[Q] Why removeLast and removeFirst is implemented into OrderedCollection ?

Why removeLast and removeFirst is implemented into OrderedCollection ?
It's not wiser have it into Collection so this way is more useful ?

Edgar



       

       
               
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On 1/17/07, Edgar J. De Cleene <[hidden email]> wrote:
> Why removeLast and removeFirst is implemented into OrderedCollection ?
> It's not wiser have it into Collection so this way is more useful ?
>
> Edgar
>
Probably because they don't make any sense unless you're dealing with
an OrderedCollection
How do you know what "first" and "last" are unless there is some sort of order?

Regards,
Stuart.

Collection lacks ordering as concept.
SequenceableCollections are immutable.
OrderedCollection is first one that is mutable and allows adding/
removing elements.

-Todd Blanchard

On Jan 17, 2007, at 2:16 AM, Edgar J. De Cleene wrote:

> OrderedCollection is first one that is mutable and allows adding/
> removing elements.

Ok, that's redundant - I mean is ordered and mutable.

On Jan 17, 2007, at 3:50 AM, Todd Blanchard wrote:

El 1/17/07 8:50 AM, "Todd Blanchard" <[hidden email]> escribió:

> Collection lacks ordering as concept.
> SequenceableCollections are immutable.
> OrderedCollection is first one that is mutable and allows adding/
> removing elements.
>
> -Todd Blanchard

Ok. I get.
My mistake was what in real life any objects what you collect always have a
"first" and "last".

If I describe what objects are now on top my desk, always see some first, my
glasses , pen , etc,  but of course is subjective and could't be translated
to a computer.

Very thanks.

Edgar



       

       
               
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