Solution

[BadOfficer]

No description provided.

[mateacademy-ai-mentor]

Review Summary

I’m approving your solution because your isIsogram implementation correctly checks for repeated letters in a case-insensitive way and returns true for the empty string as required. Your Jest tests thoroughly cover the key scenarios: empty input, words with all unique letters, words with repeated letters, and case-insensitive duplicates such as 'Adam' and 'Oops', all using letter-only inputs as specified. The test descriptions are clear and focused on one behavior each, which makes the suite easy to understand and maintain. As a minor optional improvement, you could add a couple more examples (for instance, a longer isogram and a word with multiple different repeated letters) to further solidify confidence, but this is not required for correctness. Overall, your work meets the task’s functional requirements and demonstrates a good testing approach.

---

✨ Please rate this review in the Platform's notification center¹. I will be grateful for your feedback! ✨

Footnotes

1. Rate AI review example ↩