Just another update

Task/Optional-parameters/Groovy/optional-parameters-3.groovy

@@ -0,0 +1,7 @@
+Collection.metaClass.orderedSort = { params ->
+    def column = params?.column ?: 0
+    def reverse = params?.reverse ?: false
+    def ordering = params?.ordering ?: {x, y -> x <=> y } as Comparator
+
+    table.sort(false) { x, y -> (reverse ? -1 : 1) * ordering.compare(x[column], y[column])}
+}