如何在输出中换行

Question

如何\n在输出中实际工作？目前它只是在一个长块中写入它.谢谢你的帮助

Dir.chdir 'C:/Users/name/Music'
music = Dir['C:/Users/name/Music/*.{mp3, MP3}']
puts 'what would you like to call the playlist?'
@new = ''
playlist_name = gets.chomp + '.m3u'

music.each do |z|
  @new += z + '\n'
end

File.open playlist_name, 'w' do |f|
  f.write @new
end

Answer 1

用"\n"而不是'\n'

Answer 2

您可以在File.open块中完成所有操作:

Dir.chdir 'C:/Users/name/Music'
music = Dir['C:/Users/name/Music/*.{mp3, MP3}']
puts 'what would you like to call the playlist?'
playlist_name = gets.chomp + '.m3u'

File.open playlist_name, 'w' do |f|
  music.each do |z|
    f.puts z
  end
end

Answer 3

我想与\n
我分享我的经验，我注意到“\n”的作用是-

puts "\n\n" // to provide 2 new lines

但不是

p "\n\n"

也把'\n\n'
不起作用。

希望对你有用！！

Answer 4

其实你甚至不需要块:

  Dir.chdir 'C:/Users/name/Music'
  music = Dir['C:/Users/name/Music/*.{mp3, MP3}']
  puts 'what would you like to call the playlist?'
  playlist_name = gets.chomp + '.m3u'

  File.open(playlist_name, 'w').puts(music)