convert array of hashes to csv file

Question

How do you convert an array of hashes to a .csv file?

I have tried

    CSV.open(\"data.csv\", \"wb\") do |csv|
      @data.to_csv
    end

Answer 1

If the hashes aren't uniform then you will end up with data in the wrong columns. You should use values_at instead:

CSV.open("data.csv", "wb") do |csv|
  keys = @data.first.keys
  csv << keys
  @data.each do |hash|
    csv << hash.values_at(*keys)
  end
end