Solution #5228
Solution #5228
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Review Summary
Your solution correctly implements the core logic for state transformation and handles immutability well. However, this requires changes because a couple of key requirements from the project checklist have been missed.
Specifically, your implementation uses a series of if statements, but the task requires a switch statement to handle the different action types [CHECKLIST ITEM #2]. A switch statement should also include a default case to manage unexpected actions, which is currently missing [CHECKLIST ITEM #3].
Please refactor your conditional logic to use a switch statement. Also, consider renaming the stateClones variable to something singular like stateCopy for better clarity [CHECKLIST ITEM #5].
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Footnotes
src/transformStateWithClones.js
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| */ | ||
| function transformStateWithClones(state, actions) { | ||
| // write code here | ||
| let stateClones = { ...state }; |
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This violates checklist item #5: '[NAMING] - use proper names for object copy'. The variable name stateClones is plural, which can be misleading since it holds a single state object at any given time. A singular name like stateCopy or currentState would be clearer.
src/transformStateWithClones.js
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| if (type === 'addProperties') { | ||
| stateClones = { ...stateClones, ...extraData }; | ||
| } | ||
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| if (type === 'removeProperties') { | ||
| stateClones = { ...stateClones }; | ||
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| for (let q = 0; q < keysToRemove.length; q++) { | ||
| delete stateClones[keysToRemove[q]]; | ||
| } | ||
| } | ||
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| if (type === 'clear') { | ||
| stateClones = {}; | ||
| } |
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This implementation violates checklist item #2: '[CODE STYLE]: Use switch statement if you have limited amount of conditions' and #3: '[CODE STYLE]: switch/case should always have default case for error handling'. You should use a switch statement to handle the different action type values, and include a default case to manage any unexpected action types.
mateacademy-ai-mentor
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mateacademy-ai-mentor
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Review Summary
Great job refactoring to use a switch statement! That's a significant improvement. However, I'm requesting changes for a critical issue with your error handling.
Your default case currently executes return stateClones;, which causes the function to exit prematurely and return a single object instead of the expected array of states. This breaks the function's contract. To fix this, the default case should simply use break; to ignore the unknown action and allow the loop to continue.
Also, as mentioned previously, the variable stateClones should be renamed to something singular like stateCopy, as it holds only a single copy of the state [CHECKLIST ITEM #5].
Once you've addressed the default case logic, this will be ready for approval!
✨ 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
| */ | ||
| function transformStateWithClones(state, actions) { | ||
| // write code here | ||
| let stateClones = { ...state }; |
There was a problem hiding this comment.
This variable holds a single copy of the state, so a singular name like stateCopy would be more accurate and align with the naming conventions mentioned in the checklist. This was also mentioned in the previous review. This violates checklist item #5: '[NAMING] - use proper names for object copy'.
src/transformStateWithClones.js
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| stateClones = {}; | ||
| break; | ||
| default: | ||
| return stateClones; |
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The function is expected to return an array of states (stateHistory). However, in the default case, you are returning the current stateClones object. This causes the function to exit prematurely with the wrong data type if it encounters an unknown action. The default case should handle errors without breaking the function's contract; for instance, by simply using break; to ignore the invalid action and continue processing.
mateacademy-ai-mentor
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Review Summary
Excellent work on this revision! I'm happy to approve your solution. You've done a great job addressing the feedback from the previous review. Specifically, the default case in your switch statement is now handled perfectly [CHECKLIST ITEM #3], and the variable renaming to stateCopy makes the code much clearer [CHECKLIST ITEM #5]. The implementation is now clean, correct, and fully meets all the requirements. Well done!
✨ Please rate this review in the Platform's notification center1. I will be grateful for your feedback! ✨
Footnotes
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