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

x
?
Solved

creating a hash

Posted on 2000-03-25
1
Medium Priority
?
180 Views
Last Modified: 2010-03-05
I have a file containing IP addresses. I want to read a file, and make a hash with IPs being the keys and the number of times that IP appears in the file as the value. So a file like this:


0.0.0.0
1.2.3.4
0.0.0.0
4.5.6.7
0.0.0.0
1.2.3.4

would create a hash like this:

%ips = (

0.0.0.0 => 1,
1.2.3.4 => 2,
4.5.6.7 => 3,

);

What I really need this for is counting IP accesses in a log file. I'll parse the log file, and:

1. if the IP is not already in the hash, add a key/value pair of <IP>=>"1".

2. if the IP is already in the hash, increment the value.

(how is this done?)

-Mike K.
0
Comment
Question by:lunaboy
[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
1 Comment
 
LVL 19

Accepted Solution

by:
Kim Ryan earned 200 total points
ID: 2657502
open(FH,"<ip_access.txt");
while (<FH>)
{
   chomp($_);
   $current_ip = $_;
   # increment occurence count, stored as value
   $ips{$current_ip}++;
}
close(FH);

foreach $ip (sort keys %ips)
{
   print("$ip was hit $ips{$ip} times\n");
}
0

Featured Post

Independent Software Vendors: 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

On Microsoft Windows, if  when you click or type the name of a .pl file, you get an error "is not recognized as an internal or external command, operable program or batch file", then this means you do not have the .pl file extension associated with …
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…
Six Sigma Control Plans

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