[#403837] Why none of the block giving the expected output with the "enumerator"? — Arup Rakshit <lists@...>

Why none of the block giving the expected output with the "enumerator"?

9 messages 2013/02/02

[#403870] Confusion with Enum#with_object block argument construct — Arup Rakshit <lists@...>

C:\>irb

9 messages 2013/02/03

[#403920] Character classes use in Ruby — Love U Ruby <lists@...>

Can anyone help me by giving an explanatory example of each of the

13 messages 2013/02/04

[#403935] How to stop page loading using selenium-web driver? — Love U Ruby <lists@...>

How to stop page loading using selenium-web driver?

11 messages 2013/02/04

[#403972] Ruby could recognize the values when putting into a webpage text filed. — Love U Ruby <lists@...>

SGksCgpJIGhhdmUgc29tZSB2YWx1ZXMgaW4gbXkgRXhjZWwgYXMgYmVsb3c6

9 messages 2013/02/05

[#403986] old syntax? what's going on here — tamouse mailing lists <tamouse.lists@...>

I have this in a _spec.rb file: (a gem I inherited at work)

11 messages 2013/02/05

[#404005] Implementing DRY with a function call — Rob Marshall <lists@...>

Hi,

12 messages 2013/02/05

[#404006] using an instance variable inside a method — FirstName Surname <lists@...>

Hello.

19 messages 2013/02/05

[#404021] Not able get the label text incurred with <input> element — Love U Ruby <lists@...>

I do have a below `HTML`:

18 messages 2013/02/05

[#404025] Symbol.defined? — Student Jr <lists@...>

Symbol deserialization from external sources is now known to be

15 messages 2013/02/06

[#404058] Ruby 1.9.3-p362 on Mac OSX — Peter Bailey <lists@...>

Hi,

13 messages 2013/02/06

[#404082] Problem building Ruby 1.9.3 patchlevel 385 under AIX 7.1 — Ruby Student <ruby.student@...>

Hello World!

10 messages 2013/02/06

[#404101] Issues from an extreme beginner — Bruce Palmer <lists@...>

Hey guys, great to be part of such a great community! I look forward to

19 messages 2013/02/07
[#404104] Re: Issues from an extreme beginner — Bruce Palmer <lists@...> 2013/02/07

Ahh, thank you Matthew! That was just the push I needed!

[#404208] elegant way to determine if something is defined — tamouse mailing lists <tamouse.lists@...>

Something like:

15 messages 2013/02/10

[#404218] Ruby Equivalent to VB's "With"? — Joel Pearson <lists@...>

I've looked around but I couldn't find anything helpful on this,

11 messages 2013/02/10

[#404235] The "ruby way" to do desktop applications? — "guirec c." <lists@...>

Hello,

17 messages 2013/02/11

[#404238] Best books for "advanced" programmers — "guirec c." <lists@...>

Hello,

18 messages 2013/02/11

[#404245] Issue with Excel column values read. — Love U Ruby <lists@...>

Hi,

22 messages 2013/02/11

[#404344] Ruby command line options s and S — Love U Ruby <lists@...>

Can anyone help me to understand the difference between s and S with

15 messages 2013/02/13

[#404386] Re: Ruby command line options s and S — "D. Deryl Downey" <me@...>

Dude!

20 messages 2013/02/14

[#404387] Ruby Multithreaded producer-consumer problem — Abhijit Sarkar <lists@...>

Hi,

26 messages 2013/02/14
[#404896] Re: Ruby Multithreaded producer-consumer problem — Abhijit Sarkar <lists@...> 2013/02/24

Bump!

[#404456] skip iteration in each loop — Saurav Chakraborty <lists@...>

I want to skip iteration for few values depending on dynamic condition.

11 messages 2013/02/15

[#404491] so, what's the proper way to replace funcionality of GOTO ? — "Stu P. D'naim" <lists@...>

I need to make few scripts for tasks I do often manually, but last time

27 messages 2013/02/15
[#404492] Re: [from BASIC to Ruby] so, what's the proper way to replace funcionality of GOTO ? — Love U Ruby <lists@...> 2013/02/15

Stu P. D'naim wrote in post #1097111:

[#404494] Re: [from BASIC to Ruby] so, what's the proper way to replace funcionality of GOTO ? — Ryan Victory <ryan@...> 2013/02/15

Love U Ruby: I'm really not sure what you meant by that response, but

[#404570] What is Ruby's default constructor? — Love U Ruby <lists@...>

Hi,

12 messages 2013/02/17

[#404632] Re: splat operator and Ruby instance variable assignments — Marc Heiler <lists@...>

Ok, understood what the guy wants ...

17 messages 2013/02/19
[#404640] Re: splat operator and Ruby instance variable assignments — Love U Ruby <lists@...> 2013/02/19

Marc Heiler wrote in post #1097736:

[#404645] Re: splat operator and Ruby instance variable assignments — Ryan Davis <ryand-ruby@...> 2013/02/19

[#404646] Re: splat operator and Ruby instance variable assignments — Love U Ruby <lists@...> 2013/02/19

Ryan Davis wrote in post #1097840:

[#404647] Re: splat operator and Ruby instance variable assignments — Peter Hickman <peterhickman386@...> 2013/02/19

On 19 February 2013 20:35, Love U Ruby <lists@ruby-forum.com> wrote:

[#404648] Re: splat operator and Ruby instance variable assignments — Love U Ruby <lists@...> 2013/02/19

Peter Hickman wrote in post #1097848:

[#404696] THE CLASS/OBJECT CHICKEN-AND-EGG PARADOX — "Xavier R." <lists@...>

Hi,

25 messages 2013/02/20
[#404699] Re: THE CLASS/OBJECT CHICKEN-AND-EGG PARADOX — Matt Mongeau <halogenandtoast@...> 2013/02/20

Maybe you could provide more detail about what you are confused about. To

[#404700] Re: THE CLASS/OBJECT CHICKEN-AND-EGG PARADOX — "Xavier R." <lists@...> 2013/02/20

Matt Mongeau wrote in post #1098058:

[#404705] Re: THE CLASS/OBJECT CHICKEN-AND-EGG PARADOX — Matt Mongeau <halogenandtoast@...> 2013/02/20

It's not really a paradox. Take for example

[#404738] backslash substitution — Mario Ruiz <lists@...>

don't know why... but this is not working

18 messages 2013/02/21

[#404809] Difference of 2 dates interms of years. — "Xavier R." <lists@...>

how can we get the experience years between two dates(ex:2012-01-11 to

13 messages 2013/02/22

[#404817] Not able to understand the difference between "||=" and "|=". — "Xavier R." <lists@...>

>> a = []

12 messages 2013/02/22

[#404839] range is not assigning to the splat variable. — Love U Ruby <lists@...>

Why splat variable couldn't take in the below two code the "range" ->

10 messages 2013/02/23

[#404842] Why class returning its own name when "include" statement? — Love U Ruby <lists@...>

I was actually playing around with the class definition return values.

16 messages 2013/02/23
[#404844] Re: Why class returning its own name when "include" statement? — Love U Ruby <lists@...> 2013/02/23

@Stefano Yes you are right. The below code is proved that.

[#404867] how to see the class creation time in Ruby? — Love U Ruby <lists@...>

In Ruby any chance to see the last-modified time of a specific class?

15 messages 2013/02/23

[#404901] Confusion with `nil` value being produced by IRB in case of Array#size manipulation. — Love U Ruby <lists@...>

enum[int] =3D obj =E2=86=92 obj

10 messages 2013/02/24

[#404921] How should I print only the last combination when using Array#combination(n) ? — Love U Ruby <lists@...>

>> a = [1,2,3]

15 messages 2013/02/24

[#405026] Please, help (GCD) greatest common divisor. — Caddy Tonks Lupin <lists@...>

Write a program to read two integers and show their greatest common

17 messages 2013/02/26

[#405059] Does this specific sound library exist? — Dirk Vogel <lists@...>

Hi there,

16 messages 2013/02/26

[#405067] Mac OS 10.8.2 and openssl — "Dr. Hegewald" <hegewald@...>

Hi everybody,

24 messages 2013/02/27

[#405079] Why `10` not returned without the `return` from the block ? — Love U Ruby <lists@...>

CODE - I

10 messages 2013/02/27

[#405107] Object track llist for a particular class. — "Xavier R." <lists@...>

Say I have created more than one instances from a particular class as

13 messages 2013/02/27

[#405145] Discussion on Ruby's `alias` — Tukai Patra <lists@...>

>> class Foo

27 messages 2013/02/28

[#405175] telnet - how to loop through commands listed in a file — Bob Ford <lists@...>

Let me first explain what I'm trying to do. I have written a very

18 messages 2013/02/28

Re: How meta class differs from real class ?

From: Stu <stu@...>
Date: 2013-02-21 22:55:08 UTC
List: ruby-talk #404779
On Wed, Feb 20, 2013 at 3:54 PM, Xavier R. <lists@ruby-forum.com> wrote:
> In Ruby-
>
> Could anyone help me to understand how meta class differs from real
> class ?
>
> Examples with discussion could be better to understand the core of the
> concept
>

Core concept for meta class is that every class has it's own class.
One view would be that it's an anonymous class or hidden class as I've
seen explained.

Instead of producing and example for you as they can provide a handful
of use cases and design concepts for your program's model it may be
better for you to view various takes on the interwebz for it's general
concept though various combinations of code and style. More
importantly it may be useful to understand that a meta class is just
as real as a class though it's scoping does not follow the normal
method lookup chain at the top level instance. One may also consider
further modification after the instance is constructed by redefinition
of the instance object.

Take the time and experiment with both opening up the meta class in
your class templates. Create your own macros( for example try to make
your own attribute generators). explore post instantiations with
singleton assignment and delegations.

More importantly explore these concepts within the repl and editor
combination. Think of the concept that Matz created ruby to be a
"Programmable Programming Language". Though that quote was from
another language which heavily influenced ruby it's a major part of
ruby's computational model.

Also instead of getting stuck on the recursive writing style of
various tutorials which attempt to verbalize the Class<=3D>Object
relationship and paradigm consider simply taking the time and coding
simple functions yourself while viewing the yielded results from trial
and error will provide you more substantial experience on grokking the
interpreter (as well as how the interpretation of the code works)
which will get you closer to understanding the sheer power and control
available to you with this overly malleable and versatile programming
language.

If you are really stuck work though this one:
http://madebydna.com/all/code/2011/06/24/eigenclasses-demystified.html

Though the link to _why's metaclass earlier in this thread should also
be explored as well as many of the other blog posts which disseminate
the subject exhaustively. Metaprogramming in Ruby: It=92s All About the
Self was another one which provides trivial examples. For real world
examples you'll want to explore how domain specific micro-languages in
ruby are implemented which will provide the end result of combining
the automata, stream processing, and list reference and recursion
techniques within the context of the programming language.

~Stu

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