Create ch-2.pl

1 files changed, 30 insertions, 0 deletions

diff --git a/challenge-215/james-smith/perl/ch-2.pl b/challenge-215/james-smith/perl/ch-2.pl
new file mode 100644
index 0000000000..f01950dbd8
--- /dev/null
+++ b/challenge-215/james-smith/perl/ch-2.pl
@@ -0,0 +1,30 @@
+#!/usr/local/bin/perl
+
+use strict;
+use warnings;
+use feature qw(say);
+use Test::More;
+
+my @TESTS = (
+ [ [ 1, [1,0,0,0,1] ], 1 ],
+ [ [ 2, [1,0,0,0,1] ], 0 ],
+ [ [ 3, [1,0,0,0,0,0,0,0,1] ], 1 ],
+ [ [ 3, [1,0,0,0,0,0,0,0] ], 1],
+);
+
+sub insert_zero {
+  my($s,$c) = (0,shift);
+  $_ ? ( $c-= $s>2 && int( ($s-1)/2 ), $s=0 ) : $s++ for @_,1;
+  $c>0?0:1;
+}
+
+sub insert_zero_simultaneous {
+  my($s,$c) = (0,shift);
+  $_ ? ( $c-= $s>2 && $s-2, $s=0 ) : $s++ for @_,1;
+  $c>0?0:1
+}
+
+is( insert_zero( $_->[0][0], @{$_->[0][1]} ), $_->[1] ) for @TESTS;
+is( insert_zero_simultaneous( $_->[0][0], @{$_->[0][1]} ), $_->[1] ) for @TESTS;
+
+done_testing();