Merge remote-tracking branch 'upstream/master'

2 files changed, 54 insertions, 0 deletions

diff --git a/challenge-258/luca-ferrari/plpgsql/ch-1.sql b/challenge-258/luca-ferrari/plpgsql/ch-1.sql
new file mode 100644
index 0000000000..7e02f746b8
--- /dev/null
+++ b/challenge-258/luca-ferrari/plpgsql/ch-1.sql
@@ -0,0 +1,22 @@
+--
+-- Perl Weekly Challenge 258
+-- Task 1
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-258>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc258;
+
+CREATE OR REPLACE FUNCTION
+pwc258.task1_plpgsql( nums int[] )
+RETURNS int
+AS $CODE$
+   WITH q_nums AS (
+   	SELECT v, array_length( regexp_split_to_array( v::text, '' ), 1 ) as c
+	FROM unnest( nums ) v
+	)
+	SELECT count( * )
+	FROM q_nums
+	WHERE c % 2 = 0;
+
+$CODE$
+LANGUAGE sql;
diff --git a/challenge-258/luca-ferrari/plpgsql/ch-2.sql b/challenge-258/luca-ferrari/plpgsql/ch-2.sql
new file mode 100644
index 0000000000..3241facae4
--- /dev/null
+++ b/challenge-258/luca-ferrari/plpgsql/ch-2.sql
@@ -0,0 +1,32 @@
+--
+-- Perl Weekly Challenge 258
+-- Task 2
+-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-258>
+--
+
+CREATE SCHEMA IF NOT EXISTS pwc258;
+
+CREATE OR REPLACE FUNCTION
+pwc258.task2_plpgsql( k int, nums int[] )
+RETURNS int
+AS $CODE$
+DECLARE
+	v_sum int := 0;
+	count_of_ones int := 0;
+BEGIN
+	FOR i IN 1 .. array_length( nums, 1 ) LOOP
+		SELECT sum( v::int )
+		INTO count_of_ones
+		FROM regexp_split_to_table( i::bit( 8 )::text, '' ) v;
+
+		IF count_of_ones <> k THEN
+		   continue;
+		END IF;
+
+		v_sum := v_sum + nums[ i ];
+	END LOOP;
+
+	RETURN v_sum;
+END
+$CODE$
+LANGUAGE plpgsql;