Perl software development can occur at several levels. When first developing the idea for an application, a Perl developer may start with a short program to flesh out the necessary algorithms. After that, the next step might be to create a package to support object-oriented development. The final work is often to create a Perl module for the package to make the logic available to all parts of the application. Andy Sylvester explores this topic with a simple mathematical function. read more.
Traditionally, Unix/Linux/POSIX filenames can be almost any sequence of bytes, and their meaning is unassigned. The only real rules are that "/" is always the directory separator, and that filenames can't contain byte 0 (because this is the terminator). Although this is flexible, this creates many unnecessary problems. In particular, this lack of limitations makes it unnecessarily difficult to write correct programs (enabling many security flaws), makes it impossible to consistently and accurately display filenames, causes portability problems, and confuses users. more ....
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