---
title: "Discussion on \"Day 9 of 100days of code\" | Hashnode"
description: "Discussion on \"Day 9 of 100days of code\". Hello and welcome to day 9 of my challenge! 💪💪🙋‍♀️🙋‍♀️"
url: "https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0"
---

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# [Day 9 of 100days of code](https://kaylah.hashnode.dev/day-9-of-100days-of-code?utm_source=hashnode&utm_medium=feed)

Hello and welcome to day 9 of my challenge! 💪💪🙋‍♀️🙋‍♀️

Jan 23, 2024 · 2 min read · kaylah.hashnode.dev  
Read the article

-   [#reactjs](https://hashnode.com/tag/reactjs)
-   [#100daysofcode](https://hashnode.com/tag/100daysofcode)
-   [#web-development](https://hashnode.com/tag/web-development)

## Written by

[chioma christopher](https://hashnode.com/@Kaylah)

@Kaylah

  
[View profile](https://hashnode.com/@Kaylah)

Frontend developer

## Responses 1

Markdown supported · ⌘↵ to post

[Ndeye Fatou Diop](https://hashnode.com/@fatou)

[Jan 23, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854)

Very cool post ! Way to go 💪. By the way you don’t need the key in the li inside the item : you already added it when doing the .map() 😊

[chioma christopher](https://hashnode.com/@Kaylah)

[Jan 23, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b04a1c358b0c09755a2368)

Thank you so much I just updated it. Correct now?. [Ndeye Fatou Diop](https://hashnode.com/@fatou)

[Ndeye Fatou Diop](https://hashnode.com/@fatou)

[Jan 24, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b0bd0495d5ed231d2acf3d)

[chioma christopher](https://hashnode.com/@Kaylah) yep ! The way you can check is that normally if you don’t have the keys set up properly React should show an error in the console like « Warning: Each child in a list should have a unique “key” prop. ». If you don’t see it you’re good to go ☺️

[chioma christopher](https://hashnode.com/@Kaylah)

[Jan 24, 2024](https://hashnode.com/posts/day-9-of-100days-of-code/65b03790a142103ccde956e0/comment/65b044a613160a084305f854#reply-65b0f6cb3455af42532c4e17)

Thank you so much for this. [Ndeye Fatou Diop](https://hashnode.com/@fatou)