在文件

Question

我有以下代码，它挂起来将用户输入写入文件。我的错误是什么？

file=File.open("Debsfile.txt", "r+") do |file|
  file.puts "This is Deb's file. It's a great file. It has many characters, words and lines."
  file.puts "This is another line of text in Deb's file."
end
  puts "What is your favorite color?"
  color = gets
  color = color.chomp
  color.write
file.close

File.open("Debsfile.txt").readlines.each do |line|
  puts line
end

Answer 1

如果我以您的方式运行该程序，则错误消息为：未定义的方法`write＆＃39; for＆＃34; red＆＃34;：String（NoMethodError）问题是你在颜色上调用write方法，这是一个字符串对象。您实际上想要将输入颜色写入文件，因此，您需要在File（或IO对象）上调用write方法：file.write颜色如下所示： File.open（＆＃34; Debsfile.txt＆＃34;，＆＃34; r +＆＃34;）do | file | file.puts＆＃34;这是Deb的文件。这是一个很棒的文件。它有很多字符，单词和行。＆＃34; file.puts＆＃34;这是Deb的文件中的另一行文字。＆＃34; put＆＃34;你最喜欢的颜色是什么？＆＃34; color =得到 color = color.chomp file.write color＃在这里将颜色写入文件结束 File.open（＆＃34; Debsfile.txt＆＃34;）。readlines.each do | line | 放线结束有关如何在Ruby中写入文件的详细信息，请参阅此文章。

Answer 2

file=File.open("Debsfile.txt", "a+") do |file|

在文件

中添加两行文本

file.puts "This is Deb's file. It's a great file. It has many characters, words and lines."
file.puts "This is another line of text in Deb's file."
#asks user for favorite color in console
puts "What is your favorite color?"
#assigns color to variable "color"
color = gets
#color.chomp cuts of the new line character so that you just have the user input
color = color.chomp
#adds the color to the end of the file
file.puts("Your favorite color is #{color}.") #writing the color to the file

结束#end文件打开

File.open（＆＃34; Debsfile.txt＆＃34;）。readlines.each do | line | 放线端

Ruby，将用户输入写入文件

2 个答案:

在文件