Programming ((tool))s and techniques survive and spread in a chaotic, evolutionary way. It's not always the best or brilliant ones that win but rather the ones that function well enough within the right niche or that happen to be integrated with another successful piece of technology.

There is also a `\b` marker that matches _word boundaries_, positions that have a word character one side, and a non-word character on the other. Unfortunately, these use the same simplistic concept of word characters as `\w`, and are therefore not very reliable.

Note that these boundary markers don't match any actual characters. They just enforce that a given condition holds at the place where they appears in the pattern.

To conclude the chapter, we'll look at a problem that calls for ((regular expression))s. Imagine we are writing a program to automatically collect information about our enemies from the ((Internet)). (We will not actually write that program here, just the part that reads the ((configuration)) file. Sorry.) The configuration file looks like this: