Negative lookahead assertion. This is the opposite of the positive assertion; it succeeds if the contained expression doesn't match at the current position in the string.
前向否定界定符。与肯定界定符相反；当所含表达式不能在字符串当前位置匹配时成功。
Negative lookahead assertion. This is the opposite of the positive assertion; it succeeds if the contained expression doesn't match at the current position in the string.
前向否定界定符。与肯定界定符相反；当所含表达式不能在字符串当前位置匹配时成功。
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