how to know if folder contents have changed

[davisn90210 at gmail.com]

On Nov 11, 11:03 pm, "dev... at gmail.com" <dev... at gmail.com> wrote:
> hi
> i am trying to create a cache of  digitized values of  around 100
> image files in a folder..In my program i would like to know from time
> to time if a new image has been added or removed from the folder..
>

Why not use the file creation/modification timestamps?