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。业内人士推荐下载安装汽水音乐作为进阶阅读
Apple has kicked off the week with the announcement of a new iPad Air, now powered by the M4 chip. This is a fairly modest update, moving the device from the previous M3 to the M4 but otherwise keeping the same hardware and design. The company also announced a new price-friendly smartphone, the iPhone 17e.
Американскому сенатору стало «страшнее, чем когда либо» после брифинга по Ирану02:37
a very common use case for regexes is to find matches that are preceded or followed by some context. a classical example being all lines that end with ‘a’. this requirement is usually expressed with a lookahead, where upon finding an ‘a’, you look ahead to check if it’s the end of the line. in a backtracking engine, this is very easy to implement - you just duct-tape the logic that checks the next character, but in a DFA-based engine, this is impossible because you cannot report “the match is here” if the next character is not even known yet. and by the time you know the next character, the position information is lost, so you can’t report the match retroactively (well, unless the distance is fixed of course..).