Deal with numbers that contain commas

[ihough]

Currently if a csv contains "1,605.33` this is imported as 1

[seamusabshere]

@ihough i suggest adding (you need all the funky array stuff in order to memoize false)

def number_column?
  return @number_column_query[0] if @number_column_query.is_a?(Array)
  @number_column_query = [model.columns_hash[name.to_s].number?]
  @number_column_query[0]
end

then

if number_column?
  period_position = value.rindex '.'
  comma_position = value.rindex ','
  if period_position and comma_position and comma_position > period_position
    # uncommon euro style 1.000.000,53
    value = value.delete('.').gsub(',', '.')
  elsif comma_position
    # more common 4,000[.00] style - still don't want the commas
    value = value.delete(',')
  end
end