[#55853] ruby 1.9.3 p448 breaks ABI — V咜 Ondruch <v.ondruch@...>

Hi,

13 messages 2013/07/08

[#55951] [ruby-trunk - Bug #8625][Open] IO#read(len, buf) shortens buf even if data is not read actually — "no6v (Nobuhiro IMAI)" <nov@...>

10 messages 2013/07/11

[#55976] [ruby-trunk - Feature #8629][Open] Method#parameters should include the default value — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

13 messages 2013/07/12

[#55985] [ruby-trunk - Feature #8631][Open] Add a new method to ERB to allow assigning the local variables from a hash — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

19 messages 2013/07/12

[#56004] [ruby-trunk - Feature #8636][Open] Documentation hosting on ruby-lang.org — "zzak (Zachary Scott)" <e@...>

18 messages 2013/07/15

[#56019] [ruby-trunk - Feature #8639][Open] Add Queue#each — "avdi (Avdi Grimm)" <avdi@...>

15 messages 2013/07/15

[#56027] [CommonRuby - Feature #8640][Open] Add Time#elapsed to return nanoseconds since creation — "tenderlovemaking (Aaron Patterson)" <aaron@...>

24 messages 2013/07/15

[#56041] [CommonRuby - Feature #8643][Open] Add Binding.from_hash — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

26 messages 2013/07/16

[#56087] [ruby-trunk - Feature #8658][Open] Process.clock_gettime — "akr (Akira Tanaka)" <akr@...>

23 messages 2013/07/19

[#56096] [CommonRuby - Feature #8661][Open] Add option to print backstrace in reverse order(stack frames first & error last) — "gary4gar (Gaurish Sharma)" <gary4gar@...>

18 messages 2013/07/20

[#56193] [ruby-trunk - Bug #8693][Open] lambda invoked by yield acts as a proc with respect to return — "rits (First Last)" <redmine@...>

33 messages 2013/07/26

[#56274] [ruby-trunk - Bug #8709][Open] Dir.glob should return sorted file list — "tommorris (Tom Morris)" <tom@...>

19 messages 2013/07/30

[ruby-core:56260] Re: [ruby-trunk - Feature #8629] Method#parameters should include the default value

From: Rodrigo Rosenfeld Rosas <rr.rosas@...>
Date: 2013-07-29 14:46:51 UTC
List: ruby-core #56260
Hi Akira, thanks for your valuable input.

While your gem action_args is indeed interesting, it's not quite what 
I'm looking for since it will only bind the params to argument variables 
but won't perform any type conversion from string, which is what I'm 
mostly interested in.

With regards to your slide, I've seen some crazy implementations in the 
past (as used by Merb) to try to get the default values or the arguments 
as well. I mean, it's definitely easier with Ruby 2.0.0, but still looks 
like a bit of Voodoo. That's why I created this ticket so that we 
wouldn't need those complicated implementation attempts just to get 
access to the default values for the arguments.

It would be much easier if we had an easier way to get access to the 
default values (using both the new hash-like syntax or the old one) even 
if it's not possible to get the default value in some cases...

Cheers,
Rodrigo.

Em 29-07-2013 11:21, Akira Matsuda escreveu:
> Rodrigo,
>
> Here's my implementation of "params bindings to propose to the Rails 
> web framework", which might interest you. 
> https://github.com/asakusarb/action_args/blob/master/lib/action_args/params_handler.rb
> Also, here's the craziest example of "other approaches", which might 
> just entertain you (I mean, you might not want to use it in your 
> actual code). 
> https://speakerdeck.com/a_matsuda/ruby-2-dot-0-on-rails-in-production?slide=64
> HTH
>
>
> On Mon, Jul 29, 2013 at 9:50 PM, rosenfeld (Rodrigo Rosenfeld Rosas) 
> <rr.rosas@gmail.com <mailto:rr.rosas@gmail.com>> wrote:
>
>
>     Issue #8629 has been updated by rosenfeld (Rodrigo Rosenfeld Rosas).
>
>
>     Ok, thanks for considering. I'll try to think in other approaches
>     to deal with params bindings to propose to the Rails web
>     framework, but that won't be as elegant as having the binding
>     rules extracted directly from the default values (since in those
>     cases the default values wouldn't be a proc if the users read the
>     documentation).
>     ----------------------------------------
>     Feature #8629: Method#parameters should include the default value
>     https://bugs.ruby-lang.org/issues/8629#change-40750
>
>     Author: rosenfeld (Rodrigo Rosenfeld Rosas)
>     Status: Rejected
>     Priority: Normal
>     Assignee: matz (Yukihiro Matsumoto)
>     Category: core
>     Target version:
>
>
>     def a_method arg1=1, now = Time.now, arg2 = arg1 + 1
>     end
>
>     method(:a_method).parameters == [[:opt, :arg1], [:opt, :now],
>     [:opt, :arg2]]
>
>     I'd prefer if it could return [[:opt, :arg1, 1], [:opt, :now,
>     now_proc], [:opt, :arg2, arg2_proc]], and expect now_proc[] to be
>     the current time and arg2_proc[] to raise an exception since arg1
>     is not defined.
>
>     Rationale:
>
>     Ruby doesn't support optional typing such as:
>
>     def a_method Date date, Integer n = 0, String name = ''
>     end
>
>     Groovy does, and this allows Grails to perform some interesting
>     stuff, like params binding in controller methods.
>
>     If Ruby allowed the default values to be introspected, web
>     frameworks would be able to achieve a similar binding feature. For
>     example, they could use the default to decide upon how to bind the
>     param. They could use the default_value.class or if the default
>     value is nil it could be specified by providing the class itself.
>     For instance:
>
>     def an_action name: '', parent_name: String, age: Integer, date:
>     Date.today
>     end
>
>     Of course, you'd need to set up the framework so that it knows how
>     you intend parse dates and other special types from string, but
>     this could make the developer life easier and safer against this
>     kind of attack (like trying to instantiate a hash, etc).
>
>     An alternative would be something like:
>
>     def an_action params = {name: :string, age: :integer, date: :date}
>     end
>
>     You get the idea. Many APIs would be possible to be built if we're
>     able to easily get access to the default values when inspecting a
>     method.
>
>     Could you please consider this idea?
>
>
>     --
>     http://bugs.ruby-lang.org/
>
>
>
>
> -- 
> Akira Matsuda<ronnie@dio.jp <mailto:ronnie@dio.jp>>

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