遍历一个目录中的每个文件 [英] Iterate through every file in one directory

问题描述

如何在 ruby​​ 中编写一个循环，以便我可以对每个文件执行一段代码?

How do I write a loop in ruby so that I can execute a block of code on each file?

我是 ruby​​ 的新手，我得出的结论是，这样做的方法是一个 do each 循环.
ruby 文件将从与我要循环的目录不同的目录中执行.

I'm new to ruby, and I've concluded that the way to do this is a do each loop.
The ruby file will be executed from a different directory than the directory I want to loop through.

我已经尝试了 Dir.foreach 但我无法让它工作.

I've tried the Dir.foreach and I couldn't get it to work.

推荐答案

正如其他人所说，Dir::foreach 在这里是一个不错的选择.但是，请注意 Dir::foreach 和 Dir::entries 将始终包括 . 和 ..(当前和父目录).您通常不想处理它们，因此您可以使用 目录::each_child 或 目录::children(如 ma11hew28 建议)或执行以下操作:

As others have said, Dir::foreach is a good option here. However, note that Dir::foreach and Dir::entries will always include . and .. (the current and parent directories). You will generally not want to work on them, so you can use Dir::each_child or Dir::children (as suggested by ma11hew28) or do something like this:

Dir.foreach('/path/to/dir') do |filename|
  next if filename == '.' or filename == '..'
  # Do work on the remaining files & directories
end

Dir::foreach 和 Dir::entries(以及 Dir::each_child 和 Dir::children) 还包括隐藏文件 &目录.通常这就是您想要的，但如果不是，您需要做一些事情来跳过它们.

Dir::foreach and Dir::entries (as well as Dir::each_child and Dir::children) also include hidden files & directories. Often this is what you want, but if it isn't, you need to do something to skip over them.

或者，您可能需要查看 Dir::glob 提供简单的通配符匹配:

Alternatively, you might want to look into Dir::glob which provides simple wildcard matching:

Dir.glob('/path/to/dir/*.rb') do |rb_filename|
  # Do work on files & directories ending in .rb
end

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