[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

How to inc or dec a string like "j000012.html"

Posted on 2003-11-19
14
Medium Priority
?
276 Views
Last Modified: 2013-12-25
I have a simple question, I want to inc or dec string, for example, "j000012.html" to "j000011.html" or "j000013.html".
0
Comment
Question by:mikezang
[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
  • 7
  • 6
14 Comments
 
LVL 48

Expert Comment

by:Tintin
ID: 9783766
Depends what language you are talking about.  What's your preference?


0
 
LVL 5

Author Comment

by:mikezang
ID: 9783837
Sorry, that is Perl.
0
 
LVL 84

Expert Comment

by:ozo
ID: 9785133
$string = "j000012.html";
substr($string,1,6)++;
0
Hire Technology Freelancers with Gigs

Work with freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely, and get projects done right.

 
LVL 84

Expert Comment

by:ozo
ID: 9785143
$string =~ s/(\d+)/my $i=$1;++$i/e;
0
 
LVL 84

Accepted Solution

by:
ozo earned 200 total points
ID: 9785186
Decrement is a little trickier
(what would "j000000.html"  be when decremented?)

string = "j000012.html";
for( substr$string,1,6 ){
     tr/0-9/9876543210;
    $_++;
    tr/0-9/9876543210/;
}
0
 
LVL 5

Author Comment

by:mikezang
ID: 9785204
Thanks a lot!
0
 
LVL 5

Author Comment

by:mikezang
ID: 9786822
Hi
Itried $string =~ s/(\d+)/my $i=$1;++$i/e;
it's ok, but when I tried $string =~ s/(\d+)/my $i=$1;--$i/e;
I only got "j11.html", not "j000011.html", can you help me again?
0
 
LVL 5

Author Comment

by:mikezang
ID: 9788110
Then if $string = "gs19/j000012.html", it also doesn't qork.
Can you help me?
0
 
LVL 84

Expert Comment

by:ozo
ID: 9791965
As I said, decrement is a little trickyer.
You could try something like

$string =~ s/(\d+)(\.html)/my $i=$1;$i=~tr!0-9!9876543210!;++$i;$i=~tr!9876543210!0-9!;$i.$2/e;

or did you want to decrement both the 19 and the 000012?
0
 
LVL 5

Author Comment

by:mikezang
ID: 9792164
No, I only want to inc or dec filename, not directory.
0
 
LVL 84

Expert Comment

by:ozo
ID: 9792380
what identifies the part you want to inc or dec?
0
 
LVL 5

Author Comment

by:mikezang
ID: 9795004
$file = "gs19/j000003.html" or "qjs/j00003.html" or "....../xxx0003.html"

I hope
$prev = "gs19/j000002.html" or "qjs/j00002.html" or "....../xxx0002.html"
$next = "gs19/j000004.html" or "qjs/j00004.html" or "....../xxx0004.html"

0
 
LVL 84

Expert Comment

by:ozo
ID: 9795107
If it's always 6 digits .html then
($next = $file) =~ s/(\d{6})(\.html)/sprintf"%06d$2",$1+1/ie;
($prev = $file) =~ s/(\d{6})(\.html)/sprintf"%06d$2",$1-1/ie;
0
 
LVL 5

Author Comment

by:mikezang
ID: 9795536
Thanks a lot!
0

Featured Post

Enroll in October's Free Course of the Month

Do you work with and analyze data? Enroll in October's Course of the Month for 7+ hours of SQL training, allowing you to quickly and efficiently store or retrieve data. It's free for Premium Members, Team Accounts, and Qualified Experts!

Question has a verified solution.

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

This tutorial will discuss fancy secure registration forms, with AJAX technology support. In this article I assume you already know HTML and some JS. I will write the code using WhizBase Server Pages, so you need to know some basics in WBSP (you mig…
A quick Powershell script I wrote to find old program installations and check versions of a specific file across the network.
Learn the basics of if, else, and elif statements in Python 2.7. Use "if" statements to test a specified condition.: The structure of an if statement is as follows: (CODE) Use "else" statements to allow the execution of an alternative, if the …
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …
Suggested Courses

649 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