$ss = '1234567890'; $lname = 'Gilden'; # $pkey = substr($ss,length($ss)-4,length($ss)) . substr($lname,0,3);
Why not just:
$pkey = substr($ss, -4) . substr($lname,0,3);
$ss = '09876543';
$lname = 'Smith';
# this line is bad! -- trying to have the same functionality as the substr line.
$pkey = ($ss =~ m/\d{length($ss)-4}($ss{length($ss)})/);
# $pkey = ($pkey =~ m/$lname{0,3}/;)
This might be one way:
$pkey = join '', $ss =~ /(\d{4})$/, $lname =~ /(.{3})/;# Is there any advantage using =~ m/(\w){3}/ over substr method?
No. Regular expressions are less efficient. substr() should better be used in this case.
-- Gunnar Hjalmarsson Email: http://www.gunnar.cc/cgi-bin/contact.pl
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