Solution #5218
Solution #5218
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Review Summary
Great job on implementing the core logic for state transformation and correctly avoiding mutations! Your code handles all the actions as expected. However, a couple of changes are needed to meet the task's specific requirements. The current implementation uses a series of if statements, but the task requires a switch statement to handle the different action types [CHECKLIST ITEM #2]. Additionally, this switch statement must include a default case to handle unknown actions, which is also a requirement [CHECKLIST ITEM #3]. Please refactor your conditional logic, and your solution will be good to go!
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Footnotes
src/transformStateWithClones.js
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| if (action.type === 'clear') { | ||
| newState = {}; | ||
| } | ||
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| if (action.type === 'addProperties') { | ||
| Object.assign(newState, action.extraData); | ||
| } | ||
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| if (action.type === 'removeProperties') { | ||
| for (const key of action.keysToRemove) { | ||
| delete newState[key]; | ||
| } | ||
| } |
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This implementation uses a series of if statements to handle different action types. According to the checklist, this should be refactored into a switch statement. This violates checklist item #2: 'Use switch statement if you have limited amount of conditions.' Also, remember to include a default case for error handling as required by checklist item #3.
mateacademy-ai-mentor
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Review Summary
Excellent work refactoring your code to use a switch statement and adding a default case! You're very close to a complete solution.
However, one change is needed to meet all requirements. Your default case is currently empty, which means any unknown action types will be silently ignored. This violates the requirement for proper error handling [CHECKLIST ITEM #3].
To resolve this, please update the default case to throw an error. This ensures that unexpected actions are explicitly flagged as errors, making the function more robust.
✨ Please rate this review in the Platform's notification center1. I will be grateful for your feedback! ✨
Important
Fix the issues, commit the changes, and then re-request my review using the Re-request review button2 in the Reviewers tab.
Tip
If you have any comments about this review, please leave a message in the Add a comment section below and mention me with the @mateacademy-ai-mentor tag3.
I will read your message during my next review of your pull request. Please do not reply directly to my comments, as that feature is not supported yet.
Caution
Do not close the pull request until the review is complete. Closing it early can lead to unexpected behavior and disrupt the review process.
Footnotes
src/transformStateWithClones.js
Outdated
| default: | ||
| break; |
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This addresses the previous feedback by adding a default case, which is a great step forward. However, this violates checklist item #3: 'switch/case should always have default case for error handling'. An empty default case silently ignores unknown actions. To properly handle this as an error, you should consider throwing an error when an unknown action type is encountered.
mateacademy-ai-mentor
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mateacademy-ai-mentor
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Review Summary
Excellent work on this task! I'm happy to approve your solution. You've done a fantastic job of addressing the feedback from the previous review, especially with the implementation of error handling for unknown action types [CHECKLIST ITEM #3]. Your code is now clean, correct, and meets all the requirements perfectly. I was particularly impressed with how you structured your logic to avoid repetition by placing common code outside the switch block [CHECKLIST ITEM #4]. Keep up the great work!
✨ Please rate this review in the Platform's notification center1. I will be grateful for your feedback! ✨
Footnotes
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