- replaced some instances of $defined with a simpler check.

 - small fix for selectors documentation

git-svn-id: http://svn.mootools.net/trunk@1532 4db308c1-fb21-0410-9919-de62e267375e

Docs/Utilities/Selectors.md

@@ -10,12 +10,11 @@ Gets all the elements within an element that match the given selector.
 
 ### Syntax:
 
-	var myElements = myElement.getElements(selector[, nocash]);
+	var myElements = myElement.getElements(selector);
 
 ### Arguments:
 
 1. selector - (*string*) The CSS Selector to match.
-2. nocash   - (*boolean*, optional: defaults to false) If true, the found Elements are not extended.
 
 ### Returns:
 

Source/Core/Core.js

@@ -176,7 +176,7 @@ function $merge(){
 
 function $pick(){
 	for (var i = 0, l = arguments.length; i < l; i++){
-		if ($defined(arguments[i])) return arguments[i];
+		if (arguments[i] != undefined) return arguments[i];
 	}
 	return null;
 };

Source/Native/Function.js

@@ -18,7 +18,7 @@ Function.implement({
 		options = options || {};
 		return function(event){
 			var args = options.arguments;
-			args = $defined(args) ? $splat(args) : Array.slice(arguments, (options.event) ? 1 : 0);
+			args = (args != undefined) ? $splat(args) : Array.slice(arguments, (options.event) ? 1 : 0);
 			if (options.event) args = [event || window.event].extend(args);
 			var returns = function(){
 				return self.apply(options.bind || null, args);

Source/Native/Hash.js

@@ -58,7 +58,7 @@ Hash.implement({
 
 	include: function(key, value){
 		var k = this[key];
-		if (!$defined(k)) this[key] = value;
+		if (k == undefined) this[key] = value;
 		return this;
 	},