matching patterns

[mario kulka]

I am trying to extract ".jpg" (subtype of the file) from the string:
c:\my_files\file.jpg

I found the following pattern on the net:
$file =~ s/.*[\/\\](.*)/$1/;
which extracts the file name (file.jpg). I understood most of that pattern except what does the (.*) part does? And how can I tweak it so I only get the "jpg" part.

thanks,
M



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