Widget Existence (Mastering Perl/Tk)

13.6. Widget Existence

To determine if a widget has been created and not destroyed, use Exists($widget):

if (Exists($widget)) {
   ...
}

Note the uppercase E on this method. The Exists method is different from the built-in Perl exists function. Make sure you don't confuse the two.


13.5. The Application's Name		13.7. Is the Widget Mapped?