July 2018 - Pharo-users - lists.pharo.org

safely determining whether ProcessWrapper process is running
by Peter UhnÃ¡k Aug. 3, 2018

Aug. 3, 2018

Hi, I feel like I am missing something obvious, but is there a _safe_ way to test if PW is still running? If the process pointer for whatever reason is no longer valid (e.g. the image crashed / I closed image), then #isRunning results in crashing the image. Maybe this is a bug? Thanks, Peter

2 1

transactions on pharo objects
by Peter UhnÃ¡k Aug. 2, 2018

Aug. 2, 2018

Hi, is there some library or approach how to do transactions in pharo? And I don't mean database transactions, but directly in memory on Pharo objects... e.g. p := Person new. transaction do: [ p name: 'Nobody'. p age: 70. ] on: Error do: [ transaction rollback. ]. self assert: p name equals: 'Nobody'. self assert: p age equals: 70. transaction do: [ p name: 'Somebody'. p age: 1 / 0. ] on: Error do: [ transaction rollback. ]. self assert: p name equals: 'Nobody'. self assert: p age equals: 70. Any pointers appreciated. Thanks, Peter

8 12

Monticello default repositories & Iceberg
by Evan Donahue Aug. 1, 2018

Aug. 1, 2018

I am using Pharo Launcher. Currently, if I create a new image and go to Settings > Software Configuration > Monticello, I see a "default local repository" and a "local cache directory" that point to old obsolete paths from years ago on my machine. As a result, I'm having trouble using iceberg through metacello, because it keeps looking for baselines in these old paths and crashing. What should those paths be for Pharo launcher? Does it use one default path for all images, or is there a way to tell it to change the default cache for each new image? Thanks, Evan

3 3

a basic hash question
by werner kassens Aug. 1, 2018

Aug. 1, 2018

Hi, i guess i can subsume almost everything i know about hashes in one sentence: it is my understanding that two objects that are equal (obj1=obj2. -->true) have to have the same hash value (which is used for some collection types), whereas objects where obj1=obj2 returns false should have different hash values although it may happen that they have the same one. now here things don't turn out exactly like that: (1 to:4) = #(1 2 3 4). "true" (1 to:4)hash = #(1 2 3 4)hash. "false" well ok, actually these results make - pfffh, in a certain way - sense to me, but i wonder what arguments the people in the know would use to defend that result, if i would have another opinion? werner

7 16

ZnCharacterWriteStream â is it a WriteStream?
by Andrew P. Black Aug. 1, 2018

Aug. 1, 2018

Iâm making a stream to write on a file using outputFile := FileLocator home / 'Desktop' / classBeingTranslated name , '.grace'. outputFile writeStreamDo: [ :s | ... ] Is that OK? When I do the above, in the writeStreamDo: block, s is bound to an instance of ZnCharacterWriteStream. But that class does nt understand many methods from WriteStream. For example, #contents is not understood, and nor is #ensureASpace. To put things another way: I wrote tests using a stream created with String streamContents: [ :s | ... ], and everything worked fine. Then, for production use, I switch to a stream created using outputFile writeStreamDo: [ :s | ... ] and everything breaks. I know that ZnCharacterWriteStream is fairly new. Am I doing something wrong, or is ZnCharacterWriteStream still under development? Andrew

3 2

[ANN] Pharo Git Thermite Release
by Ronie Salgado July 31, 2018

July 31, 2018

Hello, I am finally releasing an initial public version of Pharo Git Thermite, a tool that I am developing as part of my master thesis for visualizing Monticello and Git commits, for Pharo and Python: GitHub Page with sources/documentation/issue tracker: https://github.com/ronsaldo/pharo-git-thermite Short video examples: - Monticello Visualization; https://youtu.be/02CUHBmm-K8 - GitHub pull request: https://youtu.be/f196btLfYxM - Local git commit: https://youtu.be/LCHTiJ4nx3g Feedback form: https://docs.google.com/forms/d/e/1FAIpQLSeir6VlE3bR78oRsNAp9eHLkUn2Q016wEl… Best regards, Ronie

3 3

Re: [Pharo-dev] Charting in Roassal2
by Alexandre Bergel July 31, 2018

July 31, 2018

Hi! Roassal supports Whisker plots, but not exactly candlestick. You can try this: -=-=-=-=-=-=-=-=-=-=-=-= | b createList r | r := Random new. createList := [ :size :d1 :d2 | (1 to: size) collect: [ :i | d1 + (r next * (d2-d1))] ]. b := RTGrapher new. (1 to: 10) do: [ :i | | ds | ds := RTBoxPlotDataSet new. ds points: (createList value: 20 value: 0 value: 20). b add: ds.]. b -=-=-=-=-=-=-=-=-=-=-=-= Which produces: Another example: =-=-==-=-==-=-==-=-==-=-==-=-==-=-==-=-==-=-==-=-= | b ds | b := RTGrapher new. b extent: 400 @ 200. RTShape withAllSubclasses do: [ :cls | ds := RTBoxPlotDataSet new. ds points: (cls rtmethods collect: #numberOfLinesOfCode). b add: ds ]. ^ b =-=-==-=-==-=-==-=-==-=-==-=-==-=-==-=-==-=-==-=-= Which shows the distribution of methods size in Roassal Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On Jul 27, 2018, at 8:47 PM, Shaping <shaping(a)uurda.org> wrote: > > Hi Folks. > > Can anyone tell me whether we have candlestick-charting ability in Roassal2? > > > Shaping

1 0

Moose Java AST?
by Peter UhnÃ¡k July 31, 2018

July 31, 2018

Hi, is there a Java AST parser in Pharo? I imagine that jdt2famix must have something inside, but as far as I understand, it just extracts some information from the source code and throws the AST away. Thanks, Peter

3 2

Re: [Pharo-users] [Pharo-dev] [ANN] Pharo Git Thermite Release
by Arturo Zambrano July 28, 2018

July 28, 2018

This sounds great! I need to use something like this now. I will make questions ;-) and provide feedback On Tue, Jul 17, 2018 at 10:28 PM Alexandre Bergel via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > It would be fantastic that people try it out. It is easy to use, and is > really a big improvement over the tool set we use. > > And getting feedback is important. > > Cheers, > Alexandre > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > On Jul 17, 2018, at 11:08 AM, Ronie Salgado <roniesalg(a)gmail.com> wrote: > > Hello, > > I am finally releasing an initial public version of Pharo Git Thermite, a > tool that I am developing as part of my master thesis for visualizing > Monticello and Git commits, for Pharo and Python: > > GitHub Page with sources/documentation/issue tracker: > https://github.com/ronsaldo/pharo-git-thermite > > Short video examples: > - Monticello Visualization; https://youtu.be/02CUHBmm-K8 > - GitHub pull request: https://youtu.be/f196btLfYxM > - Local git commit: https://youtu.be/LCHTiJ4nx3g > > Feedback form: > https://docs.google.com/forms/d/e/1FAIpQLSeir6VlE3bR78oRsNAp9eHLkUn2Q016wEl… > > Best regards, > Ronie > > <thermite-visualization.png> > > >

2 1

OmniBase for Pharo 6
by Matias Maretto July 28, 2018

July 28, 2018

Hi folks, does anyone know how to get OmniBase for Pharo 6?. The Package on Pharo.org is for pharo 4, I tried to install them manually from the MCZ files, but I get a strange error in a closeHandle method. <apicall: Literal constant expected -> ulong 'CloseHandle' (long) module:'kernel32.dll'> ^self externalCallFailed. I am using win 7. Thanks. Matias.

8 33