From: Ara.T.Howard@...
Date: 2004-10-12T00:14:44+09:00
Subject: Re: string replacement

On Mon, 11 Oct 2004, J.Lang wrote:

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> we need to replace a  whitespace with a <br> if the string is longer
> then 30 chars (next whitespace after 30 chars)

all whitespace after 30 chars, or every whitespace after 30 chars?

   eg.  if

     s = '... foo bar 42 '
             ^
             ^
             30

   do you want

     s = '...<br>foo<br>bar<br>42<br>'

   or

     s = '...<br>foo bar 42 '


are you trying to create a string buffer that will wrap after 30 chars?

if so maybe something like this.

harp:~ > cat a.rb
def brwrap buf, opts = {'width' => 30}
   width = Integer opts['width']
   wrapped = ['']
   buf.scan(%r/\S+/) do |token|
     line = wrapped.last
     unless line.size + token.size + 1 < width
       line << "<br>\n"
       wrapped << ''
       line = wrapped.last
     end
     line << ' ' << token
   end
   wrapped.join
end

buf = <<-txt
one two three four five six seven
eight nine ten eleven twelve thirteen
fourteen fifteen sixteen seventeen eightteen
txt

puts(brwrap(buf))

harp:~ > ruby a.rb
  one two three four five six<br>
  seven eight nine ten eleven<br>
  twelve thirteen fourteen<br>
  fifteen sixteen seventeen<br>
  eightteen



of course anything like this will fail if the buffer contains lines which have
no spaces AND are more than 30 chars long!

regards.

-a
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