you can match a string by repeatedly taking derivatives for each character. when you’ve consumed the entire input, you check if the resulting regex accepts the empty string (is “nullable”). if yes, the original string matched.
“I’m disappointed matters of national security implications are being aired in public,” says J.D. Russell, who runs the investment firm Alpha Funds, and holds a position in Anthropic. Russell said he respected Anthropic’s positions on mass surveillance and autonomous weapons, but said that “you have to be realistic that adversaries to the U.S. are pursuing those capabilities with far fewer constraints.”
During the global energy crisis, it said it absorbed about £40m of exceptional wholesale costs rather than passing them directly through to bills.，更多细节参见PDF资料
Студенты нашли останки викингов в яме для наказаний14:52，更多细节参见PDF资料
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Так, у рыб, пойманных в загрязненных районах Ладожского озера, уровень фермента цитохром P450-редуктаза, играющего главную роль в разрушении токсинов, в 15-20 раз выше, чем у здоровых особей. Кроме того, у этих рыб обнаружили повреждения печени (до 33 процентов клеток) и органов дыхания.，详情可参考快连下载