diff options
| -rw-r--r-- | challenge-139/james-smith/perl/ch-2.pl | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/challenge-139/james-smith/perl/ch-2.pl b/challenge-139/james-smith/perl/ch-2.pl index 8eea2a8664..663dab1aa6 100644 --- a/challenge-139/james-smith/perl/ch-2.pl +++ b/challenge-139/james-smith/perl/ch-2.pl @@ -7,7 +7,7 @@ use feature qw(say); my( $N, @primes, @long_primes ) = ( $ARGV[0]||5, 2 ); O: for( my $p=3; @long_primes<$N; $p+=2 ) { - ($p % $_) || (next O) for @primes; ## next if !prime + ($p % $_) || (next O) for @primes; push @long_primes, $p if $p - rec_len($p) == 1; push @primes, $p; } @@ -17,6 +17,5 @@ say $_ for @long_primes; sub rec_len { my( $D, $N, $s ) = ( shift, 1, '' ); ($s,$N) = ( $s.int($N/$D), ($N%$D).0 ) for 0 .. 2*$D; - $s =~ m{(\d+?)\1+$}; - length $1; + $s =~ /(\d+?)\1+$/ ? length $1 : 0; } |