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--
-- Perl Weekly Challenge 275
-- Task 1
-- See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-275>
--
CREATE SCHEMA IF NOT EXISTS pwc275;
CREATE OR REPLACE FUNCTION
pwc275.task1_plpgsql( s text, k text[] )
RETURNS int
AS $CODE$
DECLARE
ok boolean;
current_k text;
current text;
word_counter int := 0;
BEGIN
FOR current IN SELECT word FROM regexp_split_to_table( s, '\s+' ) word LOOP
ok := true;
FOREACH current_k IN ARRAY k LOOP
IF current ~ current_k THEN
ok := false;
END IF;
END LOOP;
IF ok THEN
word_counter := word_counter + 1;
END IF;
END LOOP;
RETURN word_counter;
END
$CODE$
LANGUAGE plpgsql;
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