Beginners August 2006

beginners@lists.squeakfoundation.org

70 participants
71 discussions

Start up processes
by Steve Moffitt 15 Aug '06

15 Aug '06

Hi all -- my image after coming up is taking about 30 seconds before responding to any kind of input ( mouse click ) where can I look at where startup items are kept.I'm using 3.86665 image on Mac OSX with unix 3-7-7 VM. Thanks in advance. Steve

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Re: Instance Creation Howto
by Thiyagarajan 14 Aug '06

14 Aug '06

hello aComplex := ComplexClass new. and create a method "new" which override new new ^ super new initializer and create a another method "initializer" initializer | aVariable | aVariable := ComplexClass new. aVariable firstVariable: 22. aVariable secondVariable: 23. ^aVariable > > ------------------------------ > > Message: 10 > Date: Sun, 13 Aug 2006 23:23:43 +0200 > From: hypolit <hypolit(a)googlemail.com> > Subject: [Newbies] Instance Creation Howto > To: beginners(a)lists.squeakfoundation.org > Message-ID: > <e4dc659c0608131423pfd5ecbak97309d93234a0261(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Hello, > > I am new to Smalltalk and Squeak in general. After having started to read > "Inside Smalltalk" and "Smalltalk by Example" i came along two similar > examples, which sound quite reasonable but don't seem to work in Squeak. > I want to create an instance of my own class "ComplexClass". > > It is defined like this: > Object subclass: #ComplexClass > instanceVariableNames: 'firstVar secondVar' > classVariableNames: '' > poolDictionaries: '' > category: 'TestClass' > > > I can create instances with > aComplex := ComplexClass new. > normally. > > But what if i wanted to call another method instead of "new" to create an > instance? > Take, for example, my method "initializer": > > initializer > | aVariable | > aVariable := ComplexClass new. > aVariable firstVariable: 22. > aVariable secondVariable: 23. > ^aVariable > > > In both books there are methods quite similar to my "initializer" method. > But if execute: > > aComplex2 := ComplexClass initializer. > > I get an error message, something like "Undefined Object does not > understand > #initializer". > Do i have to write: > > aComplex2 := ComplexClass new. > aComplex2 := aComplex2 initalizer. > > That would work but it is quite ugly.

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PGP Encrypting & Squeak VM
by Matt Eisenberg 14 Aug '06

14 Aug '06

Hi guys, A little background: My work laptop has this really cool PGP whole-disk encryption software on it. The entire hard drive is encrypted, so that if my laptop is stolen, all of the data is safe. When the machine boots, I enter a passphrase which, I believe, enables the replaced hard disk driver to read the encrypted disk. Wouldn't it be cool to have this sort of functionality built into the Squeak VM? Once could encrypt their image file once and then it is only available after entering the correct passphrase. Sorry, maybe that's not making a whole lot of sense, but I'm excited about the idea of carting my image around on usb drive and not having to worry about shredding it off of any computer I use. matt.

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HTTPSocket>>argString:args
by ernst 14 Aug '06

14 Aug '06

Is there a bug in this method? An association in the args dictionary will contain the name of a prameter and its value as a string. The iteration assoc value do: [ :value | will operate on characters of the value which I think is not intended. .... args associationsDo: [ :assoc | assoc value do: [ :value | first ifTrue: [ first := false ] ifFalse: [ argsString nextPut: $& ]. argsString nextPutAll: assoc key encodeForHTTP. argsString nextPut: $=. argsString nextPutAll: value encodeForHTTP. ] ]. should be? .... args associationsDo: [ :assoc | first ifTrue: [ first := false ] ifFalse: [ argsString nextPut: $& ]. argsString nextPutAll: assoc key encodeForHTTP. argsString nextPut: $=. argsString nextPutAll: assoc value encodeForHTTP ]. -- View this message in context: http://www.nabble.com/HTTPSocket%3E%3EargString%3Aargs-tf2102777.html#a5794… Sent from the Squeak - Beginners forum at Nabble.com.

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error trap
by Davide Arrigo 14 Aug '06

14 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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Instance Creation Howto
by hypolit 13 Aug '06

13 Aug '06

Hello, I am new to Smalltalk and Squeak in general. After having started to read "Inside Smalltalk" and "Smalltalk by Example" i came along two similar examples, which sound quite reasonable but don't seem to work in Squeak. I want to create an instance of my own class "ComplexClass". It is defined like this: Object subclass: #ComplexClass instanceVariableNames: 'firstVar secondVar' classVariableNames: '' poolDictionaries: '' category: 'TestClass' I can create instances with aComplex := ComplexClass new. normally. But what if i wanted to call another method instead of "new" to create an instance? Take, for example, my method "initializer": initializer | aVariable | aVariable := ComplexClass new. aVariable firstVariable: 22. aVariable secondVariable: 23. ^aVariable In both books there are methods quite similar to my "initializer" method. But if execute: aComplex2 := ComplexClass initializer. I get an error message, something like "Undefined Object does not understand #initializer". Do i have to write: aComplex2 := ComplexClass new. aComplex2 := aComplex2 initalizer. That would work but it is quite ugly.

2 3

remove syntax highlighting
by Chris Kassopulo 13 Aug '06

13 Aug '06

Greetings, I've been away from Squeak for a while, but I'm back. I installed a package from Squeakmap called LogicGate. The code from the package contains syntax highlighting and the indentation is bizarre. An .st source file from the authors web site has correct indentation but it still contains syntax highlighting. I am using Squeak 3.9-5073 and I find no other code that is highlighted. I don't see a way to enable or disable it. I tried deleting the lines containing "style" from the source file, but that broke it. How can I make it go away? Chris

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Packages and dependencies (squeakmap and monticello)
by itsme213 13 Aug '06

13 Aug '06

I am a bit surprised that packages in squeakmap (and monticello?) do not seem to be aware of package dependencies. There may be historical or technical reasons for this, but for someone coming from Ruby I really miss the equivalent of Ruby's "gem" package system: gem install foobar will inspect meta-data on the foobar package, and then locate and install any required packages as well if they are not present already, before installing foobar. It is also version aware. Is there a way to do this with squeak packages? Some specific reason for not doing this? Thanks.

3 4

Shrinking image
by Sergio Gianatiempo 13 Aug '06

13 Aug '06

Hi ppl! i wish to know how can i make my image a smaller, looking arround i tried Smalltalk majorShrinkbut it doesnt work anymore... what can i do? what im looking for is the smallest image able to load an run seaside and scriptaculous. any idea? any chunck of code maybe? Thank you! -- Sergio Gianatiempo

2 1

no available update servers
by Thomas Keller 11 Aug '06

11 Aug '06

Greetings, Whenever I launch Squeak (v3.8#6665) it asks if I want to check for updates. When I click "Yes" however, I always get the message the no update servers are available. Is there a configuration object that I need to provide with server locations? Thanks -- Tom "Ecrasez l'Infame!" -- Voltaire

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Beginners August 2006