def parse(raw_data)
      raw_data['d'].each_with_object(sell: {}, buy: {}) do |obj, result|
        sell_rate = obj['SellRate']
        buy_rate  = obj['BuyRate']
        currency  = obj['CurrencyID'].to_sym

        result[:sell][currency] = sell_rate
        result[:buy][currency]  = buy_rate
      end
    end
def parse(raw_data)
      raw_data['d'].each_with_object(sell: {}, buy: {}) do |obj, result|
        sell_rate = obj['SellRate']
        buy_rate  = obj['BuyRate']
        currency  = obj['CurrencyID'].to_sym

        result[:sell][currency] = sell_rate
        result[:buy][currency]  = buy_rate
      end
    end
Parse the #raw_exchange_rates returned in response
 @param [Array] of the raw_data scraped
 @return [Hash] of exchange rates for selling and buying
   {
     { sell: { SYM: rate }, { SYM: rate }, ... },
     { buy:  { SYM: rate }, { SYM: rate }, ... }
   }