Nice, but don't forget the first rule of a capturing m// - test for success before using $1... 

while (<DATA>) {
    next unless m/(\d+)\D+(\d+)/;  # or warn && next, or die
    $min = $1 if $1 < $min;
    $max = $2 if $2 > $max;
}

[download]

Also, rather than imposing an artificial limit on min (and max), what about addind a definedness check? 

    $min = $1 if ( ! defined( $min ) || ( $1 < $min ) );
    $max = $2 if ( ! defined( $max ) || ( $1 > $max ) );

[download]

I'll grant that the since this doesn't handle negative numbers (yet) anyway, max is likely fine the way it is.

In reply to Re^2: extract numbers from unformatted text strings by fishbot_v2
in thread extract numbers from unformatted text strings by punch_card_don

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