || rootjQuery).find( selector );
 
+                       // HANDLE: $(expr, context)
+                       // (which is just equivalent to: $(content).find(expr)
                        } else {
-                               return (context.jquery ? context : jQuery( context )).find( selector );
+                               return jQuery( context ).find( selector );
                        }
 
                // HANDLE: $(function)
                // Shortcut for document ready
                } else if ( jQuery.isFunction( selector ) ) {
-                       return jQuery( document ).ready( selector );
+                       return rootjQuery.ready( selector );
                }
 
                // Make sure that old selector state is passed along
@@ -126,7 +120,7 @@ jQuery.fn = jQuery.prototype = {
        // (returning the new matched element set)
        pushStack: function( elems, name, selector ) {
                // Build a new jQuery matched element set
-               var ret = jQuery( elems );
+               var ret = jQuery( elems || null );
 
                // Add the old object onto the stack (as a reference)
                ret.prevObject = this;
@@ -282,7 +276,7 @@ jQuery.fn = jQuery.prototype = {
        },
 
        end: function() {
-               return this.prevObject || jQuery( [] );
+               return this.prevObject || jQuery(null);
        },
 
        // For internal use only.
@@ -1164,6 +1158,9 @@ jQuery.extend({
        }
 });
 
+// All jQuery objects should point back to these
+var rootjQuery = jQuery(document);
+
 // Use of jQuery.browser is deprecated.
 // It's included for backwards compatibility and plugins,
 // although they should work to migrate away.