From: Alan Johnson <alan.wayne.johnson@...>
Date: 2008-11-19T09:37:30+09:00
Subject: Re: ruby global regex question.

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On Tue, Nov 18, 2008 at 4:06 PM, knohr <just_a_techie200x@yahoo.com> wrote:

> For the life of me, i can't figure out a ruby equivalent to perl's /g
>
> basically, i want to do the following
>
>
> while htmlSource=~m/<table>(.*?)<\table>/g do
>   tableSource=$1
>   tableSource=~m/Index (\d+)/
>   indexNumber=$1
>
>   while tableSource=~m/<tr>(.*?)<\/tr>/g do
>      tableRowSource=$1
>      doSomethingWith(tableRowSource, indexNumber)
>   end#while tableSource
>
> end#while htmlSource
>
>
> I will actually need to pull multiple vars, not just a single one,
> from the regex
> I will need to do the outer loop an unknown amount of times per
> document (0-20) and i will need to loop the inner an unknown amount of
> times (0-29)
>
>
> Thread safe would be a plus.
>
>
> any suggestions?
>
>
I think this does what you want, although I don't think gsub was really made
for this purpose.

def doSomethingWith(s)
    print s, "\n"
end

htmlSource =  '<table><tr>1,1</tr><tr>1,2</tr></table>'
htmlSource << '<table><tr>2,1</tr><tr>1,2</tr></table>'

htmlSource.gsub(/<table>(.*?)<\/table>/) do |t|
    tableRowSource = $1
    tableRowSource.gsub(/<tr>(.*?)<\/tr>/) do |r|
        doSomethingWith $1
    end
end

-- 
Alan

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