- Pharo-dev - lists.pharo.org

Re: [Pharo-dev] VM and .sources in separate dirs question

by Max Leske

> On 03 Apr 2015, at 19:02, Dmitri Zagidulin <dmitri(a)zagidulin.net> wrote: > > Do you happen to know how it does it? (I wouldn't know where to look, in the source code). Does it still work if you move the sources to another directory, from your current one? Does Pharo do a whole-disk search every time? (Or just when it doesn't find them?) > > On Fri, Apr 3, 2015 at 12:00 PM, Max Leske <maxleske(a)gmail.com <mailto:maxleske@gmail.com>> wrote: > >> On 03 Apr 2015, at 17:55, Dmitri Zagidulin <dmitri(a)zagidulin.net <mailto:dmitri@zagidulin.net>> wrote: >> >> On Fri, Apr 3, 2015 at 11:49 AM, Max Leske <maxleske(a)gmail.com <mailto:maxleske@gmail.com>> wrote: >> > that you can keep the VM and .sources in different directories? How do you tell the VM where to locate the sources? >> >> You donât. Itâs detected automagically! >> >> Wait, how does it know which .sources file to pick? :) What if there are .sources from multiple versions of Pharo, etc, lying around on the hard drive? No, Pharo wonât search your disk, that would take way too long. Basically, the image tries to find the sources in two places: 1. the image directory 2. the vm directory In reality Pharo tries to do a bit more. The places Pharo looks in are listed in OSPlatform>>potentialLocationsOfSourcesFile (and subclasses). See also PharoFilesOpener>>openSources. Note that the Pharo implementation has probably diverged a bit from the one that Squeak uses / used to use. Cheers, Max >> > > The image decides which sources file it needs. I have all of mine in a single directory with all the different VMs. Works like a charm. >

April 4, 2015

Re: [Pharo-dev] Freeze while running a loop

by Gaurav Singh

Thanks Alain :) On Sat, Apr 4, 2015 at 5:02 PM, Alain Rastoul <alf.mmm.cat(a)gmail.com> wrote: > Hi Gaurav, > > As said by Aliaksei, the problem is string concatenation with , > your example takes 33 secs on a core i7 3.3Ghz (quite some ms ;) ) > In Smalltalk, you handle that with streams (see Aliaksei example). > You can also add objects to all types of collections, not only strings > (Arrays etc). > You will find examples by searching references of WriteStream class (in > Nautilus, on WriteStream, right click / Analyse Class refs) or senders of > streamContents: . > Have a look at Pharo by examples chapter on streams > http://pharo.gforge.inria.fr/PBE1/PBE1ch11.html > (pdf here: http://pharobyexample.org/) > > And if you want to see what is going on with some code, you can select > your code in the workspace and use the 'Profile it' option in the menu. > Alternatively, you can open the profiler tools with World Menu/Tools/Time > Profiler, paste your code in the code pane of the profiler and run it. > A very handy tool, worth to know about it. > > HTH > > Regards, > > Alain > > >

April 4, 2015

Re: [Pharo-dev] Freeze while running a loop

by Alain Rastoul

Hi Gaurav, As said by Aliaksei, the problem is string concatenation with , your example takes 33 secs on a core i7 3.3Ghz (quite some ms ;) ) In Smalltalk, you handle that with streams (see Aliaksei example). You can also add objects to all types of collections, not only strings (Arrays etc). You will find examples by searching references of WriteStream class (in Nautilus, on WriteStream, right click / Analyse Class refs) or senders of streamContents: . Have a look at Pharo by examples chapter on streams http://pharo.gforge.inria.fr/PBE1/PBE1ch11.html (pdf here: http://pharobyexample.org/) And if you want to see what is going on with some code, you can select your code in the workspace and use the 'Profile it' option in the menu. Alternatively, you can open the profiler tools with World Menu/Tools/Time Profiler, paste your code in the code pane of the profiler and run it. A very handy tool, worth to know about it. HTH Regards, Alain

April 4, 2015

Re: [Pharo-dev] Forcing GTInspector to refresh

by stepharo

Ok I found the icon. Now redoing for the third time my video Stef > Hi > > I was doing a video on teaching how to build a simple counter and > I would like to know how I can refresh the value of an instance > variable in GT. > > I really hope that we will fix such kind of problem because it kills > my fun showing Pharo. > > Stef > >

April 4, 2015

Re: [Pharo-dev] Magritte = Auto-GT Presentation

by Norbert Hartl

Cool! Can you add a spec based editor for the object? ;) That woule be Ã¼bernice, haha. Norbert > Am 04.04.2015 um 06:01 schrieb Sean P. DeNigris <sean(a)clipperadams.com>: > > gtInspectorMagritteIn: composite > <gtInspectorPresentationOrder: 30> > | table | > table := composite table > title: 'Magritte'; > display: [ self magritteDescription children collect: [ :desc | > desc label -> (desc toString: (desc accessor read: self)) ] ]; > column: 'Field' evaluated: #key; > column: 'Value' evaluated: #value; > send: #value > > descriptionName > <magritteDescription> > > ^ MAStringDescription new > accessor: #name; > label: 'Name'; > priority: 100; > yourself > descriptionPages > etc... > > <http://forum.world.st/file/n4817448/Screenshot_2015-04-04_00.png> > > > > ----- > Cheers, > Sean > -- > View this message in context: http://forum.world.st/Magritte-Auto-GT-Presentation-tp4817448.html > Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com. >

April 4, 2015

Forcing GTInspector to refresh

by stepharo

Hi I was doing a video on teaching how to build a simple counter and I would like to know how I can refresh the value of an instance variable in GT. I really hope that we will fix such kind of problem because it kills my fun showing Pharo. Stef

April 4, 2015

Re: [Pharo-dev] Magritte = Auto-GT Presentation

by stepharo

Cool :) I still have on my endless todo to write a new chapter on magritte 3 :( Le 4/4/15 06:01, Sean P. DeNigris a Ã©crit : > gtInspectorMagritteIn: composite > <gtInspectorPresentationOrder: 30> > | table | > table := composite table > title: 'Magritte'; > display: [ self magritteDescription children collect: [ :desc | > desc label -> (desc toString: (desc accessor read: self)) ] ]; > column: 'Field' evaluated: #key; > column: 'Value' evaluated: #value; > send: #value > > descriptionName > <magritteDescription> > > ^ MAStringDescription new > accessor: #name; > label: 'Name'; > priority: 100; > yourself > descriptionPages > etc... > > <http://forum.world.st/file/n4817448/Screenshot_2015-04-04_00.png> > > > > ----- > Cheers, > Sean > -- > View this message in context: http://forum.world.st/Magritte-Auto-GT-Presentation-tp4817448.html > Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com. > >

April 4, 2015

Re: [Pharo-dev] MethodContextTest

by Marcus Denker

Yes! > On 04 Apr 2015, at 08:41, Ben Coman <btc(a)openInWorld.com> wrote: > > As I understand it, MethodContext is not more, and now there is only Context. > > Should MethodContextTest be renamed ContextTest ?

April 4, 2015

Re: [Pharo-dev] Ways to do 32-bit arithmetics?

by Andres Valloud

Hang on. It looks like their random number generator is based on a Jenkins' 32 bit hash function* such that the operation is: seed := some initial value. and then Random>>next seed := seed jenkinsHash. ^seed But who said Jenkins' hash function is a good RNG when used that way? I'd be interested to know if there was a proper citation, when I wrote the hash book I didn't see any such thing. Did I miss the reference? Am I reading the code right? Lagged Fibonacci RNGs are much more Smalltalk friendly, I'd use those. Andres. *: it would have been nicer for the code to say *which* Jenkins hash function, I suspect lookup3 but I didn't verify so... On 4/3/15 7:15 , Stefan Marr wrote: > Hi: > > I am porting some benchmarks to Pharo, which rely on a deterministic random number generator that uses 32 bit values. > > In order to have properly comparable results across platforms, it needs to generated the same sequence of numbers. > > So, I am looking for efficient ways to implement it, any ideas? > I am a little at a loss, with SmallInts and Long Ints, how to get the proper 32-bit values, and how to apply the correct shifts, especially the right shift can be problematic. > > Code examples below. > > Thanks > Stefan > > In Java it looks like this: > > private static int seed; > > // Robert Jenkins' 32 bit integer hash function. > public static int random() { > seed = ((seed + 0x7ed55d16) + (seed << 12)) & 0xffffffff; > seed = ((seed ^ 0xc761c23c) ^ (seed >>> 19)) & 0xffffffff; > seed = ((seed + 0x165667b1) + (seed << 5)) & 0xffffffff; > seed = ((seed + 0xd3a2646c) ^ (seed << 9)) & 0xffffffff; > seed = ((seed + 0xfd7046c5) + (seed << 3)) & 0xffffffff; > seed = ((seed ^ 0xb55a4f09) ^ (seed >>> 16)) & 0xffffffff; > return seed; > } > > > In SOM Smalltalk, it looks like this: > > > JenkinsRandom = ( > ---- > | seed | > > seed: val = ( seed := val ) > > "Robert Jenkins' 32 bit integer hash function." > random = ( > seed := ((seed + 2127912214 "0x7ed55d16") + (seed as32BitUnsignedValue << 12) as32BitSignedValue) as32BitSignedValue. > seed := ((seed bitXor: 3345072700 "0xc761c23c") bitXor: (seed as32BitUnsignedValue >>> 19)) as32BitSignedValue. > seed := ((seed + 374761393 "0x165667B1") + (seed as32BitUnsignedValue << 5) as32BitSignedValue) as32BitSignedValue. > seed := ((seed + 3550635116 "0xd3a2646c") bitXor: (seed as32BitUnsignedValue << 9) as32BitSignedValue) as32BitSignedValue. > seed := ((seed + 4251993797 "0xfd7046c5") + (seed as32BitUnsignedValue << 3) as32BitSignedValue) as32BitSignedValue. > seed := ((seed bitXor: 3042594569 "0xb55a4f09") bitXor: (seed as32BitUnsignedValue >>> 16)) as32BitSignedValue. > ^ seed > ) > ) >

April 4, 2015

MethodContextTest

by Ben Coman

As I understand it, MethodContext is not more, and now there is only Context. Should MethodContextTest be renamed ContextTest ?

April 4, 2015