Bad Programming Practices 101

A witty guide to what not to do in code 💻

Bad Programming Practices 101 takes an unusual but effective angle: it teaches programming by spotlighting the habits that cause bugs, confusion, and rejected code reviews. Rather than promising a single “best” way to write software, Karl Beecher focuses on the mistakes that experienced developers recognize immediately and beginners often make by accident.

This second edition keeps the book grounded in core programming topics—layout and structure, variables, conditionals, loops, subroutines, error handling, modules, classes and objects, testing, and debugging—while adding a new chapter on how not to use AI on programming projects. The result is a practical, sharply observed handbook for anyone who wants to understand why certain coding choices backfire.

What the book emphasizes

• Common bad habits that make code harder to read, test, and maintain
• The relationship between structure, clarity, and reliability
• How poor choices in variables, control flow, and error handling can ripple through a program
• Why testing and debugging are easier when anti-patterns are avoided early
• The risks of leaning on AI tools without careful judgment

Who it suits

The intended audience is early-career programmers, including students, apprentices, and junior developers with some practical coding experience. It is especially useful for readers who learn well from examples, contrast, and a little dry humor.

Why it stands out

Beecher’s approach is memorable because it is honest: instead of abstract slogans, it shows how messy code habits show up in real programming work. The tone is light, but the lessons are serious enough to help readers build better instincts as they grow.

If you want a programming ebook that is both entertaining and genuinely useful, this one earns its place on the digital shelf.