Beginners May 2008

beginners@lists.squeakfoundation.org

54 participants
58 discussions

Mac OS X... proper installation?
by Aaron Broad 25 May '08

25 May '08

Hi, I'm new to smalltalk/squeak. Trying to learn seaside. I want to use the web development image but i can't seem to get it to work. I have mac os x leopard on macbook pro. I have tried the following each with failure: * I installed squeak via darwin ports but it just hangs if i try to load the web image using the following squeak -vm-display-Quartz sq3webdev.image *I downloaded and installed the MacOSX universal app from squeak homepage. It will load the web dev image but has visual errors i'm guessing from wrong version incompatibilities?? there are text artifacts and errors throughout So my question is how does everyone else install on mac os x. I'm a beginner at squeak but not computer science/unix/etc. I'm looking to install it the proper way and in a way where i can choose which image gets loaded at the start, because I started learning seaside with the oneclick installer but i messed up that image to the point where it crashes 5 seconds after loading. Unfortunately this is halfway through the todoapp tutorial, so i have to start it over when i do get it working. thanks, Aaron

3 6

Determining the sender in a method
by Rob Rothwell 25 May '08

25 May '08

Is there a way to determine "who" called "me" in a method? Or would doing this just be bad form? I have a method in an object that creates another object FOR the sender. Rather than pass a parameter, it seemed like it would be nice to just "know" who was asking for the component. For example, rather than MyObject>>doSomething WidgetBuilderSubclass buildComponentForObject: self anObject. it would be nice to just MyObject>>doSomething WidgetBuilderSubclass buildComponent and have WidgetBuilderSubclass>>buildComponent | obj widget | obj := self thisMessageSender anObject. ... ^widget I am probably asking a question that shows just how much I don't understand "the Smalltalk way!" Thanks, Rob

2 2

Sound
by Jeffery Billing 25 May '08

25 May '08

I am trying to use the 'sound' widget. I get an error 'primitive has failed' Where do I go from here? I am using Ubuntu 8.04 and can use recording and play in 'Praat speech analyser' so my sound system is working in Ubuntu but can't get any sound in Squeak. The Movie Player also fails. I am using Squeak 3.9.

1 0

Re: [Newbies] SAR Files
by jeffery.billing＠bigpond.com 25 May '08

25 May '08

Edgar I would like to thank you and Bob for your help. I followed instructions and everything worked perfectly (So easy when you know how!!) Edgar I will save your e-mail for future perusal as I am sure that it will be of great help as I travel further down the 'Squeak Path'. Thanks again Jeff Billing ---- "Edgar J. De Cleene" <edgardec2001(a)yahoo.com.ar> wrote: > > > > El 5/23/08 10:00 PM, "Rob Rothwell" <r.j.rothwell(a)gmail.com> escribió: > > > I *think* if you open a file list with the World Menu->open->file list and > > browse to your SAR file, an "install" button will appear in the file list. > > > > Just press the button, and hopefully everything will work! > > > > Rob > > > And you could drag and drop into any Squeak 3.8 and newer. > A menu like this shows. > > The .sar files is like smart install, you could control different actions > for different squeaks, made your dream about which packages and which > versions, add complementary files like .jpg,.gif,.png or .wav, you named. > > You could find small ones and big and complex ones and trust me its the only > way you become your own Master and survive the raising number of Squeak > versions. > > If the .sar have "preamble", all this code is executed first. > Then all code files ,st .cs, .mcz, etc, was loaded in order (if in preamble > you don't have some different. > And if you have a "postscript", this code is executed last. > > > Here you have a puzzle. > http://wiki.squeak.org/squeak/5861 > > I have variants in the preamble like this > > | misFotos listaArchivos member form str | > Smalltalk version = 'SqueakLight' ifTrue:[ self fileInMemberNamed: > 'MixedCurves.2.cs'. > self fileInMemberNamed: 'MinimalSound.2.cs']. > > self fileInMemberNamed: 'Morphic-Puzzle.47.cs'. > > member _ self memberNamed: 'CatClubBallooning.jpg'. > PuzzleMorph foto: (Form fromBinaryStream: member contentStream binary). > member _ self memberNamed: 'Taunt011.wav'. > PuzzleMorph sonido: (member contentStream binary). > PuzzleMorph allPieces > > > So I develop in my own develop image, with all my tools and then made a .sar > and could run into my SqueakLight of 3.7 mb, close and give a RTS (Run Time > System) if I don't wish client knows is made in Squeak. > > Off course , you could do any serious and not only fun... > >

1 0

Remove old instances of a Class
by Rob Rothwell 24 May '08

24 May '08

How can I remove old instances of class that have been created while playing around in a Workspace? I am developing some code that needs to go through and deal with allInstances of itself, and I just seem to have old versions hanging around that don't seem to be getting garbageCollected. Furthermore, I am expecting certain types of objects in some of their instance variables, and as I have changed my code, these objects have changed--but not in these "obsolete" objects, so I have had to manually go into those instances and "fix them up" so that my allInstancesDo loop would work! I have tried closing the Workspace, followed by Smalltalk garbageCollectMost, but to no effect. Thanks, Rob

1 0

Collapsed window alwas goes to upper left
by Adrian Schmitt 24 May '08

24 May '08

Hi, each time I save my image the collapsed monticello window bar goes to the upper left. How can I switch off this behaviour? I'd like move it somewhere and stay there. I remember it had this behaviour little time ago, but don't know why and how it changed. I made this window "unclosable" which is what I want. I also selected "make next-to-topmost", I thought this would permanently put the monticello window over other windows that don't have this set. Am I right at this point? Does this maybe provoke the "moving automatically to upper left" behaviour? Thank you Adrian

2 1

fromString: method
by Davide Arrigo 24 May '08

24 May '08

Hy all, I worder if there's something like this: Block fromString: aString in Squeak, like the example below taken from SmallTalk/X programmers guide. |s b| s := '[:a :b | (a squared + b squared) sqrt ]'. b := (Block fromString:s). Transcript showCR:(b value:3 value:4) I need to get a Block of code from an input field like TextMorph in a GUI. I haven't found nothing like this in my squeak-dev image 3.10. Is there another way to obtain am evaluable Block of code from a string? Many thanks -- -------------------------- Davide Arrigo

2 2

Setting up a dependency mechanism in Squeak
by David Finlayson 24 May '08

24 May '08

In the Art and Science of Smalltalk by Simon Lewis, there is a lengthy discussion of Smalltalk's dependency mechanism (yourObject addDependent: myObject; myObject changed, etc.) . A few of the examples of Morphic (Squeak by Example, Squeak: Object Oriented Design with Multimedia Applications) show examples sending the "changed" message which I assume triggers a dependency update the same as or similar to the dependency mechanism described by Lewis. But the examples are too trivial to see this through completely. Is this still the way to set up a many-to-one dependency relationship between objects in Squeak? My program is pretty simple: I am creating a navigation display for a boat. The boat's position and other interesting variables are transmitted to the program via UDP packets over the network and these are visualized in the user-interface by a set of widgets (which the pilot can pick from and move around). I plan on having a master object that contains the latest information from the various UDP packets and I want the widgets to depend on the master, so that when (for example) the position of the boat is updated, the little widget representing the boat moves appropriately. All of this is obviously do-able (and not too different than Etoys), but I'm still learning how to set it up in Squeak. Thanks for any advise. David

3 3

reading from named pipes
by Chris Dawson 23 May '08

23 May '08

Hi there, I'm trying to read from a named pipe. I'm on Linux (Ubuntu 8.04). - I created the pipe using mkfifo - I can write to it, and when I cat the pipe within another terminal I see the output. - I've tried using various combinations of FileStream, OSProcess-ExternalPipe and OSProcess-AsyncFileReadStream. - For example, I used this code: pipe := OSPipe new. file := FileStream fileNamed: '/my/named/pipe'. pipe reader: file. foo := pipe upToEndOfFile. It just hangs when I do this. Any suggestions? Chris

3 2

[ANN] SwaLint
by Tobias Pape 22 May '08

22 May '08

Dear Squeak community, we would like to announce the first release of SwaLint. SwaLint is a Squeak source code linting tool in the spirit of (C) Lint or SmallLint. It is intended as a developer aid to * test source code for stylistic coherence and * identify possible errors. It has been developed by Johannes Dyck, Christoph Neijenhuis, Tobias Pape, Nico Rehwaldt, and Arian Treffer during a course on software engineering held by the Software Architecture Group at the HPI, Potsdam, Germany. SwaLint is available from SqueakMap. Documentation can be found at http://swalint.netshed.de/. Tobias Pape on behalf of the SwaLint team

1 0

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

Beginners May 2008