November 2014 - Pharo-dev - lists.pharo.org

Re: [Pharo-dev] Julia vs Pharo
by Serge Stinckwich Nov. 17, 2014

Nov. 17, 2014

On Mon, Nov 17, 2014 at 2:56 PM, werner kassens <wernerk740(a)gmail.com> wrote: >>... What is missing in Pharo at the moment: >>- multiple dispatch >>- arbitrary precision float ... > > Hi Serge, > there exists an arbitrary precision float package made by nicolas cellier: > https://code.google.com/p/arbitrary-precision-float/wiki/ArbitraryPrecision… Great to know such a beast exist ;-) > ok, its not builtin into pharo, but this is not really a problem, one uses > those things more for crosschecking, where speed is not really a problem. > re multiple dispatch, actually this was the first and most important thing i > found missing when i discovered pharo ,squeak, smalltalk. otoh there exists > a package that does this; if i remember correctly the name is helvetica. i > read the papers about that package but never downloaded that package > essentially for two reasons: > - i'm a speed freak and feared this would slow down my programs too much. i > thought this is something that should indeed be hard coded. > - although, if i remember correctly, this package _is downloadable, it was > in a way deeply hidden in the internet (not in the usual places like > smalltalkhub or squeaksource) as if the author did not really want it to be > used by everybody for every task. I never heard about this one. Regards, -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Help fight Ebola by joining the Computing for Ebola Challenge http://bit.ly/1oEdBag

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ValueHolder analysis
by Alain Plantec Nov. 17, 2014

Nov. 17, 2014

Hi guys (this is stef hijacking the account of alain). I was puzzled by the fact that each value holder has its own announcer. Iâm trying to understand the pros and cons. Stef Announcer allInstances size 5417 Announcer allInstances collect: #numberOfSubscriptions #(0 1 2 3 51 0 16 1 16 3 0 2 12 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 0 2 1 16 1 2 1 1 9 1 0 0 2 37 1 5 1 2 1 1 12 0 0 0 0 0 0 0 0 0 1 0 2 1 16 1 2 1 1 9 1 0 0 2 35 0 1 5 1 2 1 1 12 0 2 2 2 4 2 1 0 0 2 2 2 2 3 2 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 2 0 0 2 0 1 0 0 0 0 0 0 0 0 0 2 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 0 2 2 2 4 2 1 0 0 2 2 2 2 3 2 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 2 2 2 4 2 1 0 0 2 2 2 2 3 2 0 0 0 0 1 1 0 0 0 1 1 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 1 1 0 1 1 0 0 0 0 0 0 1 1 1 2 1 1 0 0 0 0 1 0 1 1 1 0 0 1 1 1 0 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 1 0 0 0 1 1 1 0 1 1 0 0 0 0 0 0 1 1 1 2 1 1 0 0 0 0 1 0 1 1 1 0 0 1 1 1 0 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 1 0 0 0 1 1 1 0 1 1 0 0 0 0 0 0 1 1 1 2 1 1 0 0 0 0 1 0 1 1 1 0 0 1 1 1 0 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1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 4 2 1 0 0 2 2 2 2 3 2 0 0 0 0 0 0 2 0 0 0 0 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 4 2 0 1 0 0 2 2 2 2 3 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 4 2 0 1 0 0 2 2 2 2 3 0 1 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0)

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Julia vs Pharo
by Serge Stinckwich Nov. 17, 2014

Nov. 17, 2014

Hi all, I find a recent paper about Julia that might be appealing for people interested in doing scientific computation in Pharo (like the SciSmalltalk community) : http://arxiv.org/pdf/1411.1607v1.pdf "Julia: A fresh approach to numerical computing" Julia is a new dynamic programming language for scientific programming with much higher performance than R or Python. I found that some concepts are quite closed to Pharo in fact: - meta-programming and code generation - arbitrary precision integer - JIT compiler (based on LLVM) - call to C API What is missing in Pharo at the moment: - multiple dispatch - arbitrary precision float - dynamic dataflow type inference - optional type annotations (maybe with pluggable type extensions for Pharo ?) - special matrices types like spares or dense matrix, tri-diagonal, etc ... - vectorization Regards, -- Serge Stinckwich UCBN & UMI UMMISCO 209 (IRD/UPMC) Help fight Ebola by joining the Computing for Ebola Challenge http://bit.ly/1oEdBag

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Reproducible VM crash with excessive garbage collection
by Max Leske Nov. 17, 2014

Nov. 17, 2014

Hi. I may have discovered a bug in the PharoVM (stable and latest), which may have been around for at least two years (I had a very similiar situation about two years ago with Fuel). I have a test that fails when a particular method contains â3 timesRepeat: [ Smalltalk garbageCollect ]â. In order to be sure that itâ not the #timesRepeat message thatâs causing the crash, I replaced that with multiple âSmalltalk garbageCollectâ sends. The test Iâm talking about ObsoleteTest>>testFixObsoleteSharedPools. To make the test crash the VM, simply add a couple of garbageCollects at the end of SmalltalkImage>>fixObsoleteSharedPools. I tried to come up with a little script to demonstrate the issue but I can only reproduce the problem with Nautilus (which makes me suspect that the problem is related to Nautilus). Steps to reproduce: 1. get a fresh image and the latest vm: curl get.pharo.org/40+vmLastest <http://get.pharo.org/40+vmLastest> | bash && ./pharo-ui Pharo.image 2. open the class browser and navigate to SmalltalkImage>>fixObsoleteSharedPools 3. Append ten âself garbageCollectâ statements to the method. 4. navigate to ObsoleteTest>>testFixObsoleteSharedPools and click on the test runner icon to the left of the method name. I can reproduce this with the Mac VM (OS X 10.10) as well as with the linux VM (Ubuntu 12.04.1). Iâve opened an issue for this: https://pharo.fogbugz.com/f/cases/14478/Reproducible-VM-crash-with-excessiv… <https://pharo.fogbugz.com/f/cases/14478/Reproducible-VM-crash-with-excessiv…> Cheers, Max

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[pharo-project/pharo-core] 0635d1: 40371
by GitHub Nov. 17, 2014

Nov. 17, 2014

Branch: refs/heads/4.0 Home: https://github.com/pharo-project/pharo-core Commit: 0635d15a291debc0717b5f2711d3832e1a77f2e6 https://github.com/pharo-project/pharo-core/commit/0635d15a291debc0717b5f27… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2014-11-16 (Sun, 16 Nov 2014) Changed paths: M Kernel.package/Delay.class/README.md M Kernel.package/Delay.class/class/class initialization/initialize.st A Kernel.package/Delay.class/class/enable new code/newCodeEnabled.st A Kernel.package/Delay.class/class/enable new code/newCodeEnabled_.st M Kernel.package/Delay.class/class/snapshotting/restoreResumptionTimes.st M Kernel.package/Delay.class/class/snapshotting/saveResumptionTimes.st M Kernel.package/Delay.class/class/snapshotting/shutDown.st M Kernel.package/Delay.class/class/snapshotting/startUp.st M Kernel.package/Delay.class/class/testing/anyActive.st M Kernel.package/Delay.class/class/testing/nextWakeUpTime.st M Kernel.package/Delay.class/class/timer process/handleTimerEvent.st M Kernel.package/Delay.class/class/timer process/runTimerEventLoop.st M Kernel.package/Delay.class/class/timer process/scheduleDelay_.st M Kernel.package/Delay.class/class/timer process/schedulingProcess.st M Kernel.package/Delay.class/class/timer process/startTimerEventLoop.st A Kernel.package/Delay.class/class/timer process/startTimerEventLoop_.st M Kernel.package/Delay.class/class/timer process/stopTimerEventLoop.st M Kernel.package/Delay.class/class/timer process/unscheduleDelay_.st M Kernel.package/Delay.class/definition.st A Kernel.package/Delay.class/instance/enable new code/newCodeEnabled.st M Kernel.package/Delay.class/instance/private/schedule.st M Kernel.package/Delay.class/instance/private/unschedule.st A Kernel.package/DelayScheduler.class/README.md A Kernel.package/DelayScheduler.class/definition.st A Kernel.package/DelayScheduler.class/instance/class initialization/initialize.st A Kernel.package/DelayScheduler.class/instance/low priority processes/schedule_.st A Kernel.package/DelayScheduler.class/instance/low priority processes/unschedule_.st A Kernel.package/DelayScheduler.class/instance/primitives/primSignal_atMilliseconds_.st A Kernel.package/DelayScheduler.class/instance/snapshotting/restoreResumptionTimes.st A Kernel.package/DelayScheduler.class/instance/snapshotting/saveResumptionTimes.st A Kernel.package/DelayScheduler.class/instance/snapshotting/shutDown.st A Kernel.package/DelayScheduler.class/instance/snapshotting/startUp.st A Kernel.package/DelayScheduler.class/instance/testing/anyActive.st A Kernel.package/DelayScheduler.class/instance/testing/nextWakeUpTime.st A Kernel.package/DelayScheduler.class/instance/timer process/handleTimerEvent_.st A Kernel.package/DelayScheduler.class/instance/timer process/runTimerEventLoop.st A Kernel.package/DelayScheduler.class/instance/timer process/scheduleDelay_.st A Kernel.package/DelayScheduler.class/instance/timer process/schedulingProcess.st A Kernel.package/DelayScheduler.class/instance/timer process/startTimerEventLoop.st A Kernel.package/DelayScheduler.class/instance/timer process/startTimerEventLoop_.st A Kernel.package/DelayScheduler.class/instance/timer process/stopTimerEventLoop.st A Kernel.package/DelayScheduler.class/instance/timer process/unscheduleDelay_.st A KernelTests.package/DelayBenchmark.class/README.md A KernelTests.package/DelayBenchmark.class/class/action/run.st A KernelTests.package/DelayBenchmark.class/definition.st A KernelTests.package/DelayBenchmark.class/instance/action/run.st A KernelTests.package/DelayBenchmark.class/instance/support/generateDelayProcesses_priority_maxDuration_fromSeed_.st A KernelTests.package/DelayBenchmark.class/instance/support/trialConcurrent_priority_maxDuration_fromSeed_.st A KernelTests.package/DelaySchedulerTest.class/README.md A KernelTests.package/DelaySchedulerTest.class/definition.st A KernelTests.package/DelaySchedulerTest.class/instance/tests/testMaxTickLessThanDuration.st A KernelTests.package/DelaySchedulerTest.class/instance/tests/testMaxTickMoreThanDuration.st A KernelTests.package/extension/DelayScheduler/instance/testCaseSupportActiveDelay.st A KernelTests.package/extension/DelayScheduler/instance/testCaseSupportSetActiveDelayStartTime_.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - scripts/script371.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - updates/update40371.st M ScriptLoader40.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st Log Message: ----------- 40371 14261 Delay refactoring (part 1) - move scheduler from class-side to instance-side of its own class https://pharo.fogbugz.com/f/cases/14261 http://files.pharo.org/image/40/40371.zip

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WhatsUp from: 2014-11-17 until: 2014-11-30
by seaside＠rmod.lille.inria.fr Nov. 17, 2014

Nov. 17, 2014

Hi! We're sending this automatic email twice a month, to give the community an opportunity to easily know what's happening and to coordinate efforts. Just answer informally, and feel free to spawn discussions thereafter! ### Here's what I've been up to since the last WhatsUp: - $HEROIC_ACHIEVEMENTS_OR_DISMAL_FAILURES_OR_SIMPLE_BORING_NECESSARY_TASKS ### What's next, until 2014-11-30 (*): - $NEXT_STEPS_TOWARDS_WORLD_DOMINATION (*) we'll be expecting results by then ;)

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How do I get a >512MB image with Pharo 3 on a mac?
by Paul DeBruicker Nov. 16, 2014

Nov. 16, 2014

Hi - I don't have a need for a big image. I just discovered I have no idea how to make one larger than ~512MB, and am curious. I was running into an out of memory error and discussing it in a thread on pharo-users list (http://forum.world.st/running-out-of-memory-while-processing-a-220MB-csv-fi…) The details of that discussion aren't pertinent to this question. This script below ought to make an image that maxes out well above a GB but cannot cross 512MB without throwing an OutOfMemory error. | them | them := OrderedCollection new. [[them addLast: (ByteArray new: 16000000). Transcript cr; show: ((Smalltalk vm parameterAt: 3) / (1024*1024.0) printShowingDecimalPlaces: 1); flush] repeat] on: OutOfMemory do: [:ex| 2 to: them size by: 2 do: [:i| them at: i put: nil. Smalltalk garbageCollect]]. Transcript cr; show: ((Smalltalk vm parameterAt: 3) / (1024*1024.0) printShowingDecimalPlaces: 1); flush. them := nil. Smalltalk garbageCollect. Transcript cr; show: ((Smalltalk vm parameterAt: 3) / (1024*1024.0) printShowingDecimalPlaces: 1); flush In the transcript you will see an output of the image size as more ByteArrays are added to the OrderedCollection. On my laptop with 4GB of ram it always peaks at just over 500MB. Setting the memory from the command line (e.g. pharo-ui --memory 1000m Pharo.image) does not help. Is there a VM flag that I need to flip? Thanks Paul

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[NB] Undocumented NativeBoost options
by Max Leske Nov. 16, 2014

Nov. 16, 2014

I got a bit frustrated and ended up searching the source for â[\w]opt[[:upper]]â to find all NativeBoost options. Some of those options are in fact undocumented: optMayGC optProxyLabels optCdecl optReturnNullAsNil optStdcall optNonMovable optReserveCallgateSpace optDebug optNoAlignment optEmitCall optNoCleanup optCheckFailOnEveryArgument optStringOrNull WinUnicode NBFFICallout>>defaultOptions documents most options but refers to NBFFICallout>>allOptions, wich does not exist. Most of the above options can be considered internal, I guess, but the one option I needed (âoptStringOrNullâ) isnât documented anywhere. I had to step through the execution to find out why my function call wasnât working (because I was trying to use âoptCoerceNilToNullâ and didnât know that strings need a special option). Iâd be very thankful if these options would be included in the documentation. Note: âWinUnicodeâ is used by the Windows code in a couple of places, even though the option name is not valid, according to NBNativeCodeGen>>parseOptions: Cheers, Max

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[pharo-project/pharo-core]
by GitHub Nov. 16, 2014

Nov. 16, 2014

Branch: refs/tags/40371 Home: https://github.com/pharo-project/pharo-core

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How to add a morph to a Spec GUI
by kilon alios Nov. 16, 2014

Nov. 16, 2014

Hello guys I am trying to add a morph to spec gui before a spec button and the experience has been a nightmare so far. https://github.com/kilon/Nireas/blob/master/Nireas.package/Nireas.class/cla… I understand how columns and rows work but I cant figure out how Spec works with Morphs. I took a look at CheckBoxExample but it completely jammed my brain how complex it looks. First of all defaultSpec2 is what ? and whats the diffirence with defaultSpec ? Dont know about you but I don't like neither name defaultSpec and defaultSpec2 , I would have chosen a name like layout or something that makes sense. also why we need to initializeWidgets when we already define their order in defaultSpec ? Why cant Spec initialise those widgets by itself ? Is it really necessary for each element of the gui to be defined as a getter method ? Why not just put everything to a dictionary and make a getter for that dictionary ? It would make a complex Spec gui a nightmare to browser and leads to braking it up to more classes which will still make it a mess to browse. I see also a container defined in there , I assume it has something to do with the morphs. I took also a look at documentation at Pharo for the Enterprise and it has a section for building widgets but it looks too much work to add just a few morph to a Spec gui. I wanted to make the gui for Nireas with Spec and I like some of its design but overall it has been way more struggle than working with Morphic. I know I have complained about Spec before and sorry if I sound like a broken tape but making guis in heavily gui based environment like Pharo should not be so hard. I dont have a problem failing back to Morphic but since I see so many people praise Spec I keep wondering if I approach this the wrong way and things are much more elegant and easy than they look.

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