collection.rb

class MovieCollection
  FIELDS = %i[link title year country premiere genre duration rank director cast]
  def initialize(filename)
    @file = filename
  end

  def all
    @@all = File.readlines(@file)
      .map { |line| FIELDS.zip(line.split("|")).to_h }
  end

  def sort_by_the(argument)
    @argument = argument.to_s
    @sorted_collection = @@all.sort_by { |movie| movie[@argument].to_i }
    puts @sorted_collection
  end
end