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Fast RegExp question.
I must check whether a given string contains aaa but not contains bbb. I can use only regexp (http://www.regular-expressions.info/).
Examples:
aaa – okbbb – failaaabb – okaaabbb – failaaaTEXT – okaaaTEXTbbb – failaaTEXTa – fail
use this regex
(?=.*a{3})(?!.*b{3}).+(?=.*a{3})contain aaa(?!.*b{3}).+dont contain bbb.+select all string which satisfies the conditions