July 2025: I removed the Shark Matrix RV2300S robot vacuum from this guide. While it was a solid budget mopping robot vacuum for its first year or so on the market, it's now a little bit too basic compared to other newer budget robot vacuums.
DOING IT THE RIGHT WAY
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generates written or spoken text from structured data
Quadtrees aren't limited to point data. They can also partition regions of continuous data, like the pixels of an image.