August 2014 - Pharo-users - lists.pharo.org

Finalization question
by Udo Schneider Aug. 6, 2014

Aug. 6, 2014

All, I just stumbled over something which thought was pretty easy - turned out it isn't as easy as I thought or I'm simply _______ (fill in expression of choice like "too dumb", "blind", etc.) I have an object which starts a background process to do it's job. This object holds a reference to the running proccess in an instance variable. My goal is to #terminate that proccess once the object isn't needed anymore (before GC). Using WeakRegistry for the object itself doesn't work. E.g. MyObject>>#initialize super initialize. WeakRegistry default register: self. myProcess := self startProcess. MyObject>>#finalize myProcess terminate. "Doesn't work. myProcess is already nil" I think this is due to all the ivars of the object already being nil when #finalize is begin called. As far as I read the code this is due to Object>>#executor returning a shallow copy of the object and thus being by intention ... So how to proceed? Did I miss something obvious? Is overwriting #executor the way to go (in terms of "does it work" and "doesn't it break something")? Best Regards, Udo

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Question on Spec
by Mark Rizun Aug. 6, 2014

Aug. 6, 2014

Hi, I'm writing tests for RewriteTool which I build with spec. I have a TextModel in this tool. When I do: /RewriteTool new openWithSpec/, /TextModel sourceTextArea/ is initialized, however in tests I don't want to open a tool, just want to initialize it. So I wrote /RewriteTool new/. Everything is initialized, but/ TextModel sourceTextArea/ is /nil/. And I don't know why. Any thoughts? Best, Mark -- View this message in context: http://forum.world.st/Question-on-Spec-tp4771958.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Your success stories ...
by stepharo Aug. 5, 2014

Aug. 5, 2014

"Pharo success stories" is getting started at http://www.pharo.org/success TrentoSur http://trentosur.com looks so sexy Please send me information about yours they will be added to the pending queue Stef

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Xcode's Swift Playground
by darrinm Aug. 5, 2014

Aug. 5, 2014

This is the sort of thing Smalltalk seems well suited for (live coding w/ value and iteration display). Does anyone know of something like it that has been done before in Smalltalk? I don't have a good link to a demonstration purely of the Playground but there is a little info here: https://developer.apple.com/swift/ -- View this message in context: http://forum.world.st/Xcode-s-Swift-Playground-tp4761425.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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NativeBoost: use of array
by Thomas Bany Aug. 5, 2014

Aug. 5, 2014

Hi again ! I'm having trouble to call the function with the following prototype : void propagateTLE(orbit_t orb, double secondSince[], xyz_t * out, size_t > nbEpoch) with the corresponding NB call: self nbCall: #( void propagateTLE(orbit_t orbit, double * secondSince, > xyz_t * out, size_t nbEpoch) ) The argument *secondSince* is an input and the argument *out* is the output pointer that the function should fill. I have made 2 subclass of NBExternalArray to feed this function, (allmost) namely: *ArrayOfDoubles *and *ArrayOfXYZ*. Should I mention that type *xyz_t* is a struct that I modeled with an *NBExternalStructure*. I face 2 issues: - The type *ArrayOfXYZ* is refused as an *xyz_t** type. However, the *ArrayOfDoubles *is accepted as a *double** type. - If a get rid of the *out* argument to test the array *secondSince*, I get an undefined error (Error durring FFI call: nil). My current solution is to use the adress of my arrays and the following NB call: self nbCall: #( void propagateTLE(orbit_t orbit, NBExternalAddress > secondSince, NBExternalAddress out, size_t nbEpoch) ) But it feels like I'm cheating my way trough, by pretty much avoiding any type check. Any clue as to why the typecheck of NB is refusing to call my function ? Thanks in advance, Thomas.

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Monticello vs Metacello dependency management
by Evan Donahue Aug. 4, 2014

Aug. 4, 2014

Hello, I am working on getting a project into Monticello, and I am trying to understand the difference between letting Monticello handle package dependencies and setting up a metacello configurationOf class. In particular: PBE2 describes a technique of adding a MyProject-All package that requires MyProject-Core and MyProject-Tests (for example) so that one need only save and load MyProject-All and the others will come along for the ride. I have gotten this to work and it seems like a straightforward approach for a simple project. My question, then, is how does a Metacello ConfigurationOf differ from this approach for the simple core + tests project described? Here are a couple of my points of confusion, but it may be that they can all be answered with one concise statement: 1) If I set up a ConfigurationOf, can that replace the MyProject-All package for saving and loading the whole project at once, or are they complimentary techniques? 2) Is the Monticello action-click >> add required package necessary if one specifies dependencies in the ConfigurationOf? Would they cause problems if they went out of sync with the dependencies described in the ConfigurationOf? 3) Do I correctly infer that the proper way to use a ConfigurationOf is to give it no dependencies, load it from the project repository on its own, and then run its project load message to have it import the rest of the project? If there are any particularly good resources describing the use of Metacello beyond PBE2, please let me know. In the meantime, I'll keep searching and experimenting. Thanks, Evan

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Syncing local cache and SmalltalkHub
by Offray Vladimir Luna CÃ¡rdenas Aug. 4, 2014

Aug. 4, 2014

Hi, I have my outliner buggy mockup on local cache, and I would like to share the code and point to it online using SmalltalkHub for my questions. I have followed the chapter on Source code management with Monticello y PBE2, and it says that you can have your code on SmalltalkHub, but says nothing about how to sync from local cache to your SmalltalkHub account. Can some one could point me the way to do it? Cheers, Offray

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NativeBoost: structure with different types
by Thomas Bany Aug. 4, 2014

Aug. 4, 2014

Hi everyone ! I experience troubles with NBExternalStructure in NativeBoost when the structure modeled contains fields with different types. For example, manipulating the following structure poses no problem and I can manipulate the fields correctly: typedef struct abc_s { double a; double b; double c; } abc; However, setting field 'a' to be an int yields the following symptoms: Â¤ From Pharo to C (function with 'abc' as argument type), the fields are badly read. Â¤ From C to Pharo (function with 'abc' as return type), the VM crash without an error nor a dump. Am I doing something wrong or is it maybe specific to the compiler I use (the one that comes with Visual Studio Express 2013) ? I'm pretty sure I could go arround this using NBExternalObject and building the structure on C side, but it would be nice to avoid it. On a side note, my understanding is that creating a structure on Pharo side will have it stored in Pharo memory. Is it problematic when it comes to pass it by value ? Or should I manage the copying on the C heap to be safe ? Thomas.

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rethinking compilation notifications
by Tudor Girba Aug. 4, 2014

Aug. 4, 2014

Hi, The next stop in our little tour around code actions was the compilation notifications. Again, we used a popper interface to show the error without affecting the underlying text editor: [image: Inline image 2] You can find more details here: http://www.humane-assessment.com/blog/rethinking-compilation-notifications-… Please let us know what you think. Cheers, Doru -- www.tudorgirba.com "Every thing has its own flow"

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MooseTechnology failing again. Any way to download Moose Book?
by Offray Vladimir Luna CÃ¡rdenas Aug. 3, 2014

Aug. 3, 2014

Hi, These days, MooseTechnology.org has being failing continuously and I can not read any documentation on Moose browsers, except for the one in PBE2. There is any way to download this book to see it off-line, hopefully in pdf format? Thanks, Offray

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