Squeak-dev August 2008

squeak-dev@lists.squeakfoundation.org

103 participants
139 discussions

Letting Set contain nils?
by Igor Stasenko 11 Aug '08

11 Aug '08

Sets which not allowing contain nil as element is a point of inconvenience. There are two ways how get around that: - initialize an array which contains set elements with unique object ~~ nil. and fix methods which testing for an empty slots to compare against this object, not nil. This can cause a slowdown during rehashing, because VM initially creating arrays filled with nils, while we need to fill them with another object. There is also a problem with preserving it 'uniqueness' by not giving this object outside a set. - add an instVar 'containsNil' then when set receiving 'add: nil' , it simply sets this flag to true. modify #collect: , #do: , #remove: to be aware of flag value. I find the second way is more appropriate. While it costs additional memory per Set/IdentitySet instance, it costs almost nothing in speed. What do you think about supporting Sets to contain nils in general, and about methods how to achieve that? -- Best regards, Igor Stasenko AKA sig.

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DiffMerge
by Tony Garnock-Jones 11 Aug '08

11 Aug '08

Hi Alexandre, all, I just fixed a stupid bug in DiffMerge where trailing non-common regions weren't being processed by diff and comm. DiffMerge-tonyg.5.mcz is in http://www.squeaksource.com/DiffMerge. I only noticed the bug because I was nosing around the Kerala mcz in the same repository, which looks very interesting -- what is it? Regards, Tony

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Learn on Squeak VM
by beepeng ang 11 Aug '08

11 Aug '08

Hi, everyone. I am very new to Squeak. I need to learn on Squeak virtual machine and plugin for my project. I have never taken any courses on virtual machine or compiler before. I hope that somebody can show me where to start with, will it be the Blue book? Or perhaps there are other alternatives. I have read through some webpages in www.squeakvm.org, but I find it hard to understand maybe because I don't have a strong foundation on this. Thank you so much for helping. Send instant messages to your online friends http://uk.messenger.yahoo.com

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XML Validation
by P.Davidowitz 11 Aug '08

11 Aug '08

Is there currently a way to generically validate an XML instance file against its schema within Squeak, and if not, is someone working on this? Thanks, Paul Davidowitz pdavidow(a)gmail.com

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[squeak-dev][ANN] squeakGtk
by Gwenaël Casaccio 11 Aug '08

11 Aug '08

Hello all, There is a new version of squeakGTK you can try it at: http://code.google.com/p/squeakgtk/ You need to compile a new vm but everything is explained on how to build a vm or to use a prepared vm with the right patches. You can use a special image with a new main interface no more morphs (of cours it is still a beta software I need to polish it) look at : http://squeakgtk.googlecode.com/files/squeakLauncher.png . Cheers, Gwenael Casaccio

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Squeak leadership meeting 6 Aug 2008
by tim Rowledge 10 Aug '08

10 Aug '08

Present were craig, randal, tim, yoshiki, with technical help in Qwaq Forum matters from Andreas and Josh. The Forum stuff works quite well. Randal did not sing for us this time but instead beat our avatars with a wall. 1. website; We agreed that Janko's proposal would be accepted. (Igor subsequently added his agreement via email). 2. licensing; still no contact with Ward Cunningham nor Andy Greenberg wrt re-licensing paperwork. Since Andy wrote a considerable portion of the CCodeGenerator and related classes for plugins, this is quite important. - Also noted wrt this subject: we still need notices on SqSrc, MC, Mantis about contributions, pointing out that they *must* be MIT or we can't accept them for inclusion in the core tim -- tim Rowledge; tim(a)rowledge.org; http://www.rowledge.org/tim Useful random insult:- If he were any more stupid, he'd have to be watered twice a week.

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A website to communicate about Smalltalk companies
by Damien Cassou 10 Aug '08

10 Aug '08

Hi, some websites (http://www.esug.org/Smaltalk/Companies, http://community.ofset.org/index.php/Entreprises_utilisant_Smalltalk) lists Smalltalk customers and companies. It would be interesting to merge these lists and update them. That would help us promote Smalltalk. I don't think esug.org is the right place because it's restricted to Europe. ofset.org is also not the best choice because it's mainly French. Merik Voswinkel proposes to create a new wiki and put a domain for it. It's an interesting idea. What about smalltalk.org? Who owns this domain and who is responsible for maintaining it? On Thu, Jul 31, 2008 at 10:58 AM, Merik Voswinkel <macmerik(a)xs4all.com> wrote: > Damien, > > On Jul 31, 2008, at 10:43 AM, Damien Cassou wrote: > >>> There is also a list on the french wiki : >>> http://community.ofset.org/index.php/Entreprises_utilisant_Smalltalk >>> >>> Maybe these lists should be merged and consolidated. >> >> Thanks for the pointers. Once I finish my presentation, I could change >> these wiki pages. > > > I could set up an new wiki for you, and I think Rob Vens could find someone > to keep it updated in the future. > > As a stopgap solution you can use the two wiki's below right away, I'll > transfer them to a proper place on friday and put a domain on them. Tell me > what you need and I'll arrange it. > > http://squeakphone.wiki.xs4all.nl/index.php?title=Main_Page > http://www.macmerik.nl:8080/seaside/pier > > My professional Linkedin groups on Smalltalk will certainly be able to > supply more names, and be interrested in the list as a broadcast. > > Do not forget the www.cmsbox.com or netstyle.ch customers. > > > Merik > > -- Damien Cassou Peter von der Ahé: «I'm beginning to see why Gilad wished us good luck». (http://blogs.sun.com/ahe/entry/override_snafu)

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About String vs Symbols
by stephane ducasse 09 Aug '08

09 Aug '08

Hello I'm reading newspeak spec and I like the idea of immutable strings. Now what does it really bring to us? Then does it mean that we could get rid of symbols immutability does not imply unique identity. Stef

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Re: Getting that Silver Squeak badge
by Ken Causey 09 Aug '08

09 Aug '08

Tim Rowledge is the originator and, as far as I'm aware, still the controller of the badges. Perhaps he can provide an update on that project and perhaps someone from ESUG can tell us if badges will be available at the ESUG conference. You might also want to ask on the ESUG mailing list. Ken On Thu, 2008-08-07 at 07:56 +0200, Danie Roux wrote: > Ken, > > Can you please point me to the right person to claim my badge from? > > On the 7th of May I donated $10 with the payment info sent to > esug-info(a)esug.org. I did not pursue the claiming of the badge because > I live in South Africa and the shipping costs for that badge would > have been ridiculous. > > However, I will be at the ESUG conference end of this month, it would > be awesome to get the badge from someone there :-) >

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Exception and defaultAction
by Bergel, Alexandre 09 Aug '08

09 Aug '08

Dear List, I wish to understand a crucial (and difficult) point of the Squeak exception handling mechanism. Basically, my question is: How a debugger gets opened when an exception is thrown? Clearly, the method Error>>defaultAction gets invoked somehow. By UndefinedObject>>handleSignal: when reaching the bottom of the method call stack I suspect. I suspect that this handleSignal: is called by a Exception>>pass. So, my question is where? in PasteUpMorph>>becomeActiveDuring: ? This is not easy to figure out since when a debugger gets opened, the part of the stack used to open it is discarded (how?). Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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