This is week 207

3 files changed, 67 insertions, 0 deletions

diff --git a/challenge-207/peter-campbell-smith/blog.txt b/challenge-207/peter-campbell-smith/blog.txt
new file mode 100644
index 0000000000..f095018792
--- /dev/null
+++ b/challenge-207/peter-campbell-smith/blog.txt
@@ -0,0 +1 @@
+http://ccgi.campbellsmiths.force9.co.uk/challenge/207/1
diff --git a/challenge-207/peter-campbell-smith/perl/ch-1.pl b/challenge-207/peter-campbell-smith/perl/ch-1.pl
new file mode 100755
index 0000000000..e8308e39ad
--- /dev/null
+++ b/challenge-207/peter-campbell-smith/perl/ch-1.pl
@@ -0,0 +1,32 @@
+#!/usr/bin/perl
+
+# Peter Campbell Smith - 2023-02-20
+
+use v5.28;
+use utf8;
+use warnings;
+
+# We are given an array of words and asked to write a script to print all the words in the 
+# array that can be typed using the letters on only one row of the keyboard.
+
+# Blog: http://ccgi.campbellsmiths.force9.co.uk/challenge/207/1
+
+linear_words('Hello','Alaska','Dad','Peace');
+linear_words('OMG','Bye');
+linear_words('typewriter', 'zmncbxvz', 'shakalshas');
+linear_words(qw[We are given an array of words and asked to write a script to print all the words in the 
+	array that can be typed using the letters on only one row of the keyboard]);
+	
+sub linear_words {
+
+	my (@test, $word, $result);
+	$result = '';
+	
+	# loop over words and save those that are monolinear
+	for $word (@_) {
+		$result .= qq['$word', ] if $word =~ m¦^([qwertyuiop]+|[asdfghjkl]+|[zxcvbnm]+)$¦i;
+	}
+	
+	say qq[\nInput:  ('] . join(q[', '], @_) . qq[')];
+	say qq[Output: (] . substr($result, 0, -2) . qq[)];
+}	
diff --git a/challenge-207/peter-campbell-smith/perl/ch-2.pl b/challenge-207/peter-campbell-smith/perl/ch-2.pl
new file mode 100755
index 0000000000..724f9ac8f2
--- /dev/null
+++ b/challenge-207/peter-campbell-smith/perl/ch-2.pl
@@ -0,0 +1,34 @@
+#!/usr/bin/perl
+
+# Peter Campbell Smith - 2023-02-20
+
+use v5.28;
+use utf8;
+use warnings;
+
+# We are given a list of the number of citations a researcher has received 
+# for each of his published papers, ordered from most cited to least.
+# We are asked to write a script to compute the researcher’s H-index, which is the maximum n
+# where the n'th number in the list is at least n.
+
+# Blog: http://ccgi.campbellsmiths.force9.co.uk/challenge/207/2
+
+h_index(10, 8, 5, 4, 3);
+h_index(25, 8, 5, 3, 3);
+h_index(10, 9, 8, 7, 6, 5, 4, 3, 2, 1);
+h_index(0);
+h_index();
+h_index(4, 4, 4, 4);
+
+sub h_index {
+	
+	my (@list, $j);
+	
+	# loop over list (0-based!) to find first where n'th number in list < $n
+	@list = @_;
+	for ($j = 0; $j < scalar @list; $j ++) {
+		last unless $list[$j] >= $j + 1;
+	}
+	say qq[\nInput:  \@citations = (] . join(', ', @list) . 
+		qq[)\nOutput: $j];
+}