Re: String.gsub with regex and block

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From	Brian Candler <b.candler@pobox.com>
Newsgroups	comp.lang.ruby
Subject	Re: String.gsub with regex and block
Date	Thu, 7 Apr 2011 10:50:48 -0500
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Alexey Petrushin wrote in post #991484:
> Probably a stupid question, but is there a way to use :gsub replacement
> without $0 $1 $2 $3 (and without "\0\1\2\3")?

There is also $~ (Regexp.last_match); $1/$2/etc are just a facade.

> I would prefer something like:
>
>     "John Smith".gsub /(.+)\s(.+)/ do |name, family|
>       p [name, family]
>
>       # instead of this
>       p [$1, $2]
>     end

"John Smith".gsub /(.+)\s(.+)/ do
  name, family = $~.captures
  p [name, family]
end

Not pretty, but you can wrap it up in your own method:

class String
  def gsubcap(*arg)
    gsub(*arg) { yield $~.captures }
  end
end

"John Smith".gsubcap /(.+)\s(.+)/ do |name, family|
  p [name, family]
end

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

Thread

String.gsub with regex and block Alexey Petrushin <axyd80@gmail.com> - 2011-04-07 10:25 -0500
  Re: String.gsub with regex and block Reid Thompson <Reid.Thompson@ateb.com> - 2011-04-07 10:36 -0500
    Re: String.gsub with regex and block Brian Candler <b.candler@pobox.com> - 2011-04-08 02:20 -0500
  Re: String.gsub with regex and block Brian Candler <b.candler@pobox.com> - 2011-04-07 10:50 -0500
    Re: String.gsub with regex and block 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-07 13:22 -0500
  Re: String.gsub with regex and block Brian Candler <b.candler@pobox.com> - 2011-04-07 10:57 -0500
  Re: String.gsub with regex and block 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-07 13:10 -0500
    Re: String.gsub with regex and block Phillip Gawlowski <cmdjackryan@googlemail.com> - 2011-04-07 13:39 -0500
  Re: String.gsub with regex and block jake kaiden <jakekaiden@yahoo.com> - 2011-04-07 15:57 -0500
    Re: String.gsub with regex and block Sergey Avseyev <sergey.avseyev@gmail.com> - 2011-04-07 22:09 -0700
  Re: String.gsub with regex and block Alexey Petrushin <axyd80@gmail.com> - 2011-04-08 07:31 -0500

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