[AccessD] Class costs & benefits

...ok ...a basic view ...the real value comes when you can inherit from more 
than one object and you can pick and choose what you inherit ...within 
reason, you can build practically anything without having to start from 
scratch ...VS gives you some basic tools, a grid for instance ...and you can 
go a long time before it dawns on you that you don't have to accept that 
basic grid ...you can reach back in the object hierarchy and build a grid 
that does what YOU need ...a treeview with a grid node for instance ...all 
without having to lay out bucks for third party tools that only do half of 
what you wanted.

...to me, that's the real value of working with dot net ...there is sooooo 
much built in high level stuff that lets you easily build low level custom 
objects for your apps ...and sooooooo many blogs out there with guys doing 
highly creative things that its nigh impossible to keep up.

William

--------------------------------------------------
From: "jwcolby" <jwcolby at colbyconsulting.com>
Sent: Wednesday, February 25, 2009 4:14 PM
To: "Access Developers discussion and problem solving" 
<accessd at databaseadvisors.com>
Subject: Re: [AccessD] Class costs & benefits

> The simplest illustration is to say that inheritance is the ability to 
> define your own object as
> starting from something already in existence.
>
> Inheritance in the programming world mimics inheritance in the genetic 
> world except that in most
> languages you are only allowed to inherit properties from a single parent.
>
> So.  I am my dad.  I get everything my dad has, his eyes, his height, his 
> race, his ...
>
> I add to what I inherited.
>
> I add a bunch of extra pounds.  I add the experience of living in Mexico 
> for five years.  I add the
> knowledge of building computers.
>
> In programming.  I inherit a text control.  I add code to check my control 
> source to see what data
> type it is.  I then add new method to make my display format depend on the 
> data type I am bound to.
>
> I have all of the normal properties of a text box.  I can generate all of 
> the events that the text
> box generated.  But I have additional code to check my data type and 
> format myself differently
> depending on the data type.  And other useful things.
>
> That in a nutshell is inheritance.
>
> Access does not have inheritance.  That doesn't Accesses classes useless 
> however.  A class is far
> more than the ability to inherit another object, even in languages where 
> inheritance is possible.
>
> John W. Colby
> www.ColbyConsulting.com
>
>
> Rocky Smolin at Beach Access Software wrote:
>> "I will promise to treat every opinion as valid and not go into rant 
>> mode.
>> ;)" Gonna be a pretty dull thread.
>>
>> For those of who don't know, can you define inheritance?
>>
>>
>> Rocky Smolin
>> Beach Access Software
>> 858-259-4334
>> www.e-z-mrp.com
>> www.bchacc.com
>>
>>
>>
>> -----Original Message-----
>> From: accessd-bounces at databaseadvisors.com
>> [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of jwcolby
>> Sent: Wednesday, February 25, 2009 7:48 AM
>> To: Access Developers discussion and problem solving
>> Subject: [AccessD] Class costs & benefits
>>
>>  From Rocky's email I thought that perhaps a thread on what the costs and
>> benefits are for classes.
>>
>> Jim made a statement that he felt that "Access has no implementation
>> inheritance and since inheritance really is the whole point of using
>> classes, I think they are more or less a waste in Access".
>>
>> So what are your feelings and opinions about classes?
>>
>> I will promise to treat every opinion as valid and not go into rant mode.
>> ;)
>>
>> In fact I will promise to not respond to any message unless the author
>> specifically asks me to for some reason.
>>
>> --
>> John W. Colby
>> www.ColbyConsulting.com
>> --
>> AccessD mailing list
>> AccessD at databaseadvisors.com
>> http://databaseadvisors.com/mailman/listinfo/accessd
>> Website: http://www.databaseadvisors.com
>>
> -- 
> AccessD mailing list
> AccessD at databaseadvisors.com
> http://databaseadvisors.com/mailman/listinfo/accessd
> Website: http://www.databaseadvisors.com
>