Hi Perlmonks,

I am interested to get all the possible matches from a string using regex. But I have got fewer matches than expected with the perl script g1.pl. I have given the script, the incorrect results and the expected results below. I request perlmonks to provide suggestions how to write the regex to get the correct results.

Here goes the script:

#!/usr/bin/perl  
use warnings; 
   
  $seq="TT TATAAT CGCG ATG CAG GAG TGG TAA TGA TAG CC TGA TATAAT CCC A
+TG CTA 
CAT TGA TT"; 

 $seq=~ s/\s//gs;   

while ($seq=~ /([AG]TG).*?(TAA|TAG|TGA)+?/gs) {
           
    my $match=$&; 
     $match=~ s/\s//g; push  @matches,$match;}  

print"\n Matches are:\n\n"; 
print join ("\n",@matches);
print"\n\n";  
exit;
[download]

I have got the incorrect results like:

C:\Users\Dr Supriyo>cd desktop

C:\Users\Dr Supriyo\Desktop>g1.pl

 Matches are:

ATGCAGGAGTGGTAA
ATGCTACATTGA
[download]

The correct results should be:

Matches are:

ATGCAGGAGTGGTAA
ATGCAGGAGTGGTAATGA
ATGCAGGAGTGGTAATGATAG
ATGCAGGAGTGGTAATGATAGCCTGA
ATGCTACATTGA
[download]

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