From 47fef88a03653dec3ac6e522ba2c0265436e19c8 Mon Sep 17 00:00:00 2001
From: Roger Bell_West <roger@firedrake.org>
Date: Mon, 1 Jun 2020 13:50:28 +0100
Subject: Solutions for challenge #63.

---
 challenge-063/roger-bell-west/perl/ch-1.pl | 30 ++++++++++++++++++++++++++++++
 challenge-063/roger-bell-west/perl/ch-2.pl | 24 ++++++++++++++++++++++++
 challenge-063/roger-bell-west/raku/ch-1.p6 | 26 ++++++++++++++++++++++++++
 challenge-063/roger-bell-west/raku/ch-2.p6 | 20 ++++++++++++++++++++
 4 files changed, 100 insertions(+)
 create mode 100755 challenge-063/roger-bell-west/perl/ch-1.pl
 create mode 100755 challenge-063/roger-bell-west/perl/ch-2.pl
 create mode 100755 challenge-063/roger-bell-west/raku/ch-1.p6
 create mode 100755 challenge-063/roger-bell-west/raku/ch-2.p6

diff --git a/challenge-063/roger-bell-west/perl/ch-1.pl b/challenge-063/roger-bell-west/perl/ch-1.pl
new file mode 100755
index 0000000000..210eb81cc2
--- /dev/null
+++ b/challenge-063/roger-bell-west/perl/ch-1.pl
@@ -0,0 +1,30 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+
+if (last_word('  hello world',                qr/[ea]l/) ne 'hello') {
+  die 1;
+}
+if (last_word("Don't match too much, Chet!",  qr/ch.t/i) ne  'Chet!') {
+  die 2;
+}
+if (defined(last_word("spaces in regexp won't match", qr/in re/))){
+  die 3;
+}
+if (last_word( join(' ', 1..1e6),             qr/^(3.*?){3}/) ne '399933') {
+  die 4;
+}
+
+sub last_word {
+  my ($str,$re)=@_;
+  my @list=reverse grep /\S/,split /\s+/,$str;
+  my $r;
+  foreach (@list) {
+    if ($_ =~ $re) {
+      $r=$_;
+      last;
+    }
+  }
+  return $r;
+}
diff --git a/challenge-063/roger-bell-west/perl/ch-2.pl b/challenge-063/roger-bell-west/perl/ch-2.pl
new file mode 100755
index 0000000000..e246d02093
--- /dev/null
+++ b/challenge-063/roger-bell-west/perl/ch-2.pl
@@ -0,0 +1,24 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+
+if (rotate('xyxx') != 7) {
+  die "wrong answer";
+}
+
+sub rotate {
+  my $str=shift;
+  my @s=split '',$str;
+  my $k=scalar @s;
+  my $n=0;
+  while (1) {
+    $n++;
+    my @l=splice @s,0,($n % $k);
+    push @s,@l;
+    if (join('',@s) eq $str) {
+      last;
+    }
+  }
+  return $n;
+}
diff --git a/challenge-063/roger-bell-west/raku/ch-1.p6 b/challenge-063/roger-bell-west/raku/ch-1.p6
new file mode 100755
index 0000000000..730e39bbaa
--- /dev/null
+++ b/challenge-063/roger-bell-west/raku/ch-1.p6
@@ -0,0 +1,26 @@
+#! /usr/bin/perl6
+
+if (last_word('  hello world',                rx/<[ea]>l/) ne 'hello') {
+  die 1;
+}
+if (last_word("Don't match too much, Chet!",  rx/:i ch.t/) ne  'Chet!') {
+  die 2;
+}
+if (defined(last_word("spaces in regexp won't match", rx/:s in re/))) {
+  die 3;
+}
+if (last_word(join(' ', 1..1e6),             rx/^(3.*?) ** 3/) ne '399933') {
+  die 4;
+}
+
+sub last_word ($str,$re) {
+  my @list=reverse grep /\S/,split /\s+/,$str;
+  my $r;
+  for @list {
+    if ($_ ~~ $re) {
+      $r=$_;
+      last;
+    }
+  }
+  return $r;
+}
diff --git a/challenge-063/roger-bell-west/raku/ch-2.p6 b/challenge-063/roger-bell-west/raku/ch-2.p6
new file mode 100755
index 0000000000..ae673e74db
--- /dev/null
+++ b/challenge-063/roger-bell-west/raku/ch-2.p6
@@ -0,0 +1,20 @@
+#! /usr/bin/perl6
+
+if (rotate('xyxx') != 7) {
+  die "wrong answer";
+}
+
+sub rotate ($str) {
+  my @s=$str.comb(/./);
+  my $k=@s.elems;
+  my $n=0;
+  while (1) {
+    $n++;
+    my @l=splice @s,0,($n % $k);
+    map {push @s,$_},@l.flat;
+    if (join('',@s) eq $str) {
+      last;
+    }
+  }
+  return $n;
+}
-- 
cgit