[#393742] Getting the class of an object. — Ralph Shnelvar <ralphs@...32.com>

Consider;

14 messages 2012/03/06

[#393815] arcadia IDE requires tcl/tk and ruby-tk — Thufir Hawat <hawat.thufir@...>

which or where tcl and tk does arcadia require? Is this a gem which I

13 messages 2012/03/13

[#393952] What’s the best way to check if a feature/class has been loaded? — Nikolai Weibull <now@...>

Hi!

18 messages 2012/03/21
[#393953] Re: What’s the best way to check if a feature/class has been loaded? — Xavier Noria <fxn@...> 2012/03/21

Active Support has recently added qualified_const_* methods to Module

[#393954] Re: What’s the best way to check if a feature/class has been loaded? — Xavier Noria <fxn@...> 2012/03/21

Ah, that won't work in 1.8.

[#393959] Re: What’s the best way to check if a feature/class has been loaded? — Nikolai Weibull <now@...> 2012/03/21

On Wed, Mar 21, 2012 at 16:43, Xavier Noria <fxn@hashref.com> wrote:

[#393960] Re: What’s the best way to check if a feature/class has been loaded? — Xavier Noria <fxn@...> 2012/03/21

On Wed, Mar 21, 2012 at 8:17 PM, Nikolai Weibull <now@bitwi.se> wrote:

[#393961] Re: What’s the best way to check if a feature/class has been loaded? — Nikolai Weibull <now@...> 2012/03/21

On Wed, Mar 21, 2012 at 20:48, Xavier Noria <fxn@hashref.com> wrote:

[#393962] Re: What’s the best way to check if a feature/class has been loaded? — Xavier Noria <fxn@...> 2012/03/21

On Wed, Mar 21, 2012 at 9:51 PM, Nikolai Weibull <now@bitwi.se> wrote:

[#393967] Re: What’s the best way to check if a feature/class has been loaded? — Nikolai Weibull <now@...> 2012/03/22

On Wed, Mar 21, 2012 at 22:11, Xavier Noria <fxn@hashref.com> wrote:

[#393969] Re: What’s the best way to check if a feature/class has been loaded? — Xavier Noria <fxn@...> 2012/03/22

On Thu, Mar 22, 2012 at 6:15 AM, Nikolai Weibull <now@bitwi.se> wrote:

[#394154] uninitialized constant SOCKSSocket — Resident Moron <lists@...>

I am running ruby 1.9.3 on a linux box. I would like to use

10 messages 2012/03/29

[#394160] Why z = Complex(1,2) rather than z = Complex.new(1,2)? — Ori Ben-Dor <lists@...>

What's this syntax, z = Complex(1,2), as opposed to z =

14 messages 2012/03/29

[#394175] shoes no such file to load -- rubygems — Mr theperson <lists@...>

I have installed shoes to develop GUI applications but when I try and

13 messages 2012/03/29

[#394201] Can't open url with a subdomain with an underscore — Jeroen van Ingen <lists@...>

I try to open the following URL: http://auto_diversen.marktplaza.nl/

10 messages 2012/03/30

[#394222] Ruby openssl ECC help plz — no name <lists@...>

I am confused on how to properly export public ECC key. I can see it

13 messages 2012/03/31

Re: Getting the class of an object.

From: Sam Duncan <sduncan@...>
Date: 2012-03-06 19:55:18 UTC
List: ruby-talk #393755
On 07/03/12 08:48, Ralph Shnelvar wrote:
> Sam,
>
> Tuesday, March 6, 2012, 12:09:45 PM, you wrote:
>
> SD>  On 07/03/12 07:15, Robert Klemme wrote:
>>> You do not want the class but rather the kind of "foo".  "local
>>> variable" is not a class.  You can do
>>>
>>> irb(main):032:0>   class Bogey<   Dance
>>> irb(main):033:1>   def bar
>>> irb(main):034:2>   a=0
>>> irb(main):035:2>   printf "foo ->   %p\n", defined?(foo)
>>> irb(main):036:2>   printf "a ->   %p\n", defined?(a)
>>> irb(main):037:2>   printf "none ->   %p\n", defined?(none)
>>> irb(main):038:2>   end
>>> irb(main):039:1>   end
>>> =>   nil
>>> irb(main):040:0>   Bogey.new.bar
>>> foo ->   "method"
>>> a ->   "local-variable"
>>> none ->   nil
>>> =>   nil
> SD>  Great answer. I'm pretty new to Ruby and assumed that defined? returned
> SD>  a boolean. That'll learn me for not reading the manual.
>
> SD>  Sam
>
> Indeed, it is a great answer. Thanks Robert!
>
> Now where in online documentation can I find where "defined?" is documented?
>
> I see it explained on page 137 of the Pickaxe book but is there more formal documentation online?
>
> Also ... I find it interesting that I get a syntax error when I do
>    defined? defined?

Yeah, that is odd.

1.9.2p290 :001 > defined? defined?
SyntaxError: (irb):1: syntax error, unexpected $end
     from ~/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'
1.9.2p290 :002 > defined?(defined?)
SyntaxError: (irb):2: syntax error, unexpected ')'
     from ~/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'
1.9.2p290 :003 > defined? :defined?
  => "expression"

Sam


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