From: Li Chen <chen_li3@...>
Date: 2007-06-14T03:05:19+09:00
Subject: Re: why writing the file is partial


> He needs to seek back to the beginning of the line before he writes:
> 
>         file.each_line do |line|
>                if pat.match(line)
>                      line.gsub!(pat,sub)  #replace the line in place
>                      file.seek(-line.length, IO::SEEK_CUR)
>                      file.print line    #write/update the file
>                end
>         end
>      end
> 
> But this will only work in the case where the replacement is the same
> length at the original, if you you're either going to leave stuff
> behind, or will overwrite the next line.  In either case you're more
> likely to end up with gibberish than something you like.

What am I supposed to do if the replacement is not same size?

Thanks,

Li

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