issues. Splitting, however, carries its own set of complexities with it.
this isn’t just an academic curiosity. flip the alternation order to (ab|a)+ and suddenly PCRE matches the entire string! the | operator in backtracking engines is ordered - it’s not union, it’s “try left first”. the order of branches changes the result, which means | is not commutative. a|b and b|a can give different matches.
，更多细节参见WPS下载最新地址
越是风口，越要算账。越是创富叙事，越要冷静。在热闹之外，看清逻辑，才是对未来最基本的尊重。
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