任何ruby库来检查某些方法的参数是什么？ [英] Any ruby library to inspect what are the arguments that a certain methods take?

问题描述

是否有任何库可以检查并显示方法所采用的参数？

is there any library that can inspect and display what are the arguments that a method takes?

推荐答案

了解任何第三方库或甚至可以可靠地执行此操作的RubyGems。考虑到Ruby提供的有限反射设施，这种检查是不可能的。

I don't know of any third-party libraries or even RubyGems that can do this reliably. It just isn't possible to do this kind of inspection given the limited reflection facilities Ruby provides.

您必须完成核心库中可用的功能，这基本上是 方法＃参数 ：

You will have to make do with what is available in the core library, which is basically Method#parameters:

def foo(a, b=nil, *c, d, &e); end
method(:foo).parameters
  # => [[:req, :a], [:opt, :b], [:rest, :c], [:req, :d], [:block, :e]]

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