5 files changed, 139 insertions, 0 deletions
diff --git a/challenge-318/arne-sommer/blog.txt b/challenge-318/arne-sommer/blog.txt
new file mode 100644
index 0000000000..d257b5b107
--- /dev/null
+++ b/challenge-318/arne-sommer/blog.txt
@@ -0,0 +1 @@
+https://raku-musings.com/reverse-position.html
diff --git a/challenge-318/arne-sommer/raku/ch-1.raku b/challenge-318/arne-sommer/raku/ch-1.raku
new file mode 100755
index 0000000000..26ea01e535
--- /dev/null
+++ b/challenge-318/arne-sommer/raku/ch-1.raku
@@ -0,0 +1,30 @@
+#! /usr/bin/env raku
+
+unit sub MAIN ($str where $str ~~ /^ <[a..z]>+ $/,
+               :v(:$verbose));
+
+sub grouped ($str, :$verbose)
+{
+  my @parts = gather
+  {
+    my $curr;
+    my $count = 0;
+    
+    for $str.comb -> $char
+    {
+      if $count && $curr ne $char
+      {
+        take $curr x $count;
+	$count = 0;
+      }
+      $curr = $char;
+      $count++;
+    }
+    take $curr x $count;
+  } 
+
+  say ": Grouped '$str' as { @parts.raku }" if $verbose;
+  return @parts;
+}
+
+say grouped($str, :$verbose).grep(*.chars > 2).map('"' ~ * ~ '"').join(", ") || '""';
diff --git a/challenge-318/arne-sommer/raku/ch-2.raku b/challenge-318/arne-sommer/raku/ch-2.raku
new file mode 100755
index 0000000000..2a7194284e
--- /dev/null
+++ b/challenge-318/arne-sommer/raku/ch-2.raku
@@ -0,0 +1,39 @@
+#! /usr/bin/env raku
+
+subset NUMWORD where * ~~ /^<[0..9 \s]>+$/;
+
+unit sub MAIN (NUMWORD $source,
+               NUMWORD $target,
+               :v(:$verbose));
+
+my @source = $source.words;
+my @target = $target.words;
+
+die "Not the same elements" unless @source.sort eqv @target.sort;
+
+if @source eqv @target
+{
+  say 'true';
+  exit;
+}
+
+my $end = @target.end;
+
+for ^$end -> $i
+{
+  for $i + 1 .. $end -> $j
+  {
+    my @copy = @source.clone;
+    @copy[$i .. $j] = @copy[$i .. $j].reverse;
+
+    say ": ({ @source.join(",") }) Reverse $i..$j -> ({ @copy.join(",") })" if $verbose;
+
+    if @copy eqv @target
+    {
+      say 'true';
+      exit;
+    }
+  }
+}
+
+say 'false';
+\ No newline at end of file
diff --git a/challenge-318/arne-sommer/raku/group-position b/challenge-318/arne-sommer/raku/group-position
new file mode 100755
index 0000000000..26ea01e535
--- /dev/null
+++ b/challenge-318/arne-sommer/raku/group-position
@@ -0,0 +1,30 @@
+#! /usr/bin/env raku
+
+unit sub MAIN ($str where $str ~~ /^ <[a..z]>+ $/,
+               :v(:$verbose));
+
+sub grouped ($str, :$verbose)
+{
+  my @parts = gather
+  {
+    my $curr;
+    my $count = 0;
+    
+    for $str.comb -> $char
+    {
+      if $count && $curr ne $char
+      {
+        take $curr x $count;
+	$count = 0;
+      }
+      $curr = $char;
+      $count++;
+    }
+    take $curr x $count;
+  } 
+
+  say ": Grouped '$str' as { @parts.raku }" if $verbose;
+  return @parts;
+}
+
+say grouped($str, :$verbose).grep(*.chars > 2).map('"' ~ * ~ '"').join(", ") || '""';
diff --git a/challenge-318/arne-sommer/raku/reverse-equals b/challenge-318/arne-sommer/raku/reverse-equals
new file mode 100755
index 0000000000..2a7194284e
--- /dev/null
+++ b/challenge-318/arne-sommer/raku/reverse-equals
@@ -0,0 +1,39 @@
+#! /usr/bin/env raku
+
+subset NUMWORD where * ~~ /^<[0..9 \s]>+$/;
+
+unit sub MAIN (NUMWORD $source,
+               NUMWORD $target,
+               :v(:$verbose));
+
+my @source = $source.words;
+my @target = $target.words;
+
+die "Not the same elements" unless @source.sort eqv @target.sort;
+
+if @source eqv @target
+{
+  say 'true';
+  exit;
+}
+
+my $end = @target.end;
+
+for ^$end -> $i
+{
+  for $i + 1 .. $end -> $j
+  {
+    my @copy = @source.clone;
+    @copy[$i .. $j] = @copy[$i .. $j].reverse;
+
+    say ": ({ @source.join(",") }) Reverse $i..$j -> ({ @copy.join(",") })" if $verbose;
+
+    if @copy eqv @target
+    {
+      say 'true';
+      exit;
+    }
+  }
+}
+
+say 'false';
+\ No newline at end of file