diff --git a/cli/operators.pl b/cli/operators.pl
index a955f40..7609012 100644
--- a/cli/operators.pl
+++ b/cli/operators.pl
@@ -1,6 +1,7 @@
 #!/usr/bin/env perl
 use strict;
 use warnings;
+use 5.0100;
 
 
 sub println {
@@ -132,3 +133,22 @@ print 1 .. 20, "\n";
 print '&' .. '!', "\n";
 print 10 .. -10, "\n";
 print "$_\n" foreach 1 .. 10, "\n";
+
+
+my $scalar = 'hi';
+my @array = qw(one two three);
+my %hash = (
+    hi => 1,
+    ho => 2,
+    he => 3,
+);
+
+if ($scalar ~~ @array) {
+    print "scalar matches array\n";
+}
+if ($scalar ~~ %hash) {
+    print "scalar matches hash\n";
+}
+if (@array ~~ %hash) {
+    print "array matches hash\n";
+}