Beginners August 2006

beginners@lists.squeakfoundation.org

70 participants
71 discussions

Smaller image why
by Mathieu SUEN 11 Aug '06

11 Aug '06

Hi, I just want to know why the image is smaller from the 7048 and 7051 because only few of class have been removed. Juste by curiosity :) And an other thing is that I have reached the maximum size of the changes set file. What can I do in this situation to avoid to build a new image... Thanks Math

3 4

error trap
by Davide Arrigo 09 Aug '06

09 Aug '06

hi guys, I want to implement an "error trap" in Squeak, something like "on error goto:" in other languages. When a method encounter an error during execution of a block of code (an error like: square root or logarithm of a negative numbers, division by zero and so on..) I want only a message, send to Transcript, without any dialog box ask to me if I want to proceed, stop or debug. I wouldn't halt the program but always proceed automatically with the next block of code evaluation. Is it possible? Thanks in advance. -- --------------- Davide Arrigo

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Embedded smalltalk
by bobvoigt＠comcast.net 08 Aug '06

08 Aug '06

I am wondering if Squeak or any other smalltalk can be used in embedded controllers. Bob Voigt

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Managing squeak windows
by itsme213 08 Aug '06

08 Aug '06

Is there a keyboard shortcut to cycle across windows inside a running squeak (somewhat like alt-tab for Windows)? Any best practices for managing all those windows? Thanks.

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How to accelerate learning of Squeak environment?
by itsme213 08 Aug '06

08 Aug '06

While I am getting comfortable with the basics of developing Smalltalk code in the Squeak environment, I still don't have a good handle on things like change sets, images, versioning (monticello), pool dictionaries, sunit, customizing (even things like keymaps, fonts...) etc. Any good sites / books / other pointers that might help? Thanks.

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RE: [Newbies] Save Command
by Ron Teitelbaum 06 Aug '06

06 Aug '06

Sedar, Very good I'm glad you found it on your own. The method is a very interesting one and worth some comments for newbies. One thing to understand about Smalltalk is that it is always running. This might sound odd but it's true. We use Smalltalk under normal conditions to program Smalltalk. This method of saving an image does something really cool. It only suspends the image, taking a snapshot of the current state, so that it can resume right were it left off. When you think about this method you would assume that it just writes what's there and exits, but notice that this method is also used for start up, since when this method actually exits you have restarted the image. You can think of it as a stop sign in the image that is right in the middle of this method. You stop at the sign: save, and then restart and continue right from the middle to continue. It's very cool! Happy coding! Ron Teitelbaum President / Principal Software Engineer US Medical Record Specialists Ron(a)USMedRec.com _____ From: beginners-bounces(a)lists.squeakfoundation.org [mailto:beginners-bounces@lists.squeakfoundation.org] On Behalf Of Serdar Sahin Sent: Sunday, August 06, 2006 10:52 AM To: 'A friendly place to get answers to even the most basic questionsaboutSqueak.' Subject: RE: [Newbies] Save Command Hi, I have found it on "implementors of it" menu. SmalltalkImage current snapshot: true andQuit: false That command helps.. Serdar, _____ From: beginners-bounces(a)lists.squeakfoundation.org [mailto:beginners-bounces@lists.squeakfoundation.org] On Behalf Of Serdar Şahin Sent: Monday, August 07, 2006 12:43 AM To: Beginners(a)lists.squeakfoundation.org Subject: [Newbies] Save Command Hi Again, Does SmallTalk/Squeak have any "save image" command ? I inspected save button to understand how can it save the image, but i could not find anything. I have found SaveSession command, but it could not save anything. Thanks,

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RE: [Newbies] Save Command
by Serdar Sahin 06 Aug '06

06 Aug '06

Hi, I have found it on "implementors of it" menu. SmalltalkImage current snapshot: true andQuit: false That command helps.. Serdar, _____ From: beginners-bounces(a)lists.squeakfoundation.org [mailto:beginners-bounces@lists.squeakfoundation.org] On Behalf Of Serdar Şahin Sent: Monday, August 07, 2006 12:43 AM To: Beginners(a)lists.squeakfoundation.org Subject: [Newbies] Save Command Hi Again, Does SmallTalk/Squeak have any "save image" command ? I inspected save button to understand how can it save the image, but i could not find anything. I have found SaveSession command, but it could not save anything. Thanks,

1 0

Save Command
by Serdar Şahin 06 Aug '06

06 Aug '06

Hi Again, Does SmallTalk/Squeak have any "save image" command ? I inspected save button to understand how can it save the image, but i could not find anything. I have found SaveSession command, but it could not save anything. Thanks,

1 0

Omnibase (OSProcess undefined)
by ernst 06 Aug '06

06 Aug '06

Have loaded Omnibase from OmniBase-DG.6.mcz (tried also SqueakMap) DoIt: db := OmniBase createOn: 'MyDB' and get a walkback because OSProcess is undefined (see below). Is OSProcess a class or some kind of global variable? How to fix it? Thanks ensureAccessMode: accessMode forFileStream: aFileStream "Check the special byte is appropriately set to allow the desired access mode. Signal a locking conflict if there is a problem. See the class comment for more information on what's going on here." | needsWriteAccess | needsWriteAccess := (accessMode = self accessModeReadOnly) not. (OSProcess accessor isLockableFile: aFileStream from: self shareModeFlagLocation to: self shareModeFlagLocation exclusive: needsWriteAccess) ifFalse: [ODBLockingConflict signal]. -- View this message in context: http://www.nabble.com/Omnibase-%28OSProcess-undefined%29-tf2055921.html#a56… Sent from the Squeak - Beginners forum at Nabble.com.

4 4

About true
by Mathieu 03 Aug '06

03 Aug '06

Hi, I was playing with true: Supposes you inspect 'True basicNew'. It return a new instance of True but the following don't work: True basicNew ifTrue:[true] Strange? I have try to debug it and it fail on basicNew ?? I have inspect a CompiledMethod with this code and I saw: 21 <41> pushLit: True 22 <D0> send: basicNew 23 <98> jumpFalse: 25 24 <79> return: true 25 <78> returnSelf That seems to be correct but at run time it don't do this ?? How come? Thx Math

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Beginners August 2006