SAMS Teach Yourself Perl in 24 Hours THIRD EDITION

A Quick Tour

What follows is a quick tour of some of the modules already installed on your system as part of the core Perl distribution.

Exploring Files and Directories

In Hour 10, you learned how to open directories and read lists of filenames contained within those directories. At that time, when the subject of reading subdirectories came up, you were told not to be concerned. Now you'll learn how to traverse directories and subdirectories recursively.

You might write a common program to find a particular file without knowing exactly what directory it's in. For example, suppose you want to find a file named important.doc somewhere beneath the directory documents, as shown here:

This illustration shows a directory structure under a parent directory ...