Squeak-dev May 2006

squeak-dev@lists.squeakfoundation.org

185 participants
370 discussions

Dan Ingalls Interview online
by Serge Stinckwich 01 May '06

01 May '06

Hi all, i put online an interview of Dan Ingalls done by Nicolas Roard and me during the ESUG 2004 conference, and published by the french Linux Magazine in october 2004. The english version with the french translation are here : http://community.ofset.org/wiki/Interview_de_Dan_Ingalls Have fun, -- oooo Dr. Serge Stinckwich OOOOOOOO Université de Caen>CNRS UMR 6072>GREYC>MAD OOESUGOO http://purl.org/net/SergeStinckwich oooooo Smalltalkers do: [:it | All with: Class, (And love: it)] \ / ##

3 3

Re: 0 or 1 index (was: new Smalltalk programmer's thoughts)
by Laurence Rozier 01 May '06

01 May '06

On 5/1/06, Jecel Assumpcao Jr <jecel(a)merlintec.com> wrote: > > Wolfgang Helbig wrote on Mon, 1 May 2006 14:02:19 +0200 (MEST) > > And that is my point: Different challenges need different numbers for > the first > > index. When I am implementing a Gaussian algorithm to invert matrices, > I'd never > > use 0 as the first index. But whenever I am computing indexes, I'd never > use > > one as the first index. And this is not supported by BASIC and > Smalltalk. > > To be fair, I have used more than one BASIC that allowed you to set > either 0 or 1 as the base index for all arrays in a program. And the > Self dialect of Smalltalk (http://www.merlintec.com:8080/Self/) does > borrow several C conventions including 0 based arrays. > > The current program I am writing in Squeak simulates hardware and 1 > based arrays were a bit inconvenient, so the first thing I did was > define a ZArray class as a subclass of ArrayedCollection with > > at: index > ^ super at: index + 1 > > at: index put: obj > ^ super at: index + 1 put: obj > > do: block > 0 to: self size - 1 do: > [ :index | block value: (self at: index) ] > > and then all I had to do was write the rest of my application naturally > and just remember to use "ZArray new: x" instead of "Array new: x". > Inspecting ZArrays still shows the contents as having indexes starting > with 1, but other than that small confusion (which I could easily fix if > I wanted to) it works just great. There is probably a significant > performance hit but I am not worried about that here. This seems to me to be a good approach. I think Alan Kay said something like "hardware is just software crystallized early". If one accepts that notion then the special needs of hw should properly be subsets of the typical case. Perhaps, when the world is running on Plurion processors, that will come to pass ;-) Laurence -- Jecel > >

1 0

Re: new Smalltalk programmer's thoughts
by Wolfgang Helbig 01 May '06

01 May '06

Hi Hans-Martin, you mentioned: >http://en.wikipedia.org/wiki/Array lists BASIC and Fortran as having >1-based array indexing not any more :-) In Fortran 77 you specify a Real Array with indexes from 0 to 10 as REAL(0:10) This leaves BASIC and Smalltalk on the wikipedia list. Greetings, Wolfgang -- Weniger, aber besser.

4 3

Re: new Smalltalk programmer's thoughts
by Wolfgang Helbig 01 May '06

01 May '06

Hi Hans-Martin, you posed the question >The question is: do we want to let hardware characteristics dominate our >way of thinking? And the answer is no! And I deeply appreciate Smalltalk for the #// and #\\ operators, for Integers that are unlimeted, and for things like garbage collection that no real machine can achieve! Smalltalk leverages on being run by a virtual machine. And it does very well so. Furthermore, it lets you adopt things to your likes much easier than any other language I know. (I don't know Lisp) So, in this respect, I couldn't agree more with you. >collection, I want the first at index 1 and the fifth at index 5. When >I'm using Integers, I don't want to think about 16 vs 32 bits, signed vs >unsigned etc. >The argument about loop bounds is somewhat related. I've seen quite some >beginner's C code which did "for (i=0; i<=10; i++)" to address a >10-element array :-) Seasoned C programmers don't do that anymore, but >it tells me a bit about what is "natural" :-) And that is my point: Different challenges need different numbers for the first index. When I am implementing a Gaussian algorithm to invert matrices, I'd never use 0 as the first index. But whenever I am computing indexes, I'd never use one as the first index. And this is not supported by BASIC and Smalltalk. Greetings, Wolfgang > >Cheers, >Hans-Martin -- Weniger, aber besser.

3 2

http://minnow.cc.gatech.edu/squeak/524 appears to be down
by Thomas Koenig 01 May '06

01 May '06

4 5

OSProcess file locking bug report and fix
by David T. Lewis 01 May '06

01 May '06

OSProcess file locking bug/fix Affected platforms: Squeak applications that rely on file locking for Unix, such as Omnibase applications. Squeak with OSProcess on Unix/Linux using unix file locking with Win32 file lock emulation disabled. The problem does not occur if Win32 file lock emulation is enabled (OSProcessAccessor emulateWin32FileLocking: true). Defect: UnixOSProcessAccessor>>unlockFileRegion: may not unlock a file or file region when Win32 compatibility is disabled (OSProcessAccessor emulateWin32FileLocking: false). Resolution: Change set attached, "OSProcessFileLockPatch-dtl.2.cs". An updated SUnit test that demonstrate the problem is at: http://www.squeaksource.com/OSProcess/Tests-OSProcess-dtl.14.mcz The most recent OSProcess (unreleased), including this patch and a few unrelated updates, is at: http://www.squeaksource.com/OSProcess/OSProcess-dtl.21.mcz If you are not using OSProcess for file locking on a Unix/Linux platform, you should ignore this update. Dave

1 0

(no subject)
by David T. Lewis 01 May '06

01 May '06

1 0

[ANN] 3.9a7025
by Marcus Denker 01 May '06

01 May '06

http://ftp.squeak.org/3.9/Squeak3.9a-7025.zip CHANGELOG: -------------------- Compiler: - Small refactoring of MethodNode>>generate and related methods (needed by MethodWrappers) (Diego Fernandez (and Andrian Lienhard (netstyle.ch)) ) - == <integer literal> to = <integer literal> in response to Dan Ingalls' note (fbs) OmniBrowser: (Lukas Renggli of netstyle.ch) - fixes an bug when the browser is opened (Ctrl+B) from non OmniBrowser windows (Debugger, Workspace, ...) - drag and drop methods and categories onto classes -------------- SUnit: 0003489: ClassTestCase >> selectorsTested misses 'special' methods. The method ClassTestCase >> selectorsTested computes the sent messages in a test incorrectly. It looks in the literals array, and so misses the 32 'special' message selectors. The correct code is both shorter and simpler. (Andrew Black) --------------- Morphic: - 0003416: Faster Moprhic invalidation Morph>>invalidRect:from: was testing for wonderland textures (which where stored in a property...). (Thanks to Andrew Black for reporting this). - Better looking menu title bar (from Thorsten Bergman, if I remember correctly) - some method were lost in 7024 (from etoy-customevents-*). They are back now, fixes lots of bugreports on Mantis. --------------- Change Set: ExternalSettingsReorg-tpr Date: 5 April 2006 Author: tim(a)rowledge.org Reorganise the categories in ExternalSettings to get rid of an explcit '--all--' that can make a real mess of filing out the code -------------- Change Set: KedamaMissing-KR Date: 14 April 2006 Author: Korakurider add missing method for Kedama ---------------- Change Set: KedamaWODepreciated-KR Date: 14 April 2006 Author: Korakurider refactor kedama not to call depreciated methods. note: As showDeprecationWarnings preferece is set to false in Squeakland image, original kedama code run without no problem. ------------------ renamed BlockContext>>endpc to be endOC and fix the one sender (md) ------------------ Change Set: MacRomanFix Date: 5 April 2006 Author: Andreas Raab Raise an error if somebody tries to write wide characters. ---------------------- 0003458: PositionableStream>>copyPreamble:from:at: broken (Andreas Raab) --------- 0003415: Changeset is not updated when renaming a class (Noury Bouraqadi) After renaming a class, the changeset is not updated to refer to the new name. Therefore, one virtually lose recorded changes. The fix also cleans a bit SystemDictionary. It removes method SystemDictionary>>renameClass:from: and uses instead SystemDictionary>>renameClass:as: used by traits ----------- 0003492: Complete the job of changing the way that arrays are printed (Andrew Black) The new array printing logic introduced in 3.9 had some holes, and needed some cleanup. The attached changeset provides it. Tests are included. Specifically, the changeset - marks Fractions as selfEveluating and Booleans as literals - puts Array>>printOn: back in the printing ctaegory, where someone might expect to find it - removes duplicated logic from Collection>>printElementsOn: - adds tests for all of the above. -------------- faster asUTC from Avi Bryant -------------- FixInvisible from Bert Freudenberg

7 8

new Smalltalk programmer's thoughts
by Wolfgang Helbig 01 May '06

01 May '06

Hi list, at http://people.squeakfoundation.org/article/57.html I wrote down my thoughts while learning how to programm in Smalltalk. Greatings, Wolfgang

3 2

(no subject)
by Alan Lovejoy 01 May '06

01 May '06

I am pleased to announce the availability of a port of the Chronos Date/Time Library to Dolphin (Chronos version B1.171, which is now also available for VisualWorks and Squeak.) For more details, please see my blog entry: http://chronos-st.blogspot.com/2006/04/chronos-version-published-for-dolphin .html --Alan

1 0

Jump to page: