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[Pharo-project] new mailist?
by Jon Hancock June 10, 2009

June 10, 2009

I have to unsubscribe. This list is too active. It clogs downloading of my email. It would be wonderful if the list were run on something with more options such as google groups. thanks guys. look forward to pharo's continued growth. Jon

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[Pharo-project] Syntax error loading Coral
by Luc Fabresse June 10, 2009

June 10, 2009

Hi all, I tried to load Coral in the latest dev image using ScriptLoader and I got a syntax error in "UnixProcess>>argsAsFlatArrayAndOffsets:". I guess it is an UTF-8 problem. Any ideas for a solution ? #Luc

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[Pharo-project] Lost code
by Schwab,Wilhelm K June 10, 2009

June 10, 2009

I have at times been disappointed to see good coding effort get lost, both in browsers and the debugger. In the latter, it seems to happen when it warns about having to revert to a previous block or something along those lines. The browser loses are still mysterious to me - maybe it happens if code pane isn't properly associated with the selected class. Is there a way that the tools could keep a buffer of a few "accepts" worth of code to salvage such situations? Bill

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[Pharo-project] new mailist?
by Torsten Bergmann June 10, 2009

June 10, 2009

Just login with email address at the bottom of [1] and edit the options so not all the emails get forwarded. This will still allow you to post but you can browse the list using the mailing list archive [2]. Bye Torsten [1] http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project [2] http://lists.gforge.inria.fr/pipermail/pharo-project/ -- GRATIS fÃ¼r alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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[Pharo-project] vm-maker
by danil osipchuk June 10, 2009

June 10, 2009

Hello squeak people Does anyone have a hint how to get (with reasonable effort) current vmmaker setup? May be there is a prepared image somewhere? I'm interested in building vm on windows. When I follow these instructions: http://wiki.squeak.org/squeak/6102 i stuck during loading of vmmaker from the squeak-map regards, Danil

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[Pharo-project] About EndOfStream notification [was Streams - #nextLine]
by Nicolas Cellier June 9, 2009

June 9, 2009

About this subject, here is a little reflexion explaining why Notification are not my preferred solution anymore (though I defended it at http://bugs.squeak.org/view.php?id=6755 ). If you remember animated discussions about EndOfStream, then you might say Oh no, not again! However, my opinion has evolved closer to Andreas' one. It still don't find == nil a good solution for generic Stream (though acceptable for character streams). Neither do I reject the idea of catching an EndOfStream : it can be efficient if the event is rare (in other words, if the stream is long, or if there are many wrappers, each testing == nil or atEnd). What I find a big mistake now is to generalize use of an Exception with a default action. I know, this default action is for backward compatibility (answer nil). But let's take an example showing how it can be bad: First load ConnectEndOfStream-M6755-nice.1.cs and RepeatUntil-M6755-nice.1.cs from http://bugs.squeak.org/view.php?id=6755 Then try this: | str sum buffer char | str := '123 456 798' readStream. sum := 0. buffer := WriteStream on: (String new: 16). [char := str next. char isSeparator ifTrue: [buffer isEmpty ifFalse: [sum := sum + buffer contents asNumber. buffer reset]] ifFalse: [buffer nextPut: char]] repeatUntil: EndOfStream. buffer isEmpty ifFalse: [sum := sum + buffer contents.]. ^sum Yes, it just split a string on separators, convert every packet into a number and sum the numbers. The example is silly, don't comment on that. There are plenty other ways to split a String. The problem is that the loop will stop after first number... What's going on? Well, asNumber uses a readStream to perform the conversion, reads past end, and signals an EndOfStream... That is bad... I should have protected the Exception handling with: | str sum buffer char | str := '123 456 798' readStream. sum := 0. buffer := WriteStream on: (String new: 16). [[char := str next. char isSeparator ifTrue: [buffer isEmpty ifFalse: [sum := sum + buffer contents asNumber. buffer reset]] ifFalse: [buffer nextPut: char]] repeat] on: EndOfStream do: [:exc | exc receiver == str ifTrue: [exc return] ifFalse: [exc pass]]. buffer isEmpty ifFalse: [sum := sum + buffer contents.]. ^sum Oh yes, easy. But imagine now that str is a wrapper on a FileStream... (for example an InflateStream). Exception handling soon becomes hard to write, because you might have to walk up the Context stack... There are better examples where I want Exceptions, so I'd like the choice to be in programmers hands. - 1) Raising an EndOfStream Exception (and not a Notification as I suggested) should be optional - 2) The Exception should not have a default action. The simple thing to do is to add an endOfStreamAction instanceVariable to Stream or ReadStream. If a read past end is attempted, then ^endOfStreamAction value. nil value = nil, so letting this inst var uninitialized will lead to backward compatibility (at minimal cost concerning efficieny!). filling the inst var with a block comes to mind immediately, and among natural choice is: Stream>>willSignalEndOfStream self endOfStreamAction: [EndOfStream signal] There might be more work for Stream wrappers, but that sounds a cheap and efficient idea to reconcile both worlds. What will protect above code example from an internal low level EndOfStream? Nothing, but the fact that programmers using explicitely #willSignalEndOfStream will know what they do! Either they will protect with a handling block, or advertise enough that the code might generate spurious EndOfStream on malformed inputs... Of course, I must remind: use Exception handling pattern but don't abuse. Programming with these deserve great care! Cheers Nicolas

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[Pharo-project] [ANN] pre-built Core #10331
by Marcus Denker June 9, 2009

June 9, 2009

Hi, I put a new core image up: https://gforge.inria.fr/frs/download.php/22419/Pharo0.1Core-10331cl.zip ...with all the updates till #10331 Marcus -- Marcus Denker - http://marcusdenker.de PLEIAD Lab - Computer Science Department (DCC) - University of Chile

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[Pharo-project] strange problem with tests
by Gabriel Brunstein June 9, 2009

June 9, 2009

I have a problem with some test cases. If I run them from the browser, they run successfully but if I run them from the test runner they fail sometimes but sometimes not. It is not a problem of process because there isn't any fork in the code. By the way, I checked the names of the process for both codes at all time and they are the same. What is more, if i add something like "Transcript show: 'something'" at the beginning of each method, they always run successfully. Any idea??

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June 9, 2009

Hi in http://code.google.com/p/pharo/issues/detail?id=135 may be stupidly I was thinking that it would be nice to check all the initialize methods that are not doing a super call, and fix them. Alain did this crazy and boring tasks and I was reviewing his code. Now I was wondering if it makes sense to add super initialize to the direct subclasses of Object. I have the impression that it is good for uniformity but we are calling an empty so we could do the following only fix the caller that are not subclasses of Object. What is your point of view, stef

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[Pharo-project] Fwd: Issue 584 in pharo: SqueakPageCache generateURL -> DNU because pathForFile is not defined on ServerFile
by StÃ©phane Ducasse June 9, 2009

June 9, 2009

I would be inclined to say that we should remove SqueakPageCache but what the other think? SqueakPageCache is a cache for Morph sved on disc and that can be reloaded Begin forwarded message: > From: codesite-noreply(a)google.com > Date: June 5, 2009 10:53:23 PM CEDT > To: stephane.ducasse(a)gmail.com > Subject: Issue 584 in pharo: SqueakPageCache generateURL -> DNU > because pathForFile is not defined on ServerFile > > > Comment #2 on issue 584 by alain.pl...(a)free.fr: SqueakPageCache > generateURL -> DNU because pathForFile is not defined on ServerFile > http://code.google.com/p/pharo/issues/detail?id=584 > > so do we remove SqueakPage (#issue 477) or not ? > > > -- > You received this message because you are listed in the owner > or CC fields of this issue, or because you starred this issue. > You may adjust your issue notification preferences at: > http://code.google.com/hosting/settings

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