How to Write Unmaintainable Code: A Satirical Guide for Developers

1. Program Naming

Easy‑to‑type variable names . For example: Fred, asdf.

Single‑letter variable names . For example: a, b, c, x, y, z (or a1, a2, … if needed).

Creative misspellings . For example: SetPintleOpening, SetPintalClosing, making code hard to search.

Abstract names . For example: ProcessData, DoIt, GetData… so vague they say nothing.

Acronyms . For example: WTF, RTFSC, or even Chinese pinyin abbreviations like BT, TMD, TJJTDS.

Random capital letters . For example: gEtnuMbER.

Reuse names . Using the same variable name in nested blocks for “effect”.

Accent characters . For example: int ínt (the second ínt is not int).

Underscores . For example: _, __, ___.

Mix languages . Combine English, German, or Chinese pinyin.

Symbolic names . For example: slash, asterix, comma.

Irrelevant words . For example: god, superman, iloveu.

Confuse l and 1 . The letter l and digit 1 can be indistinguishable.

2. Disguised Deception

Interleave comments and code .

for(j=0; j<array_len; j+=8) {
    total += array[j+0];
    total += array[j+1];
    total += array[j+2];
    /* Main body of
       total += array[j+3]; * loop is unrolled
       total += array[j+4]; * for greater speed.
       total += array[j+5]; */
    total += array[j+6];
    total += array[j+7];
}

Code and UI mismatch . UI shows “postal code” while code uses “zipcode”.

Hide global variables . Pass globals as function parameters to disguise them.

Similar variable names . e.g., swimmer vs swimner, ilI1|, oO08, parseInt vs parselnt.

Overloaded functions . Same name, unrelated implementations.

Operator overloading abuse . Overload ! to return an integer, then chain !!! for bizarre behavior.

3. Documentation and Comments

Lie in comments . Don’t update comments when code changes.

Write nonsense in comments . e.g., /* add 1 to i */.

Comment only the what, not the why .

Never comment secrets . Hide critical logic from documentation.

Over‑detail documentation . Write hundreds of pages with deep numbering.

Gotchas . Never comment on pitfalls.

Vent frustrations in comments .

4. Program Design

Java casts . Overuse type casting from collections.

Exploit Java redundancy . e.g., Bubblegum b = new Bubblegom();

Never validate . Skip input and return‑value checks.

No encapsulation . Expose all internal details.

Copy‑paste cloning . Duplicate code instead of understanding it.

Huge listeners . One listener with massive if‑else chains for all buttons.

Use three‑dimensional arrays . Even four‑dimensional if needed.

Mix getters/setters with public fields . Confuse maintainers.

Deep wrapper chains . Wrap APIs 6‑8 times, depth >4.

Make everything public . No access restrictions.

Swap parameter order repeatedly . e.g., drawRectangle(height, width) then reverse.

Rename methods arbitrarily . setAlignment → setLeftAlignment, setRightAlignment, etc.

Keep dead code . Preserve unused variables, methods, classes.

Finalize all subclasses . Prevent inheritance extensions.

Avoid layout managers . Hard‑code GridBagLayout coordinates.

Scatter environment‑variable initialization . Initialize members via env vars in unrelated functions.

Mislead configuration files . Parameter names differ from code.

Inflate classes . Pack many unrelated methods into one class.

Deep inheritance hierarchies . Ten levels for ten fields.

XML chaos . Replace short code with verbose XML.

Decompose conditions . a==100 → a>99 && a<101.

Abuse semicolons . if (a); else; { int d; d=c; }

Indirect casting . new Double(d).toString() instead of Double.toString(d).

Excessive nesting . >10 parentheses or >20 nested blocks.

Long code lines . Make lines as long as possible.

Avoid early returns . Use deep if‑else instead of break.

5. Testing

Never test . Skip error‑handling tests.

No performance testing . Blame the machine.

Don’t write test cases . Skip coverage and automation.

Call testing cowardly . Claim brave programmers don’t need tests.

6. Other

Obey the boss . Follow any unreasonable directive.

Hide bugs from support . Ignore user reports or blame the user.

Keep big secrets . Never disclose critical bugs.

Sell hype . Label bad code with GoF patterns or agile buzzwords.

In short, the motto is Write Everywhere, Read Nowhere .