note zby From [cpan://Test::More]: <code> ok($this eq $that, $test_name); </code> <blockquote> This simply evaluates any expression ($this eq $that is just a simple example) and uses that to determine if the test succeeded or failed. A true expression passes, a false one fails. Very simple. </blockquote> So it's not exactly what you describe. <p> Additionally a list in scalar context returns it's last value not the number of it's elements. So your explanation of what happens after the <code>keys</code> function is not right. <p> <b>Update:</b> <strike> <code> $ perl -e '%h = (1, 1, 1, 1); print scalar keys %h, "\n"' 1 </code> </strike> <code> $ perl -e 'print scalar (1, "a"), "\n";' a </code> 356122 356147