The Single Letter Variable Syndrome

Ah, the single-letter variable. The sacred 'a'. Because why waste precious keystrokes on descriptive names like 'userAccountSettings' when you can just slap down an 'a' and call it a day? Sure, future you will have absolutely no idea what 'a' represents when debugging at 3 AM, but present you saved a whole 18 characters. Efficiency at its finest. And don't worry about code reviews - just tell them "it's temporary" even though we both know that 'a' will survive in production longer than most of your relationships.