4 require Config; import Config;
5 if ($Config{extensions} !~ /\bList\/Util\b/) {
6 print "1..0 # Skip: List::Util was not built\n";
11 use List::Util qw(sum);
15 print "not " if defined sum;
18 print "not " unless sum(9) == 9;
21 print "not " unless sum(1,2,3,4) == 10;