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From: krause@prlhp1.prl.philips.co.uk (krause)
Newsgroups: comp.lang.smalltalk
Subject: Question on Ordered Collections
Message-ID: <1045@prlhp1.prl.philips.co.uk>
Date: 5 Feb 90 12:19:25 GMT
Reply-To: krause@prlhp1.UUCP ()
Distribution: comp.lang.smalltalk
Organization: Philips Research Laboratories, Redhill, UK
Lines: 43

Hi,

A quick smalltalk question.

If you code something like:

    Fred <- OrderedCollection new
        add: 'anItem';
        add: 'anOtherItem';
        add: 'finalItem'

Fred will NOT be an ordered collection, but a string.
                                              ------

coding: 
       
    Fred <- OrderedCollection new
       add: 'anItem';
       add: 'anOtherItem';
       add: 'finalItem';
       yourself

Will result in Fred becoming an ordered collection. The funny thing is that yourself
is a method that does nothing. I even coded up a dummy method for ordered collection
and used that instead of yourself .... this resulted in Fred being correct.

Code like 

    Fred <- OrderedCollection new.
    Fred add: 'anItem';
       add: 'anOtherItem';
       add: 'finalItem'
              

works as I currently expect.

Has anyone any comments or suggestions? Exactly WHAT IS OCCURING? 

I have smalltalk version 2.3 running on an Apollo.


David
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