Solved

Converting letters to numbers

Posted on 2003-10-30
8
457 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 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
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
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
 
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

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

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…
In the distant past (last year) I hacked together a little toy that would allow a couple of Manager types to query, preview, and extract data from a number of MongoDB instances, to their tool of choice: Excel (http://dilbert.com/strips/comic/2007-08…
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…
Six Sigma Control Plans

690 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