search query string parser, google-ish

parse_query.rb

# via http://jablan.radioni.ca/post/4982485974/parsing-search-query-in-ruby

def parse_query s
  s.scan(/((\S+)\:\s?)?([+-])?(("(.+?)")|(\S+))/).map{|match|
    Hash[
      [nil, :prefix, :plusminus, nil, nil, :phrase, :word].zip(match).select(&:all?)
    ]
  }
end

parse_query 'foo +bar -baz "dev pro talk" site:devprotalk.com category:cat1'

# => [
#      {:word=>"foo"},
#      {:plusminus=>"+", :word=>"bar"},
#      {:plusminus=>"-", :word=>"baz"},
#      {:phrase=>"dev pro talk"},
#      {:prefix=>"site", :word=>"devprotalk.com"},
#      {:prefix=>"category", :word=>"cat1"}
#    ]