Sams Teach Yourself Perl in 21 Days, Second Edition

Going Deeper

In this lesson, I've shown you how to use many of the more popular functions for modifying or mangling lists and strings. And, in turn, I've only described the more common uses of these functions. If you're interested in more detail about any of these functions, or about any functions I haven't described in this book, see Appendix A or the perlfunc man page.

Some of the functions in this chapter have features I didn't talk about, mostly because they involve things you haven't learned yet. For example, the sorting routine for the sort function (the part inside the curly brackets) can be replaced with an actual subroutine name, which allows you to use that subroutine in many different places and to write quite sophisticated sort routines ...