Selective Exercise Lanes

Use these short lanes only after completing the matching guide pages. They reinforce the Semester 0 basics without turning this module into the complete Clean Code course.

Lane 1: Readability and Intent

Audit one small file for ambiguous names, redundant comments, and visual grouping. Make at least three changes and justify each in one sentence.

Optional support:

• Chapter 2: Meaningful Names
• Chapter 4: Comments
• Chapter 5: Formatting

Lane 2: Function Honesty

Choose one function with mixed responsibilities, too many arguments, or a hidden side effect. Refactor it in small steps while preserving behavior.

Optional support:

• Chapter 3: Functions

Lane 3: Tests as Explanations

Write or improve three tests so each name states one behavior. Make one structural change to the production code and show that the tests still pass.

Optional support:

• Chapter 9: Keeping Tests Clean
• Chapter 9: F.I.R.S.T.

Completion Checklist

• Completed all three short lanes
• Recorded at least one mistaken assumption and its correction
• Preserved behavior while improving structure
• Deferred class, system, and review-level analysis to Semester 3