December 2011 - Pharo-users

(no subject)

by Larry White

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

Dec. 1, 2011

Re: [Pharo-users] portable smalltalk, how ?

by Sven Van Caekenberghe

On 30 Nov 2011, at 17:58, t olschewski wrote: > does the absence of replies imply that there is no portability layer offering > a dialect-independent API to GUI, graphics and network functions yet ? (Most people are on the pharo-dev list and read pharo-users only casually I guess). Writing true portable Smalltalk code is plain hard: not just of language differences but more because of library differences. This is not that different from the C world I guess. There is only one big portable Smalltalk program that I know of: Seaside. Sven

Dec. 1, 2011

Re: [Pharo-users] portable smalltalk, how ?

by t olschewski

hm. To me this sounds like writing dialect- and platform-independent applications were close to impossible unless I either limit myself to ansi or encapsulate & wrap any non-ansi function I use - ? It also sounds to me like along with each of my non-ansi smalltalk programs I'd have to save the image and the VM version used in development if I haven't time or motivation to port my programs from one image version to the next or from one platform to another. -- View this message in context: http://forum.world.st/portable-smalltalk-how-tp4118832p4129355.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Dec. 1, 2011

[COTDC] 90 - TextAlignment

by sean＠clipperadams.com

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?!

Dec. 1, 2011

Re: [Pharo-users] Mocking framework

by Juan Ignacio Vaccarezza

Thanks I'll give it a try. On Wed, Nov 30, 2011 at 9:08 AM, Nahuel Garbezza <n.garbezza(a)gmail.com>wrote: > On 30 November 2011 08:29, Juan Ignacio Vaccarezza > <juanvaccarezza(a)gmail.com> wrote: > > Hi all, > > Which mocking framework would you recomend? > > > > Regards, > > Juan > > > > Juan, I recommend you to take a look on Mocketry > (http://magaloma.blogspot.com/2011/02/work-on-mocketry.html) > > It lets you to control all mock message sends with a nice syntax, and > it also comes with a DSL for writing assertions like "expression > should be: true" or "5 should be an instance of: SmallInteger". > > Nahuel. > >

Dec. 1, 2011

Re: [Pharo-users] Pharo By Example - VM issues

by Marcus Denker

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

Dec. 1, 2011

Re: [Pharo-users] Pharo By Example - VM issues

by Stefan Marr

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? Thanks Stefan -- Stefan Marr Software Languages Lab Vrije Universiteit Brussel Pleinlaan 2 / B-1050 Brussels / Belgium http://soft.vub.ac.be/~smarr Phone: +32 2 629 2974 Fax: +32 2 629 3525

Dec. 1, 2011

Re: [Pharo-users] Pharo By Example - VM issues

by Marcus Denker

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

Dec. 1, 2011