X-Git-Url: http://git.asbjorn.it/?a=blobdiff_plain;f=src%2Fcore.js;h=2a064c27eb2400017d57151bc2b9189b5e0e1ab4;hb=0d5c3a68a092401089c9242bdafdb1b2534feb6a;hp=6f8d40ff4a2772e5b599640170ddbc90369d1869;hpb=8d52c27808a77f51d1cf42c7e738b0b356466c1a;p=jquery.git

diff --git a/src/core.js b/src/core.js
index 6f8d40f..2a064c2 100644
--- a/src/core.js
+++ b/src/core.js
@@ -39,16 +39,12 @@ jQuery.fn = jQuery.prototype = {
 		var match, elem, ret;
 
 		// Handle $(""), $(null), or $(undefined)
-		if ( !selector ) {
-			this.length = 0;
-			return this;
-		}
+		if ( !selector ) return this;
 
 		// Handle $(DOMElement)
 		if ( selector.nodeType ) {
-			this[0] = selector;
-			this.length = 1;
-			this.context = selector;
+			this.context = this[0] = selector;
+			this.length++;
 			return this;
 		}
 
@@ -68,17 +64,16 @@ jQuery.fn = jQuery.prototype = {
 				} else {
 					elem = document.getElementById( match[3] );
 
-					// Handle the case where IE and Opera return items
-					// by name instead of ID
-					if ( elem && elem.id !== match[3] ) {
-						return rootjQuery.find( selector );
-					}
-
-					// Otherwise, we inject the element directly into the jQuery object
-					this.length = elem ? 1 : 0;
 					if ( elem ) {
+						// Handle the case where IE and Opera return items
+						// by name instead of ID
+						if ( elem.id !== match[3] ) return rootjQuery.find( selector );
+
+						// Otherwise, we inject the element directly into the jQuery object
+						this.length++;
 						this[0] = elem;
 					}
+
 					this.context = document;
 					this.selector = selector;
 					return this;
@@ -117,6 +112,9 @@ jQuery.fn = jQuery.prototype = {
 	// The current version of jQuery being used
 	jquery: "@VERSION",
 
+	// The default length of a jQuery object is 0
+	length: 0,
+
 	// The number of elements contained in the matched element set
 	size: function() {
 		return this.length;
@@ -133,7 +131,7 @@ jQuery.fn = jQuery.prototype = {
 			this.toArray() :
 
 			// Return just the object
-			( num < 0 ? this.toArray.call(this, num)[0] : this[ num ] );
+			( num < 0 ? this.toArray(num)[ 0 ] : this[ num ] );
 	},
 
 	// Take an array of elements and push it onto the stack
@@ -243,9 +241,15 @@ jQuery.extend = jQuery.fn.extend = function() {
 
 				// Recurse if we're merging object values
 				if ( deep && copy && typeof copy === "object" && !copy.nodeType ) {
-					target[ name ] = jQuery.extend( deep,
-						// Never move original objects, clone them
-						src || ( jQuery.isArray(copy) ? [ ] : { } ), copy );
+					var clone;
+
+					if( src ) clone = src;
+					else if( jQuery.isArray(copy) ) clone = [ ];
+					else if( jQuery.isObject(copy) ) clone = { };
+					else clone = copy;
+
+					// Never move original objects, clone them
+					target[ name ] = jQuery.extend( deep, clone, copy );
 
 				// Don't bring in undefined values
 				} else if ( copy !== undefined ) {
@@ -281,6 +285,16 @@ jQuery.extend({
 		return toString.call(obj) === "[object Array]";
 	},
 
+	isObject: function( obj ) {
+		return this.constructor.call(obj) === Object;
+	},
+
+	isEmptyObject: function( obj ) {
+		for(var name in obj)
+			return false;
+		return true;
+	},
+
 	// check if an element is in a (or is an) XML document
 	isXMLDoc: function( elem ) {
 		return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
@@ -460,7 +474,7 @@ jQuery.extend({
 	// It's included for backwards compatibility and plugins,
 	// although they should work to migrate away.
 	browser: {
-		version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
+		version: (/.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/.exec(userAgent) || [0,'0'])[1],
 		safari: /webkit/.test( userAgent ),
 		opera: /opera/.test( userAgent ),
 		msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),