Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

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There's also Stream.broadcast() for push-based multi-consumer scenarios. Both require you to think about what happens when consumers run at different speeds — because that's a real concern that shouldn't be hidden.

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十万级电车聪明了不少|记者过年

「在我被抓之前,我在美國生活的這幾年,我就是很低調、默默獨自生活,很多時候遇到有問題我都是自己面對、自己解決,我都盡量不去求別人來幫我。」