From: Robert Klemme <shortcutter@...>
Date: 2008-09-26T03:31:24+09:00
Subject: Re: Getting the right class with inheritance and super()

2008/9/25 Kyle Schmitt <kyleaschmitt@gmail.com>:
> Reading the example you gave, and even some on the net, it looks like
> I'd need the Array class to have a coerce method that can change an
> Array into a FixedSizeArray?

No.  Your coerce method needs to take care.  Look at my example.  I
did not change Fixnum or Float.

> On Thu, Sep 25, 2008 at 9:51 AM, Robert Klemme
> <shortcutter@googlemail.com> wrote:
>> If you think about it for a moment you'll realize that your
>> FixesSizedArray is far from usable in every place where an Array is
>> used.  Just think about algorithms that rely on collecting arbitrary
>> many objects in an Array (e.g. File.readlines) - you cannot use your
>> FixedSizedArray there.
>
> I agree that it can't be used everywhere, but where I want to use it,
> I want it to look and feel very much like an array.

That's ok but that does not mean that a FixedSizedArray *is an* Array.
 I was talking about semantics of inheritance which is usually denoted
*is a* relationship.

Cheers

robert


-- 
use.inject do |as, often| as.you_can - without end