[#395238] rubygem: ispunity (unite all your internet connections) — Arun Tomar <tomar.arun@...>

Dear friends,

12 messages 2012/05/01

[#395250] Overwriting one Ruby array or arrays with another — Craig Law <lists@...>

Hi

14 messages 2012/05/02

[#395258] array of strings - finding letter combinations — "Sebastjan H." <lists@...>

Hi All,

16 messages 2012/05/02

[#395357] Why Enumerator#next does not return more than one value? — Földes László <lists@...>

If I have an Enumerator which yields elements of a mathematical series

10 messages 2012/05/07

[#395373] How to use Data_Wrap_Struct to assign the DATA VALUE to an exsiting Ruby object? — Iñaki Baz Castillo <ibc@...>

Hi, my code receives an arbitrary klass name (provided by the user)

8 messages 2012/05/07

[#395429] passing via instance variable or regular () — sam jam <lists@...>

def first

10 messages 2012/05/10

[#395463] I'm looking for a Metaprogramming Project — Phil Stone <lists@...>

Hello,

19 messages 2012/05/11

[#395548] A million reasons why Encoding was a mistake — Marc Heiler <lists@...>

Newcomer wants to try Ruby.

15 messages 2012/05/15
[#395561] Re: A million reasons why Encoding was a mistake — Ryan Davis <ryand-ruby@...> 2012/05/15

[#395595] Re: A million reasons why Encoding was a mistake — Brian Candler <lists@...> 2012/05/16

I will add that the OP is not entirely alone in his opinion.

[#395551] How to ensure that a block runs entirely after other threads? (Thread.exclusive does not "work") — Iñaki Baz Castillo <ibc@...>

Hi, I expected that in the following example code, thread t1 would not

8 messages 2012/05/15

[#395575] GUI with ruby on windows — David Acosta <lists@...>

hello friends, i am a begginer and i have a litlle question, how can i

17 messages 2012/05/16

[#395604] what is going wrong here? — roob noob <lists@...>

Notice the initialization of both classes in each of the examples, if

20 messages 2012/05/16

[#395646] rb_gc_register_address() or rb_gc_mark()? — Iñaki Baz Castillo <ibc@...>

Hi, I've bad experiences with rb_gc_register_address(), it does never

16 messages 2012/05/17

[#395686] reading from and writing to a Unicode encoded file — "Sebastjan H." <lists@...>

Hi,

19 messages 2012/05/18
[#395694] Re: reading from and writing to a Unicode encoded file — Regis d'Aubarede <lists@...> 2012/05/18

Hello,

[#395697] Re: reading from and writing to a Unicode encoded file — "Sebastjan H." <lists@...> 2012/05/18

Regis d'Aubarede wrote in post #1061272:

[#395698] Re: reading from and writing to a Unicode encoded file — Regis d'Aubarede <lists@...> 2012/05/18

Sebastjan H. wrote in post #1061276:

[#395699] Re: reading from and writing to a Unicode encoded file — "Sebastjan H." <lists@...> 2012/05/18

Regis d'Aubarede wrote in post #1061277:

[#395750] Re: reading from and writing to a Unicode encoded file - issues when using Shoes — "Sebastjan H." <lists@...> 2012/05/21

Hi,

[#395754] Re: reading from and writing to a Unicode encoded file - issues when using Shoes — "Sebastjan H." <lists@...> 2012/05/21

Sebastjan H. wrote in post #1061483:

[#395740] ? Ruby through CGI and Rails — Shaun Lloyd <list@...>

Hi everybody,

22 messages 2012/05/21
[#395764] Re: Ruby through CGI and Rails — Brian Candler <lists@...> 2012/05/21

Shaun Lloyd wrote in post #1061455:

[#395786] Re: Ruby through CGI and Rails — Shaun Lloyd <list@...> 2012/05/22

On 22/05/12 03:37, Brian Candler wrote:

[#395838] Re: Ruby through CGI and Rails — Brian Candler <lists@...> 2012/05/23

Shaun Lloyd wrote in post #1061602:

[#395787] Changing self class from inside a method?? — David Madison <lists@...>

Let's start off with the assumption I want a method that allows an

10 messages 2012/05/22

[#395841] Memory-efficient set of Fixnums — George Dupre <lists@...>

Hi,

25 messages 2012/05/23

[#395883] looking for a ruby idiom : r=foo; return r if r — botp <botpena@...>

Hi All,

11 messages 2012/05/24

[#395966] Am I justified to use a global variable if it must be used in all scopes? — Phil Stone <lists@...>

Hello,

12 messages 2012/05/27

[#396010] does this leak more than the size of the string via timing side channels — rooby shoez <lists@...>

string1 = "string"

16 messages 2012/05/29

[#396038] Is it possible to avoid longjmp in exceptions, Thread#kill, exit(), signals? — Iñaki Baz Castillo <ibc@...>

Hi, my Ruby C extension runs a C loop (libuv) without GVL. At some

8 messages 2012/05/29

Re: Don't override it - Use it

From: Matthew Kerwin <matthew@...>
Date: 2012-05-25 02:44:16 UTC
List: ruby-talk #395919
On 25 May 2012 12:31, Duong Quang Ha <quangduongha@gmail.com> wrote:
> Hi,
>
>
> On Fri, May 25, 2012 at 8:10 AM, Doug Jolley <lists@ruby-forum.com> wrote=
:
>>
>> > And it *is* actually called overriding:
>> > http://en.wikipedia.org/wiki/Method_overriding
>>
>> I read the wikipedia link. =A0As a reader who knows nearly nothing, it
>> would seem to me that the methodology that I described would not qualify
>> as "overriding" according to the definition contained in the wikipedia
>> post because the wikipedia post (like other posts I have read) says that
>> in order to qualify as "overriding" the method in the child class has to
>> *replace* the method in the super class. =A0In my example, I don't see t=
he
>> method in the child class *replacing* the method in the super class
>> because the method in the child class actually uses the method in the
>> super class. =A0I don't see how one can say that a method has been
>> *replaced* if it is being used. =A0None-the-less, if that is the
>> conventional wisdom, I'm happy to go along with it. I just need to
>> adjust my understanding of what "overriding" means.
>>
>> Thanks again for the input and for helping me understand what
>> "overriding" means.
>>
>
> In Ruby, the *overriding* actually is *shadow* the superclass's method
> (hope that I used right word). You can't direct call the superclass's met=
hod
> but it still around, it don't be removed.
>
> When you call super, it'll go up in the class's
> inheritance=A0tree=A0step-by-step
> and find method with same name.
> (sorry for my bad English)

This is always the case in OOP, in fact that's the very definition of
method overriding.  You could argue that in a compiled language the
functions are projected downward from the class into the instantiated
object, and therefore an intermediate subclass effectively blocks the
superclass's function projection, replacing it with its own function
definition; however that doesn't necessarily "destroy" or overwrite
the superclass's function (see: Java `super` keyword.)

To complete the jargon: "overriding" means defining a behaviour in a
subclass that supersedes the behaviour that would have been provided
by the superclass; "shadowing" means defining a datum in an inner
scope that does not write its value over that of a datum of the same
name in an outer scope; and "redefining" means replacing a value of
behaviour with another, irretrievably.

--=20
=A0 Matthew Kerwin, B.Sc (CompSci) (Hons)
=A0 http://matthew.kerwin.net.au/
=A0 ABN: 59-013-727-651

=A0 "You'll never find a programming language that frees
=A0 you from the burden of clarifying your ideas." - xkcd

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