lookbehind
Use String for Pattern but Exclude it from Being Removed
i\'m pretty new on regex, i have learned something by the way, but is still pour knowledge! so i want ask you for clarification on how it work![详细]
2022-12-28 06:26 分类：问答Naming convention of regex, lookahead and lookbehind
Why is it counter intuitive? /(?<!\\d)\\d{8}(?!\\d)/, here (?<!\\d) comes first, but called lookbehind, (?!\\d) next, but called lookahead. All are counter intuitive.[详细]
2022-12-24 10:42 分类：问答Can you salvage my negative lookbehind example for commifying numbers?
In the \"Advanced Regular Expresssion\" chapter in Mastering Perl, I have a broken example for which I can\'t figure out a nice fix. The example is perhaps trying to be too clever for its own good, bu[详细]
2022-12-21 00:13 分类：问答Problem with look behind assertion and optional substring
I\'m trying to write some regex that will parse information from alerts generated by Hyperic HQ. The alerts come in as emails with a subject line like:[详细]
2022-12-20 20:33 分类：问答Regular expression lookbehind problem
I use (?<!value=\\\")##(.*)## to match string like##MyString##that\'s not in the form of: <input type=\"text\" value=\"##MyString##\">[详细]
2022-12-19 03:02 分类：问答How to use lookbehind or lookahead and replace the matched string?
I am stuck at one more RegEx. Sample input : project description I want to write RegEx. that if word \"description\" is found and its preceded by word \"project\" then prepend \"project descriptio[详细]
2022-12-09 16:38 分类：问答
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