Beginners August 2007

beginners@lists.squeakfoundation.org

66 participants
62 discussions

morphic tutorials
by Alex Rice 30 Aug '07

30 Aug '07

3 broken links for Morphic tutorials on this page http://www.squeak.org/Features/MultiMedia/ broken links http://www.squeak.org/tutorials/BankAccount.html Fun with Morphic http://www.squeak.org/tutorials/morphic-tutorial-1.html Morphic for Dummies by Mark Guzdial

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Adapter Pattern in SmallTalk
by KingNothing 29 Aug '07

29 Aug '07

Hi, i'm new to this forum and to smalltalk. I've got to implement now the Adapeter Pattern in SmallTalk. I've got an example in Java that i must translate in SmallTalk. Here there are the Java Classes : ------------------------------------------ public class Glass { /** in 12th of pint */ float content; public Glass() { content=0; } /** */ public void fill(float filling) { content=filling; } public String toString() { return super.toString()+ ", level (12th of pint)="+content; } } ------------------------------- public class Keg { /** content, in 12th of pint units */ float filled; /** absolute level, in pints */ public float getLevel() { return filled/12; } float original; /** in pints */ public float getCapacity() { return original/12; } /** Keg filled with total gallons of beer */ public Keg(float total) { filled=total*8*12; original=filled; } /** creates a Glass filled with quantity/12 pints of beer */ public Glass draw(float quantity) { Glass g=new Glass(); g.fill(quantity); filled-=quantity; return g; } /** % level */ public float getPLevel() { return (100*filled)/original; } public String toString() { return super.toString()+ ", level (%)="+getPLevel()+ ", level (pints)="+getLevel(); } } --------------------------------- public class Fusto { /** rapporto LITRO/PINTA */ public final static float LITRO_PINTA=2.1133f; Keg keg; public Fusto(Keg k) { keg=k; } /** crea un Glass riempito con quant/10 litri di birra */ public Glass spilla(float quant) { return keg.draw(quant*LITRO_PINTA*12/10); } /** in litri, NON in percentuale!!! */ public float fornisciLivello() { return keg.getLevel()/LITRO_PINTA; } /** in percentuale */ public float fornisciPLivello() { return keg.getPLevel(); } public String toString() { return super.toString()+ ", livello (%)="+fornisciPLivello()+ ", livello (litri)="+fornisciLivello(); } } ------------------------------------- Can someone give me some hints to translate java code into SmallTalk ? Thanks in advance. -- View this message in context: http://www.nabble.com/Adapter-Pattern-in-SmallTalk-tf4347089.html#a12384904 Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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system modification attempt (antivirus message)
by Alex Rice 29 Aug '07

29 Aug '07

Hi, i have noticed that when running Squeak.exe or any other Squeak-based apps like Scratch, Sophie, etc. all get trapped by my F-Secure Antivirus for "system modification attempt" when first running the .exe on Windows XP. After being whitelisted, the .exe launches fine. Presumably the app is exec() ing another process, or doing something related to .exe which the AV software considers suspicious. It is something that might be nice to fix on the Windows platform. I have not looked at the Squeak source to see where this is occurring though. Alex Rice

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event buffer overflow
by Ching de la Serna 28 Aug '07

28 Aug '07

Hi list, What does it mean when you get an "Event buffer overflow" message? It appeared as if my Squeak was frozen even though my seaside app was still working. When I attempted to close the window and cancelled, that was when the message appeared. I only have 128 MB RAM and my app was getting kinda hefty. Any ideas? Ching

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The old inisqueak problem on Linux
by Heiko Schroeder 28 Aug '07

28 Aug '07

Dear list, perhaps some of you are aware of this old problem: Installing Squeak 3.9.8 under Linux by description is impossible. - the inisqueak command is missing - the author of the manpage ian pumarta presents a wrong address - a second one can be found in the INSTALL file which is wrong as well I reported this problem more than a year ago several times, but there has been no change up to now. It is a pity, since Squeak is that splendid. Regards Heiko -- Heiko Schroeder Praha, Ceska Republica http://home.foni.net/~heikos http://www.od.shuttle.de/evb-1

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How can I load the RefactoringBrowser into Squeak 3.9?
by Ravi Mohan 27 Aug '07

27 Aug '07

Hi, I have worked with Visual Works smalltalk before, but I am new to squeak. I want to install the Refactoring Browser on my newly installed Squeak 3.9 (on Ubuntu Feisty if that matters) and can't figure out how. The World Menu -> Open -> Squeak Package Loader, where there are several refactoring browsers but nothing for 3.9. There is a "Refactoring Engine" . Its explanatory text says "This is the Refactoring Engine. (It's the Refactoring Browser without the Browser and AST)." huh ? what does "Refactoring Browser without the Browser" mean? One more question, I'll probably explore the squeak library by adding unit tests for various classes. Is there a process by which I can submit these tests as a patch? Sorry if this question ("How do I submit a patch" has been addressed before, but I couldn't find it anywhere. Thanks in advance, Ravi ____________________________________________________________________________________ Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting

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Re: Prompter Class
by Jerome Peace 25 Aug '07

25 Aug '07

[Newbies] Prompter Class Try: FillInTheBlank request: 'Something to prioritize? ' Browse class for more details. Hth. Yours in service and curiosity, --Jerome Peace *** > >phiroc at free.fr phiroc at free.fr >Wed Aug 22 12:43:09 UTC 2007 > >Hello, > >I am currently going through the Dispatcher Tutorial in Dan Shafer and Dean A. >Ritz's "Practical SmallTalk". > >On page 32, they suggest creating a Prompter in a Workspace, as follows: > >| anotherItem | >anotherItem := Prompter prompt: > 'Something to prioritize? ' > default: '' . > ^ anotherItem > >The only problem is that the Prompter Class does not exist in Squeak or bears >a >different name. Could someone please tell me what Squeak's equivalent to the >Smalltalk/V Prompter class is? > >Here's the authors' definition of the Smalltalk/V Prompter Class: > >"A Smalltalk/V Prompter is a small window with one TextPane that poses a >question to the user in its top line, or header area, and allows the user to >type in an answer in the bottom". > >Many thanks. > >phiroc > *** ____________________________________________________________________________________ Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. http://mobile.yahoo.com/go?refer=1GNXIC

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Linux Ubuntu 7.04 issue
by Blake 24 Aug '07

24 Aug '07

Hey, all, I've just set my son up with an Ubuntu system and every now and again, when he minimizes his class browser, they are, em, featureless(?) on restore. All the panes are gone. Anyone else seen such a thing? ===Blake===

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Block other processes?
by John Almberg 22 Aug '07

22 Aug '07

I'm trying to use Squeak to time an external process via a Socket Connection. I've got it working, but I'm suddenly wondering if the variation in timing is more due to internal delays in Squeak, than changes on the target system. For example, if the Squeak garbage collector runs while the timing loop is running, that could throw off the measurement. Is there any way to block the execution of other processes while in the timing loop? -- John

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Fwd: Prompter Class
by phiroc＠free.fr 22 Aug '07

22 Aug '07

Hello, I found the answer to my own question: the class is called FillInTheBlank. ----- Forwarded message from phiroc(a)free.fr ----- Date: Wed, 22 Aug 2007 14:43:09 +0200 From: phiroc(a)free.fr Reply-To: phiroc(a)free.fr Subject: Prompter Class To: beginners(a)lists.squeakfoundation.org Hello, I am currently going through the Dispatcher Tutorial in Dan Shafer and Dean A. Ritz's "Practical SmallTalk". On page 32, they suggest creating a Prompter in a Workspace, as follows: | anotherItem | anotherItem := Prompter prompt: 'Something to prioritize? ' default: '' . ^ anotherItem The only problem is that the Prompter Class does not exist in Squeak or bears a different name. Could someone please tell me what Squeak's equivalent to the Smalltalk/V Prompter class is? Here's the authors' definition of the Smalltalk/V Prompter Class: "A Smalltalk/V Prompter is a small window with one TextPane that poses a question to the user in its top line, or header area, and allows the user to type in an answer in the bottom". Many thanks. phiroc ----- End forwarded message -----

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Beginners August 2007