Data commit

Task/Optional-parameters/E/optional-parameters.e

@@ -0,0 +1,22 @@
+def defaultOrdering(a, b) { return a.op__cmp(b) }
+
+def sort {
+
+    to run(table) {
+        return sort(table, 0, false, defaultOrdering)
+    }
+    to run(table, column) {
+        return sort(table, column, false, defaultOrdering)
+    }
+    to run(table, column, reverse) {
+        return sort(table, column, reverse, defaultOrdering)
+    }
+
+    to run(table :List[List[String]], column :int, reverse :boolean, ordering) {
+        return table.sort(fn a, b {
+            def ord := ordering(a[column], b[column])
+            if (reverse) { -ord } else { ord }
+        })
+    }
+
+}