在 IRB 中重新加载 ruby​​gem [英] Reload rubygem in IRB

问题描述

有没有办法重新加载"或刷新"内存中的 ruby​​gem?当我在 irb 中玩游戏时，偶尔我喜欢修改我的 gem 文件，如果我需要相同的 gem，它不会更新到内存中并给出false"输出.目前我必须退出 IRB，重新进入 IRB，然后再次需要 gem，必须有更好的方法......它是什么?

Is there a way to "reload" or "refresh" a rubygem in memory? As i'm playing in irb, occasionally I like to modify my gem files, and if i require the same gem, it does not update into memory and gives the output "false". Currently I have to exit IRB, get back into IRB and then require the gem again, there has to be a better way...what is it?

推荐答案

正如其他人所建议的，您可以使用 Kernel#load.但是，不要浪费时间查找和加载每个 gem 文件，因为所有需要的文件都存储在 $" 中.有了这些知识，这里有一个重新加载 irb 命令:

As others have suggested, you can use Kernel#load. However, don't waste your time finding and loading each gem file as all files that have been required are stored in $". Armed with this knowledge, here's a reload irb command:

 def reload(require_regex)
  $".grep(/^#{require_regex}/).each {|e| load(e) }
 end

例如，如果您在 irb 中使用 hirb gem，您只需重新加载:

For example, if you were using the hirb gem in irb, you would simply reload with:

>> reload 'hirb'

如果由于某种原因加载不起作用(它对文件扩展名比 require 更挑剔)，您可以通过首先删除它在 $" 中的条目来重新请求任何文件.有了这个建议，上面的命令将是:

If for whatever reason load doesn't work (it is pickier about file extensions than require is), you can re-require any file by first deleting its entry in $". With this advice the above command would be:

 def reload(require_regex)
   $".grep(/^#{require_regex}/).each {|e| $".delete(e) && require(e) }
 end

选择适合您的那个.就我个人而言，我使用后者.

Pick whichever works for you. Personally, I use the latter.

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