Re: Match a pattern multiple times, returning matches, captures and offset?

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From	7stud -- <bbxx789_05ss@yahoo.com>
Newsgroups	comp.lang.ruby
Subject	Re: Match a pattern multiple times, returning matches, captures and offset?
Date	Thu, 7 Apr 2011 14:04:14 -0500
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Brian Candler wrote in post #991406:
> 7stud -- wrote in post #991338:
>> You can also get relative beginning offsets like this:
>>
>> str = "_foo_ _bar_"
>>
>> str.scan(/_(\w+)_/) do |curr_match|
>>   md = Regexp.last_match
>>   whole_match = md[0]
>>   captures = md.captures
>>
>>   captures.each do |capture|
>>     p [whole_match, capture, whole_match.index(capture)]
>>   end
>>
>> end
>
> Using 'index' doesn't work if you have multiple captures which have the
> same pattern, or one is a substring of the other.
>
> Use captures.begin and captures.end instead.
>

begin() and end() are the two elements of offset(), which we've already 
discussed above:

 The idea was to get the relative offsets within a match, not the 
absolute offsets within the string.

-- 
Posted via http://www.ruby-forum.com/.

Thread

Match a pattern multiple times, returning matches, captures and offset? Markus Fischer <markus@fischer.name> - 2011-04-05 12:22 -0500
  Re: Match a pattern multiple times, returning matches, captures and offset? Brian Candler <b.candler@pobox.com> - 2011-04-05 13:07 -0500
  Re: Match a pattern multiple times, returning matches, captures and offset? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-05 20:37 -0500
    Re: Match a pattern multiple times, returning matches, captures and offset? Robert Klemme <shortcutter@googlemail.com> - 2011-04-06 04:42 -0500
  Re: Match a pattern multiple times, returning matches, captures and offset? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-06 18:58 -0500
    Re: Match a pattern multiple times, returning matches, captures and offset? Robert Klemme <shortcutter@googlemail.com> - 2011-04-07 02:13 -0500
    Re: Match a pattern multiple times, returning matches, captures and offset? Brian Candler <b.candler@pobox.com> - 2011-04-07 03:39 -0500
      Re: Match a pattern multiple times, returning matches, captures and offset? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-07 14:04 -0500
        Re: Match a pattern multiple times, returning matches, captures and offset? Brian Candler <b.candler@pobox.com> - 2011-04-08 02:19 -0500
          Re: Match a pattern multiple times, returning matches, captures and offset? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-08 14:53 -0500

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