What are common pitfalls or gotchas with one-liners (-n -p -a -F)?

Perl one-liners using the -n, -p, -a, and -F options can be incredibly powerful but also come with their own set of common pitfalls. Understanding these can help improve your efficiency and avoid mistakes. Below are some of the common gotchas:

• Overwriting the input file: When using -p, be careful not to overwrite the input file inadvertently. Using a redirection operator with -p can lead to data loss.
• Special characters in the input: If your data contains special characters, be sure to handle them appropriately, especially when using -a and -F for field splitting.
• Modifying the input array: When using -a, remember that any modifications to the default array @F may affect subsequent lines unless you explicitly copy it.
• Performance considerations: For larger files, using frequent print statements within a -p or -n loop can make the processing slower.

In summary, while Perl one-liners can save time and effort, it's essential to be aware of these potential pitfalls to ensure effective and error-free processing.