Perl 5 solution for Challenge 28, Task 2.

2 files changed, 70 insertions, 0 deletions

diff --git a/challenge-028/julien-fiegehenn/perl5/ch-2.pl b/challenge-028/julien-fiegehenn/perl5/ch-2.pl
new file mode 100644
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+++ b/challenge-028/julien-fiegehenn/perl5/ch-2.pl
@@ -0,0 +1,67 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use Time::Piece;
+use Term::ANSIScreen qw(cls locate);
+use Term::ReadKey 'GetTerminalSize';
+use feature 'say';
+
+# Write a script to display Digital Clock.
+# Feel free to be as creative as you can when displaying digits.
+# We expect bare minimum something like “14:10:11”.
+
+my %alphabet = (
+    1   => ["    11", "    11", "    11", "    11", "    11"], # This matrix holds the digits of our
+    2   => ["222222", "    22", "222222", "22    ", "222222"], # digital clock. Each digit contains
+    3   => ["333333", "    33", "333333", "    33", "333333"], # five sets of strings, which will be
+    4   => ["44  44", "44  44", "444444", "    44", "    44"], # transposed into rows further down in
+    5   => ["555555", "55    ", "555555", "    55", "555555"], # the code. They look confusing here
+    6   => ["666666", "    66", "666666", "66  66", "666666"], # because the code is indented to be
+    7   => ["777777", "    77", "    77", "    77", "    77"], # more compact. See below the __END__
+    8   => ["888888", "88  88", "888888", "88  88", "888888"], # section for a more readable example
+    9   => ["999999", "99  99", "999999", "    99", "999999"], # of what this looked like before I
+    0   => ["000000", "00  00", "00  00", "00  00", "000000"], # ran perltidy on it.
+    ':' => ["      ", "  ::  ", "      ", "  ::  ", "      "],
+);
+
+# This is our main loop. Note while () is equivalent to while (1).
+while () {
+
+    # clear the screen after every frame
+    cls();
+
+    # Grab the screen size and half it so we can start from (roughly) the middle.
+    # Doing that in the loop means we can handle resizing of the terminal during run time.
+    my ($x, $y) = map { int $_ / 2 } GetTerminalSize();
+
+    my @letters = split //, localtime->hms;
+
+    # Each row is represented by a column above in the hash with our alphabet.
+    foreach my $row (0 .. 4) {
+
+        # Our "digits" are 6 characters wide and there are 8 of them, plus 1 space after
+        # all but the last. That gives us 62 characters in total, so we move half of that
+        # to the left from the centre of the screen to start writing.
+
+        # The "digits" are 5 characters high, so we start off at 2 characters above the
+        # middle of the screen.
+        locate($y + ($row - 2), $x - 31);
+        say map { $alphabet{$_}->[$row] . q{ } } @letters;
+    }
+
+    # I wonder how long this needs to run until it gets out of sync...
+    sleep 1;
+}
+
+__END__
+"    11",
+"    11",
+"    11",
+"    11",
+"    11"
+
+"222222",
+"    22",
+"222222",
+"22    ",
+"222222"
\ No newline at end of file
diff --git a/challenge-028/julien-fiegehenn/perl5/cpanfile b/challenge-028/julien-fiegehenn/perl5/cpanfile
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--- /dev/null
+++ b/challenge-028/julien-fiegehenn/perl5/cpanfile
@@ -0,0 +1,3 @@
+requires 'Term::ANSIScreen';
+requires 'Term::ReadKey';
+requires 'Time::Piece';