2.1 为什么第一步选NFA，不直接上DFA 正则表达式转自动机，正面刚DFA不是不行，但状态合并规则得自己推，遇到括号嵌套很容易出现边界问题。常见做法是分两步走：先用Thompson构造法把正则式转成ε-NFA，再用子集构造法确定化。这样每一步都是机械操作，程序只需要处理局部拼装，不用看整棵语法 ...
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ORLANDO, Fla. — A Texas judge’s ruling that found national registration requirements for certain guns and suppressors unconstitutional could change how Floridians buy those items, though gun shop ...
AUSTIN, Texas — Nearly century-old federal restrictions on certain short-barrel firearms and silencers were lifted Thursday in several states, including Texas, after the Trump administration declined ...
As gun rights supporters celebrate the Justice Department's decision not to appeal the ruling of a Texas federal judge that deregulates a portion of a nearly century-old gun law, which required people ...
Gun rights advocates are wasting little time putting a "huge" federal court victory into action after a judge struck down decades-old firearms restrictions as unconstitutional. Gun Owners of America ...
The Trump administration has yet to appeal a key firearms ruling handed down last week, leaving gun control groups worried and Second Amendment advocates hoping it means the Department of Justice (DOJ ...
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Northern District of Texas decides that registration requirements for non-taxed NFA firearms are no longer grounded in Congress’ power to lay and collect taxes. Silencer Shop next considered the ...
Northern District of Texas decides that registration requirements for non-taxed NFA firearms are no longer grounded in Congress’ power to lay and collect taxes. Silencer Shop next considered the ...
A federal court on Wednesday struck down the National Firearms Act’s registration requirements for certain firearms and accessories. The court ruled in favor of the plaintiffs in their case against ...
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