Indeed, in the original question it doesn't specify that the filename should be stored - just seemed to me that if you were storing the file modification times you might want to know which file they referred to :)

BTW, thanks for the pointer on the

$filedata{...}

got my $ and % mixed up there for a mo.

But today you took me walking, Through a land that we have lost,
While our children sit at websites, With no access to the cost