[Newbies] constants

[Marcin Tustin]

A class is "just" another object whose own class is Class. I actually don't
know when the class initialisiation method is called after creation. As
usual, if all it does is things you know to be safe, go ahead and call it
manually.

On 9/29/08, Mark Volkmann <mark at ociweb.com> wrote:
>
>  On Sep 29, 2008, at 6:00 AM, Marcin Tustin wrote:
>
> The initialize method on the class side will be called only when *the
> class* is initialised. You are thinking of the instance-side initialize
> method which is called each time you create an instance.
>
>
>
> Wow. I wasn't aware that there was both a class and instance initialize
> method. Thanks for explaining that!
>
>
> What causes the class initialize method to be invoked ... and reinvoked
> after I change it?
>
>  On 9/29/08, Mark Volkmann <mark at ociweb.com> wrote:
>>
>> On Sep 28, 2008, at 11:32 PM, K. K. Subramaniam wrote:
>>
>> On Sunday 28 Sep 2008 7:26:43 pm Mark Volkmann wrote:
>>>
>>>> I think my main issue is scoping. I want to define a constant that is
>>>> associated with a class to avoid name conflicts.
>>>>
>>> See classes Color, Cursor or Float for examples of scoped constants:
>>>  Color red
>>>  Cursor wait
>>>  Float pi
>>>
>>> For constants that should be exposed to a few (but not all) classes, use
>>> pool
>>> dictionaries.
>>>
>>
>> Thanks! This brings up another question. Where is a good place to
>> initialize a constant? I see in the case of "Float pi" that it is held in a
>> class variable that is initialized in the initialize method. Isn't it the
>> case that the initialize method is only called if a Float object is created?
>> Also, isn't it called every time a Float object is created? It seems that
>> would mean if I followed that pattern for one of my own constants then I
>> wouldn't be sure it was set and I'd pay the cost of setting it many times.
>>
>> ---
>> Mark Volkmann
>>
>>
>>
>>
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> ---
> Mark Volkmann
>
>
>
>
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