From: Singeo <singeo.sg@...>
Date: 2007-05-17T18:16:49+09:00
Subject: Re: Problem removing new line characters on Mac OS X

Apologies for the mis-understanding, I have been using backslashes.
Here's my code, as you'll see from the resulting file there are a
bunch of new line characters in the file I'd like to get rid of.
Thanks for the help so far.

require("rubygems")
require("scrubyt")
require ("open-uri")
require 'time'
require 'date'

psi = Scrubyt::Extractor.define do
  fetch("http://app.nea.gov.sg/psi/")

  record("/html/body/div/table/tr/td/table/tbody/tr/td/div",
{ :generalize => true }) do
    title("/strong[1]/font[1]")
    item("/table/tbody/tr/td/table/tbody/tr", { :generalize => true })
do
      region("/td[1]")
      psi("/td[7]")
      aqd("/td[8]")
    end
  end
end

f = open("psiregions.xml", File::CREAT|File::TRUNC|File::RDWR) {|f|
  psi.to_xml.write(f, 1)
}

# Create the RSS file.
 rssfile = File.new("sgpsi.xml", "w")
 rssfile.puts('<?xml version="1.0" encoding="UTF-8"?>')
 rssfile.puts('<rss version="2.0">')
 rssfile.puts('  <channel>')
 rssfile.puts('    <link>http://app.nea.gov.sg/psi/</link>')
 rssfile.puts('    <description>Singapore PSI Readings</description>')
 #rssfile.puts('    <title>Singapore PSI Readings' + Time.now.rfc2822
+ '</title>')
 rssfile.puts('    <lastBuildDate>' + Time.now.rfc2822 + '</
lastBuildDate>')
 rssfile.puts('    <webMaster>singeo@singeo.com.sg</webMaster>')

 File.open('psiregions.xml', 'r') do |f1|
    while line = f1.gets
    line=line.strip
    line=line.chomp
    line.gsub!(/[\n]/, "")
    line.gsub!(/<root>/, "")
    line.gsub!(/<\/root>/, "")
    line.gsub!(/<record>/, "")
    line.gsub!(/<\/record>/, "")
    line.gsub!("24-hr", "Singapore 24-hr")
    line.gsub!("<region>Region</region>", "")
    line.gsub!("<region>Sulphur Dioxide</region>", "")
    line.gsub!(/<region>/, "<title>")
    line.gsub!(/<\/region>/,":")
    line.gsub!(/<psi>/, " PSI Level ")
    line.gsub!(/<\/psi>/, "")
    line.gsub!(/<aqd>/, " - ")
    line.gsub!(/<\/aqd>/, "</title>")
    line.gsub!(/<item>/, "<item><pubDate>" + Time.now.rfc2822 + "</
pubDate>")
    rssfile.puts line
    end
 end


 rssfile.puts('</channel>')
 rssfile.puts('</rss>')
 rssfile.close


On May 17, 4:38 pm, Dan Zwell <dzw...@gmail.com> wrote:
> Singeo wrote:
> > Hi, I'm pretty new to Ruby. I've got a text file where I need to
> > remove some new line characters. I've tried everything I can think of
> > to do this with no success, including:
>
> > line.gsub!("/r","")
> > line.gsub!("/n","")
> > line=line.chomp
>
> > I can't seem to get the new line character to be recognised and dealt
> > with. Any advice appreciated.
>
> > Thanks
>
> It looks like you should be using backslashes. If you want to match both
> newlines and carriage returns, you can use:
>
> line.gsub!(/[\n\r]/, "")
>
> -Dan