task solved #5225
task solved #5225
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Review Summary
This is a good start, and the overall structure is on the right track. However, a couple of critical issues are preventing the code from working as expected, so I am requesting changes.
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The
defaultcase in yourswitchstatement introduces a bug. It pushes a direct reference tostateCopyinto the history, which means later modifications will incorrectly change past states. It also creates duplicate entries for unknown actions. Thedefaultblock should be empty, as the state is already correctly pushed to the history after theswitchstatement. This addresses violations of [CHECKLIST ITEM #1] and [CHECKLIST ITEM #4]. -
For the
'clear'action, the requirement is to "create an empty state object." To achieve this, you should changeconst stateCopytolet stateCopyat the top of the function. This will allow you to reassignstateCopy = {}inside the'clear'case.
Once you've fixed these two points, your solution will be in great shape!
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Important
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Footnotes
src/transformStateWithClones.js
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| */ | ||
| function transformStateWithClones(state, actions) { | ||
| // write code here | ||
| const stateCopy = { ...state }; |
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Using const here prevents you from reassigning stateCopy. For the 'clear' action, the requirement is to "create an empty state object," which is best done by assigning a new empty object (e.g., stateCopy = {}). Consider changing const to let to allow for this reassignment and then updating the 'clear' case accordingly.
src/transformStateWithClones.js
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| } | ||
|
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| default: | ||
| stateHistory.push(stateCopy); |
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This line introduces a bug and should be removed.
- Checklist item Solution #1 violation: It pushes a direct reference to
stateCopy, not a clone. Any later changes tostateCopywould also change this record in thestateHistory. - Checklist item Solution #4 violation: The state is already correctly pushed on line 39 for every action. This line creates a duplicate entry for unknown actions.
The default block should be empty or just contain break;.
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Review Summary
Excellent work on this submission! I'm happy to approve your solution. You've done a great job of addressing the previous feedback, and the implementation is now robust and correct. The state is managed immutably as required, and all the logic for handling the different action types is implemented perfectly. All requirements have been met. Well done!
✨ Please rate this review in the Platform's notification center1. I will be grateful for your feedback! ✨
Footnotes
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