January 2013 - Pharo-dev - lists.pharo.org

[Pharo-project] New Cog VMs available

by Eliot Miranda

...at http://www.mirandabanda.org/files/Cog/VM/VM.r2672. CogVM binaries as per VMMaker.oscog-eem.255/r2672 [New[Co]]ObjectMemory: Fix becomeForward: so that objects whose references are deleted are freed and can no longer be resurrected via allObjects or allInstances. Remove freed young roots from the rootsTable. Filter freed objects pointed to from the extraRootsTable (because these locations can change it is wrong to remove entries from the extraRootsTable). Make primitiveIdentityHash pop all arguments, for Newspeak VMMirrors. StackToRegisterMappingCogit: Fix marshalling of absent receiver sends. The items beneath the arguments (and to-be-pushed receiver) must be spilled before the receiver is pushed. Improve code quality for numArgs > numRegArgs sends when receiver is not a spill and there are no uses of ReceiverResultReg amongst args. e.g. now avoids loading ReceiverResultReg from stack in code such as 1 with: 2 with: 3. -- best, Eliot

Jan. 15, 2013

[Pharo-project] SmalltalkHub is back online!

by Nicolas Petton

After a rather painful debugging/db-restoring session, SmalltalkHub is back online! So...what happened? Well, the db got currupted due to a concurrency issue, which is now fixed [1], resulting in very unstable behavior. Fixing the issue and restoring the db got SmalltalkHub back on track. Did I lose any data? Nope. What's next? I'll keep a close eye on the DB for the coming days and make sure it runs smoothly. Cheers, Nico [1] http://smalltalkhub.com/#!/~NicolasPetton/SmalltalkHub/diff/Hub-NicolasPett…

Jan. 15, 2013

Re: [Pharo-project] PasswordHashingFFI package - users should update

by StÃ©phane Ducasse

Thanks for sending us this link. It is quite interesting. Did the people think about using random generated number to change the response time? On Jan 14, 2013, at 9:32 PM, Paul DeBruicker wrote: > Hi - > > I was using a basic string comparison in the #checkPassword:against: > methods and I now understand that that is susceptible to a timing attack > on some systems (http://codahale.com/a-lesson-in-timing-attacks/) I'm > not sure these types of attack apply to Smalltalk environments or not > but its not hard to implement a constant time algorithm. > > > Instead of failing on the first unmatched character it reports > passing/failing after checking all characters in the hashes. > > > I think the new version is not susceptible to the timing attacks > mentioned in the linked article and if you use the package mentioned in > the subject you should update to the latest version. > > > Thanks > > > Paul >

Jan. 14, 2013

Re: [Pharo-project] Spreadsheet widget

by Hilaire Fernandes

Thanks for the pointer. It worked after a few changes but I don't if it renders as it should. Writting a spreasheet widget, even a tiny one, with basic editing as the ones Sabine shown us, is a lot of work. Thanks Hilaire Le 14/01/2013 18:13, Chris Cunningham a Ã©crit : > One that I've used recently (last year) was the result of a GSOC > project: http://www.squeaksource.com/GSoCSqueakland.html > specifically the GSoC-Spreadsheet part. Of course, there is a lot of > stuff about etoys there that may cause issues.

Jan. 14, 2013

Re: [Pharo-project] Spreadsheet widget

by StÃ©phane Ducasse

Hi hilaire I updated a bit the code of Hans. - remove clone - remove fractions:offset: to work in latest 2.0 - postCopy should call super postCopy. SpreadsheetGridMorph new openInWorld Open a new spreadsheet with "SpreadsheetGridMorph new openInWorld". You can enter numbers into the cells, and you may enter rules (start with "=", cell refs are written as A1, B1 etc). Currently implemented are +-*/ operations. The update machinery (which is the heart of a spreadsheet) works nicely. Would be good to publish the code somewhere. Stef

Jan. 14, 2013

Re: [Pharo-project] Zinc timeouts

by Camillo Bruni

On 2013-01-14, at 22:05, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > On 14 Jan 2013, at 21:54, Camillo Bruni <camillobruni(a)gmail.com> wrote: > >>> Issue with slice: http://code.google.com/p/pharo/issues/detail?id=7255 >>> >>> Yes, any DNS failure resulted in strange exception handling, IMO. This could indeed improve a couple more bogus situations. >> >> thanks >> >>> The following should work after you load the slice: >>> >>> ZnClient new >>> timeout: 5; >>> url: 'http://an.url.that.does.not.exists.ch/foo'; >>> logToTranscript; >>> downloadTo: FileSystem workingDirectory. >> >> I just tried, seems like your slice improves your example, though I still get issues when changing the number of retries: >> >> ZnClient new >> numberOfRetries: 1; "0 works..." >> timeout: 5; >> url: 'http://an.url.that.does.not.exists.ch/foo'; >> logToTranscript; >> downloadTo: FileSystem workingDirectory. >> >> looks like it is still somewhere in the net resolver... strange > > Well, I must admit that I don't really understand why/where it hangs ;-) > I saw there was a problem with NameLookupFailure and I fixed what I thought was wrong. > > Retry happens when something goes wrong, i.e. some exception is thrown. > It shouldn't make any difference what actually happened. > > But testing retry behaviour is hard, I will think about a way to do that in a unit test. I can imagine :/, I will try to step through a bit further to get close to the problem.

Jan. 14, 2013

Re: [Pharo-project] Spreadsheet widget

by StÃ©phane Ducasse

I'm migrating the code of Hans-Martin Mosner to load in pharo. After I will have a look at the GSOC code mentioned by chris Stef On Jan 14, 2013, at 10:27 AM, Hilaire Fernandes wrote: > Something worth collaborating? > > Hilaire > > Le 14/01/2013 10:09, Tudor Girba a Ã©crit : >> If we have it, I would be highly interested :) >> >> Doru >> >> >> On Mon, Jan 14, 2013 at 10:04 AM, Hilaire Fernandes >> <hilaire.fernandes(a)edu.ge.ch >> <mailto:hilaire.fernandes@edu.ge.ch>> wrote: >> >> Hello, >> >> Do we have such widget? >> >> Thanks >> >> Hilaire >> >> >> >> >> >> -- >> www.tudorgirba.com <http://www.tudorgirba.com> >> >> "Every thing has its own flow" > > >

Jan. 14, 2013

Re: [Pharo-project] Zinc timeouts

by Sven Van Caekenberghe

On 14 Jan 2013, at 21:54, Camillo Bruni <camillobruni(a)gmail.com> wrote: >> Issue with slice: http://code.google.com/p/pharo/issues/detail?id=7255 >> >> Yes, any DNS failure resulted in strange exception handling, IMO. This could indeed improve a couple more bogus situations. > > thanks > >> The following should work after you load the slice: >> >> ZnClient new >> timeout: 5; >> url: 'http://an.url.that.does.not.exists.ch/foo'; >> logToTranscript; >> downloadTo: FileSystem workingDirectory. > > I just tried, seems like your slice improves your example, though I still get issues when changing the number of retries: > > ZnClient new > numberOfRetries: 1; "0 works..." > timeout: 5; > url: 'http://an.url.that.does.not.exists.ch/foo'; > logToTranscript; > downloadTo: FileSystem workingDirectory. > > looks like it is still somewhere in the net resolver... strange Well, I must admit that I don't really understand why/where it hangs ;-) I saw there was a problem with NameLookupFailure and I fixed what I thought was wrong. Retry happens when something goes wrong, i.e. some exception is thrown. It shouldn't make any difference what actually happened. But testing retry behaviour is hard, I will think about a way to do that in a unit test. Sven

Jan. 14, 2013

Re: [Pharo-project] Spreadsheet widget

by StÃ©phane Ducasse

thanks chris for the pointer. On Jan 14, 2013, at 6:13 PM, Chris Cunningham wrote: > One that I've used recently (last year) was the result of a GSOC project: http://www.squeaksource.com/GSoCSqueakland.html > specifically the GSoC-Spreadsheet part. Of course, there is a lot of stuff about etoys there that may cause issues. > > -Chris > > > On Mon, Jan 14, 2013 at 5:39 AM, Torsten Bergmann <astares(a)gmx.de> wrote: > For Morphic look at Hans Martin Mosners work (Spreadsheet.zip) > here: > > http://lists.squeakfoundation.org/pipermail/squeak-dev/2008-September/13124… > > For seaside/web there are many jquery plugins for that available > on the web itself. For example: > > http://www.jquery4u.com/plugins/7-jquery-microsoft-excel-type-plugins/ > > Bye > T. > >

Jan. 14, 2013

Re: [Pharo-project] Spreadsheet widget

by StÃ©phane Ducasse

> Something worth collaborating on? Yes! We worked (I just watched and eat cookies :) with ben to start using his new List within nautilus as a start. But this is really the way to go. Stef > Hilaire > > Le 14/01/2013 10:09, Tudor Girba a Ã©crit : >> If we have it, I would be highly interested :) >> >> Doru >> >> >> On Mon, Jan 14, 2013 at 10:04 AM, Hilaire Fernandes >> <hilaire.fernandes(a)edu.ge.ch >> <mailto:hilaire.fernandes@edu.ge.ch>> wrote: >> >> Hello, >> >> Do we have such widget? >> >> Thanks >> >> Hilaire >> >> >> >> >> >> -- >> www.tudorgirba.com <http://www.tudorgirba.com> >> >> "Every thing has its own flow" > > >

Jan. 14, 2013