Squeak-dev June 2006

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Learning Smalltalk on the web
by stéphane ducasse 03 Jun '06

03 Jun '06

> http://tryruby.hobix.com/ > does anybody want to do the same for Squeak ? Stef

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Win32 replacement shell recommendations
by Bill Schwab 03 Jun '06

03 Jun '06

Hello all, As this is hardly a mainstream forum, it seems reasonable to check here for recommendations. My goal is to simply and easily lock down winxp and 2k machines w/o really locking them down. IMHO, the most attractive approach is to change the shell to something that feigns ignorance of IE, Outlook, etc. In exchange for never having to wonder what new shortcuts have been added to this or that part of the main menu, I would gladly make a separate explicit menu that is presented to end users. Beyond that, I would want an additionally password-protected way to get to a command line and hopefully explorer itself. Do any of you have experience with shell replacements? There are many of them available, though most appear to be in some level of distress. LiteStep (open) and Aston (commercial) both replace enough of explorer that they require the machine to be locked down via standard methods. Options I am considering include: (1) hack LiteStep to limit choices; (2) build a shell in Dolphin or Squeak. Dolphin has the edge on Winows integration (arguably important for a shell), but Squeak has a readily tweaked VM which might be of value. A third option is to spend lots of time hassling with policies, but I have very little faith in that, as the machines I have seen "locked down" by such methods have IE readily accessible and willing to run ActiveX controls that are marked as safe for scripting (which is a complete joke IMHO). Any ideas? Bill Wilhelm K. Schwab, Ph.D. University of Florida Department of Anesthesiology PO Box 100254 Gainesville, FL 32610-0254 Email: bills(a)anest4.anest.ufl.edu Tel: (352) 846-1285 FAX: (352) 392-7029

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printStringRadix: what should it produce?
by David Shaffer 03 Jun '06

03 Jun '06

Gnu Smalltalk 2.1.12: 39 printStringRadix: 11 ===> 11r36 VisualWorks 7.3.1 39 printStringRadix: 11 ===> 36 Squeak 3.7 39 printStringRadix: 11 ===> 11r36 Squeak 3.8 and 3.9beta 39 printStringRadix: 11 ===> 36 If we've moved permanently to the the VW-compatible version (no radix prefix) then several classes in the base image need to be fixed (most importantly for me UUID>>asString36 but there are others that assume the radix prefix). I'll post fixes to mantis unless some one pipes up with "no we're going to go back to the old way." David

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Re: Hobbes Emulator licensed
by Wolfgang Helbig 03 Jun '06

03 Jun '06

Stephane, you want: >Cool. I really want to have a look (argh....time time time is going >to fast or I'm doing too much stuff) >Then where is hobbes :) Inside a Squeak 3.6 image I've got from Dan when I asked him for the fonts used in Smalltalk-80. I do not have access to the original Hobbes Emulator as programmed by Vassily for Visual Works. If authorized by Dan, I'd put the sources of his port of Hobbes on my web site. But I'd prefer Dan to put it on his site or better yet on some of Squeak's repository. Since the V2-image from Xerox PARC is not published, and probably never will, Hobbes is of limited value only. At least to me. Greetings Wolfgang -- Weniger, aber besser.

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SqueakSource seems down argh....
by stéphane ducasse 03 Jun '06

03 Jun '06

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Profile help needed
by Cowdery, Bob [UK] 03 Jun '06

03 Jun '06

Is there anyone can give me some help with profiling. I have a composite morph where I can scroll a 9 digit frequency up and down with the mouse wheel. Now, maybe I implemented it badly but when I scroll fast it take oodles of CPU. I used TimeProfileBrowser and just kicked the right method but I'm not sure what it's telling me except a lot is going on. Also how do I extract the data from that browser to post? Thanks Bob *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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(no subject)
by Stéphane Ducasse 03 Jun '06

03 Jun '06

> http://tryruby.hobix.com/ does anybody want to do the same for Squeak ? Stef

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Hobbes Emulator licensed
by Wolfgang Helbig 03 Jun '06

03 Jun '06

List, Vassily Bykov kindly put his Hobbes Emulator under this license: http://creativecommons.org/licenses/by-nc-sa/2.5/ Thank you, Vassily! This license does not cover the ST-80 V2 image, since Xerox holds the copyright to the image. As Vassily pointed out, the emulator also works with the "Apple Smalltalk image", whatever and whereever this is. Greetings, Wolfgang -- Weniger, aber besser.

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Spoon progress 23 May 2006: finding dependencies via passive imprinting
by Craig Latta 03 Jun '06

03 Jun '06

Hi-- Recently I made a module for installing ClassBuilder. (Conveniently, Spoon doesn't need ClassBuilder to install new classes, only to change old ones.) My first test was to add an instance variable to a class in a minimal remote memory. The newly-installed remote ClassBuilder itself behaved fine, but there were a few methods in the remote test class that needed to be recompiled. The minimal memory has no compiler, so that had to be swapped in from the control memory (which also has the GUI and tools I use to run the tests). Installing classes and methods into a minimal remote memory, inline as they are needed, is what I call "passive imprinting". "Active imprinting" is installing behavior in a minimal remote memory as a side-effect of running it locally where it already exists. I suggested in a previous report that only active imprinting is accurate, because a memory requesting methods for itself has no was to know if a method it can already run successfully actually has an override. The situation seems to have changed with the advent of the "method placeholders" I mentioned previously[1]. There are already placeholders in the current minimal memory for each method that hasn't been run since a certain point in time (the beginning of the most recent shrink), but whose class is still referred to by something (classes which have no references are simply removed entirely). As long as placeholders are installed for each overriden method when a new class is defined, passive imprinting now works with full accuracy. Anyway, since the minimal memory also has no source code at the moment, the method recompilation involved in my ClassBuilder test also needed the decompiler. I have the control memory set to mention the classes and methods it installs on the transcript. During the automatic installation of the decompiler, I noticed that DialogStream was getting installed, and, in turn, so was TextStream, Text, Form, Bitmap... These were things that didn't seem absolutely necessary for decompilation. I simply halted the test, noted the point at which unwanted dependencies were being invoked (MethodNode>>decompileString, which had also just been installed), and changed the offending method so that it didn't invoke the first unwanted prerequisite (DialogStream). This seems like a great way to find the dependencies between subsystems in Squeak! The advantage that this technique has over one using active imprinting is speed. With active imprinting, one must probe the remote target memory after every single local message-send, whereas in the passive case the target memory just runs methods without pause until it comes to a placeholder. A workflow for finding dependencies and using them to inform module creation is beginning to appear. It seems we mostly need to come up with a bunch of desired test cases, and the time to run them and watch for undesired relationships. And this whole project is starting to feel like a PhD I should be pursuing somewhere. :) -C [1] http://lists.squeakfoundation.org/pipermail/spoon/2006-April/000107.html -- Craig Latta improvisational musical informaticist www.netjam.org Smalltalkers do: [:it | All with: Class, (And love: it)]

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Squeak Browser plugin source and arch
by Brad Fuller 03 Jun '06

03 Jun '06

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