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regex needed to find all files with no extension

 
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i'm trying to locate all the files on my harddrive (windows) that have no file extension. i need a regex that will find all filenames with no "." in the name. anyone know how to do this?
thanks,
Jon
 
Jon Dornback
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it's not as good as grep, but i found a solution in dos:
dir *. /A:-d /S
lists all files with no extension, not including directory listings, and recurses subdirectories.
 
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