There is no cleaner easy way. In general, the cleanest solution
is to change your perl program to deal with case sensitive
file systems correctly, and just generally program
portably. See also
perlport.
Note that a -f does not test for
file a exsitence alone -- it also checks if it's
a "regular" file (not a directory, device, pipe, etc.)
(If you want to test for file exsitence, alone, that would
be -e.)
Also, note that your regex does not match the way you think
it does.
- it will match parts of a string. So
a file called "test1" will be said to exsit by it if
a file called "test10" exsits,
- metacharacters are
not escaped, so "." will not mean the "." character itself
but any character (except newline) when matching filenames.
You could fix these problems with using a regex, but
your are probably better off using either
lc or
uc and
eq, e.g.:
my($exsits) = grep { lc($file) eq lc($_) } readdir DIR
