Data commit

Task/Generic-swap/Pike/generic-swap.pike

@@ -0,0 +1,30 @@
+mixed first = 5;
+mixed second = "foo";
+array pair = ({ 5, "foo" });
+
+void swapvars(string a, string b)
+{
+    [this[a], this[b]] = ({ this[b], this[a] });
+}
+
+void swaparray(array swapit)
+{
+    [swapit[1], swapit[0]] = ({ swapit[0], swapit[1] });
+}
+
+void main()
+{
+    write("swap variables:\n");
+    write("%O, %O\n", first, second);
+    // we could just use [first, second] = ({ second, first });
+    swapvars("first", "second");
+    write("%O, %O\n", first, second);
+
+    write("swap array:\n");
+    write("%{ %O %}\n", pair);
+    // we could just use [pair[1], pair[0]] = ({ pair[0], pair[1] });
+    // directly, but since arrays are called by reference,
+    // it also works through a function
+    swaparray(pair);
+    write("%{%O %}\n", pair);
+}