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

CSV is smart enough to deal with the non-uniform hashes for you. See the code for CSV::Writer#<<

So, this works, and is a bit simpler than the above examples:

CSV.open("data.csv", "wb", {headers: @data.first.keys} ) do |csv|
  @data.each do |hash|
    csv << hash
  end
end