Lazy DFAs (2010) are a clever optimization to mitigate the O(2^m) blowup of DFA construction, by only constructing the states that you actually visit. lazy DFAs reduce the theoretical automata construction time to either O(2^m) or O(n), whichever is lower. you could argue that it’s theoretically no longer linear time, since you could have a regex that creates a new state for every character in the input, but in practice you will keep revisiting the same states. for all intents and purposes it behaves more like O(n) with some initial wind-up time. the main downside of lazy DFAs is that they are more complex to implement, and you have to ship a compiler as part of your regex algorithm. i want to highlight Rust regex and RE2 as excellent implementations of this approach, which you can also see in the benchmarks.
The price cap is revised by the energy regulator for Great Britain every three months. It said that from April the cost of the average annual dual-fuel bill would drop to £1,641, down from £1,758 today.
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The fact that Germany felt the need to spell out very clearly this week that it does not plan to boost its military presence in the Middle East, never mind take part in any offensive action, comes down to the fact that Germans are still very conflict-shy, largely based on their country's past.
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第一百条 违反治安管理行为人、被侵害人或者其他证人在异地的，公安机关可以委托异地公安机关代为询问，也可以通过公安机关的视频系统远程询问。。关于这个话题，爱思助手下载最新版本提供了深入分析