November 2014 - Pharo-users

CI down local time 17h-tomorrow
by Marcus Denker Nov. 25, 2014

Nov. 25, 2014

Hi, Ci will be down local time 1700 till tomorrow: > A maintenance of the storage infrastructure is planned on 2014/11/25 from > 5pm to 11pm. In order to avoid issues, you are strongly encouraged to shut > down the virtual machines of your project before 5pm. > After that, the remaining virtual machines will be shut down by the IT > team.

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Named edges and nodes in a Roassal graph
by Offray Vladimir Luna CÃ¡rdenas Nov. 24, 2014

Nov. 24, 2014

Hi all. We're now in a small workshop about data narratives and I'm showing some people Roassal. I would like to have named nodes and edges in a graph. I have created a small understable graph from the object profile gallery here: http://ws.stfx.eu/8QMELFJ4V370 Anyone knows how to add names to edges and nodes in this graph? If I could have a quick answer on this one would be awesome. By the way I'm now 5:50 pm (GMT-5) in the pharo irc channel is someone pops up. Thanks, Offray

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layout and other potential class-side variables
by Peter UhnÃ¡k Nov. 23, 2014

Nov. 23, 2014

So I accidentally assigned some content to 'layout' variable in class side and realized much later that it has overridden some Slot's FixedLayout. Looking up the inheritance chain (Object & ProtoObject) I couldn't find anything so I don't know where is this coming from or how it is added there. But most importantly: are there more variable names that I should be aware of that could get accidentally overridden? Thanks, Peter

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question on syntax "negate numbers"
by Nicolai Hess Nov. 22, 2014

Nov. 22, 2014

Old compiler refuses to accept this code: - 4 @ -5 ^-- nothing more expected Opal compiler does just fine: - 4 @ -5 -> (-4@ -5) who is right?

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Maps from Wikipedia loaded on Roassal's RTMetricMap
by Offray Vladimir Luna CÃ¡rdenas Nov. 22, 2014

Nov. 22, 2014

Hi, This Thursday and Saturday we will have a small workshop on data storytelling and I would like to present Pharo/Roassal to the people there as a tool for creating and sharing visualizations. My idea is to use Playgrounds to make agile visualization and then share them using cloud sharing at stfx and etherpads. The maps I would like to make are similar to the ones that have colored countries [1][2], but using internal country geopolitical divisions. For the case of Colombia I would like to use the ones of [3], specifically something like [4] and use the same syntax of RTMetricMap inside the country. [1] http://bit.ly/1yiedrE [2] http://bit.ly/1xTAQV0 [3] https://commons.wikimedia.org/wiki/User:Shadowxfox/Maps#Colombia [4] https://commons.wikimedia.org/wiki/File:Colombia_departamentos_otros.svg So my question is: - There is any way to upload this SGV maps and treat them as the maps already in RTMetricMap, telling the names of the internal geopolitical divisions inside a Country and how to color them according to a value and make them zoomable? - Where can I start to look to support this feature? Notice that this tries to be a leaner approach to the one I had already asked about importing maps from open street map. Thanks, Offray

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Glorp and DBXTalk
by Torsten Bergmann Nov. 21, 2014

Nov. 21, 2014

>quick question, how can I get Glorp for Pharo? And DBXTalk? >If anyone can provide me with some links it will be much appreciated Did you see this article from Sven: https://medium.com/@svenvc/reddit-st-in-10-cool-pharo-classes-1b5327ca0740 Code is loadable in Pharo 3.0 also from config browser ("Reddit") where the ConfigurationOfReddit also loads Glorph I guess. Thx T.

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How do I
by Friedrich Dominicus Nov. 21, 2014

Nov. 21, 2014

get the red color from the editor if aa methods gets really long. Eg I have an initialization of a dictionary with 50 or so elements and have put them into one method of course it's getting very red. Anyway it's just something like this add: Element add: anotherElement .... So no program logic at all just one element added after the other. I found I can still lint with a pragma, but still the editor is "red" That really gets on my nerves. So what can I do to stop this "reddening"? Regards Friedrich

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[ANN] Hubcap - a SmalltalkHub API and browser for Pharo
by Torsten Bergmann Nov. 21, 2014

Nov. 21, 2014

Hi, as I wanted to browse the SmalltalkHub contents directly from within Pharo image I wrote a simple browser: Gofer it url: 'http://www.smalltalkhub.com/mc/TorstenBergmann/Hubcap/main'; configurationOf: 'Hubcap'; loadDevelopment. Attached is a screenshot. Works on Pharo 4.0. Still not finished but maybe it is already useful to others as well. One can access the tool from the world menu, implementation lives in "Hubcap-Tools" package. The UI shows and allows to filter users, shows their projects and packages. Special icons display the state (loaded, modified, public writable, ...). One can load from the UI or open Monticello tools. The "Hubcap-Core" package includes an API to query STHub and write expressions like: HubClient new allProjectsForUserNamed: 'TorstenBergmann' HubClient new hasUserNamed: 'TorstenBergmann' So "Hubcap-Core" may be usefull to people who want to build other tools that depend on STHub infos. Basic documentation lives on http://www.smalltalkhub.com/#!/~TorstenBergmann/Hubcap and as class comment on ConfigurationOfHubcap. Beware: the tool is sill not optimized, any clicking involves a query to STHub (hope STHub will not crash when many people use it). API may still undergo changes in the future. Also teams are not yet supported as STHub still returns an MNU error in the REST interface: http://www.smalltalkhub.com/hub/teams?term=Pharo Anyone able to fix that? Thanks to Stephan Eggermonts who gave me the initial idea with some code I've found in "Deprecation finder" and to Sven for the easy to use NeoJSON package. Contributors can just commit, the project is public. Bye T.

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Pharo Consultants Page Updated
by Sven Van Caekenberghe Nov. 21, 2014

Nov. 21, 2014

Hi, The Pharo Consultants page has been updated, it now contains 17 entries. http://consultants.pharo.org Sven

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Kiviat support in Roassal
by Alexandre Bergel Nov. 20, 2014

Nov. 20, 2014

Hi! Pierre just finished a first version of Kiviat in Roassal. Here are some example: -=-=-=-=-=-=-=-=-=-=-=-=-=-=-= b := RTKiviatBuilder new. b objects: RTAbstractCircleLayout withAllSubclasses. n := RTMultiLinearColorForIdentity new objects: (b objects). b shape circle color: [ :value | n rtValue: value named]; size: 10. b addMetric: #numberOfLinesOfCode. b addMetric: #numberOfMethods. b addMetric: #numberOfVariables. b activatePolygons. b build. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-= It would be great to have feedback on this! Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Pharo and ODBC
by olivier auverlot Nov. 20, 2014

Nov. 20, 2014

Hi, I try to use the ODBC framework presents in the configurations list and named "ODBC (TorstenBergmann.5)" I want connect Pharo to a Postgresql server and I installed the latest version of the ODBC driver. The datasource is configured as system datasource. The connection test is ok. My computer uses Windows 7 64 bits. In Pharo, I try to connect with the following code: connection := ODBCConnection dsn: 'mysource' user: 'myuser' password: 'mypassword'. connection close. The connection fails and I get an error message: "The data source (DSN) has a specified architecture incompatibility between the driver and the application". Someone have an idea about this problem ? Someone works with the ODBC solution ? Best regards Olivier

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How to decide if a name can be used as a name for a new class?
by Stephan Eggermont Nov. 19, 2014

Nov. 19, 2014

I found isLegalClassName, but that has interesting properties 'Object' isLegalClassName false 'Bla' isLegalClassName false 'One sentence' isLegalClassName false. Stephan

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PharoS VM
by Rafael Luque Nov. 19, 2014

Nov. 19, 2014

Another noob question. What's the difference between these two options I see in get.pharo.org? get.pharo.org/vmLatest This script downloads the latest Pharo VM. get.pharo.org/vmSLatest This script downloads the latest PharoS VM. Thank you. Rafael Luque

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Building 64-bit pharo VM
by Evan Donahue Nov. 19, 2014

Nov. 19, 2014

Hello, I am working on building a 64-bit pharo vm to open large files, as per a previous question to the list. I have gone down a few roads from different dates and with different basic strategies and met with little success so far. Could someone recommend the best place to look for the vm build instructions that would be the closest fit to building a current pharo vm for pharo4 in 64 bits on a 64 bit arch linux os? Thanks, Evan

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How to fileIn a string content
by Hilaire Nov. 19, 2014

Nov. 19, 2014

Hello, String streamContents: [:out | DrGeoScriptXXX fileOutOn: out] works well to fileout a class in a sring. How can I do the opposite operation: filein this string to instantiate the class represented in such a string? I did not find out Thanks Hilaire -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

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Re: [Pharo-users] running out of memory while processing a 220MB csv file with NeoCSVReader - tips?
by Stephan Eggermont Nov. 18, 2014

Nov. 18, 2014

Alain wrote: >you are saying that zip ratio is somewhat related to normalized data, >interesting view, and certainly true :) I find it a nice heuristic to help me get started. Just sort the tables on size, start compressing them and start with ones compressing best. >About DateTimes, I think this is not different than with other values, >using a pointer to an interned value should be equivalent to using an >int, as it would be a 32 bits pointer, and with this approach, using >compact records should not make a big difference too if there is not a >lot of different values. Combining multiple booleans in one word still helps a lot, and introducing extra objects for highly correlated fields. >The key I mentioned here is that in real life, this "normalizing ratio" >is very high for almost every kind of data and that's what puzzles me >(not the technique). My impression is that the a lot of the design decisions for relational databases are cargo cult based on the time where most database did not fit into ram and the query optimizers were not good at dealing with lots of joins. Stephan

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[ANN]: NewExternalWebBrowser
by Sean P. DeNigris Nov. 18, 2014

Nov. 18, 2014

Not too long ago, someone requested the ability to open a URL in an external browser. Now that Pharo has NativeBoost, it seems we could implement ExternalWebBrowser much more simply. Here's a first commit for Mac OS X. Gofer it smalltalkhubUser: 'SeanDeNigris' project: 'SeansPlayground'; package: 'NewExternalWebBrowser'; load. 'http://google.com' asUrl open. ----- Cheers, Sean -- View this message in context: http://forum.world.st/ANN-NewExternalWebBrowser-tp4788403.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Re: [Pharo-users] 'function unavailable' when calling OpenDBXDriver for MySQL
by Stephan Eggermont Nov. 17, 2014

Nov. 17, 2014

Hi Brad, You don't tell us if your MySQL is 32 bit? Stephan

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Re: [Pharo-users] running out of memory while processing a 220MB csv file with NeoCSVReader - tips?
by Stephan Eggermont Nov. 17, 2014

Nov. 17, 2014

Open package contents on your vm, open Contents, take a look at the info.plist <key>SqueakMaxHeapSize</key> <integer>541065216</integer> That value needs to be increased to be able to use more than ~512 MB. Alain wrote: >Let say it's your current requirement, and you want to do it like that, >a trick that may help you : during personal experiments about loading >data in memory and statistics from databases, I found that most often 70 >to 80 % of real data is the same. It is easy to confirm if this is the case in your data: just zip the csv file. Reasonably structured relational database output often reduces to 10% of size. With explicitly denormalized data I've seen 99% reduction. In addition, DateAndTime has a rather wasteful representation for your purpose. Just reduce to one SmallInt, or with Pharo4, use slots to get a more compact record representation. Stephan

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Opentalk or remoting libraries
by Annick Fron Nov. 17, 2014

Nov. 17, 2014

Hi, Are there some libraries in pharo to do remote calls like in Opentalk or Corba ? Annick

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'function unavailable' when calling OpenDBXDriver for MySQL
by bsselfridge＠gmail.com Nov. 17, 2014

Nov. 17, 2014

I've used the instructions defined on the "http://dbxtalk.smallworks.eu/" website to setup the OpenDBXDriver for a MySQL database. When I try to make a connection to the database, I'm getting the "function unavailable". I have this working on a Ubuntu 14.04 32bit OS. I'm wondering if my problem is my 64bit Ubuntu or do I have other problems. My setup: Ubuntu 14.04 64bit. Pharo 3.0 libopendbx.so.1.2.0 i386 version Brad Selfridge ----- Brad Selfridge -- View this message in context: http://forum.world.st/function-unavailable-when-calling-OpenDBXDriver-for-M… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Nov. 17, 2014

There is an annoying error in MultiByteFileStream, reading back when you have a unicode character. It is also the cause of some FileOut errors. Your can reproduce it this way: testString := 'abcdÃ©'. filename := 'test.txt'. filename asFileReference ensureDelete. filename asFileReference writeStreamDo: [ :stream | stream nextPutAll: testString ]. f := 'test.txt' asFileReference readStream. f setToEnd. f skip: -1. f peek. Any ideas how to solve it? Avoiding reading back is not an option ;). Maybe making skip to go back one more byte to check if there is a unicode character around?. Thanks a lot.

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Re: [Pharo-users] pharo consultants
by Stephan Eggermont Nov. 17, 2014

Nov. 17, 2014

Norbert wrote: > I forgot how people can add themselves. I remember a smalltalk snippet that one can send around to update the list. That doesn't run automatically. There are already some updates waiting. Stephan The script looks like: PharoConsultant new name: âStephan Eggermont'; location: 'Den Bosch, The Netherlands'; email: 'stephan(a)legacycode.nl'; website: 'http://www.legacycode.nl'; languages: 'Dutch (native), English, German'; industryExperienceSince: 1994; smalltalkExperienceSince: 2005; pharoExperienceSince: 2008; areasOfExpertise: 'Legacy Code Refactoring & Migrations, Small Business Applications, Improving Software Development'; yourself

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Polygons in woden
by Nicolas Lusa Nov. 17, 2014

Nov. 17, 2014

Hi everyone, I am working on some 3d representation and I am trying to draw 3D polygons with woden. I actually manage to make "the walls" but I still have to implement top and bottom parts which are not so simple since the shape can be really different from case to case. How I am actually doing it is with: WDGeometryBuilder adding vertices with addP: N: C: TC: messages and with addQuadI1: i2: i3: i4: Furthermore I have some issues with the shadows which actually don't appear. You can see a current polygon created with the code that I made in the attached image. (also notice the shadows are missing as well as the bottom and top part of the polygon). [cid:E6905B6F-F5CA-447D-A42D-BA1604AC7F5A@mobile.usilu.net] Now my question is: is there already something that makes those polygons or does anyone have any hint on how to make the top part with woden? Thannks in advance. Cheers, Nicolas

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running out of memory while processing a 220MB csv file with NeoCSVReader - tips?
by Paul DeBruicker Nov. 16, 2014

Nov. 16, 2014

Hi - I'm processing a 9 GBs of CSV files (the biggest file is 220MB or so). I'm not sure if its because of the size of the files or the code I've written to keep track of the domain objects I'm interested in, but I'm getting out of memory errors & crashes in Pharo 3 on Mac with the latest VM. I haven't checked other vms. I'm going to profile my own code and attempt to split the files manually for now to see what else it could be. Right now I'm doing something similar to |file reader| file:= '/path/to/file/myfile.csv' asFileReference readStream. reader: NeoCSVReader on: file reader recordClass: MyClass; skipHeader; addField: #myField:; .... reader do:[:eachRecord | self seeIfRecordIsInterestingAndIfSoKeepIt: eachRecord]. file close. Is there a facility in NeoCSVReader to read a file in batches (e.g. 1000 lines at a time) or an easy way to do that ? Thanks Paul

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