Merge pull request #2527 from jacoby/master

Challenge 82 - does it do CRLF right?

3 files changed, 56 insertions, 0 deletions

diff --git a/challenge-082/dave-jacoby/blog.txt b/challenge-082/dave-jacoby/blog.txt
new file mode 100644
index 0000000000..e434f71c11
--- /dev/null
+++ b/challenge-082/dave-jacoby/blog.txt
@@ -0,0 +1 @@
+https://jacoby.github.io/2020/10/14/perl-challenge-82.html
\ No newline at end of file
diff --git a/challenge-082/dave-jacoby/perl/ch-1.pl b/challenge-082/dave-jacoby/perl/ch-1.pl
new file mode 100644
index 0000000000..5d00a2b121
--- /dev/null
+++ b/challenge-082/dave-jacoby/perl/ch-1.pl
@@ -0,0 +1,23 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature qw{ say signatures state };
+no warnings qw{ experimental };
+
+use List::Util qw{ min max };
+
+push @ARGV, 12, 18 unless scalar @ARGV;
+
+common_factors( min(@ARGV), max(@ARGV) );
+
+sub common_factors ( $min, $max ) {
+    my @factors;
+    say qq{MIN: $min};
+    say qq{MAX: $max};
+
+    for my $i ( 1 .. $min ) {
+        push @factors, $i if $min % $i == 0 && $max % $i == 0;
+    }
+    say join ',', @factors;
+}
diff --git a/challenge-082/dave-jacoby/perl/ch-2.pl b/challenge-082/dave-jacoby/perl/ch-2.pl
new file mode 100644
index 0000000000..5f7273fd68
--- /dev/null
+++ b/challenge-082/dave-jacoby/perl/ch-2.pl
@@ -0,0 +1,32 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature qw{ say signatures state };
+no warnings qw{ experimental };
+
+my ( $aa, $bb, $cc ) = @ARGV;
+
+$aa //= "XY";
+$bb //= "X";
+$cc //= "XXY";
+
+say check_interleave( $aa, $bb, $cc );
+
+sub check_interleave ( $aa, $bb, $cc ) {
+    my $afirst;
+    my $bfirst;
+
+    while ( $aa ne "" || $bb ne "" ) {
+        my $la = substr $aa, 0, 1;
+        my $lb = substr $bb, 0, 1;
+        $afirst .= $la . $lb;
+        $bfirst .= $lb . $la;
+        substr( $aa, 0, 1 ) = '';
+        substr( $bb, 0, 1 ) = '';
+    }
+    return 1 if $cc eq $afirst;
+    return 1 if $cc eq $bfirst;
+    return 0;
+}
+