在 ruby​​ on rails 中遍历目录和读取文件 [英] Traversing directories and reading from files in ruby on rails

问题描述

我在弄清楚如何 1) 遍历目录和 2) 获取每个文件 (.txt) 并将其另存为字符串时遇到了一些麻烦.我显然对 ruby​​ 和 rails 都很陌生.

I'm having some trouble figuring out how to 1) traverse a directory and 2) taking each file (.txt) and saving it as a string. I'm obviously pretty new to both ruby and rails.

我知道我可以用 f=File.open("/path/*.txt") 保存文件，然后用 puts f.read 输出它但我宁愿将其保存为字符串，而不是 .txt，并且不知道如何为每个文件执行此操作.

I know that I could save the file with f=File.open("/path/*.txt") and then output it with puts f.read but I would rather save it as a string, not .txt, and dont know how to do this for each file.

谢谢！

推荐答案

Jake 的回答已经足够好了，但是 each_with_object 会使它稍微短一些.我也让它递归.

Jake's answer is good enough, but each_with_object will make it slightly shorter. I also made it recursive.

def read_dir dir
  Dir.glob("#{dir}/*").each_with_object({}) do |f, h|
    if File.file?(f)
      h[f] = open(f).read
    elsif File.directory?(f)
      h[f] = read_dir(f)
    end
  end
end

当目录是这样的:

--+ directory_a
  +----file_b
  +-+--directory_c
  | +-----file_d
  +----file_e

然后

read_dir(directory_a)

会回来:

{file_b => contents_of_file_b,
 directory_c => {file_d => contents_of_file_d},
 file_e => contents_of_file_e}

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