[#14696] Inconsistency in rescuability of "return" — Charles Oliver Nutter <charles.nutter@...>

Why can you not rescue return, break, etc when they are within

21 messages 2008/01/02
[#14699] Re: Inconsistency in rescuability of "return" — Gary Wright <gwtmp01@...> 2008/01/02

[#14738] Enumerable#zip Needs Love — James Gray <james@...>

The community has been building a Ruby 1.9 compatibility tip list on

15 messages 2008/01/03
[#14755] Re: Enumerable#zip Needs Love — Martin Duerst <duerst@...> 2008/01/04

Hello James,

[#14772] Manual Memory Management — Pramukta Kumar <prak@...>

I was thinking it would be nice to be able to free large objects at

36 messages 2008/01/04
[#14788] Re: Manual Memory Management — Marcin Raczkowski <mailing.mr@...> 2008/01/05

I would only like to add that RMgick for example provides free method to

[#14824] Re: Manual Memory Management — MenTaLguY <mental@...> 2008/01/07

On Sat, 5 Jan 2008 15:49:30 +0900, Marcin Raczkowski <mailing.mr@gmail.com> wrote:

[#14825] Re: Manual Memory Management — "Evan Weaver" <evan@...> 2008/01/07

Python supports 'del reference', which decrements the reference

[#14838] Re: Manual Memory Management — Marcin Raczkowski <mailing.mr@...> 2008/01/08

Evan Weaver wrote:

[#14911] Draft of some pages about encoding in Ruby 1.9 — Dave Thomas <dave@...>

Folks:

24 messages 2008/01/10

[#14976] nil encoding as synonym for binary encoding — David Flanagan <david@...>

The following just appeared in the ChangeLog

37 messages 2008/01/11
[#14977] Re: nil encoding as synonym for binary encoding — Yukihiro Matsumoto <matz@...> 2008/01/11

Hi,

[#14978] Re: nil encoding as synonym for binary encoding — Dave Thomas <dave@...> 2008/01/11

[#14979] Re: nil encoding as synonym for binary encoding — David Flanagan <david@...> 2008/01/11

Dave Thomas wrote:

[#14993] Re: nil encoding as synonym for binary encoding — Dave Thomas <dave@...> 2008/01/11

[#14980] Re: nil encoding as synonym for binary encoding — Gary Wright <gwtmp01@...> 2008/01/11

[#14981] Re: nil encoding as synonym for binary encoding — Yukihiro Matsumoto <matz@...> 2008/01/11

Hi,

[#14995] Re: nil encoding as synonym for binary encoding — David Flanagan <david@...> 2008/01/11

Yukihiro Matsumoto writes:

[#15050] how to "borrow" the RDoc::RubyParser and HTMLGenerator — Phlip <phlip2005@...>

Core Rubies:

17 messages 2008/01/13
[#15060] Re: how to "borrow" the RDoc::RubyParser and HTMLGenerator — Eric Hodel <drbrain@...7.net> 2008/01/14

On Jan 13, 2008, at 08:54 AM, Phlip wrote:

[#15062] Re: how to "borrow" the RDoc::RubyParser and HTMLGenerator — Phlip <phlip2005@...> 2008/01/14

Eric Hodel wrote:

[#15073] Re: how to "borrow" the RDoc::RubyParser and HTMLGenerator — Eric Hodel <drbrain@...7.net> 2008/01/14

On Jan 13, 2008, at 20:35 PM, Phlip wrote:

[#15185] Friendlier methods to compare two Time objects — "Jim Cropcho" <jim.cropcho@...>

Hello,

10 messages 2008/01/22

[#15194] Can large scale projects be successful implemented around a dynamic programming language? — Jordi <mumismo@...>

A good article I have found (may have been linked by slashdot, don't know)

8 messages 2008/01/24

[#15248] Symbol#empty? ? — "David A. Black" <dblack@...>

Hi --

24 messages 2008/01/28
[#15250] Re: Symbol#empty? ? — Yukihiro Matsumoto <matz@...> 2008/01/28

Hi,

Re: BasicObject.instance_eval

From: "Brian Mitchell" <binary42@...>
Date: 2008-01-04 04:32:18 UTC
List: ruby-core #14750
On Jan 3, 2008 10:06 PM, Sam Ruby <rubys@intertwingly.net> wrote:
> I'm looking at converting some code over from BlankSlate to BasicObject,
> but hit a roadblock: I can't figure out any way to do the equivalent of
>
> class Foo < BlankSlate
>    def initialize
>      @secret = 99
>    end
> end
>
> foo = Foo.new
> foo.instance_eval {@secret}
>
> Any suggestions?

Interesting situation. Part of me would want Ruby to allow something like:

  # Doesn't work obviously...
  Object.instance_method(:instance_eval).bind(foo).call {@secret}

On the other hand, it isn't hard to write a method that can be used to
extract information w/o dirtying the interface:

  class << BasicObject
    def accessor_for(name)
      @accessors_for ||= {}
      unless @accessors_for[name]
        tmp = "__tmp#{Thread.current.object_id}__"
        class_eval %[
          def #{tmp}
            #{name}
          end
        ]
        accessors_for[name] = instance_method(tmp)
        undef_method(tmp)
      end
      lambda {|obj| @accessors_for[name].bind(obj).call}
    end
  end

Now you can use:

  BasicObject.accessor_for('@test').call(foo)

Not perfect (I really don't like using class_eval + undef_method like
that), but it does work and it does avoid making a complete mess of
the namespace with __ methods. Maybe an alternative that Ruby 1.9
could provide would be a few useful methods like instance_eval
available as unbound methods via the class:

  # No need to force Object instance methods to work on BasicObject
  # if there are a few special cases made via the class.
  BasicObject.unbound_instance_eval.bind(foo).call {@secret}

Brian.

In This Thread