[#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: Sigurd <cu9ypd@...>
Date: 2012-03-06 20:08:50 UTC
List: ruby-talk #393756
defined? is a INSN RTL, there for it's not "defined" in the ruby script =
lexical scope.=20
To be clearer - it's Ruby keyword, not a method or whatever.

On Mar 6, 2012, at 9:55 PM, Sam Duncan wrote:

> On 07/03/12 08:48, Ralph Shnelvar wrote:
>> Sam,
>>=20
>> Tuesday, March 6, 2012, 12:09:45 PM, you wrote:
>>=20
>> 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
>>>>=20
>>>> irb(main):032:0>   class Bogey<   Dance
>>>> irb(main):033:1>   def bar
>>>> irb(main):034:2>   a=3D0
>>>> 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
>>>> =3D>   nil
>>>> irb(main):040:0>   Bogey.new.bar
>>>> foo ->   "method"
>>>> a ->   "local-variable"
>>>> none ->   nil
>>>> =3D>   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.
>>=20
>> SD>  Sam
>>=20
>> Indeed, it is a great answer. Thanks Robert!
>>=20
>> Now where in online documentation can I find where "defined?" is =
documented?
>>=20
>> I see it explained on page 137 of the Pickaxe book but is there more =
formal documentation online?
>>=20
>> Also ... I find it interesting that I get a syntax error when I do
>>   defined? defined?
>=20
> Yeah, that is odd.
>=20
> 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?
> =3D> "expression"
>=20
> Sam
>=20
>=20


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