1. Pick a feature to implement and see which part of code will it deal with. The best time to cleanup a piece of code is when you are adding a feature to that part of the code.
2. Break the code into smaller methods, rename variables to more meaningful names.
3. Is there duplication? Can we extract a common method to remove duplication of logic?
4. Simplify complex conditional statements, break loops into smaller ones.
5. Look for one of these three problems —
- One class is calling another for everything: The logic needs to be in that class.
- Too much code in one class: There might be scope for a new domain object.
- Complex if conditions: Could possibly be solved with polymorphism.
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