4-task.rb

require 'csv'
require 'ostruct'
require 'date'

arr = CSV.open("movies1.txt", {:col_sep => "|"}).map{|row| OpenStruct.new(:link => row[0], :title => row[1], :year => row[2], :country => row[3], :date => row[4], :genre => row[5], :duration => row[6], :rating => row[7], :director => row[8], :actors => row[9])}

arr.max_by(5){|i| i.duration.to_i}.each{|i| p i.title}
arr.select{|i| i.genre.include?("Comedy")}.each{|i| p i.title}[0..9]
arr.map{|m| m.director}.uniq.sort_by{|dir| dir.split(" ").last}.each{|dir| p dir}
p arr.count{|m| m.country != "USA"}

dates = arr.each do |i|
  if i.date.length < 10
    i.date << '-01'
  end
end

dates_updated = dates.map{|d| Date.parse(d.date)}
dates_updates_sorted = dates_updated.sort_by{|i| i.mon}.each{|i| i}
hash_sorted = {}
dates_updates_sorted.each do |i|
  hash_sorted[i.mon] = arr.select{|d| d.date.eql?(i.to_s)}
end
hash_sorted.each_key do |m|
  p "In #{Date::MONTHNAMES[m]} these movies have been released - #{hash_sorted[m][0].title}"
end