the list is nice, but I have some note.

I will add, at the end:

• Special variables
  • Why $a and $b should never be used? and why you did not noticed in previous examples? Is the following admitted?
    @ord sort {$a<=>$b} @unsort;
  • Name 5 special variables you know.

Then, at least for me, an example looks too much edge case, or due to familiarity with other languages (desease I'm immune to, but can be useful for others having other experience): $h = {%h} personally I never seen used this way and I'd stress the standard form to take reference as in \%h and ( UPDATE after a glass of beer I now see the sense of the question about anonymous datastructure and a reference).Here i'll ask also about \(a..z) syntax.

There is nothing about regexes:you can at least ask how to make regexes more readable.

Core modules are important to know: they would deserve a long section with many named, but at least you can ask:

• Core modules
  • Name 5 core modules you use and tell why

> So, do you know Perl?

So and so, but I know where to read and where to ask!

L*

UPDATE

> Unfortunately it's a very stubborn windows context..

I know this, but you can tempt them: This happened 5000 seconds ago, ie? perl -e "print scalar localtime (time - 5000)" or with mass editing or with -lne