WorldBank

	require 'world_bank'

  WorldBank::Source.all.fetch       # =>  ['Doing Business', 'Something Else'...]
                                    #        array of 16 sources of information the bank used

  WorldBank::IncomeLevel..all.fetch # =>  { HIC: 'High Income', HPC: 'Heavily Indebted Poor Countries (HIPC)'...}
                                    #       hash of 9 income levels the bank assigns

  WorldBank::LendingType.all.fetch  # =>  [ { id: 'IBD', value: 'IBRD' }... ] an array of key: value pairs of
                                    #        the 4 lending types

  WorldBank::Topic.all.fetch        # =>  the 18 high level topics that indicators are grouped into

  WorldBank::Region.all.fetch       # =>  returns all the regions the World Bank can classify a country as

  WorldBank::Country.all.fetch      # =>  returns all countries the World Bank tracks

  WorldBank::Indicator.all.fetch    # =>  returns all the indicators the World Bank uses

  WorldBank::Indicator.featured     # =>  returns the featured indicators

  WorldBank::Topic.all.fetch        # =>  returns all the topics the World Bank catagorizes its indicators into


include WorldBank
  #
  # Topics
  #
  @environment = Topic.find(6).fetch
  @environment.id                 # =>  6
  @environment.name               # =>  'Environment'
  @environment.note               # =>  'Natural and man-made environmental resources – fresh...'

  #
  # Countries
  #
  @brazil = Country.find('br').fetch
  @brazil = Country.find('bra').fetch
  @brazil.name                    # =>  'Brazil'
  #
  # note: only low and middle income countries are classified by region...
  #
  @brazil.region                  # =>  <WorldBank::Region @name="Latin America & Caribbean (all income levels)" ....>
  @brazil.capital                 # =>  'Brasilia'
  @brazil.lending_type            # => <WorldBank::LendingType>

  #
  # Indicators
  #
  @tractors = Indicator.find('AG.AGR.TRAC.NO').fetch
  @tractors.id                    # =>  'AG.AGR.TRAC.NO'
  @tractors.name                  # =>  'Agricultural Machinery, tractors'
  @tractors.source                # =>  { id: 2, value: 'World Development Indicators' }

  #
  # Data
  #
  @results = WorldBank::Data.country('brazil').indicator('NY.GDP.MKTP.CD').dates('2000:2008').fetch
  # returns an array of WorldBank::Data objects that correspond to
  # Brazil's Yearly Gross Domestic Product as MarKeT Prices in Current U.S.
  # Dollars from 2000 to 2008

  puts @results.first.name
  @results.each {|d| puts d.date + ': $' + d.value }
  #    =>
  #  GDP (current US$)
  #  2008: $1652632229227.61
  #  2007: $1365982651542.37
  #  2006: $1088917279411.76
  #  2005: $882185291700.904
  #  2004: $663760000000
  #  2003: $552469288267.793
  #  2002: $504221228974.035
  #  2001: $553582178386.192
  #  2000: $644701831101.394
  #
  #  The WorldBank::Data can have have methods matching any of the World Bank API's
  # modifiers (like #dates above) called as class methods or chained in a query.
  #