Isn't the behavior of "my" with an "if" modifier unspecified? I think 
my ($x, $y, $z) = ($line =~ /($num) ($num) ($num)\s*$/);

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would do what you want here. If it doesn't match all three variables will be undefined.

In reply to Re^3: substr in nested foreach loop by Anonymous Monk
in thread substr in nested foreach loop by sarani

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