Add all the A tasks

Task/Apply-a-callback-to-an-array/Sather/apply-a-callback-to-an-array.sa

@@ -0,0 +1,12 @@
+class MAIN is
+  do_something(i:INT):INT is
+    return i * i;
+  end;
+
+  main is
+    a:ARRAY{INT} := |1, 2, 3, 4, 5|;
+    -- we use an anonymous closure to apply our do_something "callback"
+    a.map(bind(do_something(_)));
+    loop #OUT + a.elt! + "\n"; end;
+  end;
+end;