February 2014 - Pharo-users

a BitSet class
by Torsten Bergmann Feb. 6, 2014

Feb. 6, 2014

Hi Pablo, can you be more specific why you need a BitSet class other than convinience? What do you want to do? Note that for bit handling in Smalltalk you can easily just send messages to integers or large integers: Access bits: 12 bitAt: 1 -> 0 Modify bits: 12 bitAt: 1 put: 1 -> 13 Print binary: 12 printStringBase: 2 -> '1100' Print hex: 12 printStringBase: 16 -> 'C' Large number: 67677557657 printStringBase: 2 -> '111111000001111001011001001110011001' There are also #bitAnd:, #bitOr:, #bitXor: messages: 12 bitOr: 1 -> 13 12 bitAnd: 8 -> 8 and you can use the abbreviations known from C world: 12 | 1 -> 13 12 & 1 -> 0 If you want to see the bit representation just print as a string with base 2: 12 | 2 printStringBase: 2 -> '1110' So for octal use: 12 | 2 printStringBase: 8 -> '16' If you disklike to stay in decimal system you should be aware that in Smalltalk you can easily write a number in different bases directly using the "BASE, followed by r followed by number" representation. So you can for example write: 12 as 2r1100 as 16rC as 10r12 (decimal again) as 8r14 (octal) or any other base that you like directly With this you can also easily manipulate bits while writing in bit representation: 2r0001 bitOr: 2r0101 -> 5 same as: 2r0001 | 2r0101 -> 5 when you need the result again as bits: (2r0001 | 2r0101) printStringBase: 2 -> '101' Many other convinience methods are there like: 12 hex -> '16rC' 12 printStringHex -> 'C' $A hex -> '16r41' $A printStringHex -> '41' Feel free to mix all that (16rFF00 | 2r00001) hex -> '16rFF01' Try to get used to these methods and you will have fun with bits in Pharo Smalltalk easily. If you need something more tell us, a BitSet class implementation could be easily written using the above as a base. Bye T.

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a BitSet class
by Pablo Herrero Feb. 6, 2014

Feb. 6, 2014

Does anyone knows about BitSet class implementation lying around on the image or some external project? Thanks in advance.

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Path issue?
by vmusulainen Feb. 5, 2014

Feb. 5, 2014

FileSystem disk resolve: '.' => Path / 'home' / 'vmusulainen' / 'Downloads' / 'pharo3.0' / 'shared' FileSystem disk resolve: '..' => Path / 'home' / 'vmusulainen' / 'Downloads' / 'pharo3.0' Ta-da: FileSystem disk resolve: '../..' => Path / 'home' / 'vmusulainen' / 'Downloads' / 'pharo3.0' / 'shared' chain of messages from #resolve: brings to Path>>from: Path from: '.' => Path workingDirectory Path from: '..' => Path * '..' Path from: '../..' Path workingDirectory and it's implementation of addParentElementTo: addParentElementTo: result result isEmpty ifTrue: [result add: '..'] ifFalse: [result removeLast] I think that is the wrong behavior, isn't it? -- View this message in context: http://forum.world.st/Path-issue-tp4741803.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Re: [Pharo-users] Google Summer of Code is here, your ideas please!
by Dennis Schetinin Feb. 5, 2014

Feb. 5, 2014

Zdravo Janko! - Amber - Pharo interaction via WebSocket. Specifically, Pharo as IDE for Amber -- as continuation of http://gsoc2013.esug.org/projects/amber-tools and http://gsoc2012.esug.org/projects/mmi-amber - Boundless and zoomable interfaces with Pharo. Continuation of http://gsoc2012.esug.org/projects/esse using Athens. Perhaps creating some development tools. - Implementation of "Object Semantic Networks" as a new knowledge-representation engine to be used inside Pharo (for various purposes). -- Best regards, Dennis Schetinin

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Instance-specific behavior
by Sean P. DeNigris Feb. 4, 2014

Feb. 4, 2014

What would be the best way (as an experiment) to change the behavior of just one instance. For example, say: SpecialMorph>>#color ^ Color blue. but (the effect of) aSpecialMorph>>#color ^ owner color. ----- Cheers, Sean -- View this message in context: http://forum.world.st/Instance-specific-behavior-tp4741502.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Fonts
by Bob Williams Feb. 4, 2014

Feb. 4, 2014

I am using Pharo 3.0 and I want to experiment with Unicode Fonts; however, I am running into trouble getting a instance of the font for use with the selector /font/:. I can use the FreeTypeSelectionWindow to select the font I want, namely: FreeTypeFont('Cambria Math' 'Regular' 10). I do this by creating an instance of that Dialog and inspecting it. The inspector is of little use because the Dialog is no modal, i.e., it does not force a return. I can, however, perform the selection of the desired font which updates the inspector and then I can open an inspector on the realFont instance variable. While this tortured trail lead me to my answer the problem is still not solved. There are three solutions to my problem, namely: either the selection window can be made modal or there is a method that will take the parameters, FreeTypeFont, 'Cambria Math', 'Regular' and the pointSize 10, and will return a instance of the font, or the drawing method of the string accepts those parameters. Any help will be greatly appreciated, I hope to gain enough knowledge to document the proper use of Unicode. I need to understand it so I can create a math formula equation editor. Thanks to those that have answered my previous questions.

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Video "Pharo: Objects at your Fingertips" now on youtube
by Marcus Denker Feb. 4, 2014

Feb. 4, 2014

Hi, The talk I gave at Universitat PolitÃ¨cnica de Catalunya on Oct 30 is now on youtube: Pharo: Objects at your Fingertips http://www.youtube.com/watch?v=xhPlUaXpCU4 This should be simpler than the mms: link or silverlight player version that there was before. Slides are here: http://www.slideshare.net/MarcusDenker/pharo-objects-at-your-fingertips http://marcusdenker.de/talks/13BarcelonaTalk/PharoObjectsAtYourFingertips.p… Marcus

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Re: [Pharo-users] Roassal Sunburst examples not working
by Stephan Eggermont Feb. 4, 2014

Feb. 4, 2014

Alejandro wrote >World Menu > System > Settings > Appearance: > - Activate Use Free type... (If is already activated, deactivate it and activate it again). FreeTypeFontProvider current updateFromSystem.

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Re: [Pharo-users] Google Summer of Code is here, your ideas please!
by Stephan Eggermont Feb. 4, 2014

Feb. 4, 2014

Configuration sanity checker. Load all ConfigurationOfs and check if dependencies are missing or conflicting. By checking monticello files, the introduction moment and interface changes of classes are known, so a range of possible version combinations can be generated. See DeprecationFinder for some sample code. Distributed Issue Tracker, see LightHouse. New widget set, for use with Spec & Glamour. Needs a designer too. Stephan

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Pharo Success Story: Reflex Vacances
by Marcus Denker Feb. 4, 2014

Feb. 4, 2014

Hi, Added to the page http://www.pharo-project.org/about/success-stories Reflex Vacances ============= Reflex Vacances is a website to rent holiday homes all over France. The website lists 2000+ houses, and it runs 100% in Pharo + Iliad + MongoDB. "Cette plateforme regroupe des milliers d'annonces publiÃ©es par des propriÃ©taires de toute la France, tous spÃ©cialistes de la location de vacances. Nous l'avons dotÃ©e d'un logiciel sur mesure dÃ©veloppÃ© pour permettre Ã la fois aux visiteurs de juger de la qualitÃ© des annonces et aux propriÃ©taires de valoriser grÃ¢ce Ã un espace optimisÃ© ou le logement peut-Ãªtre abondamment dÃ©crit." Contact http://www.objectfusion.fr for more information.

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