From: Robert Klemme <bob.news@...>
Date: 2004-12-14T05:02:19+09:00
Subject: Re: Help writing a each_unique method


"trans. (T. Onoma)" <transami@runbox.com> schrieb im Newsbeitrag 
news:200412131056.58363.transami@runbox.com...
> On Monday 13 December 2004 10:37 am, Robert Klemme wrote:
> | What about
> |
> | class String
> |   def word_wrap!(n = 80)
> |     raise ArgumentError, "Wrap margin too low: #{n}" if n <= 2
> |     gsub!( Regexp.new( "(.{1,#{n-1}}\\w)\\b\\s*" ), "\\1\n")
> |   end
> |
> |   def word_wrap(n = 80)
> |     c = dup
> |     c.word_wrap! n
> |     c
> |   end
> | end
>
> Thanks, robert.

You're welcome.

> That's a nice basic approach, and for the lack of something
> better I think I will used. But it would be nice to have something a 
> little
> more robust. Something that can determine when to divide and hyphenate a 
> word
> if it is just too long.

Err, that plays in a whole different league...

> Like I said, mine is far from perfect but I'll show it anyway:
>
>  def word_wrap(max_width=nil, margin=6)
>    max_width ||= 80
>    max_width -= 1
>    min_width = max_width - margin
>    blocks = []; scan(/(.*)(\n\s+\n|\Z)/m){ blocks << $~ }
>    complete = ''
>    blocks.each{ |block|
>      str = ''; line = ''
>      body = block[1].gsub(/\s+/, ' ')
>      padding = block[2].to_s
>      words = body.split(/\s+/)
>      i = 0
>      words.each { |word|
>        line << word
>        while line.length > max_width
>          clean_break = line.index(/\s\S*?$/)
>          clean_break = 0 unless clean_break
>          if clean_break < min_width
>            remaining = line[max_width..-1]
>            str << line.slice(0,max_width)
>            str << '-' if /^[a-zA-Z0-9]/ =~ remaining
>            str << "\n"
>            line = line[max_width..-1]
>          else
>            str << line.slice(0,clean_break)
>            str << " \n"
>            line = line[(clean_break + 1)..-1]
>          end
>        end
>        line << ' '
>      }
>      str << line.chomp(' ')
>      complete << str << padding
>    }
>    complete << "\n"
>  end

Ah, you use a margin to determine min line length.  That makes things a bit 
more complicated of course. :-)

> I never realized how complex something seemingly so simple could be.

I guess, that's because of the complexity of our language (no, not Ruby).

Kind regards

    robert