Added $(...).map() functionality. (Also closes #1250, imo)

src/jquery/coreTest.js

@@ -976,3 +976,23 @@ test("slice()", function() {
 	isSet( $("#ap a").slice(0,3), q("google", "groups", "anchor1"), "slice(0,3)" );
 	isSet( $("#ap a").slice(-1), q("mark"), "slice(-1)" );
 });
+
+test("map()", function() {
+	expect(2);
+
+	isSet(
+		$("#ap").map(function(){
+			return $(this).find("a").get();
+		}),
+		q("google", "groups", "anchor1", "mark"),
+		"Array Map"
+	);
+
+	isSet(
+		$("#ap > a").map(function(){
+			return this.parentNode;
+		}),
+		q("ap","ap","ap"),
+		"Single Map"
+	);
+});

src/jquery/jquery.js

@@ -1190,6 +1190,12 @@ jQuery.fn = jQuery.prototype = {
 		return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
 	},
 
+	map: function(fn){
+		return this.pushStack(jQuery.map( this, function(elem,i){
+			return fn.call( elem, i, elem );
+		}));
+	},
+	
 	/**
 	 * @private
 	 * @name domManip