Как избежать печати вывода дважды

Question

Я написал следующий код для чтения из файла и распечатки вывода в терминале. Я получаю вывод, но вместо того, чтобы распечатать его один раз, например:

Crackling Rose

sounds/01-Cracklin-rose.wav

Soolaimon

sounds/06-Soolaimon.wav

Sweet Caroline

sounds/20-Sweet_Caroline.wav 

Я получаю результат дважды, например:

Crackling Rose

sounds/01-Cracklin-rose.wav

Soolaimon

sounds/06-Soolaimon.wav

Sweet Caroline

sounds/20-Sweet_Caroline.wav

Crackling Rose

sounds/01-Cracklin-rose.wav

Soolaimon

sounds/06-Soolaimon.wav

Sweet Caroline

sounds/20-Sweet_Caroline.wav

Есть идеи, почему это может быть?

Это мой код:

class Track
    attr_accessor :name, :location

    def initialize (name, location)
        @name = name
        @location = location
    end
end

# Returns an array of tracks read from the given file
def read_tracks(a_file)

  count = a_file.gets().to_i()
  i=0
  tracks = Array.new()
  while (i<count)
    track = read_track(a_file)
    tracks << track
    i+=1
  end 

  return tracks
end

# reads in a single track from the given file.
def read_track(a_file)
  track_name=a_file.gets.chomp
  track_location = a_file.gets.chomp
  track = Track.new(track_name, track_location)
  track.name= track_name
  track.location= track_location
  return track

end

# Takes an array of tracks and prints them to the terminal
def print_tracks(tracks)
  index = 0
  while (index<tracks.length)
    print_track tracks[index]
      index+=1
    end 
end

# Takes a single track and prints it to the terminal
def print_track(track)
    puts(track.name)
    puts(track.location)
end

# Open the file and read in the tracks then print them
def main()
  a_file = File.new("input.txt", "r") # open for reading
  tracks=read_tracks(a_file)
  print_tracks(tracks)
  # Print all the tracks
  print_tracks(tracks)
end

main()

Answer 1

Сначала вы вызываете print_tracks(tracks) дважды в main() методе

Answer 2

Здесь вы дважды звоните print_tracks()

# Open the file and read in the tracks then print them
def main()
  a_file = File.new("input.txt", "r") # open for reading
  tracks=read_tracks(a_file)
  print_tracks(tracks)
  # Print all the tracks
  print_tracks(tracks)
end