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

Stepping through with GLORP Proxies
by Esteban A. Maringolo June 25, 2014

June 25, 2014

Does anybody else have issues while stepping through GLORP Proxy objects (collections in this case)? I simply can't use this feature unless the proxied collection was already materialized. I can't reproduce it right now, but it bites me everytime is step through blocks, because stepping into is really annoying :) Does anybody else have the same issue? This is Pharo 2. Esteban A. Maringolo

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Pharo Video Tutorial
by kilon alios June 22, 2014

June 22, 2014

As you may or may not be aware of I have started a series of Video Tutorials that I upload to YouTube. I also add these tutorials to my "Pharo Video Tutorial" playlist. Since the last time I posted I have added 9 new tutorials. The playlist is now 2 hours and 22 minutes long and of course there is a lot more to come. The playlist is here : https://www.youtube.com/watch?v=Ol5ivaEATLQ&list=PLqbtQ7OkSta0ULYAd7Qdxof85… This is the list of the video tutorials the new ones are marked with bold : 1) Why Pharo 2) Install Pharo 3) Create a Class 4) Workspace Variables 5) Instance Variables 6) Temporary Variables *7) Inheritance* *8) Binary Messages* *9) Class Variables and Methods* *10) Class and Method Comments* *11) Browser Icons* *12) Conditions * *14) Arrays* *15) OrderedCollection and useful methods for collections*

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github metacello pero and jenkins matrix builds
by Yuriy Tymchuk June 6, 2014

June 6, 2014

Hi guys, So Iâm using this fancy metacello github urls, like: github://<user>/<project>[:<branch>|<tag>|<SHA>][/<path>] and some of my Jenkins matrix builds are randomly failing with: Error: /tmp/github-UkoRenrakumaster.zip already exists anyone has an idea how to solve this? Uko

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Zero Conf in windows CI
by Guillermo Polito June 4, 2014

June 4, 2014

Hi guys! I'm trying to configure a windows (7-32bits) slave to run DBXTalk tests :). I've had a loooot of troubles already trying to configure right mingw and get it to compile C, but I succeeded. Now, I'm trying to get it run tests in Pharo, but I have problems with ZeroConf and probably temp directories. The log is here: https://ci.inria.fr/dbxtalk/job/DBXTalk-OpenDBXDriver-Mysql/PHARO_VERSION=3… In summary, I have the following output: Downloading the latest 30 Image: http://files.pharo.org/image/30/latest.zip Access denied - IMAGE.QGJEMX File not found - -NAME The *access denied* I think is from the rm -rf of the temp directory, because the temp directory is created in the workspace and the image file is there and unzipped. The *File not found* looks like coming from the find. Maybe I'm lacking some environment variables I didn't configure... I tried comparing my slaves with the ones used in Pharo and I didn't take it much further. Additionally, if I connect to the slave through remote desktop (:puke:), and try to execute the zero conf script with the same user, on the same folder from a msys console, I have no errors. Maybe someone has an idea? :) Thanks a lot, Guille

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Regular Hangouts
by stepharo June 3, 2014

June 3, 2014

Hi guys I would really like to launch regular hangouts because I would like to build more contacts inside the community. I was thinking about every two weeks around 17h-18h What do you think? Stef

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Re: [Pharo-dev] GPU accelerated GUI
by Sean P. DeNigris June 3, 2014

June 3, 2014

darrinm wrote > On my Mac, Pharo's UI performance (e.g. window dragging, scrolling, any > kind of animation) is quite a bit less than the rest of the system. I > expect high frame rates for such basic things. It impacts everything I do > and makes me sad. > > I'm still learning and would like to know: > > 1) Is this also the case on Linux and Windows? > 2) I'm reading that Pharo's GUI is not hardware accelerated. Is this the > primary issue with UI performance? > 3) If so, is work to incorporate hardware acceleration in progress? > 4) If so, how can I help?! > > - darrinm ----- Cheers, Sean -- View this message in context: http://forum.world.st/GPU-accelerated-GUI-tp4760898p4761007.html Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

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Re: [Pharo-dev] OpenGL 3.0+
by Sean P. DeNigris June 3, 2014

June 3, 2014

darrinm wrote > Oh, and NBMacGLConstants is lacking necessary constants. Is it manually > created or generated somehow? > > - darrinm ----- Cheers, Sean -- View this message in context: http://forum.world.st/OpenGL-3-0-tp4760914p4761009.html Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

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String deduplication
by Philippe Marschall June 2, 2014

June 2, 2014

Hi This is an idea I stole from somebody else. The assumption is that you have a lot of Strings in the image that are equal. We could therefore remove the duplicates and make all the objects refer to the same instance. However it's not a simple as that. The main issue is that String has two responsibilities. The first is as an immutable value object. The second is as a mutable character buffer for building immutable value objects. We must not deduplicate the second kind. Unfortunately it's not straight forward to figure out which kind a string is. The approach I took is looking at whether it contains any 0 characters. An other option would be to check whether any WirteStreams are referring to it. Also, since there are behavioral differences between String and Symbol besides #= we must exclude Symbols (eg. there is #'hello' and 'hello' in the heap and they compare #= true but we must not make anybody who refers to 'hello' suddenly refer to #'hello'). Anyway here's the code, this saves about 2 MB in a fairly stock Pharo 3 image. Sorry for the bad variable names. | b d m | b := Bag new. d := OrderedCollection new. m := Dictionary new. "count all string instances" String allSubInstancesDo: [ :s | s isSymbol ifFalse: [ b add: s ] ]. "find the ones that have no duplicates or are likely buffers" b doWithOccurrences: [ :s :i | (i = 1 or: [ s anySatisfy: [ :c | c codePoint = 0 ] ]) ifTrue: [ d add: s -> i ] ]. "remove the ones that have no duplicates or are likely buffers" d do: [ :a | a value timesRepeat: [ b remove: a key ] ]. "map all duplicate strings to their duplicates" String allSubInstancesDo: [ :s | s isSymbol ifFalse: [ (b includes: s) ifTrue: [ | l | l := m at: s ifAbsentPut: [ OrderedCollection new ]. l add: s ] ]. "remove the duplicates" m keysAndValues do [ :k :v | | f | f := v at: 1. 2 to: v size do: [ :i | (v at: i) becomeForward: f ] ] Cheers Philippe

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Advice for a newb
by Rick Kitts June 2, 2014

June 2, 2014

Hello. I was wondering if anyone could point me to or otherwise suggest some best practices for working on Kernel code. Iâm futzing about with the Duration class (in the interest of fixing 13215) and have discovered that itâs really easy to crash Pharo if I break that class. I assume there are other classes that would exhibit the same behavior. I suppose I could just be really cautious and save my image after every change but that seems so error prone that Iâm hoping that there are idiomatic ways of working on kernel code (beyond just save ones image early and often) so I donât lose work. Iâm asking because the naive solution (copy the original class, modify it to suit, delete the original and rename the new class to the original) of course doesnât work. TIA for any suggestions or assistance and apologies in advance if this is RTFM, I didnât see anything (didnât look very hard either though). âRick

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Improving Pharo By Example
by kilon alios June 1, 2014

June 1, 2014

How I can help improve Pharo by Example , add chapters and update current ones for Pharo 3 ? What is the process ?

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