Hello,
I wanted to know if there is any way by using regular expression to count the occurrences of a repeating pattern in a line ?
here is the problem statement
Given a log file:
some garbage...from:123.54,78.21...more garbage..to:56,82,124.54...more some more garbage...from:11.54,45.84...garbage..to:115.87,98.65 ... Assumption: these coordinates will always appear in sequence: from ... to... from ... to... But these from - to pair may or may not be on same line
Write a script to return pairs of (from, to) coordinates.
The only way I could think of was by splitting the line....But I feel there should be a better way. here is my code below 
#!/usr/bin/perl
use Data::Dumper;

open(FH,"<abc.txt")or die EXPR;
     
while (<FH>) {
    
   my @words = split(/ /,$_);
   
   foreach (@words) {
    
    if ($_=~/from:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/) {
       
        print "$1- \n";
      
    }elsif ($_ =~/to:(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/){
       
       print "$1 \n";
       
       
   }
   
   
   }
}

close (FH);

[download]
This is the sample input file abc.txt 
hshhhgljlkjglgkjj from:198.18.66.5 aegighighighilg to:198.18.66.6 iiuf
+duifuiuih from:198.18.66.7
hiihhj to:198.18.66.8 hhouhoho from:198.18.66.9 igilgojhjh to:198.18.6
+6.10 igighliho
from:198.18.66.11 highighioouhouhhhoh  to:198.18.66.12

[download]
And the output I am expecting is 

198.18.66.5 ,198.18.66.6
198.18.66.7 ,198.18.66.8
198.18.66.9 ,198.18.66.10
198.18.66.11 ,198.18.66.12

[download]

In reply to To find and count a repeating pattern in a line by punitpawar

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