From: Pascal GUICHARD <pascal.guichard@...>
Date: 2005-10-03T03:00:03+09:00
Subject: Re: C++ equivs in Ruby

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my point is :
- on pymorphism, i have seen ruby code that is testing what is the type
(class, name) that is calling this pice of code, and that sounds very
strange to me,
- on pointers, i try to understand (howto implement) datastructures in whic=
h
you need to mix values and references/poiters

Pascal
 On 10/2/05, Devin Mullins <twifkak@comcast.net> wrote:
>
> Pascal GUICHARD wrote:
>
> > Could you give me an enlightment about :
> > - polymorphism (method overloading, virtual methods)
> >
> >
> class A
> def fun(arg); puts "Hello, #{arg}!" end
> end
> class B
> def fun(baz); puts "Hiya, #{baz}!" end
> end
> def greet(obj)
> obj.fun
> end
> greet A.new
> greet B.new
>
> Unlike statically typed languages, there is no need for inheritance to
> achieve polymorphism.
>
> >- pointers (i know these can be described as having some problems with
> them,
> >how to implement (for example, linked lists, binary trees, and so on)
> >
> >
> What Martin said. All variables are pointers. (Contrast 'variable' with
> 'return value', for instance. You can't [easily] return a pointer to an
> object. However, there are plenty of subsitutes, usually better.)
>
> Devin
>
>
>

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