From d6e42509e43e61d6d4080f4f154c79e6009e81c5 Mon Sep 17 00:00:00 2001
From: Packy Anderson <packy@cpan.org>
Date: Tue, 25 Jul 2023 00:57:27 -0400
Subject: Challenge 227 solutions in Perl by Packy Anderson

---
 challenge-227/packy-anderson/README           | 27 +++++++++
 challenge-227/packy-anderson/perl/task-1.pl   | 36 ++++++++++++
 challenge-227/packy-anderson/perl/task-2.pl   | 79 +++++++++++++++++++++++++++
 challenge-227/packy-anderson/task-2-input.txt |  9 +++
 4 files changed, 151 insertions(+)
 create mode 100755 challenge-227/packy-anderson/perl/task-1.pl
 create mode 100755 challenge-227/packy-anderson/perl/task-2.pl
 create mode 100644 challenge-227/packy-anderson/task-2-input.txt

diff --git a/challenge-227/packy-anderson/README b/challenge-227/packy-anderson/README
index e0f3edaf1e..7c199c42a4 100644
--- a/challenge-227/packy-anderson/README
+++ b/challenge-227/packy-anderson/README
@@ -3,8 +3,35 @@
 ## Perl
 
 * [Task 1](perl/task-1.pl)
+
+Sample output
+```
+$ perl/task-1.pl 2023
+Input: $year = 2023
+Output: 2
+```
 * [Task 2](perl/task-2.pl)
 
+Sample output
+```
+$ perl/task-2.pl < task-2-input.txt
+IV + V => IX
+M - I => CMXCIX
+X / II => V
+XI * VI => LXVI
+VII ** III => CCCXLIII
+V - V => nulla (they knew about zero but didn't have a symbol)
+V / II => non potest (they didn't do fractions)
+MMM + M => non potest (they only went up to 3999)
+V - X => non potest (they didn't do negative numbers)
+$ echo "MMMM" | perl/task-2.pl
+Lines must be of the form "operand1 operator operand2"
+where both operands are valid roman numerals and the
+operator is one of the following:  +  -  *  /  **
+$ echo "X + Y" | perl/task-2.pl
+'Y' is not a roman numberal!
+```
+
 ## Raku
 
 * [Task 1](raku/task-1.raku)
diff --git a/challenge-227/packy-anderson/perl/task-1.pl b/challenge-227/packy-anderson/perl/task-1.pl
new file mode 100755
index 0000000000..1bfd2a1d13
--- /dev/null
+++ b/challenge-227/packy-anderson/perl/task-1.pl
@@ -0,0 +1,36 @@
+#!/usr/bin/env perl
+use v5.38;
+
+# let's use the core modules for date manipulation
+use Time::Piece;
+use Time::Seconds qw( ONE_DAY );
+
+# get the year from the command line
+my $year = shift @ARGV
+  or die "usage: $0 year\n";
+
+# do bounds checking as specified in the problem
+if ($year < 1753 || $year > 9999) {
+  die "Only years between 1753 to 9999 are allowed ($year is out of range)\n";
+}
+
+# create an object for Jan 01 of the given year
+my $t = Time::Piece->strptime("$year-01-01", "%Y-%m-%d")
+                   ->truncate(to => 'day');
+
+# find the first friday
+# in Time::Piece->wday, 1 = Sunday, 6 = Friday
+while ( $t->wday != 6) {
+  $t += ONE_DAY; # add 1 day
+}
+
+# now keep adding 7 days to the date until the year changes,
+# noting how many times the day of the month is 13
+my $thirteen_count = 0;
+while ( $t->year == $year ) {
+  $thirteen_count++ if $t->mday == 13;
+  $t += ONE_DAY * 7;
+}
+
+say "Input: \$year = $year";
+say "Output: $thirteen_count";
\ No newline at end of file
diff --git a/challenge-227/packy-anderson/perl/task-2.pl b/challenge-227/packy-anderson/perl/task-2.pl
new file mode 100755
index 0000000000..425a4341ea
--- /dev/null
+++ b/challenge-227/packy-anderson/perl/task-2.pl
@@ -0,0 +1,79 @@
+#!/usr/bin/env perl
+use v5.38;
+
+use Roman; # there's a module for handling Roman Numerals!
+
+sub do_arithmetic {
+  my $line = shift;
+  # split the inout line into the three parts:
+  # the two operands and the infix operator
+  my($operand1r, $operator, $operand2r) = split /\s+/, $line;
+  unless (defined $operand1r &&
+          defined $operator  &&
+          defined $operand2r) {
+    say q{Lines must be of the form "operand1 operator operand2"};
+    say q{where both operands are valid roman numerals and the};
+    say q{operator is one of the following:  +  -  *  /  **};
+    return;
+  }
+
+  my($operand1a, $operand2a);
+
+  # check that the first operand is a roman numeral
+  if (isroman($operand1r)) {
+    # it is a roman numeral, convert it
+    $operand1a = arabic($operand1r);
+  }
+  else {
+    say "'$operand1r' is not a roman numberal!";
+    return;
+  }
+
+  # check that the second operand is a roman numeral
+  if (isroman($operand2r)) {
+    # it is a roman numeral, convert it
+    $operand2a = arabic($operand2r);
+  }
+  else {
+    say "'$operand2r' is not a roman numberal!";
+    return;
+  }
+
+  # calculate the results
+  my $result;
+  if ($operator eq '+')     { $result = $operand1a + $operand2a; }
+  elsif ($operator eq '-')  { $result = $operand1a - $operand2a; }
+  elsif ($operator eq '*')  { $result = $operand1a * $operand2a; }
+  elsif ($operator eq '/')  { $result = $operand1a / $operand2a; }
+  elsif ($operator eq '**') { $result = $operand1a ** $operand2a; }
+  else {
+    die "Unknown operator '$operator'; valid operators are + - * / **\n";
+  }
+
+  # handle all the special output cases
+  if ($result == 0) {
+    say "$operand1r $operator $operand2r => nulla "
+      . "(they knew about zero but didn't have a symbol)";
+  }
+  elsif (int($result) != $result) {
+    say "$operand1r $operator $operand2r => non potest "
+      . "(they didn't do fractions)";
+  }
+  elsif ($result > 3999) {
+    say "$operand1r $operator $operand2r => non potest "
+      . "(they only went up to 3999)";
+  }
+  elsif ($result < 0) {
+    say "$operand1r $operator $operand2r => non potest "
+      . "(they didn't do negative numbers)";
+  }
+  else {
+    say "$operand1r $operator $operand2r => " . uc roman($result);
+  }
+}
+
+# while we have input on STDIN, process the calculations
+while (my $line = <>) {
+  chomp $line;
+  do_arithmetic($line);
+}
\ No newline at end of file
diff --git a/challenge-227/packy-anderson/task-2-input.txt b/challenge-227/packy-anderson/task-2-input.txt
new file mode 100644
index 0000000000..e6e81dde7d
--- /dev/null
+++ b/challenge-227/packy-anderson/task-2-input.txt
@@ -0,0 +1,9 @@
+IV + V
+M - I
+X / II
+XI * VI
+VII ** III
+V - V
+V / II
+MMM + M
+V - X
-- 
cgit 


From c66fd873250d3c271ac4ae7649491ca7bf087b41 Mon Sep 17 00:00:00 2001
From: Packy Anderson <packy@cpan.org>
Date: Tue, 25 Jul 2023 05:24:55 -0400
Subject: Challenge 227 solutions in Raku by Packy Anderson

---
 challenge-227/packy-anderson/README           |  26 +++++++
 challenge-227/packy-anderson/raku/task-1.raku |  29 +++++++
 challenge-227/packy-anderson/raku/task-2.raku | 106 ++++++++++++++++++++++++++
 3 files changed, 161 insertions(+)
 create mode 100755 challenge-227/packy-anderson/raku/task-1.raku
 create mode 100755 challenge-227/packy-anderson/raku/task-2.raku

diff --git a/challenge-227/packy-anderson/README b/challenge-227/packy-anderson/README
index 7c199c42a4..411d458e93 100644
--- a/challenge-227/packy-anderson/README
+++ b/challenge-227/packy-anderson/README
@@ -35,4 +35,30 @@ $ echo "X + Y" | perl/task-2.pl
 ## Raku
 
 * [Task 1](raku/task-1.raku)
+
+Sample output
+```
+$ raku/task-1.raku 2023
+Input: $year = 2023
+Output: 2
+```
+
 * [Task 2](raku/task-2.raku)
+
+Sample output
+```
+$ raku/task-2.raku < task-2-input.txt
+IV + V => IX
+M - I => CMXCIX
+X / II => V
+XI * VI => LXVI
+VII ** III => CCCXLIII
+V - V => nulla (they knew about zero but didn't have a symbol)
+V / II => non potest (they didn't do fractions)
+MMM + M => non potest (they only went up to 3999)
+V - X => non potest (they didn't do negative numbers)
+```
+
+## Extra
+
+[task-2-input.txt](task-2-input.txt)
\ No newline at end of file
diff --git a/challenge-227/packy-anderson/raku/task-1.raku b/challenge-227/packy-anderson/raku/task-1.raku
new file mode 100755
index 0000000000..d9fef52c0d
--- /dev/null
+++ b/challenge-227/packy-anderson/raku/task-1.raku
@@ -0,0 +1,29 @@
+#!/usr/bin/env raku
+
+sub MAIN($year) {
+  # do bounds checking as specified in the problem
+  if ($year < 1753 || $year > 9999) {
+    say "Only years between 1753 to 9999 are allowed ($year is out of range)";
+    exit 1;
+  }
+
+  # create an object for Jan 01 of the given year
+  my $t = Date.new($year, 1, 1);
+
+  # find the first friday
+  # in Date.day-of-week, 0 = Sunday, 5 = Friday
+  while ( $t.day-of-week != 5) {
+    $t++; # add 1 day
+  }
+
+  # now keep adding 7 days to the date until the year changes,
+  # noting how many times the day of the month is 13
+  my $thirteen_count = 0;
+  while ( $t.year == $year ) {
+    $thirteen_count++ if $t.day == 13;
+    $t += 7;
+  }
+
+  say "Input: \$year = $year";
+  say "Output: $thirteen_count";
+}
\ No newline at end of file
diff --git a/challenge-227/packy-anderson/raku/task-2.raku b/challenge-227/packy-anderson/raku/task-2.raku
new file mode 100755
index 0000000000..252340956f
--- /dev/null
+++ b/challenge-227/packy-anderson/raku/task-2.raku
@@ -0,0 +1,106 @@
+#!/usr/bin/env raku
+use Math::Roman; # it's v0.0.1, but usable
+
+sub isroman ( $var ) {
+  # Math::Roman doesn't have a test to see if a string is
+  # a Roman numeral, but it does throw an exception if it
+  # cannot convert it
+  my $result;
+  try {
+    CATCH {
+      default {
+        return False;
+      }
+    }
+    $result = Math::Roman.new: $var;
+  }
+  # Math::Roman also doesn't respect the maximum of 3999
+  if ($result.as-arabic > 3999) {
+    return False;
+  }
+
+  return True;
+}
+
+sub do_arithmetic (Str $line) {
+  # split the inout line into the three parts:
+  # the two operands and the infix operator
+  my ($operand1, $operator, $operand2) = $line.split(/\s+/);
+
+  unless (defined $operand1 &&
+          defined $operator  &&
+          defined $operand2) {
+    say q{Lines must be of the form "operand1 operator operand2"};
+    say q{where both operands are valid roman numerals and the};
+    say q{operator is one of the following:  +  -  *  /  **};
+    return;
+  }
+
+  # check that the first operand is a roman numeral
+  if (isroman($operand1)) {
+    # it is a roman numeral, convert it
+    $operand1 = Math::Roman.new: $operand1;
+  }
+  else {
+    say "'$operand1' is not a roman numberal!";
+    return;
+  }
+
+  # check that the second operand is a roman numeral
+  if (isroman($operand2)) {
+    # it is a roman numeral, convert it
+    $operand2 = Math::Roman.new: $operand2;
+  }
+  else {
+    say "'$operand2' is not a roman numberal!";
+    return;
+  }
+
+  # # calculate the results
+  my $result;
+  if ($operator eq '+')     {
+    $result = $operand1.as-arabic + $operand2.as-arabic;
+  }
+  elsif ($operator eq '-')  {
+    $result = $operand1.as-arabic - $operand2.as-arabic;
+  }
+  elsif ($operator eq '*')  {
+    $result = $operand1.as-arabic * $operand2.as-arabic;
+  }
+  elsif ($operator eq '/')  {
+    $result = $operand1.as-arabic / $operand2.as-arabic;
+  }
+  elsif ($operator eq '**') {
+    $result = $operand1.as-arabic ** $operand2.as-arabic;
+  }
+  else {
+    die "Unknown operator '$operator'; valid operators are + - * / **\n";
+  }
+
+  # handle all the special output cases
+  if ($result == 0) {
+    say "$operand1 $operator $operand2 => nulla "
+      ~ "(they knew about zero but didn't have a symbol)";
+  }
+  elsif ($result.truncate != $result) {
+    say "$operand1 $operator $operand2 => non potest "
+      ~ "(they didn't do fractions)";
+  }
+  elsif ($result > 3999) {
+    say "$operand1 $operator $operand2 => non potest "
+      ~ "(they only went up to 3999)";
+  }
+  elsif ($result < 0) {
+    say "$operand1 $operator $operand2 => non potest "
+      ~ "(they didn't do negative numbers)";
+  }
+  else {
+    $result = Math::Roman.new: value => $result.Int;
+    say "$operand1 $operator $operand2 => $result";
+  }
+}
+
+# while we have input on STDIN, process the calculations
+for $*IN.lines -> $line {
+  do_arithmetic($line);
+}
\ No newline at end of file
-- 
cgit 


From ab5a2fbe099db9164d6f77170e775ab8183602bc Mon Sep 17 00:00:00 2001
From: Packy Anderson <packy@cpan.org>
Date: Wed, 26 Jul 2023 18:32:14 -0400
Subject: Blog about last week's challenge

---
 challenge-226/packy-anderson/README | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/challenge-226/packy-anderson/README b/challenge-226/packy-anderson/README
index e0f3edaf1e..50e31830b9 100644
--- a/challenge-226/packy-anderson/README
+++ b/challenge-226/packy-anderson/README
@@ -9,3 +9,6 @@
 
 * [Task 1](raku/task-1.raku)
 * [Task 2](raku/task-2.raku)
+
+## Blog Post
+* [Perl Weekly Challenge 226](http://packy.dardan.com/2023/07/26/perl-weekly-challenge-226/)
\ No newline at end of file
-- 
cgit 


From a0e6853dbbd46409862ca090f096f9253a8e0a13 Mon Sep 17 00:00:00 2001
From: Packy Anderson <packy@cpan.org>
Date: Thu, 27 Jul 2023 01:41:52 -0400
Subject: Blog about this week's challenge

---
 challenge-227/packy-anderson/README | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/challenge-227/packy-anderson/README b/challenge-227/packy-anderson/README
index 411d458e93..1b230ba294 100644
--- a/challenge-227/packy-anderson/README
+++ b/challenge-227/packy-anderson/README
@@ -59,6 +59,10 @@ MMM + M => non potest (they only went up to 3999)
 V - X => non potest (they didn't do negative numbers)
 ```
 
-## Extra
+## Data File
 
-[task-2-input.txt](task-2-input.txt)
\ No newline at end of file
+[task-2-input.txt](task-2-input.txt)
+
+## Blog Post
+
+[Perl Weekly Challenge 227](http://packy.dardan.com/2023/07/27/perl-weekly-challenge-227/)
\ No newline at end of file
-- 
cgit