Hi William,
I haven't seen any general answers to your original question so I will take
a shot at it.
Disclaimer: Some of this discussion may infringe on the religious bent of
certain programming cults. This author has no desire to challenge any
deeply held beliefs.
The reason that classes were born IMHO is basically three fold
encapsulation, reuse, and inheritance.
encapsulation allows you to create variables and functions that are only
recognized within the context of the instance of a class you have
created. In Lingo you can create a class, or parent script in lingo
parlance, properties and functions created within the class are referenced
only through the class. This means that you can have multiple classes and
use the same names for functions and properties unambiguously. It also
means that each instance you create can have its own values for the classes
properties. Reuse means that once you have developed and debugged a class
you can create instances of it without worrying about introducing new
errors. Inheritance means that one class can be based on another the new
class has the properties and methods of the parent class, or super class
plus whatever new properties and methods are made available in the new class.
This is a very rough thumbnail sketch of classes and why we use them. In
the example below I have not used inheritance but have show the basics of
classes.
--------------------------------------------------------
-- member name: foo
--------------------------------------------------------
property val
On new me
val = "foo"
return me
end
On Set me, v
val = v
end
On Get me
return val
end
--------------------------------------------------------
-- member name: bar
--------------------------------------------------------
property val
On new me
val = "bar"
return me
end
On Set me, v
val = v
end
On Get me
return val
end
--------------------------------------------------------
-- Message window
--------------------------------------------------------
f1 = new(script "foo")
f2 = new(script "foo")
f2.set(10)
b1 = new(script "bar")
put f1.Get()
-- "foo"
put f2.Get()
-- 10
put b1.Get()
-- "bar"
In summary, your friend is right fully understanding all this takes time
and experience.
Mark M. Henwood
At 07:38 AM 12/26/2001 -0500, you wrote:
>No need to appologize, you are saving me countless hours of trying to
>figure this out on my own. I have pretty much taurgt myself all that I know
>sbout programming with a degree of success, but I had a feeling this was
>something I needed to get more insight on before I wasted time with code
>that I couldn't use.
>
>Thanks again,
>william m-
>
>Quoting Irv Kalb <[EMAIL PROTECTED]>:
>
> > Sorry for the typo. Here it is:
> >
> > http://www.furrypants.com/loope
> >
> > Irv
>
>
>[To remove yourself from this list, or to change to digest mode, go to
>http://www.penworks.com/lingo-l.cgi To post messages to the list,
>email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED])
>Lingo-L is for learning and helping with programming Lingo. Thanks!]
At 07:38 AM 12/26/2001 -0500, you wrote:
>No need to appologize, you are saving me countless hours of trying to
>figure this out on my own. I have pretty much taurgt myself all that I know
>sbout programming with a degree of success, but I had a feeling this was
>something I needed to get more insight on before I wasted time with code
>that I couldn't use.
>
>Thanks again,
>william m-
>
>Quoting Irv Kalb <[EMAIL PROTECTED]>:
>
> > Sorry for the typo. Here it is:
> >
> > http://www.furrypants.com/loope
> >
> > Irv
>
>
>[To remove yourself from this list, or to change to digest mode, go to
>http://www.penworks.com/lingo-l.cgi To post messages to the list,
>email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED])
>Lingo-L is for learning and helping with programming Lingo. Thanks!]
At 07:38 AM 12/26/2001 -0500, you wrote:
>No need to appologize, you are saving me countless hours of trying to
>figure this out on my own. I have pretty much taurgt myself all that I know
>sbout programming with a degree of success, but I had a feeling this was
>something I needed to get more insight on before I wasted time with code
>that I couldn't use.
>
>Thanks again,
>william m-
>
>Quoting Irv Kalb <[EMAIL PROTECTED]>:
>
> > Sorry for the typo. Here it is:
> >
> > http://www.furrypants.com/loope
> >
> > Irv
>
>
>[To remove yourself from this list, or to change to digest mode, go to
>http://www.penworks.com/lingo-l.cgi To post messages to the list,
>email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED])
>Lingo-L is for learning and helping with programming Lingo. Thanks!]
[To remove yourself from this list, or to change to digest mode, go to
http://www.penworks.com/lingo-l.cgi To post messages to the list,
email [EMAIL PROTECTED] (Problems, email [EMAIL PROTECTED])
Lingo-L is for learning and helping with programming Lingo. Thanks!]
