Merge pull request #12409 from wanderdoc/master

PWC 331 (wanderdoc)

2 files changed, 122 insertions, 0 deletions

diff --git a/challenge-331/wanderdoc/perl/ch-1.pl b/challenge-331/wanderdoc/perl/ch-1.pl
new file mode 100644
index 0000000000..7d213b6679
--- /dev/null
+++ b/challenge-331/wanderdoc/perl/ch-1.pl
@@ -0,0 +1,39 @@
+#!perl
+use strict;
+use warnings FATAL => qw(all);
+
+=prompt
+You are given a string.
+Write a script to find the length of last word in the given string.
+
+Example 1
+
+Input: $str = "The Weekly Challenge"
+Output: 9
+
+
+Example 2
+
+Input: $str = "   Hello   World    "
+Output: 5
+
+
+Example 3
+
+Input: $str = "Let's begin the fun"
+Output: 3
+=cut
+
+use Test2::V0 -no_srand => 1;
+is(last_word_length("The Weekly Challenge"), 9, "Example 1");
+is(last_word_length("   Hello   World    "), 5, "Example 2");
+is(last_word_length("Let's begin the fun"), 3, "Example 3");
+done_testing();
+
+
+sub last_word_length
+{
+     my $str = $_[0];
+     return length((grep {length($_) > 0} 
+               split(/\s/,$str))[-1]);
+}
diff --git a/challenge-331/wanderdoc/perl/ch-2.pl b/challenge-331/wanderdoc/perl/ch-2.pl
new file mode 100644
index 0000000000..8ed60257fc
--- /dev/null
+++ b/challenge-331/wanderdoc/perl/ch-2.pl
@@ -0,0 +1,83 @@
+#!perl
+use strict;
+use warnings FATAL => qw(all);
+
+=prompt
+You are given two strings, source and target.
+Write a script to find out if the given strings are Buddy Strings.
+If swapping of a letter in one string make them same as the other then they are `Buddy Strings`.
+Example 1
+Input: $source = "fuck"
+       $target = "fcuk"
+Output: true
+
+The swapping of 'u' with 'c' makes it buddy strings.
+
+
+Example 2
+
+Input: $source = "love"
+       $target = "love"
+Output: false
+
+
+Example 3
+
+Input: $source = "fodo"
+       $target = "food"
+Output: true
+
+
+Example 4
+
+Input: $source = "feed"
+       $target = "feed"
+Output: true
+=cut
+
+# use feature 'state';
+
+
+use List::Util qw(first);
+use constant { true => 1, false => 0 };
+
+use Test2::V0 -no_srand => 1;
+
+is(buddy_strings("fuck", "fcuk"), true, 'Example 1');
+is(buddy_strings("love", "love"), false, 'Example 2');
+is(buddy_strings("fodo", "food"), true, 'Example 3');
+is(buddy_strings("feed", "feed"), true, 'Example 4');
+done_testing();
+
+sub buddy_strings
+{
+     my ($str_1, $str_2) = @_;
+     if ( length($str_1) != length($str_2) )
+     {
+          return false;
+     }
+     my (%ltr_1, %ltr_2);
+     $ltr_1{$_}++ for split(//, $str_1);
+     $ltr_2{$_}++ for split(//, $str_2);
+     my @standard = sort {$a cmp $b} keys %ltr_1;
+     if ( join('', @standard) ne join('', sort {$a cmp $b} keys %ltr_2) )
+     {
+          return false;
+     }
+     if ( join('-', @ltr_1{@standard}) ne join('-', @ltr_2{@standard}) )
+     {
+          return false;
+     }
+     if ( $str_1 eq $str_2)
+     {
+          if ( defined first { $_ > 1 } values %ltr_1 )
+          {
+               return true;
+          }
+          else
+          {
+               return false;
+          }
+     }
+     return true;
+}