Merge pull request #2947 from jacoby/master

Ch90

3 files changed, 61 insertions, 0 deletions

diff --git a/challenge-090/dave-jacoby/blog.txt b/challenge-090/dave-jacoby/blog.txt
new file mode 100644
index 0000000000..b692db20a0
--- /dev/null
+++ b/challenge-090/dave-jacoby/blog.txt
@@ -0,0 +1 @@
+https://jacoby.github.io/2020/12/08/multiplication-and-dna-perl-weekly-challenge-90.html
\ No newline at end of file
diff --git a/challenge-090/dave-jacoby/perl/ch-1.pl b/challenge-090/dave-jacoby/perl/ch-1.pl
new file mode 100644
index 0000000000..ed5f5e8cc6
--- /dev/null
+++ b/challenge-090/dave-jacoby/perl/ch-1.pl
@@ -0,0 +1,22 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature qw{ say signatures state };
+no warnings qw{ experimental };
+
+my $sequence =  'GTAAACCCCTTTTCATTTAGACAGATCGACTCCTTATCCATTCTCAGAGATGTGTTGCTGGTCGCCG' ;
+my $complement = $sequence;
+$complement =~ tr/TACG/ATGC/;
+
+say <<"END";
+    Sequence:   $sequence
+    Complement: $complement
+END
+
+for my $i ( qw( A T C G ) ) {
+    my $n = scalar grep {/$i/} split // , $sequence;
+    say qq(    $i: $n );
+}
+
+
diff --git a/challenge-090/dave-jacoby/perl/ch-2.pl b/challenge-090/dave-jacoby/perl/ch-2.pl
new file mode 100644
index 0000000000..2973f52f1d
--- /dev/null
+++ b/challenge-090/dave-jacoby/perl/ch-2.pl
@@ -0,0 +1,38 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use feature qw{ say signatures state };
+no warnings qw{ experimental };
+
+use Scalar::Util qw{looks_like_number};
+
+my ( $m, $n ) = map { abs $_ } grep { looks_like_number $_ } @ARGV;
+
+$m //= 17;
+$n //= 38;
+
+say <<"END";
+
+    m $m
+    n $n
+END
+
+say egyptian( $m, $n );
+say $m * $n;
+
+exit;
+
+sub egyptian ( $m, $n ) {
+    my $o = 0;
+    my $i = 1;
+    do {
+        my $e = $m % 2 != 0 ? 1 : 0;
+        say join "\t", $o, $e, $i, $m, $n;
+        $o += $n if $e;
+        $i *= 2;
+        $m = int $m / 2;
+        $n = $n * 2;
+    } while ( $m > 0 );
+    return $o;
+}