1 files changed, 57 insertions, 0 deletions
diff --git a/challenge-209/james-smith/perl/ch-2.pl b/challenge-209/james-smith/perl/ch-2.pl
new file mode 100644
index 0000000000..458f0b80ca
--- /dev/null
+++ b/challenge-209/james-smith/perl/ch-2.pl
@@ -0,0 +1,57 @@
+#!/usr/local/bin/perl
+
+use strict;
+use warnings;
+use feature qw(say);
+use Test::More;
+use Benchmark qw(cmpthese timethis);
+use Data::Dumper qw(Dumper);
+
+my @ACC = (
+ [ ['A', 'a1@a.com', 'a2@a.com'],
+   ['B', 'b1@b.com'],
+   ['A', 'a3@a.com', 'a1@a.com'] ],
+ [ ['A', 'a1@a.com', 'a2@a.com'],
+   ['B', 'b1@b.com'],
+   ['A', 'a3@a.com'],
+   ['B', 'b2@b.com', 'b1@b.com'] ],
+ [ ['A', 'a1@a.com', 'a2@a.com'],
+   ['A', 'a3@a.com', 'a4@a.com'],
+   ['A', 'a2@a.com', 'a4@a.com'] ],
+ [ ['A', 'a1@a.com', 'a2@a.com'],
+   ['A', 'a2@a.com', 'a3@a.com'],
+   ['A', 'a3@a.com', 'a4@a.com'],
+   ['A', 'a4@a.com', 'a5@a.com'],
+   ['A', 'a5@a.com', 'a6@a.com'] ],
+ [ ['A', 'a1@a.com', 'a2@a.com'],
+   ['A', 'a3@a.com', 'a4@a.com'],
+   ['A', 'a5@a.com', 'a6@a.com'],
+   ['A', 'a7@a.com', 'a8@a.com'],
+   ['A', 'a1@a.com', 'a3@a.com'],
+   ['A', 'a5@a.com', 'a7@a.com'],
+   ['A', 'a1@a.com', 'a5@a.com'] ],
+);
+
+say Dumper(merge_accounts( $_ )) for @ACC;
+
+sub merge_accounts {
+  my($in,$out,%seen,$t) = ([],shift);
+  while(@{$out}!=@{$in}) {
+    ($in,$out,%seen) = ($out,[]);
+    O: for my $acc (@{$in}) {
+      my( $name, @e )=@{ $acc };
+      for(@e) {
+        if( exists $seen{$_} ) {
+          my( $m, @f ) = @{ $out->[ $t = $seen{$_} ] };
+          my %T        = map { $_=>1 } @e, @f;
+          $seen{$_}    = $t for keys %T;
+          $out->[ $t ] = [ $m, keys %T ];
+          next O;
+        }
+      }
+      $seen{$_} = @{$out} for @e;
+      push @{$out},$acc;
+    }
+  }
+  $out
+}