September 2018 - Pharo-users

is class-side name setter used by the system
by Peter Uhnak Sept. 17, 2018

Sept. 17, 2018

Hi, is the class-side "name:" setter used by the system itself? Because I remember many times overriding it for my own needs and it never broke anything as far as I know... which makes it strange why it even exists (because it is a trap). Thanks, Peter

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[ANN] New Pharo 6.1 stable VM
by Esteban Lorenzano Sept. 17, 2018

Sept. 17, 2018

Hi, Following what I had in my todo list for when coming back from ESUG, I promoted a new stable VM for Pharo 6.1. This is the VM that has been tested during almost two months for Pharo 7.0, so it should be fine, but let me know if there is any problem. Esteban

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Where is the Software update menu in Pharo 7.0
by Rene Paul Mages (ramix) Sept. 17, 2018

Sept. 17, 2018

Hi all, This is probably an idiot interrogation : I can't see the "Software update" menu http://ramix.org/pharo/version-7.0/pharo.7.0.png My Machine is running Linux Mint 18.3 "Sylvia" Cinnamon (64 bits) and I am using the following Pharo package : PharoLauncher-linux-1.4-x64.zip Thanks for your help. -- All the best. Rene Paul Mages ( GnuPG_key 0x9840A6F7 ) http://renemages.wordpress.com/smalltalk/pharo/ http://www.linux-azur.org/ramix http://blog.pharo.fr

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overriding FileReference>>copyTo: behavior
by Peter Uhnak Sept. 17, 2018

Sept. 17, 2018

Hi, is there an API to copy a file that will override the target destination if it already exists? I was quite surprised that #copyTo: (and #copyAllTo:) will throw up when the target file already exists. Do I need to explicitly remove the file before copying / copy the contents instead? Thanks, Peter

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Gemstone as a service?
by Andy Burnett Sept. 16, 2018

Sept. 16, 2018

Hello, I was wondering if anyone offers GaaS? I would love to be able to just focus on writing code, and leave the system management to others. Gemstone does seem to offer a very complete package. Also, does anyone know what's happening with Pharocloud? The site is still running, but it seems to be very quiet. Cheers Andy

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Re: [Pharo-users] To get started with Gtoolkit and bloc
by Hilaire Sept. 16, 2018

Sept. 16, 2018

Ok, thanks for the tip. Hilaire Le 16/09/2018 Ã 00:02, Juraj Kubelka via Pharo-users a Ã©critÂ : > We are aware of this issue. Current workaround is to save and then quit without saving. -- Dr. Geo http://drgeo.eu

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Dynabook and competences
by Hilaire Sept. 12, 2018

Sept. 12, 2018

Hi, Some though on the teaching by competence pedagogic approach and the Dynabook: http://blog.drgeo.eu/post/2018/Teaching-by-competences Hilaire -- Dr. Geo http://drgeo.eu

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ZnClient receiving Expires header with Max-Age instead of HTTP formatted DateAndTime
by PAUL DEBRUICKER Sept. 11, 2018

Sept. 11, 2018

Hi Sven - This is in Pharo 6.1. There is an API I'm using which sometimes returns a string only containing a single instance of the number 0 in the "Expires" field, so the #expiresTimeStamp method sends that to #parseHttpDate: and since it can't be parsed into a date an error is thrown. Seems like Zinc should be able to handle that based on the spec here: https://tools.ietf.org/html/rfc7234#section-5.3 Would you rather I changed the implementation of parseHttpDate: to add an empty check on the parsed tokens e.g. parseHttpDate: string "self parseHttpDate: 'Tue, 13 Sep 2011 08:04:49 GMT'." "self parseHttpDate: 'Tue, 13-Sep-2011 08:04:51 GMT'." "self parseHttpDate: 'Tue Jan 01 00:00:01 2036 GMT'." | tokens day month year hour minute second months map yearToken | string size = 1 ifTrue:[ ^DateAndTime epoch ]. tokens := (string findTokens: #( $ $- $: $, )) allButFirst. ... Or add a string size guard check in #expiresTimeStamp ? e.g. expiresTimeStamp self expires ifNil: [ ^ DateAndTime now + 1 day ] ifNotNil: [ :exp | exp size = 1 ifTrue: [ ^ DateAndTime epoch ]. ^ ZnUtils parseHttpDate: exp ] Thanks Paul

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Re: [Pharo-users] ZnURL and parsing URL with diacritics
by Erik Stel Sept. 11, 2018

Sept. 11, 2018

Check out the following info: https://en.wikipedia.org/wiki/Internationalized_Resource_Identifier <https://en.wikipedia.org/wiki/Internationalized_Resource_Identifier> The REST API might be answering an IRI instead of an URI in which case it might not be faulty after all (I did not check the API myself). -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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legitimate values for ZnClient>>accept:
by Ben Coman Sept. 10, 2018

Sept. 10, 2018

Hi Sven, I had a sample http request specified to have ```Accept-Encoding: gzip``` and too a guess the following would work... ```client := ZnClient new accept: 'gzip' ``` but it doesn't since ZnClient>>accept: effectively does ``` 'gzip' asZnMimeType ``` which expects the string to contain a forward-slash However this page seems to indicate no slash is required... https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding If I call ```client request setAccept: 'gzip' ``` I am able to match what is expected (checked with WireShark) but I'm not sure the sample I was provided is legit or I'm doing something wrong cheers -ben

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Internet of Things in Smalltalk - meeting proposal
by CÃ©drick BÃ©ler Sept. 10, 2018

Sept. 10, 2018

Hi, We will have a meeting Tuesday afternoon on IoT at esug. More info later to see how we organize that. Should be after Â« show us your project Â» around 5 or 6 am. More info later especially on where the meeting will take place (might be around the beach). See you later for those interested (maybe answer there so that we can count and find an appropriate place). Cheers, Cedrick

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Re: [Pharo-users] ZnURL and parsing URL with diacritics
by Sven Van Caekenberghe Sept. 10, 2018

Sept. 10, 2018

It would probably help if you gave a real example, a REST call that returns something (presumable JSON or XML) that contains a URL that is problematic. FWIW, the following do also work ('https://en.wikipedia.org/wiki/' , 'ÄeskÃ¡ republika' urlEncoded) asUrl. ('https://en.wikipedia.org/wiki/' , 'ÄeskÃ¡ republika' urlEncoded) asUrl retrieveContents. > On 10 Sep 2018, at 14:16, Petr Fischer via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Petr Fischer <petr.fischer(a)me.com> > Subject: Re: [Pharo-users] ZnURL and parsing URL with diacritics > Date: 10 September 2018 at 14:16:53 GMT+2 > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > OK. Thanks for examples. But in my case, the bad URL (with diacritics) comes directly from the Zomato.com REST API (they probably do not read specs), so I'll end up with a few "hacks" with strings. > > pf > > >> Hi, >> >>> On 10 Sep 2018, at 12:53, PBKResearch <peter(a)pbkresearch.co.uk> wrote: >>> >>> Hi Petr >>> >>> I have used #urlEncoded in the past, with success, to deal with German umlauts. The secret is to urlEncode just the part containing the diacritics. If you encode the whole url, the slashes are encoded, and this confuses Zinc, which segments the url before decoding. >>> >>> So I would expect you to be able to read your file with: >>> >>> ZnEasy get: 'http://domain.com/â,âÄÅ¡ÄÃ½Å¾.html' urlEncoded. >>> >>> However, this also fails with âASCII character expectedâ, and I canât understand why. The debug trace has too many levels for me to understand. Zinc is evidently getting in a mess trying to decode the urlEncoded string, but if we try: >>> >>> âÄÅ¡ÄÃ½Å¾.html' urlEncoded urlDecoded >>> >>> as a separate operation, it works OK. >>> >>> I think only Sven can explain this for you. >> >> The external representation of a URL with special characters is not the same as what an address bar or browser search field accepts. The latter is quite intelligent and accepts much broader input. >> >> ZnUrl parses the official external representation according to the spec. >> >> Internally, ZnUrl represents all components as resolved strings. The solution is to construct difficult/special URLs by hand. >> >> Here is an example: let's say we want to access the English Wikipedia page of the Czech Republic (the country) using its native name 'ÄeskÃ¡ republika' (which is not only non-ASCII, but non-Latin1 as well, so it needs a WideString and UTF-8 encoding). >> >> Here is one way to construct such a string. >> >> ZnUrl new >> scheme: #http; >> host: 'en.wikipedia.org'; >> addPathSegment: 'wiki'; >> addPathSegment: 'ÄeskÃ¡ republika'; >> yourself. >> >> Which gives a URL with the following external representation: >> >> http://en.wikipedia.org/wiki/%C4%8Cesk%C3%A1%20republika >> >> This can be parsed without problems. >> >> 'http://en.wikipedia.org/wiki/%C4%8Cesk%C3%A1%20republika' asUrl. >> >> You can send #retrieveContents to a URL to actually fetch it. >> >> ZnUrl new >> scheme: #http; >> host: 'en.wikipedia.org'; >> addPathSegment: 'wiki'; >> addPathSegment: 'ÄeskÃ¡ republika'; >> retrieveContents. >> >> Or you could use the url in a ZnClient object. >> >> BTW, there are many ways to construct URLs, I would maybe do the following. >> >> 'https://en.wikipedia.org/wiki' asUrl addPathSegment: 'ÄeskÃ¡ republika'; yourself. >> >> Or something like >> >> ZnClient new >> url: 'https://en.wikipedia.org/wiki'; >> addPathSegment: 'ÄeskÃ¡ republika'; >> get. >> >> HTH, >> >> Sven >> >>> HTH >>> >>> Peter Kenny >>> >>> >>> From: Pharo-users <pharo-users-bounces(a)lists.pharo.org> On Behalf Of Petr Fischer via Pharo-users >>> Sent: 10 September 2018 10:07 >>> To: pharo-users(a)lists.pharo.org >>> Cc: Petr Fischer <petr.fischer(a)me.com> >>> Subject: [Pharo-users] ZnURL and parsing URL with diacritics >>> >>> Hello, >>> >>> when I try to parse this URL asUrl, error "ZnCharacterEncodingError: ASCII character expected" occurs: >>> >>> 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' asUrl. >>> >>> this also does not work: >>> >>> ZnEasy get: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' >>> >>> How to solve this? In the web browser, URL with diacritics is OK. >>> >>> I tried also this: >>> >>> ZnEasy get: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' urlEncoded. >>> >>> but this cripples the whole URL. >>> >>> Thanks! Petr Fischer >> >> > > >

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Re: [Pharo-users] ZnURL and parsing URL with diacritics
by PBKResearch Sept. 10, 2018

Sept. 10, 2018

Hi Petr I have used #urlEncoded in the past, with success, to deal with German umlauts. The secret is to urlEncode just the part containing the diacritics. If you encode the whole url, the slashes are encoded, and this confuses Zinc, which segments the url before decoding. So I would expect you to be able to read your file with: ZnEasy get: 'http://domain.com/','ÄÅ¡ÄÃ½Å¾.html' urlEncoded. However, this also fails with 'ASCII character expected', and I can't understand why. The debug trace has too many levels for me to understand. Zinc is evidently getting in a mess trying to decode the urlEncoded string, but if we try: 'ÄÅ¡ÄÃ½Å¾.html' urlEncoded urlDecoded as a separate operation, it works OK. I think only Sven can explain this for you. HTH Peter Kenny From: Pharo-users <pharo-users-bounces(a)lists.pharo.org> On Behalf Of Petr Fischer via Pharo-users Sent: 10 September 2018 10:07 To: pharo-users(a)lists.pharo.org Cc: Petr Fischer <petr.fischer(a)me.com> Subject: [Pharo-users] ZnURL and parsing URL with diacritics Hello, when I try to parse this URL asUrl, error "ZnCharacterEncodingError: ASCII character expected" occurs: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' asUrl. this also does not work: ZnEasy get: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' How to solve this? In the web browser, URL with diacritics is OK. I tried also this: ZnEasy get: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' urlEncoded. but this cripples the whole URL. Thanks! Petr Fischer

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ZnURL and parsing URL with diacritics
by Petr Fischer Sept. 10, 2018

Sept. 10, 2018

Hello, when I try to parse this URL asUrl, error "ZnCharacterEncodingError: ASCII character expected" occurs: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' asUrl. this also does not work: ZnEasy get: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' How to solve this? In the web browser, URL with diacritics is OK. I tried also this: ZnEasy get: 'http://domain.com/ÄÅ¡ÄÃ½Å¾.html' urlEncoded. but this cripples the whole URL. Thanks! Petr Fischer

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memorizing data between tests
by Ben Coman Sept. 9, 2018

Sept. 9, 2018

Say I want to write ten tests for different aspects of a web service point. Apart from the risk of relying on an external service, I'd like to poll the web service once rather than ten times. I wondering about the feasibility of memorizing data between test methods. Taking for example... TestCase subclass: #MyTest ... My understanding is that MyTest >> setUp is run once per test method. What I guess is missing is a #groupSetup that would be called at the start of a running a group of tests. MyTest >> groupSetup memorized := Dictionary new. MyTest >> getLiveDataOncePerRun ^ memorized at: 'data' ifAbsentPut: [ZnClient new get: ' http://someservice.com/liveData1'. MyTest >> test1 |data| data := self getLiveDataOncePerRun . self assert: data result1 equals: 'expected result 1' MyTest >> test2 |data| data := self getLiveDataOncePerRun. self assert: data result2 equals: 'expected result 2' cheers -ben

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Re: [Pharo-users] Ready to use Roassal?
by Hilaire Sept. 9, 2018

Sept. 9, 2018

Hello Alexandre, Afterward, I have indicated that to this non-pharo user. Le 09/09/2018 Ã 11:36, Alexandre Bergel via Pharo-users a Ã©critÂ : > The agilevisualization.com website says: > > "Installing Roassal is easy. You need to install Pharo. Open the Catalog browser, and select Roassal. A video illustrating these steps is online.â > > How can I improve the installation instruction? > > Also, the Quickstart chapter details the steps: > http://agilevisualization.com/AgileVisualization/QuickStart/0101-QuickStart… I was confused as I did not find this zip file ready to download, as described in this quick start page. Hilaire -- Dr. Geo http://drgeo.eu

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Pharo and Docker (some steps)
by Torsten Bergmann Sept. 9, 2018

Sept. 9, 2018

For those interested in Docker: I recently played with Pharo and Docker and summarized some of my steps in a small tutorial in my Pharo wiki: http://wiki.astares.com/pharo/613 There is also a page following Mike Filonovs suggestions on the Pharo docker file: http://wiki.astares.com/pharo/615 Maybe this is useful for others too. Bye T.

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Ready to use Roassal?
by Hilaire Sept. 9, 2018

Sept. 9, 2018

Hi, Is there a ready to download and to use Roassal for end user? I found nothing on http://agilevisualization.com/ I can point a user to. User unaware of Pharo, Smalltalk, etc. Closest things I found is http://moosetechnology.org/#install. And likely instructions will not work for a linux user. Thanks Hilaire -- Dr. Geo http://drgeo.eu

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Sept. 8, 2018

Hi all, Just to inform that a Camp Smalltalk will be at the terrace of the CaffÃ¨ delle Arti starting at 10am. CaffÃ¨ delle Arti Via del Fossario, 1, 09124 Cagliari CA, Italie +39 392 396 3958 https://goo.gl/maps/WMRhdSCeZL62 Feel free to join

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Re: [Pharo-users] CampSmalltalk
by Joachim Tuchel Sept. 8, 2018

Sept. 8, 2018

Waiting at the baggage claim ;-) > Am 08.09.2018 um 05:41 schrieb Sebastian Heidbrink <sheidev(a)yahoo.de>: > > Hi! > > I just found out that there is a dedicated ESUG mailing list.... ta taa! > > I arrived in Cagliari for ESUG 2018 and I am wondering where CampSmalltalk will take place this weekend. > > Anybody in town already? > > CU! > > Kind wishes, > > Sebastian > > > >

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Periodic long GC's when just coding in newer Pharo 7's?
by Tim Mackinnon Sept. 8, 2018

Sept. 8, 2018

I thought I would mention this as its something Iâve only just started to noticeâ¦ when doing some brief coding sessions (as in, each day I unsuspend my laptop and code for 30-40 minutes - to write some missing tests) - I have started to notice I get a spinning beach ball in Pharo for 15+ seconds and then it recovers. Itâs usually once each day, and it does recover. It feels like its deciding to do a GC - but Iâm not sure how to tell. It could be nothing - but its not something Iâve noticed in Pharo 6.1 and seems unique to Pharo 7 (which Iâve started to try using more recently). Its just happened now in build 1167 64bit on OSX (I believe I have the newer vm - as I had to re-download them for pharo-launcher). Tim

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CampSmalltalk
by Sebastian Heidbrink Sept. 8, 2018

Sept. 8, 2018

Hi! I just found out that there is a dedicated ESUG mailing list.... ta taa! I arrived in Cagliari for ESUG 2018 and I am wondering where CampSmalltalk will take place this weekend. Anybody in town already? CU! Kind wishes, Sebastian

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PetitParser map
by Hartmut Krasemann Sept. 7, 2018

Sept. 7, 2018

Hi, I work a lot with PetitParser in Pharo 5 and fail to display the parser map in PPBrowser. The config is Pharo 5Â with - PetitParser (JanKurs.278) and - Roassal2 (AlexandreBergel.1638) as installed from the Pharo Project Catalog A first problem, occuring on selection of a Parser in PPBrowser was fixed easily: GLMCompositePresentation>>smalltalkCodeÂ Â -> >>pharoMethod But I am lost to fix the second problem on displaying the parser map in PPBRowser. PPParserBrowser>>mapInÂ Â tries to execute RTMondrianViewBuilder new but RTMondrianViewBuilder does not exist What can I do there? -- signatur Hartmut Krasemann KÃ¶nigsberger Str. 41 c D 22869 Schenefeld Tel. 040.8307097 Mobil 0171.6451283 Krasemann(a)acm.org

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Re: [Pharo-users] [Moose-dev] Pharo eye-candy: Domain-Specific Modeling and Simulation
by Nick Papoylias Sept. 7, 2018

Sept. 7, 2018

Thanx Alex :) Looking forward to the Roassal talk on Thursday ! On Fri, Sep 7, 2018 at 5:22 PM Alexandre Bergel via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > Wow!!!!! > You guys rock! > > Alexandre > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > On Sep 6, 2018, at 2:17 PM, Nick Papoylias <npapoylias(a)gmail.com> wrote: > > A nice example of how Pharo can be used for > domain-specific modeling and simulation. Short > session from one of our projects at Rochelle: > > https://www.youtube.com/watch?v=Z7wJNhAIaVQ > > Some additional info here: https://goo.gl/jS4NjB > > Currently investigating how to incorporate the new Bloc based > widgets of @feenkcom into the workflow. > > Cheers, > > Nick > _______________________________________________ > Moose-dev mailing list > Moose-dev(a)list.inf.unibe.ch > https://www.list.inf.unibe.ch/listinfo/moose-dev > > >

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Pharo eye-candy: Domain-Specific Modeling and Simulation
by Nick Papoylias Sept. 7, 2018

Sept. 7, 2018

A nice example of how Pharo can be used for domain-specific modeling and simulation. Short session from one of our projects at Rochelle: https://www.youtube.com/watch?v=Z7wJNhAIaVQ Some additional info here: https://goo.gl/jS4NjB Currently investigating how to incorporate the new Bloc based widgets of @feenkcom into the workflow. Cheers, Nick

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