LLD - Design — Parking Lot System
Why is it important to avoid using ordinal values (like enum.ordinal()) directly for logic decisions in systems using enums like
VehicleType and SpotType?Why is it important to avoid using ordinal values (like enum.ordinal()) directly for logic decisions in systems using enums like VehicleType and SpotType?
hard🧠 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand enum ordinal behavior
Ordinal returns position index of enum constant, which depends on declaration order.Step 2: Analyze risks of using ordinal in logic
If enum order changes, ordinal values change, breaking logic relying on fixed numbers.Final Answer:
Ordinal values can change if enum order changes, causing bugs. -> Option CQuick Check:
Avoid ordinal for logic due to order dependency [OK]
Quick Trick: Never rely on enum ordinal for stable logic [OK]
Common Mistakes:
MISTAKES- Assuming ordinal is constant
- Using ordinal as unique ID
- Ignoring enum order changes
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