Optimize React apps with useMemo & useCallback! These hooks avoid unnecessary re-renders & recalculations, making your app faster & smoother. Learn when to use them & get code examples to get started!

15 essential JavaScript snippets for web developers: manipulate arrays, strings, dates & times, and more with these concise code examples.

Controlled inputs in React: value tied to component's state, updating state on change. Uncontrolled inputs: input manages its own state, accessed via refs or DOM.

6 essential websites for coders: Ray.so for code snippets, Roadmap.sh for career paths, CodePen.io for online coding, Stack Overflow for Q&A, Readme.so for API docs & GitBook for collaborative documentation.