Re^3: How do i replace one variable with another after searching for a pattern

[AppleFritter]

Even easier. Same as above, but the regex simplifies to:

    s/<([0-9A-F]+)>/hex($1)/eg;

[Niklaus Mikaelson]

stummala@sa-mua01:/home/stummala/scripts$./samp2
Can't locate feature.pm in @INC (@INC contains: /home/gsapan/perl5/lib
+/perl5/sun4-solaris-thread-multi /home/gsapan/perl5/lib/perl5/x86_64-
+linux-thread-multi /home/gsapan/perl5/lib/perl5 /usr/lib64/perl5/site
+_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 
+/usr/lib/perl5/site_perl/5.8.5 /usr/lib/perl5/site_perl /usr/lib64/pe
+rl5/vendor_perl/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/vendor
+_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib64/perl5/5.8.8/x86_64-
+linux-thread-multi /usr/lib/perl5/5.8.8 .) at ./samp2 line 4.
BEGIN failed--compilation aborted at ./samp2 line 4.

[AppleFritter]

Ah, you're using an ancient perl. Simply leave out the use feature qw/say/; line, and replace say; in the loop body with a print statement:

while(<DATA>) {
    chomp;
    s/<([0-9A-F]+)>/hex($1)/eg;
    print "$_\n";
}

Actually, you could probably also get away with not chomping your input in the first place here:

while(<DATA>) {
    s/<([0-9A-F]+)>/hex($1)/eg;
    print;
}

And at this point, assuming you merely want to output the results and do nothing further with them in this particular script, the whole script can be turned into a oneliner you can directly enter on the command line. Using perl's -p switch (see perlrun):

$ perl -pe 's/<([0-9A-F]+)>/hex($1)/eg' /home/stummala/a
JDW-HP 1MVWV93V7j2Hxsa0Ag6 24:00:00 SUBJECT_EXACT _Did you160serve our
+160country? -New VA Home.Loan Program_
JDW-HP 1MVWV98Ddd4fLsa0Ag6 24:00:00 SUBJECT_EXACT Did.you.serve_our co
+untry? New-VA Home160Loan Program_
$