What's the difference between arrays and lists?
One of the most common sources of confusion for new Perl programmers is the difference between arrays and lists. Although they sometimes look similar, they are very different things, and many bugs and misunderstandings are caused by not having a full understanding of the differences. Even experienced Perl programmers sometimes think arrays and lists are the same, but they are quite different in several important ways.
Read more at my blog: Arrays vs. Lists in Perl: What's the Difference?
I'd also love to hear if you can think of any examples that I didn't cover.