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2) { say int($arr1[$index]) + int($arr2[$index]); } --output:-- Argument "" isn't numeric in int at 2line 9. Name "main::a" used only once: possible typo at 2line 12. But I don't understand why the warning should arise in the first place, especially from the use of such a common module as List:: More Utils.

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Count Zero A program should be light and agile, its subroutines connected like a string of pearls.

The spirit and intent of the program should be retained throughout.

There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James 7stud: My perspective is this: perl knows how to translate numeric strings such as "14" into a number.

2) { say $arr1[$index] + $arr2[$index]; } --output:-- Argument "" isn't numeric in addition (+) at 2line 10.

1 Argument "" isn't numeric in addition (+) at 2line 10.

3 Argument "" isn't numeric in addition (+) at 2line 10.4 use strict; use warnings; use 5.010; my @arr1 = ("1", "", ""); my @arr2 = ("", "3", "4"); for my $index (0 .. 4 use strict; use warnings; use 5.010; use List:: More Utils qw{ pairwise }; my @arr1 = (10, 20, 30); my @arr2 = (1, 1, 1); my @totals = pairwise {$a + $b} @arr1, @arr2; --output:-- Name "main::b" used only once: possible typo at 2line 12. Wheeler is an expert in computer security and has long worked in improving development techniques for large and high-risk software systems.He is the author of the book "Secure Programming for Linux and Unix HOWTO" and is a validator for the Common Criteria.David also wrote the article "Why Open Source Software/Free Software? use strict; use warnings; use 5.010; my @arr1 = ("1", "", ""); my @arr2 = ("", "3", "4"); for my $index (0 ..

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