[#385051] How to order Structs based on two fields — Iñaki Baz Castillo <ibc@...>

Hi, I've a struct like this:

20 messages 2011/07/01
[#385052] Re: How to order Structs based on two fields — Iñaki Baz Castillo <ibc@...> 2011/07/01

2011/7/1 I=C3=B1aki Baz Castillo <ibc@aliax.net>:

[#385057] Re: How to order Structs based on two fields — Robert Klemme <shortcutter@...> 2011/07/01

On Fri, Jul 1, 2011 at 12:55 PM, I=F1aki Baz Castillo <ibc@aliax.net> wrote=

[#385069] Offering Help — Joe Peric <peric.joe@...>

I'm new to Ruby and I am willing to learn. Anyone need help on a

18 messages 2011/07/01
[#385072] Re: Offering Help — Jeremy Heiler <jeremyheiler@...> 2011/07/01

On Fri, Jul 1, 2011 at 11:43 AM, Joe Peric <peric.joe@gmail.com> wrote:

[#385073] Re: Offering Help — Joe Peric <peric.joe@...> 2011/07/01

Never heard of it, but I'll get right on it. Thanks.

[#385082] Re: Offering Help — Joe Peric <peric.joe@...> 2011/07/02

Just finished this. I had to find some more info on exceptions to get

[#385083] Re: Offering Help — Jeremy Heiler <jeremyheiler@...> 2011/07/02

On Sat, Jul 2, 2011 at 1:39 PM, Joe Peric <peric.joe@gmail.com> wrote:

[#385102] symbol vs string for hash keys — Intransition <transfire@...>

What are the important factors to consider when deciding whether to

12 messages 2011/07/03

[#385160] Fatal Error with Ruby/GTK2, Homebrew, Green Shoes, and OSX Snow Leopard — Timothy Barnes <barnes7td@...>

I posted the below question to the Shoes mailing list and got back the

10 messages 2011/07/09

[#385194] RubyInstaller Extras — Jon <jon.forums@...>

Since 2009, we've been pleased to include Huw Collingbourne's The Book of Ruby with RubyInstaller. Well now, Huw has a newly updated version, and he's published it with No Starch Press.

11 messages 2011/07/12

[#385207] Creating a range of directories — Simon Harrison <simon@...>

I'm wanting to create a range of directories with a prefix, like the

13 messages 2011/07/13

[#385276] Is there a more efficient way to remove data from a string? — Eddie Catflap <catflaporama@...>

Hi

9 messages 2011/07/15

[#385297] Help needed for a new release of text-hyphen — Austin Ziegler <halostatue@...>

I've had folks asking me for a release of text-hyphen that works with

12 messages 2011/07/15

[#385326] Comparing hashes based on their keys — Stefano Mioli <stefano.mioli@...>

Hi list,

13 messages 2011/07/15

[#385342] moving a 1.8.6 install? — Roggie Boone <rogboone@...>

Is it possible to move the gems from a Ruby 1.8.6 install on an (old)

10 messages 2011/07/15

[#385410] Better name for #zip_with — Intransition <transfire@...>

Any ideas for a better name for:

13 messages 2011/07/18

[#385452] Ruby + USB + CCTV Camera Driver? — "Bob Carpenter." <rgc3679@...>

I want to write a Ruby driver that handles the feed from A CCTV camera.

23 messages 2011/07/18
[#385459] Re: Ruby + USB + CCTV Camera Driver? — William Rutiser <wruyahoo05@...> 2011/07/18

On 2011-07-18 1:00 PM, Bob Carpenter. wrote:

[#385461] Re: Ruby + USB + CCTV Camera Driver? — "Bob Carpenter." <rgc3679@...> 2011/07/18

William Rutiser wrote in post #1011466:

[#385462] Re: Ruby + USB + CCTV Camera Driver? — Hassan Schroeder <hassan.schroeder@...> 2011/07/18

On Mon, Jul 18, 2011 at 11:51 AM, Bob Carpenter. <rgc3679@yahoo.com> wrote:

[#385464] Re: Ruby + USB + CCTV Camera Driver? — "Bob Carpenter." <rgc3679@...> 2011/07/18

Hassan Schroeder wrote in post #1011472:

[#385471] Re: Ruby + USB + CCTV Camera Driver? — Hassan Schroeder <hassan.schroeder@...> 2011/07/18

On Mon, Jul 18, 2011 at 12:58 PM, Bob Carpenter. <rgc3679@yahoo.com> wrote:

[#385474] Re: Ruby + USB + CCTV Camera Driver? — Phillip Gawlowski <cmdjackryan@...> 2011/07/18

On Tue, Jul 19, 2011 at 12:18 AM, Hassan Schroeder

[#385477] Re: Ruby + USB + CCTV Camera Driver? — "Bob Carpenter." <rgc3679@...> 2011/07/19

Phillip Gawlowski wrote in post #1011503:

[#385509] A beginner question. — "Cajus A." <cajus_@...>

Hi i'm trying to write and example program where you speak to a

12 messages 2011/07/19

[#385542] Splitting strings — Ryan Mckenzie <ryan@...>

Hi all,

18 messages 2011/07/19

[#385565] error building ruby p290 — Dev Guy <devguy.ca@...>

I get the following build error on my Linux box while trying to build

12 messages 2011/07/20

[#385629] Are Job Ads OK? — Lee Hughes <lee@...>

Is it OK to post Ruby job ads on this forum?

12 messages 2011/07/21

[#385847] String manuplation example — kotin 76 <kotin76@...>

Hi,

15 messages 2011/07/27

[#385860] Counting lines of code in a ruby code file ignoring method code lines in the process — Harry Truax <htruax@...>

Hello,

8 messages 2011/07/27

[#385936] Help in Pointer — Tridib Bandopadhyay <tridib04@...>

Hello

18 messages 2011/07/29

[#386012] Ruby a "4th generation language"? Credible sources? — Albert Schlef <albertschlef@...>

I've noticed that Wikipedia says that "C#, Java" are 3'rd generation

13 messages 2011/07/31

[#386050] system stack error in ObjectSpace.each_object — luke gruber <luke.gru@...>

Hey guys, I'm just starting to mess around with metaprogramming in Ruby,

14 messages 2011/07/31
[#386052] Re: system stack error in ObjectSpace.each_object — Josh Cheek <josh.cheek@...> 2011/07/31

On Sun, Jul 31, 2011 at 4:29 PM, luke gruber <luke.gru@gmail.com> wrote:

[#386055] Re: system stack error in ObjectSpace.each_object — luke gruber <luke.gru@...> 2011/08/01

> Typically, SystemStackError is due to recursing for too long, perhaps I

[#386058] Re: system stack error in ObjectSpace.each_object — Robert Klemme <shortcutter@...> 2011/08/01

On Mon, Aug 1, 2011 at 3:56 AM, luke gruber <luke.gru@gmail.com> wrote:

Re: system stack error in ObjectSpace.each_object

From: Josh Cheek <josh.cheek@...>
Date: 2011-07-31 23:15:46 UTC
List: ruby-talk #386052
On Sun, Jul 31, 2011 at 4:29 PM, luke gruber <luke.gru@gmail.com> wrote:

> Hey guys, I'm just starting to mess around with metaprogramming in Ruby,
> so I was just having a bit of fun and trying to make a script that would
> allow for creating a 'leader' object in a class, and then when that
> object is sent a message, all other objects of some subordinate class
> would respond to the same message.
>
> So the script I wrote is here:
> https://github.com/luke-gru/lemmings/blob/master/leader.rb
>
> On line 52, I ran into this issue:
>
>  def get_other_objects(subord_class)
>    obj_ary = []
>    ObjectSpace.each_object(subord_class) do |o|
>      obj_ary.push(o) unless o.leader # here
>    end
>    obj_ary
>  end
>
> If I don't have the 'unless o.leader' expression modifier, it pushes
> like a million of the 'leader' objects and raises a SystemStackError.
>
> I have no idea why, and would really appreciate an answer.
>
> Thanks,
>
> -Luke
>
> --
> Posted via http://www.ruby-forum.com/.
>
>

When I ran your script, I didn't get that error. I got this output:


Test
true
#<Test:0x0ac544>
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys
hey guys

#<Test:0x0ac7ec> jumps: 'look at me!'

#<Test:0x0ac5bc> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac60c> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac620> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac634> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac65c> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac6c0> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac710> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac738> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac74c> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac760> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac788> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac7ec> jumps: 'Ahhhhhhhhh!'
#<Test:0x0ac544> jumps: 'Ahhhhhhhhh!'

#<Test:0x0ac7ec>
#<Test:0x0ac788>
ouch
ouch
ouch
ouch
ouch
ouch
ouch
ouch
ouch
ouch
ouch
ouch



Typically, SystemStackError is due to recursing for too long, perhaps I have
more memory than you, or perhaps the Ruby I'm using (1.9.2-p180) is less
memory intensive than the one you're using. Anyway, it should give you a
message with more information and a stack trace / line number that tells you
where to begin looking.

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