将目录添加到$ LOAD_PATH（Ruby） [英] Adding a directory to $LOAD_PATH (Ruby)

问题描述

我见过两种常用的技术，用于将当前正在执行的文件的目录添加到$ LOAD_PATH（或$ :)。如果你不使用宝石，我会看到这样做的好处。其中一个看起来比另一个更详细，但是是否有理由与另一个进行比较？第一个详细方法（可能是过度杀伤）： / p>

  $ LOAD_PATH.unshift（File.expand_path（File.dirname（__ FILE__）））除非$ LOAD_PATH.include？（File.expand_path （File.dirname（__ FILE__）））
  

以及更直接，快速和肮脏：

  $ :. unshift File.dirname（__ FILE__）
  

有什么理由与其中一个去？

解决方案

我会说请在 $ :. unshift File.dirname（__ FILE __）之上使用另一个，因为我已经在代码中看到了比 $ LOAD_PATH 一个，它也短一些！

I have seen two commonly used techniques for adding the directory of the file currently being executed to the $LOAD_PATH (or $:). I see the advantages of doing this in case you're not working with a gem. One seems more verbose than the other, obviously, but is there a reason to go with one over the other?

The first, verbose method (could be overkill):

$LOAD_PATH.unshift(File.expand_path(File.dirname(__FILE__))) unless $LOAD_PATH.include?(File.expand_path(File.dirname(__FILE__)))

and the more straightforward, quick-and-dirty:

$:.unshift File.dirname(__FILE__)

Any reason to go with one over the other?

解决方案

I would say go with $:.unshift File.dirname(__FILE__) over the other one, simply because I've seen much more usage of it in code than the $LOAD_PATH one, and it's shorter too!

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