xxxi
• Line 45: Here we define a small helper routine, kvprint(), which prints
a key-value pair when called.
Notes
We use a standard format for notes, cautions, and tips when we want to direct your
attention to an important point, for example.
Note notes are tips, shortcuts, or alternative approaches to the current
discussion topic. ignoring a note should have no negative consequences, but you
might miss out on a nugget of information that makes your life easier.
PrefaCe