Hello monks,

I have some texts that looks like this:

<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="green" height="10"></td>
<td bgcolor="green" height="10"></td>
<td bgcolor="green" height="10"></td>
<td bgcolor="green" height="10"></td>
<td bgcolor="green" height="10"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="green" height="10"></td>
<td bgcolor="green" height="10"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
<td bgcolor="white"></td>
[download]

I need to count the number of "green" lines. In the above example, my output should look something like:

First green = line 6 to 10
Second green = line 15 to 17
[download]

Previously I've written a code that counts the occurrence of "green" if it occurs only once. My code is a bit silly, and I can't really explain it without being wordy, so I'll just put it here.

#!/usr/bin/perl

use warnings;

open (GREEN,"data.txt");
open (WHITE,"data.txt");     
$/ = "</td>";

$counter_white = 0;
$counter_green = 0;

#----------------count number of green---------------------
while ($line_green = <GREEN>) 
{
    if ($line_green =~ /<td bgcolor="green" height="10"><\/td>/){$coun
+ter_green++;}
}


#------count number of white (before any green occur)-------------
while ($line_white = <WHITE>) 
{
    if ($line_white =~ /<td bgcolor="white"><\/td>/){$counter_white++;
+}

    if ($line_white =~ /<td bgcolor="green" height="10"><\/td>/){last;
+}     # escape when green starts
}

#---------------------------------------

print "white = ".$counter_white."\n";
print "green = ".$counter_green."\n";

$beginning = $counter_white + 1;
$end = $counter_white + $counter_green;

print $beginning."\n";    # start of green
print $end."\n";    # end of green

print "The result starts from ".$beginning." to ".$end."\n";

close (GREEN);
close (WHITE);
[download]

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