originalBodyOfYieldExpression(v, w) // more or less
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.
，这一点在91视频中也有详细论述
Maybe initially it was like this, but many years have passed since a cute new OS codename “Donut” was released on a couple of phone models.
Explore more offers.