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[Pharo-project] MethodDictionary fast #rehash
by Mariano Martinez Peck Sept. 18, 2011

Sept. 18, 2011

Hi guys. I was checking MethodDictionary >> rehash and this is terribly slow because of the #become. Then I saw #rehashWithoutBecome but it answers a different instance. I need a #rehash that does the rehash in the real object and answers self. So...I need the regular #rehash but I want to avoid the #become. Is that possible somehow? This is the current implementation: rehashWithoutBecome | newInstance | newInstance := self species new: self basicSize - 1. "Make sure it has the same capacity" 1 to: self basicSize do: [ :index | (self basicAt: index) ifNotNil: [ :key | newInstance at: key put: (array at: index) ] ]. ^newInstance I am terrible bad with Collection and friends, but cannot we do soemthing like this: rehashWithoutBecome | newInstance | newInstance := self species new: self basicSize - 1. "Make sure it has the same capacity" 1 to: self basicSize do: [ :index | (self basicAt: index) ifNotNil: [ :key | newInstance at: key put: (array at: index) ] ]. 1 to: newInstance basicSize do: [ :index | (newInstance basicAt: index) ifNotNil: [ :key | self at: key put: (newInstance array at: index) ] ]. ^ self Thanks for any help. -- Mariano http://marianopeck.wordpress.com

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[Pharo-project] Fwd: scaled decimal question
by StÃ©phane Ducasse Sept. 18, 2011

Sept. 18, 2011

Begin forwarded message: > From: Werner Kassens <wkassens(a)libello.com> > Date: September 18, 2011 5:11:59 PM GMT+02:00 > To: StÃ©phane Ducasse <Stephane.Ducasse(a)inria.fr> > Subject: scaled decimal question > > Hi Stephane, > occasionally i look at the the Pharo-project mailing list and i saw your question re ScaledDecimals. they are Fractions and you can can look at their internal representation by using asFraction. things like 0.1s2 are fractions built from scratch , hence 0.1s2 asFraction returns 1/10 while (0.1 asScaledDecimal: 2) asFraction returns the same thing as 0.1 asFraction. > aFloat asFraction is constructed in such a way that > aFloat asFraction asFloat= aFloat > for every aFloat. At least with a probability of (100 - epsilon)% with epsilon going to 0. while epsilon is not equal to 0 according to the author of asFraction (see the last comment at the end of Float>>asTrueFraction),obviously nobody has as yet found a counterexample, hence i would forget that. > iow (0.1 asScaledDecimal: 2)represents exactly the same number as the float 0.1. > since 0.1 + 0.2=0.3 returns false you would of course expect your first example to return false. and you would expect the error in the equality to be similar to the error in 0.1 + 0.2=0.3. although not necessarily equal. if this last statement does not immediately make sense, you might want to think a second or two about the results of these things: > ((0.1 asFraction ) + (0.2 asFraction))asFloat = (0.1 +0.2) . > ((0.1 asFraction ) + (0.2 asFraction)) = (0.1 +0.2) asFraction . > > werner

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[Pharo-project] do not forget to sign and send us the license agreement
by StÃ©phane Ducasse Sept. 18, 2011

Sept. 18, 2011

Hi guys this is important that you sign the license agreement for your code. http://code.google.com/p/pharo/wiki/HowToContribute Stef

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[Pharo-project] Tablet choice (was: New CogDroid alpha: with intent filter).
by Dimitry Golubovsky Sept. 18, 2011

Sept. 18, 2011

Stephane, StÃ©phane Ducasse wrote: > I would like to buy a tablet for our team to try pharo on it. > What do you suggest? While I would not recommend any particular brand (first of all I don't know what is available in Europe and at what price), take a look at the tinyBenchmarks page: http://code.google.com/p/squeakvm-tablet/wiki/TinyBenchmark and this might help you make decision. After all, there are not so more chipsets (SOCs) out there, so you can see that 1Ghz performs almost twice faster than 800MHz (I asked this on the ARM forum, and they suggested that cheaper SOCs may come with cheaper and slower memory, smaller cache, etc.). NVidia Tegra seems to be much better than Samsung. The rest of your choice will be likely affected by screen size, number of external ports (USB, HDMI, Ethernet), price, and known reliability record of a particular vendor ;) I'd recommend resistive touch screen (cheaper and works with any non-conductive stylus) but this might be just me. Thanks. -- Dimitry Golubovsky Anywhere on the Web

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[Pharo-project] [update 1.4] #14153
by Marcus Denker Sept. 18, 2011

Sept. 18, 2011

14153 ----- Issue 2986: DemoModeshould not change Fonts only sizes http://code.google.com/p/pharo/issues/detail?id=2986 -- Marcus Denker -- http://marcusdenker.de

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[Pharo-project] [update 1.4] #14152
by StÃ©phane Ducasse Sept. 18, 2011

Sept. 18, 2011

14152 ----- - Issue 4824: New tests for CompiledMethod equality. Thanks Mariano Martinez-Peck. http://code.google.com/p/pharo/issues/detail?id=4824 - Issue 4822: Improving TickList. Thanks Benjamin van Ryseghem. http://code.google.com/p/pharo/issues/detail?id=4822 - Issue 4823: Make MCSliceMaker use TickList. Thanks Benjamin van Ryseghem. http://code.google.com/p/pharo/issues/detail?id=4823 Stef

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[Pharo-project] New CogDroid alpha: with intent filter.
by Dimitry Golubovsky Sept. 18, 2011

Sept. 18, 2011

I have uploaded a new alpha of CogDroid: http://squeakvm-tablet.googlecode.com/files/CogDroid-alpha-20110918.apk Intent filtering has been added to the application. Also application icon and Java package name (org.golubovsky.cogstack) have been updated. Intents in Android are messages that an application may pass around to invoke other applications that subscribe to filtering intents with some properties. That is, another application may broadcast an Intent (via startActivity()) with scheme "file", content-type "application/x-squeak-image", and path to the image as data. CogDroid will start right with the image given (provided that it exists) without scanning the sdcard storage for available image files. Sample Java code for this: public void launchImage(String imgpath) { Intent cog = new Intent(); cog.setAction(Intent.ACTION_VIEW); Uri uri = new Uri.Builder().scheme("file").path(imgpath).build(); cog.setDataAndType(uri, "application/x-squeak-image"); try { startActivity(cog); } catch (Exception e) { // process the exception: it is raised if no recipients were found for this intent, e. g. CogDroid is not installed. } } Relevant section in CogDroid's AndroidManifest.xml: <intent-filter> <action android:name="android.intent.action.VIEW" /> <category android:name="android.intent.category.DEFAULT" /> <data android:scheme="file" android:mimeType="application/x-squeak-image" /> </intent-filter> I also created a simple launcher for two images (the application when installed shows an icon for each image). Unfortunately image paths are hardcoded (but just for illustration this should be OK), and a single Activity subclass is required for each image file. See under https://gitorious.org/~golubovsky/cogvm/dmg-blessed/trees/master/platforms/… Thanks. -- Dimitry Golubovsky Anywhere on the Web

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[Pharo-project] Issue 4538 and CompiledMethod equality
by Mariano Martinez Peck Sept. 17, 2011

Sept. 17, 2011

Hi guys. I am having a problem with the integration of issue 4538: http://code.google.com/p/pharo/issues/detail?id=4538 I am serializing CompiledMethods with Fuel and then I materialize them. To test they are correct, I use #= So far it was working correctly, but now for the materialized method it says they are not equal. The problem is that #= is failing in (self sameLiteralsAs: aCompiledMethod) And inside that method, it is failing because (literal1 == literal2 or: [ literal1 literalEqual: literal2 ]) answers false. So... why literal1 literalEqual: literal2 answers false? from what I can say, having that selector: "literalEqual", then both MUST be equal, because they are. The problem is that it was added: Association >> literalEqual: otherLiteral "Answer true if the receiver and otherLiteral represent the same literal. Variable bindings are literally equals only if identical. This is how variable sharing works, by preserving identity and changing only the value." ^self == otherLiteral So....I am not sure I agree with this change. Any idea how can we deal with this problem? Cheers -- Mariano http://marianopeck.wordpress.com

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Sept. 17, 2011

14151 ----- - Issue 4819: Fix MessageList>>#example. Thanks benjamin van ryseghem. http://code.google.com/p/pharo/issues/detail?id=4819 - Issue 4817: New Widget: Ticking list and widget.Thanks benjamin van ryseghem. http://code.google.com/p/pharo/issues/detail?id=4817 - Issue 4818: Fix for AbstractTool. Thanks benjamin van ryseghem. http://code.google.com/p/pharo/issues/detail?id=4818 - Issue 4821: Fixing changedMessageList to adapt to MessageList use (vs MessageSet R.I.P.). Thanks Veronica Uquillas-Gomez. http://code.google.com/p/pharo/issues/detail?id=4821 Stef

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Sept. 17, 2011

14151 ----- - Issue 4819: Fix MessageList>>#example. Thanks benjamin van ryseghem. http://code.google.com/p/pharo/issues/detail?id=4819 - Issue 4817: New Widget: Ticking list and widget.Thanks benjamin van ryseghem. http://code.google.com/p/pharo/issues/detail?id=4817 - Issue 4818: Fix for AbstractTool. Thanks benjamin van ryseghem. http://code.google.com/p/pharo/issues/detail?id=4818 - Issue 4821: Fixing changedMessageList to adapt to MessageList use (vs MessageSet R.I.P.). Thanks Veronica Uquillas-Gomez. http://code.google.com/p/pharo/issues/detail?id=4821 Stef

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