- Pharo-users - lists.pharo.org

Re: [Pharo-users] uFFI ExternalAddress challenges
by TomaÅ¾ Turk Sept. 17, 2019

Sept. 17, 2019

> We are interested in it :) > If I recall well Pablo got one version somewhere. Me too :-) Unfortunately, I only have time for 'weekend' projects, and any help is appreciated :-) Regarding the uFFI calls, is it possible to pass Win32WideString in a similar fashion as a String - or where to look to implement that? Best wishes, Tomaz

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Re: [Pharo-users] Could not resolve ConfigurationOfJSON
by Offray Vladimir Luna CÃ¡rdenas Sept. 16, 2019

Sept. 16, 2019

Hi Todd, Thanks for your interes in Grafoscopio. I would like to know more about your project and your feedback on how Grafoscopio suited your project (or not) is pretty valuable, so keep me posted. Grafoscopio should be working with Pharo 7, but I have been recently updating documentation that still doesn't end in the User Manual (but is already linked to SmalltalkHub and the English web page). Did you tried the procedure on: https://mutabit.com/repos.fossil/grafoscopio/doc/tip/readme.md.html#overvie… Let us know how the installation goes with those instructions. After that, the Panama Papers example should be available from the `Grafoscopio > Help & Docs > Dataviz` submenu, at the top bar (you may need to update Documentation and the Dataviz package before, from the `Grafoscopio > Update` menu). Cheers, Offray On 15/09/19 2:06 p.Â m., Todd Blanchard via Pharo-users wrote:

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Could not resolve ConfigurationOfJSON
by Todd Blanchard Sept. 15, 2019

Sept. 15, 2019

Trying to check out Grafoscopio and I keep running into this error. Tried with Pharo 5 and 7. Any suggestions?

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uFFI ExternalAddress challenges
by TomaÅ¾ Turk Sept. 11, 2019

Sept. 11, 2019

Dear all, I'm struggling with passing an ExternalAddress to a c function call with uFFI. Firstly, I get the ExternalAddress from this method: myFFI>>create: aString ^ self ffiCall: #(void * CreateObject (String aString) ) [in c: void* CreateObject(char* szProgId)] The method that uses the resulting ExternalAddress is defined as: myFFI>>ask: anExternalAddress ^ self ffiCall: #(void CallMethod (void * anExternalAddress) ) [in c: void CallMethod(void* myObj)] In playground I have | w | w := myFFI create: 'Word.Application'. myFFI ask: w . w gets a "nice", properly looking external address, however the last line crushes Pharo, its window gets closed. I went through the uFFI book, however I cannot find the answer. I'm on Windows 10 x64, Pharo 7.0.4 32-bit. Best wishes, Tomaz

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The most upvoted stackoverflow question - also holds for Pharo
by Kasper Ãsterbye Sept. 11, 2019

Sept. 11, 2019

The most upvoted question/answer on stackoverflow is this one: https://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-arr… I wanted to see if the results could be reproduced in Pharo, and indeed they can (though I only get a factor 2-3 difference). The following method does the trick: branchPrediction | size data rnd sum start | size := 32768. data := ByteArray new: size. rnd := Random new: 0. 1 to: size do: [ :i | data at: i put: (rnd nextInt: 256) - 1 ]. âsorting the array makes the loop faster" data sort. sum := 0. start := DateAndTime current. 10000 timesRepeat: [ 1 to: size do: [ :i | (data at: i) > 128 ifTrue: [ sum := sum + (data at: i) ] ] ]. ^ {(DateAndTime current - start) asMilliSeconds. sum} Though it is old news, it is still kind of cool. Best, Kasper

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..LCK
by ian Sept. 10, 2019

Sept. 10, 2019

Hi All, I am not able to start my stone as I inadvertantly deleted the ..LCK file. :) Is there a way to fix this? Thanks,

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Set >> collect:thenDo:
by Herby VojÄÃk Sept. 10, 2019

Sept. 10, 2019

Hello! ---- (#(1 2 3) asSet collect: #odd) do: [ :each | Transcript show: each; cr ] > true > false ---- #(1 2 3) asSet collect: #odd thenDo: [ :each | Transcript show: each; cr ] > true > false > true ---- Bug or feature? Herby

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uFFI Structure Problem
by Georg Hagn Sept. 9, 2019

Sept. 9, 2019

I have to implemet following external structure (extrakt from the german api Doku): typedef struct { /**@brief MUST be always 2. */ uint32_t version; /** @brief Pointer to KeyStore -- Verweis auf den KeyStore, see EricGetHandleToCertificate(). */ EricZertifikatHandle zertifikatHandle; /** @brief PIN fÃ¼r den KeyStore.*/ const char *pin; /** * @brief MUST be NULL in my context Dieser muss ... In allen anderen FÃ¤llen muss hier NULL Ã¼bergeben werden. Der Parameter abrufCode besteht aus 2 x 5 Zeichen, die mit "-" verbunden sind. Beispiel: "K6FG5-RS32P" */ const char *abrufCode; } eric_verschluesselungs_parameter_t; My Problem is, that i have to assign a NULL - value to the attribute abrufCode. I have tried varies possibilities but I get always the error, that the attribute abrufCode must have the value NULL. " Extract from log-file: 019-09-05 17:08:52,257709[0x00007fe036a2f050] ERROR: FÃ¼r die Ã¼bermittelte Datenart ist die Angabe eines Abrufcodes nicht zulÃ¤ssig, daher muss fÃ¼r den Abrufcode der Wert NULL Ã¼bergeben werden. 610001029" How do I assign a NULL value to an attribute in a FFIExternalStructure? Following my last attempt (extracted from the Pharo Booklet Colletion "Calling Foreign Functions with Pharo May 31,2018") I assign values not directly with the generated attributes but with "api???" attributes. FFIExternalStructure subclass: #ERiCVerschluesselungsParameter instanceVariableNames: '' classVariableNames: 'OFFSET_ABRUFCODE OFFSET_PIN OFFSET_VERSION OFFSET_ZERTIFIKATHANDLE' package: 'Bajoras-ERiC'! ERiCVerschluesselungsParameter class >> fieldsDesc [ "ERiCVerschluesselungsParameter rebuildFieldAccessors" ^ #( uint32 version; ERiCZertifikatHandle * zertifikatHandle; char * pin; char * abrufCode; ) ] ERiCVerschluesselungsParameter >> initialize [ self apiVersion: 2; apiAbrufCode: nil; apiPin: 'mySecret'. ] ERiCVerschluesselungsParameter >> accessorMethods for: pin, version, abrufCode, zertifikatHandle ("This method were automatically generated") ERiCVerschluesselungsParameter >> apiAbrufCode: aCode [ | codeSize anAbrufCode | codeSize := 11. anAbrufCode := FFIExternalArray externalNewType: 'char' size: codeSize. 1 to: codeSize do: [ :idx | anAbrufCode at: idx put: Character null ] . aCode ifNotNil: [ aCode doWithIndex: [ :char :i | anAbrufCode at: i put: char ]. ]. self abrufCode: anAbrufCode. ] ERiCVerschluesselungsParameter >> apiPin: aPin [ | newPin | newPin := FFIExternalArray externalNewType: 'char' size: aPin size. aPin doWithIndex: [ :char :i | newPin at: i put: char ]. self pin: newPin. ] ERiCVerschluesselungsParameter >> apiVersion: aVersion [ | cryptoVersion | cryptoVersion := 2. self version: cryptoVersion. ] Thanks, Georg Hagn

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Best Practices for Adapting JSON based APIs
by Eric Gade Sept. 8, 2019

Sept. 8, 2019

Hello all, Several times in the past couple of years I've found myself attempting to create objects that incorporate/adapt a given APIs specification -- in other words, building a mini, pharo based SDK for the given API. These are always JSON based APIs. I am not sure what the best practices are for doing this and am looking for some wisdom from this list. I have a few questions: 1. When passing around JSON-based objects for a given API, is it better to work with Dictionaries or to create (for example) specific objects for specific kinds of JSON objects in the API -- ie for Stripe, would you just work with objects that read and parse Dictionaries or implement Transaction, User, CreditCard objects, etc, etc? 2. If you create objects for each kind of entity rather than using dictionaries, what do you do in the (rather common) case where the API specification allows for a lot of malleability in a given JSON object that gets passed in for a given kind of request? Often times there can be arbitrary, non-required key-value pairs set by the user for a given transaction/request/whatever on the JSON object. I'm not sure how this would translate to Pharo objects, especially if we are creating a method-per-key 3. Do you create a method per what would be a key in the spec's JSON object? 4. If a given API spec is itself written in JSON, do we have some way of "automatically" creating the equivalent objects in Pharo (since both are machine readable)? I am currently considering developing a bare-bones proof of concept package for making a Matrix Client <https://matrix.org/docs/spec> but I'm a bit flummoxed about how to proceed, since there seem to be many ways to do this -- some that might be worse than others for testing, abstraction, etc, etc. Any advice is much appreciated. Thanks! -- , Eric

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Pharo Branding Organization on GitHub
by Torsten Bergmann Sept. 5, 2019

Sept. 5, 2019

Hi, the Pharo community is growing and our lovely Pharo system is an innovation driver with cool tools and projects but it is also used in real projects in research and business setups. There are still many entries left on all our TODO lists - not only in shaping the next stable Pharo release(s) but also in bringing more attention to people about what Pharo is all about. A few of us already follow a well know marketing phrase: âDo good and talk about it!â as some report about Pharo news in BLOGS, on TWITTER or by writing articles on MEDIUM.com or even books. I also like that we have a growing number of YOUTUBE videos about Pharo. We also have a regular Newsletter - even a Facebook page, ... This gives visibility to Pharo activities and is already a good step in doing some advertising. An additional important lesson in successful marketing is that one has to give a homogenous "Brand Identity" to a project or product to be easily recognizable and rememberable over time. We already have the nice lighthouse and use it all over - but often it is hard to find the logo or other marketing material in correct size or correct graphics format. We should improve on that side too. As we work mostly with git I therefore now have setup a new organization "pharo-brand": https://github.com/pharo-brand that should give easy access and group existing branding material in one place. The site now already includes the following three projects: 1. pharo-brand-material This should be the place for "logo" and "logo-flat". In the subdirectories you will find the logo in three different variations: - logo composed of text + icon + beacon - logo composed of icon + beacon - logo beacon only including subdirectories for "vector" (like SVG, PDF) and "screen" formats (like PNG, BMP, ...) 2. pharo-github-images These are the Icons i created for the various github organizations like - https://github.com/pharo-project - https://github.com/pharo-nosql - https://github.com/pharo-rdbms - https://github.com/pharo-contributions - https://github.com/pharo-brand and a template for additional ones 3. pharo-jingle A jingle is a short song or tune used in advertising. Jingles are a form of sound and or video branding - when you see it often as an intro or outro you will more easily remember the brand name (Pharo in this case). This repository includes a "Pharo jingle" that can be used as a start or end section within own custom videos about Pharo and related projects. The short video jingle was created using a free video software called OpenShot using a sound jingle from freesound.org - Pharo_HDV720_24p_1280x720.mp4 - Pharo_HDV1080_25p_1920x1080.mp4 - Pharo_HDV1440_25p_1440x1080.mp4 Note that the jingle is currently a proposal - if you have better ones we can discuss it within the community on the mailinglist. I hope the repos will improve a little bit the situation in finding and organizing the brand material. Feel free to comment and give feedback or even add marketing material (templates, icons or other) yourself to the repos. Thanks T.

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