From 1e03babb4aed4ab8f5535a89b776a9bdf69eae2d Mon Sep 17 00:00:00 2001
From: arnesom <arne@bbop.org>
Date: Fri, 24 Mar 2023 22:06:56 +0100
Subject: Arne Sommer

---
 challenge-209/arne-sommer/blog.txt                 |  1 +
 challenge-209/arne-sommer/raku/ch-1.raku           | 28 ++++++++++
 challenge-209/arne-sommer/raku/ch-2.raku           | 59 ++++++++++++++++++++++
 challenge-209/arne-sommer/raku/merge-account       | 59 ++++++++++++++++++++++
 .../arne-sommer/raku/special-bit-characters        | 28 ++++++++++
 5 files changed, 175 insertions(+)
 create mode 100644 challenge-209/arne-sommer/blog.txt
 create mode 100755 challenge-209/arne-sommer/raku/ch-1.raku
 create mode 100755 challenge-209/arne-sommer/raku/ch-2.raku
 create mode 100755 challenge-209/arne-sommer/raku/merge-account
 create mode 100755 challenge-209/arne-sommer/raku/special-bit-characters

diff --git a/challenge-209/arne-sommer/blog.txt b/challenge-209/arne-sommer/blog.txt
new file mode 100644
index 0000000000..cd28336b87
--- /dev/null
+++ b/challenge-209/arne-sommer/blog.txt
@@ -0,0 +1 @@
+https://raku-musings.com/special-account.html
diff --git a/challenge-209/arne-sommer/raku/ch-1.raku b/challenge-209/arne-sommer/raku/ch-1.raku
new file mode 100755
index 0000000000..1c21288e73
--- /dev/null
+++ b/challenge-209/arne-sommer/raku/ch-1.raku
@@ -0,0 +1,28 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@bits where @bits.elems > 0 && all(@bits) eq any(0,1) && @bits[*-1] == 0, :v($verbose));
+
+my $string = "";
+
+while (@bits.elems)
+{
+  my $first = @bits.shift;
+
+  if $first == 0
+  {
+    $string ~= 'a';
+  }
+  elsif (@bits.elems)
+  {
+    my $second = @bits.shift;
+    $string ~= $second == 0 ?? 'b' !! 'c';
+  }
+  else
+  {
+    $string ~= "ERROR";
+  }
+}
+
+say ":String: $string" if $verbose;
+
+say + $string.ends-with('a');
diff --git a/challenge-209/arne-sommer/raku/ch-2.raku b/challenge-209/arne-sommer/raku/ch-2.raku
new file mode 100755
index 0000000000..c37a8428f0
--- /dev/null
+++ b/challenge-209/arne-sommer/raku/ch-2.raku
@@ -0,0 +1,59 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (:v($verbose));
+
+my @accounts1 = [ ["A", "a1@a.com", "a2@a.com"],
+                  ["B", "b1@b.com"],
+                  ["A", "a3@a.com", "a1@a.com"]
+                ];
+
+say "Example 1:";
+merge-accounts(@accounts1);
+
+my @accounts2 = [ ["A", "a1@a.com", "a2@a.com"],
+                  ["B", "b1@b.com"],
+                  ["A", "a3@a.com"],
+                  ["B", "b2@b.com", "b1@b.com"]
+                ];
+
+say "\nExample2:";
+merge-accounts(@accounts2);
+
+sub merge-accounts (@accounts)
+{
+  my %accounts;
+
+ACC:
+  for @accounts -> @account
+  {
+    my $key = @account.shift;
+    my @email = @account;
+
+    if %accounts{$key}
+    {
+      for @(%accounts{$key}) -> @emails
+      {
+        if any(@emails) eq any(@email)
+        {
+	  say ":Append $key emails: @email[] (to @emails[])" if $verbose;
+          @emails.append: @email;
+          next ACC;
+        }
+      }
+    }
+
+    say ":Add $key emails: @email[]" if $verbose;
+
+    %accounts{$key}.push: @email;
+  }
+
+  say "[";
+  for sort keys %accounts -> $key
+  {
+    for @(%accounts{$key}) -> @emails
+    {
+      say "  [\"$key\", ", join(", ", @emails.unique.map({ "\"$_\""}) ), "],";
+    }
+  }
+  say "]";
+}
diff --git a/challenge-209/arne-sommer/raku/merge-account b/challenge-209/arne-sommer/raku/merge-account
new file mode 100755
index 0000000000..c37a8428f0
--- /dev/null
+++ b/challenge-209/arne-sommer/raku/merge-account
@@ -0,0 +1,59 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (:v($verbose));
+
+my @accounts1 = [ ["A", "a1@a.com", "a2@a.com"],
+                  ["B", "b1@b.com"],
+                  ["A", "a3@a.com", "a1@a.com"]
+                ];
+
+say "Example 1:";
+merge-accounts(@accounts1);
+
+my @accounts2 = [ ["A", "a1@a.com", "a2@a.com"],
+                  ["B", "b1@b.com"],
+                  ["A", "a3@a.com"],
+                  ["B", "b2@b.com", "b1@b.com"]
+                ];
+
+say "\nExample2:";
+merge-accounts(@accounts2);
+
+sub merge-accounts (@accounts)
+{
+  my %accounts;
+
+ACC:
+  for @accounts -> @account
+  {
+    my $key = @account.shift;
+    my @email = @account;
+
+    if %accounts{$key}
+    {
+      for @(%accounts{$key}) -> @emails
+      {
+        if any(@emails) eq any(@email)
+        {
+	  say ":Append $key emails: @email[] (to @emails[])" if $verbose;
+          @emails.append: @email;
+          next ACC;
+        }
+      }
+    }
+
+    say ":Add $key emails: @email[]" if $verbose;
+
+    %accounts{$key}.push: @email;
+  }
+
+  say "[";
+  for sort keys %accounts -> $key
+  {
+    for @(%accounts{$key}) -> @emails
+    {
+      say "  [\"$key\", ", join(", ", @emails.unique.map({ "\"$_\""}) ), "],";
+    }
+  }
+  say "]";
+}
diff --git a/challenge-209/arne-sommer/raku/special-bit-characters b/challenge-209/arne-sommer/raku/special-bit-characters
new file mode 100755
index 0000000000..1c21288e73
--- /dev/null
+++ b/challenge-209/arne-sommer/raku/special-bit-characters
@@ -0,0 +1,28 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@bits where @bits.elems > 0 && all(@bits) eq any(0,1) && @bits[*-1] == 0, :v($verbose));
+
+my $string = "";
+
+while (@bits.elems)
+{
+  my $first = @bits.shift;
+
+  if $first == 0
+  {
+    $string ~= 'a';
+  }
+  elsif (@bits.elems)
+  {
+    my $second = @bits.shift;
+    $string ~= $second == 0 ?? 'b' !! 'c';
+  }
+  else
+  {
+    $string ~= "ERROR";
+  }
+}
+
+say ":String: $string" if $verbose;
+
+say + $string.ends-with('a');
-- 
cgit