From 315bbc80a049f04530698fd94f9baaa7e70a4f63 Mon Sep 17 00:00:00 2001
From: "Jaldhar H. Vyas" <jaldhar@braincells.com>
Date: Mon, 27 May 2019 02:09:48 -0400
Subject: Challenge 9 by Jaldhar H. Vyas

---
 challenge-009/jaldhar-h-vyas/perl5/ch-1.pl |  16 +++++
 challenge-009/jaldhar-h-vyas/perl5/ch-2.pl | 110 +++++++++++++++++++++++++++++
 challenge-009/jaldhar-h-vyas/perl6/ch-1.p6 |  15 ++++
 challenge-009/jaldhar-h-vyas/perl6/ch-2.p6 |  81 +++++++++++++++++++++
 4 files changed, 222 insertions(+)
 create mode 100755 challenge-009/jaldhar-h-vyas/perl5/ch-1.pl
 create mode 100755 challenge-009/jaldhar-h-vyas/perl5/ch-2.pl
 create mode 100755 challenge-009/jaldhar-h-vyas/perl6/ch-1.p6
 create mode 100755 challenge-009/jaldhar-h-vyas/perl6/ch-2.p6

diff --git a/challenge-009/jaldhar-h-vyas/perl5/ch-1.pl b/challenge-009/jaldhar-h-vyas/perl5/ch-1.pl
new file mode 100755
index 0000000000..0140ac3e32
--- /dev/null
+++ b/challenge-009/jaldhar-h-vyas/perl5/ch-1.pl
@@ -0,0 +1,16 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+use 5.010;
+
+my $n = 100; # first number with a 5-digit square
+while(1) {
+    my $nsquared = $n * $n;
+    my %digits;
+    map { $digits{$_} = 1; } (split //, $nsquared);
+    if (scalar keys %digits  == 5) { 
+        say "$nsquared ($n * $n)";
+        last;
+    }
+    $n++;
+};
diff --git a/challenge-009/jaldhar-h-vyas/perl5/ch-2.pl b/challenge-009/jaldhar-h-vyas/perl5/ch-2.pl
new file mode 100755
index 0000000000..5096c30444
--- /dev/null
+++ b/challenge-009/jaldhar-h-vyas/perl5/ch-2.pl
@@ -0,0 +1,110 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+use 5.010;
+use experimental 'smartmatch';
+no warnings 'experimental::smartmatch';
+
+sub usage {
+    print <<"-USAGE-";
+    Usage:
+    $0 -d <items>
+    $0 -m <items>
+    $0 -s <items>
+
+    -d          dense ranking
+    -m          modified ranking
+    -s          standard ranking
+    <numbers>   a list of items to rank
+-USAGE-
+    exit(1);
+}
+
+sub group {
+    my ($items) = @_;
+    my %groups;
+    my $rank = 1;
+    my $current = $items->[0];
+
+    for my $item (@{$items}) {
+        if ($item !~ $current) {
+            $rank++;
+            $current = $item;
+        }
+        push @{$groups{$rank}}, $item;
+    }
+
+    return \%groups;
+}
+
+sub denseRank {
+    my ($groups) = @_;
+
+    my @results;
+    for my $rank (sort keys %{$groups}) {
+        for my $item (@{$groups->{$rank}}) {
+            push @results, [ $rank, $item];
+        }
+    }
+
+    return \@results;
+}
+
+sub modifiedRank {
+    my ($groups) = @_;
+
+    my @results;
+    my $total = 0;
+    for my $rank (sort keys %{$groups}) {
+        $total += scalar @{$groups->{$rank}};
+        for my $item (@{$groups->{$rank}}) {
+            push @results, [ $total, $item ];
+        }
+    }
+
+    return \@results;
+}
+
+sub standardRank {
+    my ($groups) = @_;
+
+    my @results;
+    my $total = 1;
+    for my $rank (sort keys %{$groups}) {
+        for my $item (@{$groups->{$rank}}) {
+            push @results, [ $total, $item ];
+        }
+        $total += scalar @{$groups->{$rank}};
+    }
+
+    return \@results;
+}
+
+sub display {
+    my ($results) = @_;
+
+    for my $result (@{$results}) {
+        say "$result->[0] -> $result->[1]";
+    }
+}
+
+if (scalar @ARGV < 2) {
+   usage();
+}
+
+my $opt = shift @ARGV;
+my @items = sort @ARGV;
+
+if ($opt eq '-d') {
+    display(denseRank(group(\@items)));
+
+} elsif ($opt eq '-m') {
+    display(modifiedRank(group(\@items)));
+
+} elsif ($opt eq '-s') {
+    display(standardRank(group(\@items)));
+
+} else {
+   usage();
+}
+
diff --git a/challenge-009/jaldhar-h-vyas/perl6/ch-1.p6 b/challenge-009/jaldhar-h-vyas/perl6/ch-1.p6
new file mode 100755
index 0000000000..13f2cdff34
--- /dev/null
+++ b/challenge-009/jaldhar-h-vyas/perl6/ch-1.p6
@@ -0,0 +1,15 @@
+#!/usr/bin/perl6
+
+sub MAIN() {
+    my $n = 100; # first number with a 5-digit square
+    loop {
+        my $nsquared = $n * $n;
+        my %digits;
+        $nsquared.comb.map({ %digits{$_} = True; });
+        if (%digits.elems  == 5) { 
+            say "$nsquared ($n * $n)";
+            last;
+        }
+        $n++;
+    }
+}
diff --git a/challenge-009/jaldhar-h-vyas/perl6/ch-2.p6 b/challenge-009/jaldhar-h-vyas/perl6/ch-2.p6
new file mode 100755
index 0000000000..6284659f20
--- /dev/null
+++ b/challenge-009/jaldhar-h-vyas/perl6/ch-2.p6
@@ -0,0 +1,81 @@
+#!/usr/bin/perl6
+
+sub group(@items) {
+    my %groups;
+    my $rank = 1;
+    my $current = @items[0];
+
+    for @items -> $item {
+        if $item !~~ $current {
+            $rank++;
+            $current = $item;
+        }
+        %groups{$rank}.push($item);
+    }
+
+    return %groups;
+}
+
+sub denseRank(%groups) {
+    my @results;
+    for %groups.keys.sort -> $rank {
+        for %groups{$rank}.list -> $item {
+            @results.push(Pair.new($rank, $item));
+        }
+    }
+
+    return @results;
+}
+
+sub modifiedRank(%groups) {
+    my @results;
+    my $total = 0;
+    for %groups.keys.sort -> $rank {
+        $total += %groups{$rank}.elems;
+        for %groups{$rank}.list -> $item {
+            @results.push(Pair.new($total, $item ));
+        }
+    }
+
+    return @results;
+}
+
+sub standardRank(%groups) {
+    my @results;
+    my $total = 1;
+    for %groups.keys.sort -> $rank {
+        for %groups{$rank}.list -> $item {
+            @results.push(Pair.new($total, $item ));
+        }
+        $total += %groups{$rank}.elems;
+    }
+
+    return @results;
+}
+
+sub display(@results) {
+    for @results -> Pair $result {
+        say $result.key, ' -> ', $result.value;
+    }
+}
+
+multi sub MAIN (
+    *@items,            #= a list of items to rank
+    Bool :$d! where .so #= dense ranking
+) {
+    @items.sort ==> group() ==> denseRank() ==> display();
+}
+
+multi sub MAIN (
+    *@items,
+    Bool :$m! where .so #= modified ranking
+) {
+    @items.sort ==> group() ==> modifiedRank() ==> display();
+}
+
+multi sub MAIN (
+    *@items,
+    Bool :$s! where .so #= standard ranking
+) {
+    @items.sort ==> group() ==> standardRank() ==> display();
+}
-- 
cgit