Solved

creating a hash

Posted on 2000-03-25
1
169 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
1 Comment
 
LVL 19

Accepted Solution

by:
Kim Ryan earned 50 total points
Comment Utility
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

What Security Threats Are You Missing?

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

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…
A year or so back I was asked to have a play with MongoDB; within half an hour I had downloaded (http://www.mongodb.org/downloads),  installed and started the daemon, and had a console window open. After an hour or two of playing at the command …
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…
This tutorial demonstrates a quick way of adding group price to multiple Magento products.

771 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

10 Experts available now in Live!

Get 1:1 Help Now