Core Collections · interview question
What is the clearest sign that code around aggregation patterns should be refactored?
Multiple choiceHardchapter-3-curatedpremiumcore-collectionsaggregation-patterns
Answer and explanation
Correct answer
D. When the rule is no longer easy to trace, explain, or change without breaking nearby behavior.
Why
A refactor is justified when the code stops communicating its intent. Write aggregation steps so the reader can see where counts come from and which key controls the grouping.
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