random: add container random choice

random.hpp

@@ -155,4 +155,19 @@ namespace cruft::random {
         std::uniform_int_distribution<size_t> dist (0, N - 1);
         return t[dist (generator ())];
     }
+
+
+    //-------------------------------------------------------------------------
+    template <typename ContainerT>
+    auto
+    choose (ContainerT &data)
+    {
+        if (data.empty ())
+            return data.end ();
+
+        return std::next (
+            data.begin (),
+            uniform (typename ContainerT::size_type {0}, data.size () - 1)
+        );
+    }
 };