Фото: Majid Asgaripour / WANA / Reuters
for example, the regex [a-zA-Z] only cares about two kinds of characters: letters and everything else. so instead of individually taking derivatives for 52 alphabet characters a..z, A..Z, we can conclude from the start that there are only two kinds of characters we care about: letters ([a-zA-Z]) and non-letters ([^a-zA-Z]).
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Квартиру в Петербурге затопило кипятком после обрушения потолка20:57
"case study of pub-sub in mini-redis" discusses a case that only