lib/sycsvpro/filter.rb
def match_boolean_filter?(values=[])
      return false if boolean_filter.empty? or values.empty?
      expression = boolean_filter
      columns = expression.scan(/(([nsd])(\d+))([<!=~>]{1,2})(.*?)(?:[\|&]{2}|$)/)
      columns.each do |c|
        value = case c[1]
        when 'n'
          values[c[2].to_i].empty? ? '0' : values[c[2].to_i]
        when 's'
          "\"#{values[c[2].to_i]}\""
        when 'd'
          begin
            Date.strptime(values[c[2].to_i], date_format)
          rescue Exception => e
            case c[3]
            when '<', '<=', '=='
              "#{c[4]}+1"
            when '>', '>='
              '0'
            when '!='
              c[4]
            end
          else
            "Date.strptime('#{values[c[2].to_i]}', '#{date_format}')"
          end 
        end
        expression = expression.gsub(c[0], value)
      end
      eval(expression)
    end
def match_boolean_filter?(values=[])
      return false if boolean_filter.empty? or values.empty?
      expression = boolean_filter
      columns = expression.scan(/(([nsd])(\d+))([<!=~>]{1,2})(.*?)(?:[\|&]{2}|$)/)
      columns.each do |c|
        value = case c[1]
        when 'n'
          values[c[2].to_i].empty? ? '0' : values[c[2].to_i]
        when 's'
          "\"#{values[c[2].to_i]}\""
        when 'd'
          begin
            Date.strptime(values[c[2].to_i], date_format)
          rescue Exception => e
            case c[3]
            when '<', '<=', '=='
              "#{c[4]}+1"
            when '>', '>='
              '0'
            when '!='
              c[4]
            end
          else
            "Date.strptime('#{values[c[2].to_i]}', '#{date_format}')"
          end 
        end
        expression = expression.gsub(c[0], value)
      end
      eval(expression)
    end
Checks whether the values match the boolean filter