From wbarnum at elmhurst205.org  Sat Jul 20 12:22:26 2024
From: wbarnum at elmhurst205.org (Barnum, William)
Date: Sat, 20 Jul 2024 11:22:26 -0500
Subject: alice-teacher Primitive and Object Types
Message-ID: <CAMDLx6G5BOVK4HMqm1KpvADdEdQSWJSmZ8G3LZoMaLdpqP5z9A@mail.gmail.com>

Are there any primitive types in Alice (e.g., int or boolean in Java), or
is everything an object type?

Is there any different vocabulary when discussing object types that are
initialized in code (e.g., WholeNumber or TextString) versus object types
that are created in the Scene Mode (e.g., Bear or Eagle)?

Thanks,
Bill

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From dslater at andrew.cmu.edu  Mon Jul 22 14:01:06 2024
From: dslater at andrew.cmu.edu (Donald Slater)
Date: Mon, 22 Jul 2024 14:01:06 -0400
Subject: alice-teacher Primitive and Object Types
In-Reply-To: <CAMDLx6G5BOVK4HMqm1KpvADdEdQSWJSmZ8G3LZoMaLdpqP5z9A@mail.gmail.com>
References: <CAMDLx6G5BOVK4HMqm1KpvADdEdQSWJSmZ8G3LZoMaLdpqP5z9A@mail.gmail.com>
Message-ID: <74F1F43E-F5F9-49A1-8E24-AC5C88EC1454@andrew.cmu.edu>

There are no primitive types in Alice. Alice uses the Java Wrapper classes so that all values are objects. Alice also uses synonyms, hopefully more descriptive, names for these wrapper classes, as in

	WholeNumber -> Integer
	DecimalNUmber -> Double
	TextString -> String

Although it does not come up frequently, if I understand your question correctly, objects created in Scene mode are referred to as objects ?managed by the scene editor? and objects created in code are referred to as ?unmanaged" properties and variables. These properties and variables are not just the wrapper types, but also Gallery Models and other objects available in the Alice System (events, etc.)

Let me know if you have any other questions.

All the best,
Don Slater

For the Alice Project

> On Jul 20, 2024, at 12:22?PM, Barnum, William via alice-teachers <alice-teachers at lists.andrew.cmu.edu> wrote:
> 
> Are there any primitive types in Alice (e.g., int or boolean in Java), or is everything an object type?
> 
> Is there any different vocabulary when discussing object types that are initialized in code (e.g., WholeNumber or TextString) versus object types that are created in the Scene Mode (e.g., Bear or Eagle)?
> 
> Thanks,
> Bill
> 
> This e-mail message contains information that may be confidential and is the property of the Board of Education of Elmhurst Community Unit School District 205.  It is intended only for the person(s) to whom it is addressed.  If you are not the intended recipient of this message, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof.  If you have received this message in error, please notify the sender immediately and delete all copies of this message.  Any communication sent or received by District 205 is a public record and may be subject to inspection or copying under the Illinois Freedom of Information Act (FOIA). _______________________________________________
> alice-teachers mailing list
> alice-teachers at lists.andrew.cmu.edu
> To change settings or unsubscribe visit:
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From vanderhyde at sxu.edu  Mon Jul 22 11:40:34 2024
From: vanderhyde at sxu.edu (Vanderhyde, James)
Date: Mon, 22 Jul 2024 15:40:34 +0000
Subject: alice-teacher Primitive and Object Types
In-Reply-To: <CAMDLx6G5BOVK4HMqm1KpvADdEdQSWJSmZ8G3LZoMaLdpqP5z9A@mail.gmail.com>
References: <CAMDLx6G5BOVK4HMqm1KpvADdEdQSWJSmZ8G3LZoMaLdpqP5z9A@mail.gmail.com>
Message-ID: <EF5D12D8-B2CC-4D38-B0AE-9DF79278CADE@sxu.edu>

Bill, that is an interesting question. When I teach with Alice, I barely use any variables at all. Method parameters and object properties are sufficient for most purposes. Whether these are references or values never seems to come up.

What difference does it make to Alice users whether a type is primitive or not?

James
?
James Vanderhyde
Associate Professor
Computer Science
Saint Xavier University
3700 W. 103rd St.
Chicago, IL 60655
773-298-3454
vanderhyde at sxu.edu
sxu.edu


Are there any primitive types in Alice (e.g., int or boolean in Java), or is everything an object type?

Is there any different vocabulary when discussing object types that are initialized in code (e.g., WholeNumber or TextString) versus object types that are created in the Scene Mode (e.g., Bear or Eagle)?

Thanks,
Bill

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From wbarnum at elmhurst205.org  Fri Jul 26 17:34:00 2024
From: wbarnum at elmhurst205.org (Barnum, William)
Date: Fri, 26 Jul 2024 16:34:00 -0500
Subject: alice-teacher Primitive and Object Types
In-Reply-To: <EF5D12D8-B2CC-4D38-B0AE-9DF79278CADE@sxu.edu>
References: <CAMDLx6G5BOVK4HMqm1KpvADdEdQSWJSmZ8G3LZoMaLdpqP5z9A@mail.gmail.com>
 <EF5D12D8-B2CC-4D38-B0AE-9DF79278CADE@sxu.edu>
Message-ID: <CAMDLx6G4ZT-Y2LYFmA2GvV=cN57-U0G-u=rfx2XoFiONrGn3tw@mail.gmail.com>

James,

You are right that it probably does not matter to Alice users.

Bill

On Tue, Jul 23, 2024 at 12:28?PM Vanderhyde, James <vanderhyde at sxu.edu>
wrote:

> Bill, that is an interesting question. When I teach with Alice, I barely
> use any variables at all. Method parameters and object properties are
> sufficient for most purposes. Whether these are references or values never
> seems to come up.
>
> What difference does it make to Alice users whether a type is primitive or
> not?
>
> James
> ?
>
> *James Vanderhyde *Associate Professor
> Computer Science
> Saint Xavier University
> 3700 W. 103rd St.
> <https://www.google.com/maps/search/3700+W.+103rd+St.+%0D%0AChicago,+IL+60655?entry=gmail&source=g>
> Chicago, IL 60655
> <https://www.google.com/maps/search/3700+W.+103rd+St.+%0D%0AChicago,+IL+60655?entry=gmail&source=g>
> 773-298-3454
> vanderhyde at sxu.edu
> sxu.edu
>
>
> Are there any primitive types in Alice (e.g., int or boolean in Java), or
> is everything an object type?
>
> Is there any different vocabulary when discussing object types that are
> initialized in code (e.g., WholeNumber or TextString) versus object types
> that are created in the Scene Mode (e.g., Bear or Eagle)?
>
> Thanks,
> Bill
>
> _______________________________________________
> alice-teachers mailing list
> alice-teachers at lists.andrew.cmu.edu
> To change settings or unsubscribe visit:
> https://lists.andrew.cmu.edu/mailman/listinfo/alice-teachers

-- 


This e-mail message contains information that may be?confidential and is 
the property of the Board of Education of Elmhurst Community Unit School 
District 205.? It is intended only for the person(s) to whom it is 
addressed.? If you are not the intended recipient of this message, you are 
not authorized to read, print, retain, copy, disseminate, distribute, or 
use this message or any part thereof.? If you have received this message in 
error, please notify the sender immediately and delete all copies of this 
message.? Any communication sent or received by District 205 is a public 
record and may be subject to inspection or copying under the Illinois 
Freedom of Information Act (FOIA).

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