December 2011 - Pharo-users

(no subject)
by Larry White Dec. 1, 2011

Dec. 1, 2011

Hi, Apologies for maybe cross-posting - been having trouble with getting my pharo mailing lists straight. I'm throwing this out there in case it turns out to be a bug. I'm running the Seaside one-click install on OS X Lion. Pharo1.3 Latest update: #13302 I can reliably cause my VM to freeze up and need to Force-Quit it from the OS. I'm implementing (copying) the probability distribution classes from the blue book. When I tried to create an instance of the Binomial class, the system hung. I can replicate the problem by sending the message #basicNew to ProbabilityDistribution. ProbabilityDistribution is a direct subclass of Stream and I haven't overridden or modified #basicNew. What's happening is that it fails in the BlockClosure [anObject doit], but only when I instantiate a member of this particular class hierarchy. In any attempt to instantiate a ProbabilityDistribution or its subclasses, a #doIt in a Workspace hits the line "self suspend" in the #terminate method of Process and the VM hangs there. I believe they had ProbabilityDistribution subclass from Stream because sampling from a distribution is like reading from a Stream, but I don't think any there's any actual shared code, so I switched the superclass of ProbabilityDistribution to Object and the code works fine now. If you want to replicate, just create a subclass Foo of Stream and send it the message #basicNew. Thanks. Larry

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[COTDC] 90 - TextAlignment
by sean＠clipperadams.com Dec. 1, 2011

Dec. 1, 2011

Continuing in Collections... Today: TextAlignment Comment Of The Day Contest - One Day One Comment Rules: #1: Each day a not commented class is elected. Each day the best comment will be integrated with name of the author(s). #2: If you cannot comment it, deprecate it. Results: http://code.google.com/p/pharo/wiki/CommentOfTheDayContest p.s. this message was sent from a pharo image. Did you know you could easily do that?!

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Mocking framework
by Juan Ignacio Vaccarezza Dec. 1, 2011

Dec. 1, 2011

Hi all, Which mocking framework would you recomend? Regards, Juan

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Re: [Pharo-users] Pharo By Example - VM issues
by Marcus Denker Dec. 1, 2011

Dec. 1, 2011

On Dec 1, 2011, at 10:56 AM, Stefan Marr wrote: > Hi: > > On 01 Dec 2011, at 10:29, Marcus Denker wrote: > >> The image used for the book is very old and does not have the cog related patches... >> >> The easiest would be to make a one-click with old vms for the book. >> Or we would need to find out (remember) exactly which patch is needed... > > I guess there is something specific in the Pharo tracker, but there is also: > http://squeakvm.org/cgi-bin/viewcvs.cgi/branches/Cog/image/NecessaryImageCh… > > > Kind of related to that: does anyone have a Squeak 3.9 image running on top of Cog? > As far as I understand, the main issue is that the image needs to use Closures instead of old style blocks. Is that correct? Yes. Would be quite some work, I think. Not impossible, but the question is if it would not be easier to change Pharo or current Squeak (in case of MVC) for your needs. Marcus -- Marcus Denker -- http://marcusdenker.de

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Re: [Pharo-users] Pharo By Example - VM issues
by Marcus Denker Dec. 1, 2011

Dec. 1, 2011

On Nov 28, 2011, at 6:35 PM, Johan Fabry wrote: > > On 28 Nov 2011, at 14:03, Igor Stasenko wrote: > >> On 27 November 2011 16:26, Johan Fabry <jfabry(a)dcc.uchile.cl> wrote: >>> Hi all, >>> >>> I'm evaluating PBE (1.0) because my nephew is starting to get interested in programming :-) >>> >>> There is a VM issue though: the PBE website refers the pharo website to download the VM, and the only VM I can find is in the 1.3 download page. This VM however crashes with the PBE image (MacOS). It works with the latest squeakvm (non-cog) though. I think, as a minimal-effort patch, it would be good to have the PBE website refer to squeakvm.org and clearly indicate that to run the PBE image a non-cog VM should be used. Idem on the pharoproject website. >>> >> can you tell, what causing crash? > > > Sure: It immediately crashed on opening the image. :-( The image used for the book is very old and does not have the cog related patches... The easiest would be to make a one-click with old vms for the book. Or we would need to find out (remember) exactly which patch is needed... Marcus -- Marcus Denker -- http://marcusdenker.de

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