lookahead

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Regex Replace Between " Encoding

I want to be able to replace styl开发者_如何学运维e="STUFF" I keep thinking that this is the correct REGEX:[详细]

2022-12-26 00:23 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
Why does a positive lookahead lead to captures in my Perl regex?

I can\'t get why this code work: $seq = \'GAGAGAGA\'; my $regexp = \'(?=((G[UCGA][GA]A)|(U[GA]CG)|(CUUG)))\'; # zero width match[详细]

2022-12-24 03:19 分类：问答
LookAhead Regex in .Net - unexpected result

I am a 开发者_开发技巧bit puzzled with my Regex results (and still trying to get my head around the syntax). I have been using http://regexpal.com/ to test out my expression, and its works as intended[详细]

2022-12-23 18:28 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 negative lookahead

In my home directory I have a folder drupal-6.14 that contains the Drupal platform. From this directory I use the following command:[详细]

2022-12-11 11:56 分类：问答
InputStreamReader.markSupported is false

I need to “un-read” characters from an InputStreamReader. For that purpose I wanted to use mark and reset but markSupported returns false for the InputStreamReader class, since it doesn’t maintain[详细]

2022-12-10 14:42 分类：问答
Using lookahead with generators

I have implemented a generator-based scanner in Python that tokenizes a string into tuples of the form (token type, token value):开发者_JAVA技巧[详细]

2022-12-08 04:46 分类：问答