Convert non-breaking spaces to spaces in Ruby

Question

I have cases where user-entered data from an html textarea or input is sometimes sent with \\u00a0 (non-breaking spaces) instead of spaces when encoded as utf-8

Answer 1

Actual functioning IRB code examples that answer the question, with latest Rubies (May 2012)

Ruby 1.9

require 'rubygems'
require 'nokogiri'
RUBY_DESCRIPTION # => "ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]"
doc = '   '
page = Nokogiri::HTML(doc)
s = page.inner_text
s.each_codepoint {|c| print c, ' ' } #=> 32 160 32
s.strip.each_codepoint {|c| print c, ' ' } #=> 160
s.gsub(/\s+/,'').each_codepoint {|c| print c, ' ' } #=> 160
s.gsub(/\u00A0/,'').strip.empty? #true

Ruby 1.8

require 'rubygems'
require 'nokogiri'
RUBY_DESCRIPTION # => "ruby 1.8.7 (2012-02-08 patchlevel 358) [x86_64-linux]"
doc = '   '
page = Nokogiri::HTML(doc)
s = page.inner_text # " \302\240 "
s.gsub(/\s+/,'') # "\302\240"
s.gsub(/\302\240/,'').strip.empty? #true