Avoid Repeated Parameters of the Same Type

Overview

Multiple parameters of the same type invite mix-ups.

When a function takes (string, string, string), it's easy to pass arguments in the wrong order. Use named parameters (objects) to make calls self-documenting.

When to Use This Skill

• Functions with 2+ parameters of the same type
• Parameters that are easy to confuse
• APIs that users will call frequently
• Refactoring confusing function signatures

The Iron Rule