These days, though, native is as bad as the web, if not worse. Consistency is basically out the window. Anything can look like anything, buttons have no borders, contrast doesn’t exist, and neither do conventions. Apple, for example, seems to place traffic lights and corner radius by vibes rather than by any measurable guidelines.
and of course for IsMatch there is no difference in which direction you go, you can just stop at the first match and return true. in fact lookarounds aren’t necessary for IsMatch at all, they are indistinguishable from concatenation. a(?=b) is just ab for the purposes of IsMatch and a(?=.*b)(?=.*c) is just a(.*b_*&.*c_*) - the lookarounds only come into play when you want to know the position of the match, and what is around it. if you happen to use lookarounds in an IsMatch pattern today, consider RE# intersections a faster drop-in replacement with identical semantics.
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The chancellor's Spring Statement gave us one less thing to worry about: no new tax rises from Rachel Reeves today.