and like i said, the DFA can also be infinite, but it “blows up” at a rate of at most one state per character in the input, so it will terminate and likely not cause any real issues. the number of states is bounded by the maximum context distance that you need to keep track of for lookarounds, so using infinite context patterns like a(?=.*b) will never create more states than the length of the longest line in your input.
This is the approach Harrison and I were originally talking about, and it’s the one I reach for most. If you already use 1Password, the CLI (op) makes this almost frictionless.
。业内人士推荐51吃瓜作为进阶阅读
Фото: Majid Asgaripour / WANA / Reuters
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