Squeak-dev April 2006

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177 participants
262 discussions

SqF board report for April 06
by tim Rowledge 29 Apr '06

29 Apr '06

It took us a little longer to assemble, discuss and produce than anticipated but if we want a reasonably worldwide representation on the board we have to accept some communication costs. However after all that, we hereby proudly present our report for you perusal. SqF Board Report April 06 --------------------------------- The elections are over and the new board has been formed and started working. As always, progress is not as fast as first imagined, but we think we are on a good track to get the Foundation working for the benefit of the community. For anyone who missed the results the elected board is:- Cees de Groot Marcus Denker Stephane Ducasse Bert Freudenberg Craig Latta Yoshiki Ohshima Tim Rowledge as detailed on http://tinyurl.com/gp4yz Responsibilities ------------------- After the elections, we distributed the responsibilities among the Squeak Foundation board Members Here is the current list: http://www.squeak.org/Community/Teams/ If you have questions about a particular topic, don't hesitate to contact the responsible board member. Setting up an Organization ---------------------------------- We agreed to ask ESUG to maintain our money for now. This is the simplest way to operate until we really sort out a legal body of our own. A very interesting possibility we are exploring is to work with the Software Freedom Conservancy http:// conservancy.softwarefreedom.org/ (Thanks to Ron Teitelbaum for this interesting contact!). Squeak Licencing ---------------------- As everyone who's subscribed to the squeak-dev list knows, it's impossible to not discuss licensing on a list that's about squeak... so we inaugurated the list with our own License discussion (phew... now it can rest for some time ;-)). The only thing we can say for now is that there is new activity around licensing and we will report more as soon as we can. Misc ----- - We've agreed to try to centralize the resources, that is, all important services and servers will be migrated to the SqF hardware. (a suddenly disappearing updates server again showed how important this is!) - we provided a simple 'about Squeak' project to go into the new Croquet release - Contacted Google wrt. to Google Summer of Code 06, we have been rejected (Application was too late) - Started to discuss with ESUG about doing our own (small) Summer of Code event. - and as most people will have noticed we are currently involved in trying to work out a good way to provide newcomer support and education Next Steps ------------- The most important next steps are: -> Set up a website for SqF -> Form a formal organisation -> Make sure several board members have the assorted keys to access servers etc. in case of problems, illness, war, plague, acts of Dog, etc. Many thanks to Marcus for putting together the first version of this report. tim -- tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim Useful random insult:- Has a pulse, but that's about all.

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Fun with Number readFrom: What should we do ?
by nicolas cellier 28 Apr '06

28 Apr '06

Hello all, i noticed that Number readFrom: silently answers 0 when it does not encounter some digits: Number readFrom: '' readStream. Number readFrom: 'foo-bar' readStream. Number readFrom: '.' readStream. will all answer 0. Well, i believe there must have been discussions whether or not raising an exception in this case, at least recently in vw list. But let us say that answering 0 is a feature. Then try: Number readFrom: 'rules are made for the others' readStream. fail with an error: 'Invalid radix'. Well, well, don't tell me it is a feature. And just for fun, this one: Number readFrom: '.e' readStream. ah, another feature UndefinedObject doesNotUnderstand: #digitValue. Still want to play ? Try this one: Number readFrom: '--1' readStream. Amazing what we can do with just one readFrom:... Funny, it also accept some un-Smalltalk-ish syntax: Number readFrom: '.1e2'. Number readFrom: '1.e1'. will answer a Float (10.0 like FORTRAN). I suppose this one is intentionnaly a feature. I will not analyze here the cases when the stream advance, and the cases when it does not... That would be boring... Now i am trying to implement Float readFrom without accumulating rounding errors, and this can be the right time for deciding about these cases. What do you vote for ? exception, answering 0, any other idea ? What to do with the stream in case of error ? rewind, keep in place ? I'am waiting for your comments. Nicolas

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[ANN] UbiquiTalk: UBQUITous computing in smallTALK
by Michaël Piel 28 Apr '06

28 Apr '06

Hi, UbiquiTalk is an open P2P platform that supports automatic peer discovery without requiring any infrastructure. Hence, UbiquiTalk can be used either within a network infrastructure or an adhoc network (e.g. Wifi). Each UbiquiTalk peer, named "host", can act either as a service provider or as a client or both. Users are provided an administration graphical interface to customize their respective hosts, and choose to export or import some services or none. The client part of UbiquiTalk GUI allows user to watch host detection and disparition. Moreover, it allows users to use some service provided by a particular host. Currently, we have two GUIs one for PDAs and the other for laptops and desktop computers. UbiquiTalk has been implemented on top of Squeak. It relies on rST (Remote Smalltalk) for remote message sending. Regarding host discovery, We used IP Group Multicast. Therefore, UbiquiTalk can be used through the Internet. UbiquiTalk is freely available for download on: http://csl.ensm-douai.fr/UbiquiTalk http://www.squeaksource.com/UbiquiTalk.html Noury and Michaël

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[ANN] Boot strapping classes
by Noury Bouraqadi 28 Apr '06

28 Apr '06

Hi, For building MetaclassTalk and its explicit metaclass kernel, I had to boot strap a class, i.e. make it instance of it self. For this purpose, I made the BootStrappedClasses package. It supports saving/loading bootstrapped classes from Montciello. http://www.squeaksource.com/BootStrappedClasses.html Noury -------------------------------------------------------------- Dr. Noury Bouraqadi - Enseignant/Chercheur Ecole des Mines de Douai - Dept. G.I.P http://csl.ensm-douai.fr/noury European Smalltalk Users Group Board http://www.esug.org Squeak: an Open Source Smalltalk http://www.squeak.org --------------------------------------------------------------

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[ANN] MetaclassTalk is back
by Noury Bouraqadi 28 Apr '06

28 Apr '06

Hi, MetaclassTalk is a reflective extension of Smalltalk that provides programmers with a a meta-object protocol (MOP) to control objects structure (memory allocation and access to instance variables) and behavior (message sends and receptions and method lookup and evaluation). It aims easing experiments of new concepts, programming pradigms and langage extensions. I (at last) started porting it on a recent version of Squeak (3.9). The port is still unfinished. However, you can use explicit metaclasses. Note that Monticello support for explicit metaclasses is also provides. Explicit metaclasses can be safely stored and retreived from Monticello repositories. http://csl.ensm-douai.fr/MetaclassTalk http://www.squeaksource.com/MetaclassTalk.html Noury -------------------------------------------------------------- Dr. Noury Bouraqadi - Enseignant/Chercheur Ecole des Mines de Douai - Dept. G.I.P http://csl.ensm-douai.fr/noury European Smalltalk Users Group Board http://www.esug.org Squeak: an Open Source Smalltalk http://www.squeak.org -------------------------------------------------------------- -------------------------------------------------------------- Dr. Noury Bouraqadi - Enseignant/Chercheur Ecole des Mines de Douai - Dept. G.I.P http://csl.ensm-douai.fr/noury European Smalltalk Users Group Board http://www.esug.org Squeak: an Open Source Smalltalk http://www.squeak.org --------------------------------------------------------------

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Squeak forth and Logo
by Francisco Garau 28 Apr '06

28 Apr '06

I am having fun with dates, and I can build them with the following expression: 2006 year april dayNumber: 30 I don't like the keyword selector there, because it breaks the beauty of the expression and forces parenthesis afterwards. It would be nicer if I could write: 2006 year april 30 It would never had occurred to me that numbers *could* be selectors if I hadn't taken a look at Forth. In that amazing little language *anything* can be a selector (eg. #?! or ^%* are valid selectors or word names, as they call them). As a comprise, I decided to use the following expression: 2006 year april day30 But that leaves me with another problem. Basically defining 31 methods like this: TmActualMonth>>day30 ^ self dayNumber: 30 Very boring. In the very Logo way, I created a method that creates those boring methods: TmActualMonth class>>installBoringMethods (1 to: 31) collect: [:number | self fakeCompile: (String streamContents: [:stream | stream nextPutAll: 'day'; print: number; cr; tab; nextPutAll: '^ self dayNumber: '; print: number ] ) ] Now I have to rush to our first UK Smalltalk meeting. Stephen Taylor from APL fame will be giving a presentation. It seems that there are lots of similarities between the APL and the Smalltalk community. But we are bigger!! -Francisco

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HOM Package
by Francisco Garau 28 Apr '06

28 Apr '06

Hi, A couple of changeset that implement the HOM ideas. I ported them from an existing 3.4 version and added a minimal SUnit test case. I would like to write a Monticello package and put it on Squeak Source. Any pointers on how to do that? Cheers, Francisco

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Seaside talk video
by Bert Freudenberg 28 Apr '06

28 Apr '06

Marcus Denker's Seaside talk from 22C3 is available as video now: http://events.ccc.de/2006/04/21/gentlemen-fire-up-your-clients/ The file is called 22C3-599-en-seaside_squeak.mp4 (almost an hour, 346 MB). - Bert -

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How to make XMLDocument from a string?
by Bob Erb 28 Apr '06

28 Apr '06

Is there a way to make an XMLDocument from a string? I want to do something like this XMLDocument new parseDocumentFrom: '<root><child>wah</child></root>' but #parseDocumentFrom: takes a stream as an argument. I tried creating a TextStream from the string, then a ReadStream on that, but that didn't work. Thanks in advance for any help. - Bob Erb

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Sake = Rake for Smalltalk?
by francisco.j.garau＠jpmorgan.com 28 Apr '06

28 Apr '06

Stef, For your Mac, you could ask Marcel Weiher a copy of his Smalltalk Shell Script (stsh). He has demoed it at the last UK Smalltalk meeting and it looks really cool. It is scripting language (like csh) but with Smalltalk sintax. Also, very fast... Here a couple of examples: === #!/usr/local/bin/stsh # -- how the stsh framework runs an interactive command vi:=MPWCommandFilter filterWithCommandNamed:'vi' args:NSArray array target:stdout. vi setIsTarget:0. vi startRunning. === #!/usr/local/bin/stsh #-- initialize a PDF document object with the file passed on the command line pdf:=MPWPDFFile alloc initWithPdfData:(NSData dataWithContentsOfFile:(args objectAtIndex:1)). pdf parseXrefTables. #-- log a description of the pdf to the console (standard out ) stdout println:pdf. #-- get the first page object from the pdf file, log it page := (pdf pages objectAtIndex:0). stdout println:page. #-- get the 'content stream' of that page, resolving pdf indirect object reference content := (page objectForKey:'Contents') referencedValue. #-- get the (decoded) data from the content stream (the content stream is usually compressed) data := content data. #-- replace the content stream's encoded data with the uncompressed data we just got content setEncodedData:data. #-- remove the filter that indicates this data is compressed content setObject:nil forKey:'Filter'. #-- replace the stream length with the uncompressed length content dict setObject:(MPWPSInteger integer:data length) forStringKey:'Length'. #-- log the resulting dictionary / pdf object stdout println:content. #-- write the resulting PDF object writer := MPWPDFWriter streamWithTarget:MPWPDFByteStream stream. writer outputPDFFile:pdf. writer close. writer target target writeToFile:'out.pdf' atomically:1. --- Francisco Garau 0207 777 1362 - x71362 This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates.

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