Beginners April 2009

beginners@lists.squeakfoundation.org

39 participants
28 discussions

Re: Beginners Digest, Vol 36, Issue 13
by Eric Caruyer 27 Apr '09

27 Apr '09

> Date: Sun, 26 Apr 2009 14:08:32 +0200 > From: Eric Caruyer <eric(a)responsable.com> > Subject: [Newbies] Adding or Install new category on squeak > To: beginners(a)lists.squeakfoundation.org > Message-ID: <49F44EC0.2010701(a)responsable.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hello, > > Trying the "hello world" samples, i saw that i didn't have the Speaker > class on my image. ( by looking the class browser ). > I would like to install the Speech-TTS category on my Squeak 3.10.2. but > i didn't found the good tutorials. > Is there someone that can point me to the good one ? > > Thanks in advance ! > > Eric. > > PS : Is there a relation between Squeak The Mouse ( Mattioli's character > ) and Squeak the Free Morphic implementation of SmallTalk ? > > > > ------------------------------ > > Message: 2 > Date: Sun, 26 Apr 2009 18:21:17 +0200 > From: Hern?n Morales Durand <hernan.morales(a)gmail.com> > Subject: Re: [Newbies] Adding or Install new category on squeak > To: "A friendly place to get answers to even the most basic questions > about Squeak." <beginners(a)lists.squeakfoundation.org> > Message-ID: > <70da5dd20904260921o638018ebv65ff44654a4ea60d(a)mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > > Hello Eric, > For the tools part Alexandre Bergel wrote a short and good tutorial here: > > http://www.bergel.eu/download/squeaktools.pdf > > You will find the Speech package in this repository: > > MCHttpRepository > location: 'http://source.squeakfoundation.org/39a' > user: '' > password: '' > > HernÃ¡n > > Thanks !

2 1

Array vs OrderedCollection
by Miguel Enrique Cobá Martínez 27 Apr '09

27 Apr '09

Hi all, are there any reason to prefer: "adding 2 objects" array := Array with: anObject. array := array copyWith: aSecondObject "removing object" array := array copyWithout: aSecondObject. instead of: "adding 2 objects" oc := OrderedCollection new. oc add: anObject. oc add: aSecondObject. "removing object" oc remove: aSecondObject ifAbsent: [] This in reference to Class >> addSubclass: and Class >> removeSubclass: methods Thanks for any answers Miguel Cobá

5 7

Squeak books
by dsilva＠reliability-analysis.net 27 Apr '09

27 Apr '09

I purchased two Squeak books a couple of years ago and then got side tracked. The titles of the books are: SQUEAK, Learn Programming with Robots. AND SQUEAK, A QUICK TRIP TO OBJECTLAND. This last book contains Squeak Version 3.0 on a CD ROM. Does anyone know if the above books are valid with the current version of Squeak? Your time and efforts are appreciated. Dick Silva.

3 2

Adding or Install new category on squeak
by Eric Caruyer 26 Apr '09

26 Apr '09

Hello, Trying the "hello world" samples, i saw that i didn't have the Speaker class on my image. ( by looking the class browser ). I would like to install the Speech-TTS category on my Squeak 3.10.2. but i didn't found the good tutorials. Is there someone that can point me to the good one ? Thanks in advance ! Eric. PS : Is there a relation between Squeak The Mouse ( Mattioli's character ) and Squeak the Free Morphic implementation of SmallTalk ?

2 1

standalone apps..
by sergio ruiz 24 Apr '09

24 Apr '09

was wondering if there was somewhere i could try out some standalone apps.. just to see how they look and feel (and play) with the operating system.. thanks! ___________ sergio t. ruiz network analyst red red design 419.281.8483

4 3

Squeak vs. Smalltalk
by Avidan Ackerson 22 Apr '09

22 Apr '09

I know that Squeak is written in Smalltalk, but are there specific advantages to Squeak over Smalltalk proper?

5 8

SimpleButtonMorph questions
by pop.mail.yahoo.com 21 Apr '09

21 Apr '09

To clarify my previous questions: I would like to change the label text color. (ie. white text on black button). I have tried to control the size of the button by using extent:, but it doesn't have an effect.

2 1

SimpleButtonMorph questions
by pop.mail.yahoo.com 21 Apr '09

21 Apr '09

I would like to change the label color of SimpleButtonMorphs. Also, I have a series of these buttons, and would like them to be the same length with the label centered. Any help would be appreciated.

2 1

Object references
by Miguel Enrique Cobá Martínez 21 Apr '09

21 Apr '09

Hi all, I have a question regarding the correct use of object references. Maybe this has already been asked before. If so, I will thank any pointer. I have a ClassA that contains a collections of objects of ClassB Object subclass: #ClassA instanceVariableNames: 'list' classVariableNames: '' poolDictionaries: '' category: 'Test' ClassA >> list ^ list ifNil: [ list := OrderedCollection new ] Object subclass: #ClassB instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'Test' ClassA can add and remove objects of ClassB at any time. When a ClassB object is removed from ClassA, the object is not needed anymore so, as nobody else references it, the Garbage Collector dispose it. That is ok, and the intended behavior. Now, after a time, a new class named Group was created, to manage lists of objects of classB, imagine a kind of bookmark. Object subclass: #Group instanceVariableNames: 'list' classVariableNames: '' poolDictionaries: '' category: 'Test' Group >> list ^ list ifNil: [ list := OrderedCollection new ] This class needs to work the following way: - I can add and remove objects of ClassB to a Group any time. - When an object of ClassB is added to a Group, there are 2 references to the object. - When an object of ClassB is removed from Group, the reference to ClassB object from Group is removed and now only ClassA has a reference to the object. But: - If I remove the object from ClassA, the object must also be removed from Group, because the Group can only reference objects of ClassB that are actually part of a ClassA object. I think that this behavior can be achieved the following way: When deleting an object of ClassB from an object of ClassA, all the Groups must be scanned to search for ocurrences of the object of ClassA and remove it from Group and then remove it from ClassA This has the following drawbacks: - is not atomic, must remove from 2 places to succed - is slow if there a lot of object in each group - is, appears to me, not elegant. I can also add a reference in each ClassA object to its ClassA parent and a list of references to the groups the object is part of. This is even trickier, because you now must update both the ClassA and the ClassB each time you associate an object with another. The question is. When you have an object that is referenced from many places, but only one of them is the correct according to the problem domain, how do you manage the adding, removing and updating of the object to the other interested? Is there a guideline here? Thanks for the advise, Miguel Cobá

3 2

Switching windows.
by Paul DeBruicker 18 Apr '09

18 Apr '09

Hi In Mac OSX you can type Command-~ to switch between windows in the current application. Is there a key chord in Squeak or Pharo that does the same thing? I'm using Ubuntu right now and haven't been able to find any chords that do what I'd like. It may be an OS issue, so I apologize if so. I'd like to be able to flip between a few windows as I learn how to do things in Smalltalk. Thanks for any pointers you can provide. Paul

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Beginners April 2009