flip_flop.rb

require 'nokogiri'
require 'open-uri'

paragraphs = Nokogiri( open('http://en.wikipedia.org/wiki/Ruby_(programming_language)') )/'p'

# Print fromt the first paragraphs containing 'Google Tech Talk' to the first following paragraph containing 'mixins'

paragraphs.map(&:text).each do |p|
  puts p if (p =~ /Google tech talk/i)..(p =~ /mixins/i)
end


# >> At a Google Tech Talk in 2008 Matsumoto further stated, "I hope to see Ruby help every programmer in the world to be productive, and to enjoy programming, and to be happy. That is the primary purpose of Ruby language."[13]
# >> The name "Ruby" originated during an online chat session between Matsumoto and Keiju Ishitsuka on February 24, 1993, before any code had been written for the language.[14] Initially two names were proposed: "Coral" and "Ruby". Matsumoto chose the latter in a later email to Ishitsuka.[15] Matsumoto later noted a factor in choosing the name "Ruby" - it was the birthstone of one of his colleagues.[16][17]
# >> The first public release of Ruby 0.95 was announced on Japanese domestic newsgroups on December 21, 1995.[18][19] Subsequently three more versions of Ruby were released in two days.[14] The release coincided with the launch of the Japanese-language ruby-list mailing list, which was the first mailing list for the new language.
# >> Already present at this stage of development were many of the features familiar in later releases of Ruby, including object-oriented design, classes with inheritance, mixins, iterators, closures, exception handling and garbage collection.[20]