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Re: TIMTOWTDI Challenge: Create a filename

by xdg (Monsignor)
on Jan 09, 2009 at 05:13 UTC ( [id://735081] : note . print w/replies, xml ) Need Help??

in reply to TIMTOWTDI Challenge: Create a filename

Assuming a quick-and-dirty temporary filename is desired:

my $filename = int rand 2**31;

Or pick a large random number of your choice. Plus if you need to generate the *same* temporary filenames on successive runs, you can set the seed for rand() ahead of time.

Similar in nature, but random alphanumerics, not unlike what File::Temp does internally:

my @chars = ('a' .. 'z', 'A' .. 'Z'); my $filename = join("", map { $chars[int rand(0+@chars)] } 0 .. 7);


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Re^2: TIMTOWTDI Challenge: Create a filename
by pobocks (Chaplain) on Jan 11, 2009 at 07:18 UTC

    To fully exploit the marvelous utility of the unix file system naming conventions, how about this?

    my $max_num = 255; my @chars = ('a' .. 'z', 'A' .. 'Z',0 .. 9, '_'); my $filename = join("", map { $chars[int rand(0+@chars)] } 1 .. $max_n +um);

    I don't have the energy right now, but a further helpful revision would be filling in all of the characters Unix allows in filenames. Oh, wait. That would be all of them except null. The mind boggles ;-)

    for(split(" ","tsuJ rehtonA lreP rekcaH")){print reverse . " "}print "\b.\n";