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Re: String.gsub with regex and block

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Brian Candler wrote in post #991490:
> 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
>

And if you want to avoid writing code in perl:

str = "John Smith"
pattern = /(.+)\s(.+)/

result = str.gsub(pattern) do
  md_obj = Regexp.last_match
  first_name, last_name = md_obj[1], md_obj[2]

  p first_name, last_name
end

Or to avoid any indexing, you could do this:

str = "John Smith"
pattern = /(.+)\s(.+)/

result = str.gsub(pattern) do |match|
  first_name, last_name = match.split
  p first_name, last_name

  "some replacement"
end

puts result

--output:--
"John"
"Smith"
some replacement

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

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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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