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| options:xml:search-regexp-not-dot-newline [2014/10/14 00:00] – admin | options:xml:search-regexp-not-dot-newline [2018/01/10 20:41] (current) – external edit 127.0.0.1 |
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| ====== Regular Expression Search: Dot Not Match Newline ====== | ====== Regular Expression Search: Dot Not Match Newline ====== |
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| By default search regular expression used in HippoEDIT ([[http://www.boost.org/doc/libs/1_53_0/libs/regex/doc/html/boost_regex/ref/match_flag_type.html|BOOST Regexp]]) interpret "." symbol in expression as ANY symbol. Including newline character. So that can happen that search with your [[http://en.wikipedia.org/wiki/Regular_expression|greedy regular expression]] will take too long (fex //a.*b// ), while it analyzes whole text , from first "a" till document end. | By default search regular expression used in HippoEDIT ([[http://www.boost.org/doc/libs/1_53_0/libs/regex/doc/html/boost_regex/ref/match_flag_type.html|BOOST Regexp]]) interpret "." symbol in expression as ANY symbol. Including newline character. So that can happen that search with your [[http://en.wikipedia.org/wiki/Regular_expression|greedy regular expression]] will take too long (for example, //a.*b// ), while it analyzes whole text, from first "a" until document end. |
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| There is two ways to solve that: change your expression to non greedy form (that is probably what you want), as fex: //a.*?b// or you can force HippoEDIT to always search within line, if "." is used ("." do not match newline symbol). | There are two ways to solve that: change your expression to nongreedy form (that is probably what you want), as for example: //a.*?b// or you can force HippoEDIT to always search within a line, if "." is used ("." do not match newline symbol). |
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| Default behavior of for processing "." character in HippoEDIT search engine can be controlled by following XML flag in **settings.xml**: | Default behavior of for processing "." character in HippoEDIT search engine can be controlled by following XML flag in **settings.xml**: |
| <note>The feature available from HippoEDIT 1.51.35</note> | <note>The feature available from HippoEDIT 1.51.35</note> |
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| #xml_option #performance #1.51 | #xml_option #performance #1_51 |