From: Benoit Daloze <eregontp@...>
Date: 2010-01-27T04:41:57+09:00
Subject: Re: Find the parameters of each method in a class

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>:
> You can find the arity of said methods, but afaik not the names of the
> parameters:
>
> CoolClass.instance_method(:method_one).arity # => 2
> CoolClass.instance_method(:method_two).arity # => 3
>
> Jason
>
> On Tue, Jan 26, 2010 at 1:51 PM, Chris Gunnels <rfsllc@gmail.com> wrote:
>
>> Is there a way to find the parameters of each method in a class? For
>> instance I have a class like:
>>
>> class CoolClass
>>  def meth_one(p1,p2)
>>  ...
>>  end
>>
>>  def meth_two(p1,p2,p3)
>>  ...
>>  end
>> end
>>
>> I can run:
>> cc = CoolClass.new
>> cc.public_methods(false)
>>
>> and it will return an array of all the public methods
>> (['meth_one','meth_two']).
>>
>> Is there a way to find the parameters of each method from the example
>> above?
>> --
>> Posted via http://www.ruby-forum.com/.
>>
>>
>