How to write columns header to a csv file with Ruby?

Question

I am having trouble writing columns to a csv file with Ruby. Below is my snippet of code.

 calc = numerator/denominator.to_f
 data_out = \"#{numerator}, #{de         


        

Answer 1

Best way to handle csv file is to use Ruby's CSV module.

I had same problem after reading CSV code I came across this solution which i find most efficient.

headers = ['col1','col2','col3']

CSV.open(file_path, 'a+', {force_quotes: true}) do |csv|
  csv << headers if csv.count.eql? 0 # csv.count method gives number of lines in file if zero insert headers
end