Solved

Converting letters to numbers

Posted on 2003-10-30
8
427 Views
Last Modified: 2010-03-04
This is probably quite simple, but say I wanted to convert A-Z to 10-36.

Can I do this any way other than $string =~ s/A/10/i; , etc. ?

Thanks,
Nik
0
Comment
Question by:OKSD
  • 4
  • 4
8 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 9654142
$string=~s/([A-Z])/10+ord($1)-ord('A')/eg;
0
 
LVL 1

Author Comment

by:OKSD
ID: 9654215
Ok, I'll try that, thanks. Could you explain a bit of that? I understand some of it, but what is +ord and -ord? and what is the 'e' appended at the end?
0
 
LVL 1

Author Comment

by:OKSD
ID: 9654235
And how would you effect the opposite? i.e., numerical to text.

Thanks
0
 
LVL 84

Expert Comment

by:ozo
ID: 9654253
perldoc -f ord
       ord EXPR
       ord     Returns the numeric (the native 8-bit encoding,
               like ASCII or EBCDIC, or Unicode) value of the
               first character of EXPR.  If EXPR is omitted, uses
               $_.

               For the reverse, see "chr".  See perlunicode and
               encoding for more about Unicode.

perldoc perlop
       s/PATTERN/REPLACEMENT/egimosx
 
           Options are:

                   e   Evaluate the right side as an expression.
                   g   Replace globally, i.e., all occurrences.
                   i   Do case-insensitive pattern matching.
                   m   Treat string as multiple lines.
                   o   Compile pattern only once.
                   s   Treat string as single line.
                   x   Use extended regular expressions.
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 84

Expert Comment

by:ozo
ID: 9654300
s/(\d\d)/chr($1-10+ord('A'))/eg;
0
 
LVL 1

Author Comment

by:OKSD
ID: 9654311
Could you print an example of the reverse please?

Thanks
0
 
LVL 84

Accepted Solution

by:
ozo earned 150 total points
ID: 9654356
$_ = join' ','A'..'Z',"\n";
s/([A-Z])/ord($1)-ord('A')+10/eg;
print;
s/(\d\d)/chr($1+ord('A')-10)/eg;
print;
0
 
LVL 1

Author Comment

by:OKSD
ID: 9654363
Ok, works perfectly. Thank you very much! ;)

-Nik
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
Email validation in proper way is  very important validation required in any web pages. This code is self explainable except that Regular Expression which I used for pattern matching. I originally published as a thread on my website : http://www…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

919 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now