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Languages & runtimes · #rect
Using array index as a React key causes unnecessary re-renders and state loss. Learn how stable, unique keys enable efficient reconciliation.
Decide where to place React Server Components and Client Components in Next.js, understand the serialization boundary, and validate with a build inspection.
Android's Rect class enables zero-allocation geometry math in UI code, but its mutable API demands discipline. Learn when to reuse instances for hit-testing performance and when to copy to avoid race conditions and stale-state bugs.
React Server Components move data fetching into the component tree and eliminate API layers — but only if you respect the server/client boundary. A practical walkthrough with a blog index that streams posts from the database and keeps search interactive on the client.
Android developers face a trade-off between integer-based Rect and float-based RectF for touch hit detection. This guide compares the options and shows a code snippet to validate the choice.
Canvas rect() defines a path but does not paint until fill(), stroke(), or clip(). Learn when to use it and how to debug invisible rectangles.
Mixing local and global coordinate spaces is the most common cause of hit-test misses in Flutter custom painters. Here is how to use Rect factories, containment checks, and clipping with explicit coordinate intent.
React’s useTransition lets you flag expensive state updates as low‑priority, keeping input fields and other high‑priority actions snappy. Learn how to wrap a heavy list filter in a transition, what to watch out for, and how to verify the result.
A technical guide to Rect primitives in UI and graphics engines, covering memory layout, coordinate-space boundaries, AABB collision logic, and degenerate-case handling.
react
nextjs
android
javascript
flutter