如何在 Ruby 中创建文件 [英] How to create a file in Ruby

问题描述

我正在尝试创建一个新文件，但事情似乎也没有像我期望的那样工作.这是我尝试过的:

I'm trying to create a new file and things don't seem to be working as I expect them too. Here's what I've tried:

File.new "out.txt"
File.open "out.txt"
File.new "out.txt","w"
File.open "out.txt","w"

根据我在网上阅读的所有内容，所有这些都应该有效，但每一个都给了我这个:

According to everything I've read online all of those should work but every single one of them gives me this:

ERRNO::ENOENT: No such file or directory - out.txt

这发生在 IRB 和 Ruby 脚本中.我错过了什么?

This happens from IRB as well as a Ruby script. What am I missing?

推荐答案

使用:

File.open("out.txt", [your-option-string]) {|f| f.write("write your stuff here") }

您的选择:

• r - 只读.该文件必须存在.
• w - 创建一个空文件用于写入.
• a - 附加到文件.如果文件不存在，则创建该文件.
• r+ - 打开一个文件进行读写更新.该文件必须存在.
• w+ - 创建一个用于读写的空文件.
• a+ - 打开一个文件进行读取和追加.如果文件不存在，则创建该文件.

• r - Read only. The file must exist.
• w - Create an empty file for writing.
• a - Append to a file.The file is created if it does not exist.
• r+ - Open a file for update both reading and writing. The file must exist.
• w+ - Create an empty file for both reading and writing.
• a+ - Open a file for reading and appending. The file is created if it does not exist.

在您的情况下，'w' 更可取.

In your case, 'w' is preferable.

或者你可以:

out_file = File.new("out.txt", "w")
#...
out_file.puts("write your stuff here")
#...
out_file.close

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