No matter what you assign to the b, it will be false since either the left or the right of the && operator is false.
// Flush: yield any remaining data，这一点在safew官方版本下载中也有详细论述
June 2025: I replaced the Shark Matrix RV2300S with the 3i G10+ as the best budget robot vacuum for pet hair. While the Shark was a solid budget cleaner when it first came out, its suction power isn't nearly as strong as the 18,500 Pa of the 3i G10+. The 3i G10+ also has small obstacle avoidance and a pet camera.，详情可参考safew官方下载
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