Chapter 4: Don’t use $a and $b outside of sort() .
The system didn’t break again. And when someone asked why, Erwin would tap the side of his monitor and say: “The PDF teaches you how to write code for the person who finds your body.”
By Thursday, the Perl script was still ugly. But it was consistent in its ugliness. Every else was cuddled. Every subroutine had a return . Every filehandle used the three-argument open . The auditors, who didn’t read Perl, saw a printed metric: “Cyclomatic complexity: reduced 42%.” They signed off. perl best practices pdf
Erwin stared at the wall. Then, like a vision, he remembered a legendary text: Perl Best Practices by Damian Conway. Not the shiny new edition—the original PDF, the one with the stern cover and the weight of a thousand linting rules.
He thought of the thirty-seven lines where $a held a transaction ID and $b held a customer’s social security number. Chapter 4: Don’t use $a and $b outside of sort()
That Friday, Erwin closed the PDF for the last time. He didn’t delete it. He renamed it to perl_best_practices_FINAL_v2_FINAL.pdf —a small, ironic act of rebellion.
He felt a pang of shame. The core script had neither. But it was consistent in its ugliness
He remembered the line he’d written last year: $data =~ /(.*?),(.*?),(.*?),(.*?),(.*?),(.*?)/; — then six lines of $foo = $4 . It worked. But it was a crime scene.