Merge pull request #3018 from wanderdoc/master

Solutions to challenge-091.

2 files changed, 88 insertions, 0 deletions

diff --git a/challenge-091/wanderdoc/perl/ch-1.pl b/challenge-091/wanderdoc/perl/ch-1.pl
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+++ b/challenge-091/wanderdoc/perl/ch-1.pl
@@ -0,0 +1,41 @@
+#!perl
+use strict;
+use warnings FATAL => qw(all);
+
+=prompt
+You are given a positive number $N. Write a script to count number and display as you read it.
+Example 1: Input: $N = 1122234 Output: 21321314 as we read "two 1 three 2 one 3 one 4"
+Example 2: Input: $N = 2333445 Output: 12332415 as we read "one 2 three 3 two 4 one 5"
+Example 3: Input: $N = 12345 Output: 1112131415 as we read "one 1 one 2 one 3 one 4 one 5"
+=cut
+
+
+
+
+use Test::More;
+
+
+
+
+sub count_number
+{
+     my $num = $_[0];
+     my @arr = split(//, $num);
+
+     my @data;
+
+     do { ( scalar @data == 0 or $_ != $data[-1][0] ) ? 
+             push @data, [$_, 1] : $data[-1][1]++ }
+          for @arr;
+     my $output = join('',map { reverse @$_ } @data);
+     return $output;
+}
+
+
+is(count_number(1122234), 21321314, 'Example 1');
+is(count_number(2333445), 12332415, 'Example 2');
+is(count_number(12345), 1112131415, 'Example 3');
+
+
+
+done_testing();
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diff --git a/challenge-091/wanderdoc/perl/ch-2.pl b/challenge-091/wanderdoc/perl/ch-2.pl
new file mode 100644
index 0000000000..e474e9b650
--- /dev/null
+++ b/challenge-091/wanderdoc/perl/ch-2.pl
@@ -0,0 +1,47 @@
+#!perl
+use strict;
+use warnings FATAL => qw(all);
+
+=prompt
+You are given an array of positive numbers @N, where value at each index determines how far you are allowed to jump further. Write a script to decide if you can jump to the last index. Print 1 if you are able to reach the last index otherwise 0.
+Example 1: Input: @N = (1, 2, 1, 2) Output: 1 as we jump one place from index 0 and then two places from index 1 to reach the last index.
+Example 2: Input: @N = (2,1,1,0,2) Output: 0 it is impossible to reach the last index. as we jump two places from index 0 to reach index 2, followed by one place jump from index 2 to reach the index 3. once you reached the index 3, you can't go any further because you can only jump 0 position further.
+=cut
+
+
+
+
+
+use Test::More;
+
+
+
+
+
+
+sub jump
+{
+     my @arr = @_; 
+     die "Array with at least two elements required!$/" if $#arr == 0;
+
+     my $i = 0;
+     while ( $i < $#arr )
+     {
+          my $old_i = $i;
+          $i += $arr[$i];
+          return 0 if ($i == $old_i or $i > $#arr); 
+     }
+     return 1;
+}
+
+
+
+
+
+is(jump(1, 2, 1, 2),          1, 'Example 1');
+is(jump(2, 1, 1, 0, 2),       0, 'Example 2');
+is(jump(1, 3, 2),             0, 'Example 3');
+is(jump(1, 1, 3, 2, 1, 0),    1, 'Example 4');
+is(jump(1, 0),                1, 'Example 5');
+is(jump(0, 1),                0, 'Example 5');
+done_testing();
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