February 2015 - Pharo-users

MouseWheelEvent direction in Pharo 4
by Jan B. Feb. 22, 2015

Feb. 22, 2015

Hello In latest builds of Pharo 4 (in last 2 months probably), there has been a change in settings of mouse wheel event creation. In HandMorph >>#generateKeyboardEvent: In Pharo 3 there is MouseWheelEvent created by calling MouseWheelEvent new setType: #mouseWheel position: lastMouseEvent cursorPoint direction: (charCode = 30 ifTrue: [#up] ifFalse: [#down]) buttons: buttons hand: self stamp: stamp In latest Pharo 4 image, there is MouseWheelEvent created by calling MouseWheelEvent fromCharacter: charCode asCharacter position: lastMouseEvent cursorPoint buttons: buttons hand: self stamp: stamp There is a difference in what it results into, especially in MouseWheelEvent's instance variable direction. Pharo 3 sets direction to #up, Pharo 4 sets it to Character arrowUp. My question is whether direction being Character arrowUp is bug or feature, therefore if it should be fixed on Pharo side by using #up direction in MouseWheelEvent like before, or if it should be fixed on users side (Roassal for example), which currently compare it to symbol #up and should all compare it to Character arrowUp from now on. Jan -- View this message in context: http://forum.world.st/MouseWheelEvent-direction-in-Pharo-4-tp4806863.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Video presentation of Rewrite Tool
by Mark Rizun Feb. 21, 2015

Feb. 21, 2015

Hi, Video presentation of Rewrite Tool: http://screencast.com/t/LCEl0hFl Also on blog: http://myfuncoding.blogspot.com/ Please, I need your feedback on tool, so download it and try to use it. Any suggestions or questions are welcome! Best, Mark -- View this message in context: http://forum.world.st/Video-presentation-of-Rewrite-Tool-tp4806789.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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If you want to flex your brain and do useful stuff for the world in Smalltalk
by Yuriy Tymchuk Feb. 21, 2015

Feb. 21, 2015

http://rosettacode.org/wiki/Reports:Tasks_not_implemented_in_Smalltalk

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Re: [Pharo-users] Pharo and Docker
by Sean P. DeNigris Feb. 20, 2015

Feb. 20, 2015

ksi wrote > Already accomplished for archlinux - https://hub.docker.com/u/geal/ > The motivaton behind it - > https://www.clever-cloud.com/blog/guests/2015/01/05/smalltalk-in-the-cloud/ > > Cheers > Kiril ----- Cheers, Sean -- View this message in context: http://forum.world.st/Pharo-and-Docker-tp4806601p4806689.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Pharo and Docker
by Torsten Bergmann Feb. 20, 2015

Feb. 20, 2015

Docker is on hype these days: https://www.docker.com/whatisdocker/ Would it make sense to provide Pharo as preconfigured environment (Pharo/Seaside stack) or other environments like the PharoNOS project in the Docker registry?

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Send message on pharo open/close?
by David Carlos Manuelda Feb. 19, 2015

Feb. 19, 2015

I need for my application to register its main class somehow, that pharo will send a message (class side) to it whenever image is started/finished, for example, to reconfigure database connections as they get invalid when image closes and opens again. Is there any hook for pharo to be able to send a message to my class on image open and close? Thanks.

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Using the ~pharo/stable PPA
by Markus Fritsche Feb. 19, 2015

Feb. 19, 2015

Hello list, it looks to me that old and new packages have different dependencies. If you're *not* using pillar or phratch, and have problems updating the pharo packages, please execute dpkg -l | grep -i pharo | awk ' { print $2 } ' | xargs sudo apt-get -y purge ; sudo apt-get update && sudo apt-get install pharo-launcher "dpkg -l | grep -i pharo | awk ' { print $2 } '" will list all installed pharo-packages, xargs will give that result to apt-get for the packages to be purged (that is, remove all their data and metadata - the images that you have in your home directory will NOT be affected). Kind regards, Markus

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Enjoy Roassal on your seaside web application
by Pierre CHANSON Feb. 18, 2015

Feb. 18, 2015

Hi all, here is a short video to present how to integrate Roassal graphics in your Seaside application ! https://vimeo.com/119983485 http://smalltalkhub.com/#!/~PierreChanson/RoassalSeaside cheers, Pierre

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Small benchmark
by Andrea Ferretti Feb. 18, 2015

Feb. 18, 2015

Hi, a while ago I was evaluating Pharo as a platform for interactive data exploration, mining and visualization. I was fairly impressed by the tools offered by the Pharo distribution, but I had a general feeling that the platform was a little slow, so I decided to set up a small benchmark, given by an implementation of K-means. The original intention was to compare Pharo to Python (a language that is often used in this niche) and Scala (the language that we use in production), but since then I have implemented a few other languages as well. You can find the benchmark here https://github.com/andreaferretti/kmeans Unfortunately, it turns out that Pharo is indeed the slowest among the implementations that I have tried. Since I am not an expert on Pharo or Smalltalk in general, I am asking advice here to find out if maybe I am doing something stupid. To be clear: the aim is *not* to have an optimized version of Kmeans. There are various ways to improve the algorithm that I am using, but I am trying to get a feeling for the performance of an algorithm that a casual user could implement without much thought while exploring some data. So I am not looking for: - better algorithms - clever optimizations, such as, say, invoking native code I am asking here because there is the real possibility that I am just messing something up, and the same naive algorithm, written by someone more competent, would show real improvements. Please, let me know if you find anything Best, Andrea

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Issues with code formatting
by sergio_101 Feb. 18, 2015

Feb. 18, 2015

my pretty print is acting much differently than it used to. it seems to be breaking every statement into a separate line. at some point, i remember being able to adjust this via some system settings, but i am not finding that anymore. is this called something different now, or am i just not understanding how it works? thanks!

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