--- title: Best DEV posts — October 2022 | daily.dev description: The most upvoted DEV posts from October 2022, curated by the daily.dev community. canonical: https://daily.dev/sources/devto/best-of/2022/10 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/devto/best-of/2022/10 og:type: website og:site_name: daily.dev og:title: Best DEV posts — October 2022 | daily.dev og:description: The most upvoted DEV posts from October 2022, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of DEV — October 2022 1. 1 [](https://daily.dev/posts/react-just-got-even-more-awesome-69o50fr4d "React Just Got Even More Awesome") Article DEV · 4y React Just Got Even More Awesome The use hook is only meant to handle async behaviour, not caching or other advanced features. It's a step in the right direction for the react team and a welcome addition to the react ecosystem. If you're looking for a more advanced data fetching library, react-query is still the way to go. 324 22 2. 2 [](https://daily.dev/posts/learn-this-before-react-k6-nkvmqi "Learn this before React") Article DEV · 4y Learn this before React The destructuring rest & spread operator promises map and filter methods. The find method returns the first element that satisfies the condition. FindIndex returns the index of that \["jack", "pritom" The spread operator enables us to spread the content of a iterable (i.e. array) into individual elements Spread. In simple terms promises are used to handle asynchronous operations. 228 17 3. 3 [](https://daily.dev/posts/from-zero-to-devops-engineer---devops-roadmap-for-your-specific-background--maru3uexl "From Zero to DevOps Engineer - DevOps Roadmap for YOUR specific background 🔥") Article DEV · 4y From Zero to DevOps Engineer - DevOps Roadmap for YOUR specific background 🔥 A part of DevOps skillset is to create a process of handling discovered issues in production instead of having a panic mode. 207 9 4. 4 [](https://daily.dev/posts/please-do-repeat-yourself-dry-is-dead--detdft1dx "Please do repeat yourself (DRY is dead)") Article DEV · 4y Please do repeat yourself (DRY is dead) Don't repeat yourself (DRY is dead) is the root of all software evil, says John Sutter. Repeating yourself is basically giving yourself the time and space to come up with the right abstractions instead of engaging in guesswork and clairvoyance. 194 33 5. 5 [](https://daily.dev/posts/understanding-async-await-yc3aezp0u "Understanding Async & Await") Article DEV · 4y Understanding Async & Await A Promise is a primitive data type that represents a future value. It's a JavaScript object with two pieces of information: the promise state, and a value or error. A promise is settled when the promise has either fulfilled or rejected. With 30+ real-world exercises you'll transform knowledge into a practical skill that will make you a better developer. 189 10 6. 6 [](https://daily.dev/posts/what-is-cors--b2dewy-13 "What is CORS?") Article DEV · 4y What is CORS? Cross-Origin Resource Sharing (CORS) is an HTTP-based security mechanism controlled and enforced by the client. It allows a service to indicate any origin other than its own from which the client can request resources. A request may be blocked by CORS policy not only because of the incorrect origin, but also incorrect HTTP header, HTTP method or Cookie header. 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