# Regex returning less number of groups - where is the error? **URL:** \ **Category:** Ruby\ **Created:** [March 16, 2009, 3:13am UTC](https://www.ruby-forum.com/t/regex-returning-less-number-of-groups-where-is-the-error/162950 "2009-03-16T03:13:16Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![knakahara](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/3ab097/32.png) [@knakahara](https://www.ruby-forum.com/u/knakahara)\ **Post date:** [March 16, 2009, 3:13am UTC](https://www.ruby-forum.com/t/regex-returning-less-number-of-groups-where-is-the-error/162950/1 "2009-03-16T03:13:16Z")
Hello! I’m trying to build a regex to count the number of modified files by commit. For example, for the following svn log output: * * * r727998 | bentmann | 2008-12-19 21:50:48 +1100 (Fri, 19 Dec 2008) | 4 lines Changed paths: A /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_de.properties M /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_en.properties [MNG-3451] [MNG-3790] German localization for maven-core Submitted by: Christian Schulte ## o Applied with minor modifications r727871 | brett | 2008-12-19 11:48:07 +1100 (Fri, 19 Dec 2008) | 2 lines Changed paths: M /maven/components/branches/maven-2.0.x M /maven/components/branches/maven-2.0.x/maven-core/src/main/java/org/apache/maven/cli/MavenCli.java [MNG-1830] use ISO 8601 format (not combined for readability) * * * It need to return the revision number and the number of modified files, so the result of match would be something like : Result 1: 1. r727871 | brett | 2008-12-19 11:48:07 +1100 (Fri, 19 Dec 2008) | 2 lines 2. A /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_de.properties 3. M /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_en.properties"] Result 2: 1. r727871 | brett | 2008-12-19 11:48:07 +1100 (Fri, 19 Dec 2008) | 2 lines 2. M /maven/components/branches/maven-2.0.x 3. M /maven/components/branches/maven-2.0.x/maven-core/src/main/java/org/apache/maven/cli/MavenCli.java I tried many variations of the following regular expression: /(^r\d+._?)(?:^Changed paths:\n)(^\s_[MDA]\s(?:/[\w.-]+)+/m but either it returns incomplete results, as: Result 1 1. r727998 | bentmann | 2008-12-19 21:50:48 +1100 (Fri, 19 Dec 2008) | 4 lines 2. A /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_de.properties Result 2 1. r727871 | brett | 2008-12-19 11:48:07 +1100 (Fri, 19 Dec 2008) | 2 lines 2. M /maven/components/branches/maven-2.0.x Would someone be able to help me on this? Thanks in advance!! Kimie ---
**Author:** ![knakahara](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/3ab097/32.png) [@knakahara](https://www.ruby-forum.com/u/knakahara)\ **Post date:** [March 16, 2009, 4:05am UTC](https://www.ruby-forum.com/t/regex-returning-less-number-of-groups-where-is-the-error/162950/2 "2009-03-16T04:05:11Z")
Hi, 2009/3/16 Kimie N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_de.properties > Â M /maven/components/branches/maven-2.0.x > Result 1: > Â Â 3. M > > 1. r727998 | bentmann | 2008-12-19 21:50:48 +1100 (Fri, 19 Dec 2008) | 4 > Would someone be able to help me on this? Thanks in advance!! I guess you want this: /(^r\d+._?)(?:^Changed paths:\n)((?:^\s_[MDA]\s/[\w./-]+\n)+)/m Regards, Park H. ---
**Author:** ![knakahara](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/3ab097/32.png) [@knakahara](https://www.ruby-forum.com/u/knakahara)\ **Post date:** [March 16, 2009, 4:51am UTC](https://www.ruby-forum.com/t/regex-returning-less-number-of-groups-where-is-the-error/162950/3 "2009-03-16T04:51:12Z")
Hi Park, thank you for the quick answer. Using your regex, I get the following result: Result 1 1. r727998 | bentmann | 2008-12-19 21:50:48 +1100 (Fri, 19 Dec 2008) | 4 lines 2. A /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_de.properties M /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_en.properties Result 2 1. r727871 | brett | 2008-12-19 11:48:07 +1100 (Fri, 19 Dec 2008) | 2 lines 2. M /maven/components/branches/maven-2.0.x M /maven/components/branches/maven-2.0.x/maven-core/src/main/java/org/apache/maven/cli/MavenCli.java I returns all modified lines, but in the same group. So, for example, to know how many files were modified in revision 727998, I would have to work on the result[0][1] and result[1][1] ( (or 1.2 and 2.2 as in example above) to extract the number of modified files. Maybe splitting the text and counting how many files were modified (1 per line). Actually I tried to do it splitting by \n, but it didn’t work. So what I was wondering if it possible to return each modified line as a diferent group, as I said in the first email. Or, if you can suggest a way to break the lines of results[0][1] and results[1][1], it would make it too! Thank you! Kimie ---
**Author:** ![knakahara](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/3ab097/32.png) [@knakahara](https://www.ruby-forum.com/u/knakahara)\ **Post date:** [March 16, 2009, 5:47am UTC](https://www.ruby-forum.com/t/regex-returning-less-number-of-groups-where-is-the-error/162950/4 "2009-03-16T05:47:27Z")
2009/3/16 Kimie N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > /maven/components/branches/maven-2.0.x/maven-core/src/main/resources/org/apache/maven/messages/messages\_en.properties > to know how many files were modified in revision 727998, I would have to > work on the result[0][1] and result[1][1] ( (or 1.2 and 2.2 as in > example above) to extract the number of modified files. Â Maybe splitting > the text and counting how many files were modified (1 per line). > Actually I tried to do it splitting by \n, but it didn’t work. So what I > was wondering if it possible to return each modified line as a diferent > group, as I said in the first email. > > Or, if you can suggest a way to break the lines of results[0][1] and > results[1][1], it would make it too! Or try with the more simple regex: /(^r\d+._?)(?:^Changed paths:\n)|(^\s_[MDA]\s/[\w./-]+\n)/m Regards, Park H. ---
**Author:** ![knakahara](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/3ab097/32.png) [@knakahara](https://www.ruby-forum.com/u/knakahara)\ **Post date:** [March 17, 2009, 5:56am UTC](https://www.ruby-forum.com/t/regex-returning-less-number-of-groups-where-is-the-error/162950/5 "2009-03-17T05:56:05Z")
Yep, the simpler regex does the job. Thanks a lot!