Hi Lee, some comments on your code:
On Wed, 12 Jun 2013 11:28:34 +0200 lee <l...@yun.yagibdah.de> wrote: > David Christensen <dpchr...@holgerdanske.com> writes: > > > On 06/11/13 21:44, lee wrote: > >> ... what I don't understand is what > >> the most efficient way would be to create a sha-2 sum for a file. > > > > Have you considered Digest? > > > > http://perldoc.perl.org/Digest.html > > Yes, I've been looking at descriptions like that and I don't know perl > well enough to understand them. I wanted to learn perl for ages and > never got around to it. Now I'm finding it extremely useful, and I'm > learning it the wrong way by not starting at the beginning ... > > I've come up with this for a test: > > > #!/bin/perl Is your Perl at /bin? Shouldn't it be in /usr/bin? > > use strict; > use warnings; > > use Digest::SHA You're missing a ";" at the end. > > our $fh; Why the our? > > $ctx = Digest->new(SHA-256 => $arg); $ctx and $arg were not declared so «strict» will complain. > > open $fh, "testfile"; 1. You shouldn't pre-declare $fh . 2. You should use «use autodie;». > $ctx->addfile( $fh); You can also add a filename using "->addfile ()" > > print "hash: " . $ctx->b64digest . "\n"; > This code won't compile. Perhaps learn Perl properly using some of the resources here: * http://perl-begin.org/ (my own link). * http://perl-tutorial.org/ * http://perl-begin.org/tutorials/bad-elements/ (also my link). Regards, Shlomi Fish > > ... and that says: > > > ,---- > | "" is not exported by the Digest::SHA module > | Can't continue after import errors at sha.pl line 8. > | BEGIN failed--compilation aborted at sha.pl line 8. > `---- > > > As you can see, I don't don't know what I'm doing here. > "$ctx = Digest->new(SHA-256 => $arg);" is probably not right, but I > don't know what I'm supposed to put for $arg. The error message doesn't > make any sense to me, either, line 8 is "our $fh;". > > This is why I was looking for an example so I can see how these things > are being used. > > -- ----------------------------------------------------------------- Shlomi Fish http://www.shlomifish.org/ "The Human Hacking Field Guide" - http://shlom.in/hhfg Q: I’ll be about 6.5 milliard Terran years next September. — http://www.shlomifish.org/humour/Star-Trek/We-the-Living-Dead/ Please reply to list if it's a mailing list post - http://shlom.in/reply . -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
