Week 32 solutions

2 files changed, 81 insertions, 0 deletions

diff --git a/challenge-032/ryan-thompson/perl5/ch-1.pl b/challenge-032/ryan-thompson/perl5/ch-1.pl
new file mode 100755
index 0000000000..3ec455ad1c
--- /dev/null
+++ b/challenge-032/ryan-thompson/perl5/ch-1.pl
@@ -0,0 +1,26 @@
+#!/usr/bin/env perl
+
+# Instance Count
+#
+# Ryan Thompson <rjt@cpan.org>
+
+use strict;
+use warnings;
+no  warnings 'uninitialized';
+use List::Util qw< max >;
+
+# -csv must be first argument, in case you need to process a file named '-csv'
+# Usually I'd use Getopt::Long, but this is even simpler.
+my $csv = $ARGV[0] eq '-csv' ? shift : 0;
+
+my %count; # string => count
+chomp, $count{$_}++ while <>;
+
+# Pretty output is better than a lower constant on your complexity. :-)
+my $key_width = max map { length }  keys  %count;
+my $val_width = max map { length } values %count;
+my $fmt = $csv ? "%s,%d\n" : "%-${key_width}s %${val_width}d\n";
+
+# Sort by result count, then alphabetically by keyword
+printf $fmt, $_, $count{$_}
+    for sort { $count{$a} <=> $count{$b} || $a cmp $b } keys %count;
diff --git a/challenge-032/ryan-thompson/perl5/ch-2.pl b/challenge-032/ryan-thompson/perl5/ch-2.pl
new file mode 100755
index 0000000000..1d90fe363c
--- /dev/null
+++ b/challenge-032/ryan-thompson/perl5/ch-2.pl
@@ -0,0 +1,55 @@
+#!/usr/bin/env perl
+
+# ASCII Bar Chart
+#
+# I've added the optional "sort by" option, and then I went and added
+# negative numbers and auto-scaling to a user-specified --width for fun.
+#
+# Ryan Thompson <rjt@cpan.org>
+
+use 5.010;
+use strict;
+use warnings;
+use List::Util qw/min max/;
+use Math::Round;
+
+my %data = ( foo => 10, bar => 20, foobar => 50 );
+
+print_bar_graph_simple(\%data);
+say '';
+print_bar_graph({ %data, neg => -25 }, { char => '=', width => 50 });
+
+# Simple version. Auto-sizes the labels, that's about it.
+sub print_bar_graph_simple {
+    my ($data) = @_;
+
+    my $len    = max map { length } keys %$data;
+    printf "%-${len}s | %s\n", $_, '#' x round($data->{$_})
+        for sort keys %$data;
+}
+
+# "Deluxe" version with scaling, custom bars, and negative number support
+# by_key: True = Sort by key, then value          [Default: value, then key ]
+#  width: Scale to total width, including labels  [Default: undef (no scale)]
+#   char: Character to use for bars in bar chart  [Default: #               ]
+sub print_bar_graph {
+    my ($data, $opts) = @_;
+
+    my $sort = $opts->{by_key}
+        ? sub {          $a cmp $b          || $data->{$a} <=> $data->{$b} }
+        : sub { $data->{$a} <=> $data->{$b} ||          $a cmp $b          };
+
+    # Housekeeping for number scaling and label sizing
+    my $len    = max map { length } keys %$data;
+    my $width  = $opts->{width} ? $opts->{width} - $len - 1 : 0;
+    my $max    = max $width, values %$data;
+    my $negmax = min   0,    values %$data;
+    my $scale  = $width ? $width / (abs($negmax) + 1 + $max) : 1;
+    my $negpad = round($scale * abs($negmax));
+
+    printf "%-${len}s %${negpad}s|%s\n", $_,
+        $data->{$_} < 0
+            ? (    $opts->{char} x round(abs($data->{$_}) * $scale), '')
+            : ('', $opts->{char} x round(    $data->{$_}  * $scale))
+                for sort $sort keys %$data;
+}