Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number

Re: CGI -Perl problem

by thatguy (Parson)
on Dec 17, 2002 at 18:08 UTC ( #220600=note: print w/ replies, xml ) Need Help??

in reply to Validating ISBN numbers?

It depends on what your requirements for validation are. If you only want a ten digit number,

my $data_in="ISBN 90-70002-34-5"; $data_in=~ s/^ISBN//; $data_in=~ s/ /-/g; $data_in=~ s/-//g; my @isbn=split('', $data_in); my $count=scalar @isbn; unless (($count eq 10) && (!($count=~ m/[a-z]/i))){ warn "not enough digits in ISBN: $count instead of 10\n"; }
Now, if you are checking against a database to validate, it depends on the format of the ISBN that is stored. If it's space or hyphen delimited you can:
# data from the database you are checking against my $data_in="90 70002 34 5"; # inputed data my $check_data="ISBN 90-70002-34-5"; $check_data=~ s/^ISBN//; $check_data=~ s/-/ /g; $check_data=~ s/^ //; unless (($data_in eq $check_data) && (!($count=~ m/[a-z]/i))){{ die "failure: data in does not match db record\n"; }
Of course it all depends on how you want to validate. If you have access to a database of ISBNs and you can validate GroupID, Publisher prefix, and so on then validate against it. Other wise, the best you can hope for is that it's just 10 digits.


Ahh the power of PerlMonks.. I stopped to grab some animal cookies and suddenly there are seven replies

Comment on Re: CGI -Perl problem
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://220600]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others romping around the Monastery: (9)
As of 2015-12-01 03:47 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (792 votes), past polls