Dear Perlmonks,

I have written a perl code which is giving wrong results. I need your help to sort out this problem.

From an array, I am interested in getting the substrings starting with either A or G, followed by TG, followed by any number of characters, followed by T, followed by A or G, ending with A or G i.e. AGTG.*TAGAG

#!/usr/bin/perl -w
# Finding substring starting with [AG]TG followed by any number of cha
+racter but ending with T[AG][AG].
# Getting the output of each substring, its length and locating its po
+sition from left to right 
# by number with starting position as zero
@d = “CCATGNNNTAACCNNATGNNTAGCC”;
use 1.010; 
my $string ="@d";
# Remove whitespace 
$string=~ s/\s//g;
 $x= () =$string=~ /[AG]TG.*T[AG][AG]/ig; 
say $_ for map{("%d('%S')",length,$_)}split/$x/,$string; 
my @a=$_ for map{("%d('%S')",length,$_)}split/$x/,$string; 
print "The sequences and their lengths are:\n  @a \n";   
exit;

[download]

Result: I am getting the following wrong result from cmd:

Microsoft Windows Version 6.1.7600

Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\DR-SUPRIYO>cd desktop

C:\Users\DR-SUPRIYO\Desktop>perl2.pl

Can't call method "say" without a package or object reference at C:\Users\DR-SUP RIYO\Desktop\perl2.pl line 11.

Correct Result should be like this:

The sequences , their lengths and positions are:

ATGNNNTAA; 9; 2-10

<ATGNNTAG; 8; 15-22

I hope perl monks will help me get the correct result.

In reply to Request to correct the perl code for getting substrings by supriyoch_2008

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.