Question

Say I have a CSV file that has | as a delimiter. I know how to read and print the content but I’m not sure how to go about printing Row 7 has an empty field. It would be nice to show which field it is but my concern right now is to show me the row first and I can try to do the second task.

require 'csv'
require 'pp'

CSV.open("exam.txt", 'r',"|") do |row|
  pp row
end

Answer 1

require 'csv'
require 'pp'

i = 0
CSV.open("exam.txt", 'r',"|") do |row|
  i += 1;
  pp row
  pp "Row " << i.to_s << " has an empty field" if row.include?(nil)
end

You can use something like row.index(nil) to find the nil field. Read the Enumerable and Array documentation, you’ll probably find something.