From: Ryan Davis <ryand-ruby@...>
Date: 2010-01-27T07:25:02+09:00
Subject: Re: Find the parameters of each method in a class


On Jan 26, 2010, at 13:30 , Chris Gunnels wrote:

> Benoit Daloze wrote:
>> In Ruby 1.9.2:
>> 
>> irb(main):001:0> class C
>> irb(main):002:1> def meth(a,bb, ccc = nil, &b)
>> irb(main):003:2> end
>> irb(main):004:1> end
>> => nil
>> irb(main):005:0> C.instance_method(:meth).parameters
>> => [[:req, :a], [:req, :bb], [:opt, :ccc], [:block, :b]]
>> 
>> But you will not get the names for C methods like String#tr, just the
>> type of the parameters.
>> 
>> 2010/1/26 Jason Roelofs <jameskilton@gmail.com>:
> 
> Dang thats awesome and exactly what I need! Why can't it be in 1.8? :(

It can. Look at merb. I think it is in merb-param-protection. Much more hacky, but it works.