February 2010 - Pharo-dev - lists.pharo.org

[Pharo-project] OpenGL in pharo?
by Torsten Bergmann Feb. 11, 2010

Feb. 11, 2010

>It would be good to have 'AlienFFI working on linux' published so that we >can use it. I still wonder what's required to have it available on any Squeak/Pharo platform (incl. Windows) similar to FFI? Does one just have to generate the plugin or is OS specific code required? Bye T. -- GRATIS fÃ¼r alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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[Pharo-project] fixTemps and BlockContext question
by Luc Fabresse Feb. 11, 2010

Feb. 11, 2010

Hi all, I wonder why BlockContext>>fixTemps is still in PharoCore. I guess that it should be removed, isn't it? It has only one sender. Morever, should the BlockContext class be removed too? Depending on answers, I will write a bug report. Luc

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[Pharo-project] Pharo screencasts - how to
by laurent laffont Feb. 11, 2010

Feb. 11, 2010

Hi, I want to share how I record screencasts for Pharocasts http://pharocasts.blogspot.com/ in case someone wants to participate. Now there's 11 screencasts. The difficult part is to have a good idea / scenario for a screencast. Comments and ideas are welcome. If you want to publish on Pharocasts I can give you write access. Or if you have a "draft" screencast I can edit it / re-record it for publishing. I try to record screencasts with a minimum duration of 5 mn. These instructions are for Linux (but I'm a beginner in video stuff). I don't know which software to use on other operating systems. Have advices ? I record with xvidcap http://xvidcap.sourceforge.net/. I define a capture zone of 800x600 (use 4:3 or 16:9 standard resolution. If not you can have poor encoding results). Set multi-frame mode (you have to right-click on the file button to access preferences, not very intuitive). I choose AVI format / MPEG 4 codec. If you open / close applications for the screencast, note that KDE has very good options to memorize / force windows positions, so they are always opened in your capture zone.(Other window managers like E17 have these sort of options). The trick is to not stop recording when you write errors, you can cut the "wrong" parts later. To edit the video, I use avidemux http://fixounet.free.fr/avidemux/. It has Qt and Gtk GUI and work on Linux / Windows / OSX / BSD ..... It's really easy to use. When you want to cut a part, you define the beginning with the A button ( Ctrl-[ ), the end with B button ( Ctrl-] ), then Edit -> Cut ( Ctrl-X ). You can navigate using arrow keys. When finished, click on save (Choose another filename !!). So now you have your screencast in .mpeg file. Note that people using MacOSX Tiger or older have problems to watch this video. So I convert in .mov using ffmpeg http://www.ffmpeg.org/ like this: ffmpeg -i my_video.mpeg -b 500k my_video.mov. (but I think it's not the best command as the video size is bigger and quality lower). To publish the video I use Vimeo http://vimeo.com/. I've tried YouTube and Daily Motion but the quality is lower or the video duration is limited. I had problems using the "standard uploader", so I switch to the "basic uploader" on the download page, works better. It's really fun to record screencasts, and a good way to show development practices. Cheers, Laurent Laffont

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[Pharo-project] File out as Ruby - Possible ?
by CÃ©drick BÃ©ler Feb. 11, 2010

Feb. 11, 2010

Hi, Do you know if it's possible to export smalltalk code in ruby ? I have to port a small app I did and so, it could help me :) I don't think there's an existing tool, but maybe some directions... Actually, I'd prefer writing a simple tool to do that rather than doing all by hand. I don't expect it to work out of the box, but just save me some time. TIA -- CÃ©drick

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[Pharo-project] RBAbstractClass>>isAbstract
by Fernando olivero Feb. 10, 2010

Feb. 10, 2010

Lukas, do you think the second statement in this method could be removed, it would take a lot less time to know if a class is abstract. RBAbstractClass>>isAbstract (self whichSelectorsReferToSymbol: #subclassResponsibility) isEmpty ifFalse: [^true]. model allReferencesToClass: self do: [:each | ^false]. ^true I know it would change the definition of what is an abstract class for RB, but i'm just wondering if this is ok: "A Class is abstract if it defines a subclassResponsibility method and no other classes reference it" The second clause in my opinion could be avoided. Maybe it would be better to separate this method into: RBAbstractClass>>isAbstract ^ (self whichSelectorsReferToSymbol: #subclassResponsibility) notEmpty RBAbstractClass>>isUnreferenced model allReferencesToClass: self do: [:each | ^false]. ^true Thanks, Fernando

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[Pharo-project] [update 1.1] #11200
by StÃ©phane Ducasse Feb. 10, 2010

Feb. 10, 2010

11200 ----- - Issue 1922: use #forceNewFileNamed:do: pattern (part one) - Issue 1946: Enhanced Polymorph Tool diff from barcelona at citilab :)

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[Pharo-project] OT: compressing log files
by Eliot Miranda Feb. 10, 2010

Feb. 10, 2010

Hi All, I've just needed to make sense of a very long log file generated by strace. The log file is full of entries like: --- SIGALRM (Alarm clock) @ 0 (0) --- gettimeofday({1265744804, 491238}, NULL) = 0 sigreturn() = ? (mask now []) ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 and my workspace script reduces these to e.g. --- SIGALRM (Alarm clock) @ 0 (0) --- gettimeofday({1265744797, 316183}, NULL) = 0 sigreturn() = ? (mask now []) NEXT 2 LINES REPEAT 715 TIMES ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 --- SIGALRM (Alarm clock) @ 0 (0) --- gettimeofday({1265744797, 317189}, NULL) = 0 sigreturn() = ? (mask now []) My question is has anyone looked at this issue in any depth and perhaps come up with something not as crude as the below and possibly even recursive. i.e. the above would ideally be reduced to e.g. NEXT 7 LINES REPEAT 123456 TIMES --- SIGALRM (Alarm clock) @ 0 (0) --- gettimeofday({1265744797, 316183}, NULL) = 0 sigreturn() = ? (mask now []) NEXT 2 LINES REPEAT BETWEEN 500 AND 800 TIMES ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 ioctl(8, 0x80045530, 0xbfd4fe70) = 0 ioctl(8, 0xc1205531, 0xbfd4fb80) = 0 --- SIGALRM (Alarm clock) @ 0 (0) --- gettimeofday({1265744797, 317189}, NULL) = 0 sigreturn() = ? (mask now []) Here's my quick hack that I ran in vw7.7nc: | f o lines maxrun repeats range | f := '../Cog/squeak.strace.log' asFilename readStream. o := 'compressed.log' asFilename writeStream. lines := OrderedCollection new. maxrun := 50. repeats := 0. range := nil. [[f atEnd] whileFalse: [lines size > maxrun ifTrue: [repeats > 0 ifTrue: [1 to: range first - 1 do: [:i| o nextPutAll: (lines at: i); cr]. o nextPutAll: 'NEXT '; print: range size; nextPutAll: ' LINES REPEAT '; print: repeats + 1; nextPutAll: ' TIMES'; cr. range do: [:i| o nextPutAll: (lines at: i); cr]. lines removeFirst: range last. repeats := 0] ifFalse: [o nextPutAll: lines removeFirst; cr; flush]. range := nil]. lines addLast: (f upTo: Character cr). [:exit| 1 to: lines size do: [:i| | line repeat | line := lines at: i. repeat := lines nextIndexOf: line from: i + 1 to: lines size. (repeat ~~ nil and: [lines size >= (repeat - i * 2 + i) and: [(i to: repeat - 1) allSatisfy: [:j| (lines at: j) = (lines at: j - i + repeat)]]]) ifTrue: [repeats := repeats + 1. range isNil ifTrue: [range := i to: repeat - 1] ifFalse: [range = (i to: repeat - 1) ifTrue: [range do: [:ignore| lines removeAtIndex: repeat]. exit value]]]]] valueWithExit]] ensure: [f close. o close]. repeats Forgive the cross post. I expect deep expertise in each newsgroup posted to. best Eliot

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[Pharo-project] Diff tools
by Torsten Bergmann Feb. 10, 2010

Feb. 10, 2010

Gary wrote: >Done for Polymorph-Tools-Diff-gvc.21. Coool, thanks! Bye T. -- Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3.5 - sicherer, schneller und einfacher! http://portal.gmx.net/de/go/atbrowser

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[Pharo-project] creating a new metacello version from current commited packages
by Fernando olivero Feb. 10, 2010

Feb. 10, 2010

Hi, is this feature available in Metacello? To create a new version automatically by 1. using latest version number found in any method + 1 , in the ConfigurationOfXXX) 2. using commited packages in the repository Something like ConfigurationOfXXX>>createVersionNamed: aVersionNameSelector That would compile the method ConfigurationOfXXX>>aVersionNameSelector <version: 'lastestVersion+1' imports: #('1.0-baseline')> spec for: .... do: [ spec blessing: #development. spec repository: 'http://www.squeaksource.com/XXX'. spec author:'Me'; package: 'Gaucho-Core' with: 'Gaucho-Core-FernandoOlivero.78' ; package: 'Gaucho-Drawables' with:'Gaucho-Drawables-FernandoOlivero.37' ; ..... Or everybody is creating new version by hand, fetching the latest versions names from the monticello repo? Thanks, Fernando

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[Pharo-project] Diff tools
by Torsten Bergmann Feb. 10, 2010

Feb. 10, 2010

Hi Gary, the diff tools are really great. One feature I miss from Eclipse - when one clicks on one of the small rectangles (in the gradient area beside the srollbar) the editor in eclipse jumps to the according change (adapting the scroll bar). Maybe it is simple to add... Thanks Torsten -- GRATIS fÃ¼r alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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