July 2017 - Pharo-users - lists.pharo.org

[Pharo News] Free Ephemeric Cloud for Association Members
by Marcus Denker July 19, 2017

July 19, 2017

Free Ephemeric Cloud for Association Members http://pharo.org/news/FreeEphemeric online: now.

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could not find module vm-display-X11
by Hilaire July 19, 2017

July 19, 2017

Hi, On Ubuntu 16.04 (Ubuntu MAte), I ahve the following error with DR. Geo (release based on Pharo3). Of course the needed 32bits libs are installed. Could it be the new graphic back end of Ubuntu? hilaire@PCHome:~/DrGeo.app$ ./DrGeo.sh could not find module vm-display-X11 Abandon (core dumped) Hilaire

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get output of a forked process on windows
by Christophe Demarey July 19, 2017

July 19, 2017

Hi, I would like to evaluate a Smalltalk expression in a forked process (i.e. something like OSProcess thisOSProcess waitForCommandOutput: 'pharo Pharo.image eval "SystemVersion current dottedMajorMinor"'). It is doable on linux/mac with OSProcess but not on Windows. Is there another way to do that on Windows? I would prefer to avoid to write to a file. Thanks, Christophe

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Need help for SmartTest/CORA
by Benoit Verhaeghe July 19, 2017

July 19, 2017

Hi everyone, I'm working on SmartTest/CORA. It's a plugin that help us with test. It shows us only the test we should run to well tests ours applications. And it will run automatically the tests (or not if you disable this option). It will be great if you can help me by installing it. You only have to execute this command : Metacello new githubUser: 'badetitou' project: 'TestsUsageAnalyser-CORAExtends' commitish: 'master' path: '.' ; baseline: 'TestsUsageAnalyserCORAExtends' ; load . You can also use the plugin with jenkins. Everything are explained here : http://badetitou.github.io/research/smalltalk/2017/07/05/CORA/ Tell me if you are in trouble during the installation Thanks for your help Benoit

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bitAnd: Documentation
by Koos Brandt July 18, 2017

July 18, 2017

Hi I am new to this environment I am on Pharo 6.0 - 64 Mac OSX version, Downloaded over the weekend. Just did some learning and found that the description for bitAnd: is probably wrong. It reads exactly the same as bitOr: here are some tests as performed in the workspace Also included bitXor: for the fun of it bitAnd: arg Primitive. Answer an Integer whose bits are the logical OR of the receiver's bits and those of the argument, arg. Numbers are interpreted as having 2's-complement representation. Essential. See Object documentation whatIsAPrimitive. <primitive: 14> self >= 0 ifTrue: [^ arg bitAnd: self]. ^ (self bitInvert bitOr: arg bitInvert) bitInvert. 0 bitAnd: 0 -> 0 1 bitAnd: 0 -> 0 2 bitAnd: 0 -> 0 3 bitAnd: 0 -> 0 0 bitAnd: 1 -> 0 1 bitAnd: 1 -> 1 2 bitAnd: 1 -> 0 3 bitAnd: 1 -> 1 bitOr: arg Primitive. Answer an Integer whose bits are the logical OR of the receiver's bits and those of the argument, arg. Numbers are interpreted as having 2's-complement representation. Essential. See Object documentation whatIsAPrimitive. <primitive: 15> self >= 0 ifTrue: [^ arg bitOr: self]. ^ arg < 0 ifTrue: [(self bitInvert bitAnd: arg bitInvert) bitInvert] ifFalse: [(self bitInvert bitClear: arg) bitInvert] 0 bitOr: 0 -> 0 1 bitOr: 0 -> 1 2 bitOr: 0 -> 2 3 bitOr: 0 -> 3 0 bitOr: 1 -> 1 1 bitOr: 1 -> 1 2 bitOr: 1 -> 3 3 bitOr: 1 -> 3 bitXor: arg Primitive. Answer an Integer whose bits are the logical XOR of the receiver's bits and those of the argument, arg. Numbers are interpreted as having 2's-complement representation. Essential. See Object documentation whatIsAPrimitive. <primitive: 16> self >= 0 ifTrue: [^ arg bitXor: self]. ^ arg < 0 ifTrue: [self bitInvert bitXor: arg bitInvert] ifFalse: [(self bitInvert bitXor: arg) bitInvert]. 0 bitXor: 0 -> 0 1 bitXor: 0 -> 1 2 bitXor: 0 -> 2 3 bitXor: 0 -> 3 0 bitXor: 1 -> 1 1 bitXor: 1 -> 0 2 bitXor: 1 -> 3 3 bitXor: 1 -> 2 Picked it up when I was trying to explain the simplicity of the even method on smallInteger. Methods work just fine, but the description is wrong regards Koos brandt

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Mysterious problem in loading Pharo
by PBKResearch July 18, 2017

July 18, 2017

Hello I have a problem in loading Pharo images which, until yesterday, loaded without difficulty. All the images showing the problem are Pharo 6 with the Cog VM; older images do not seem to be affected. The first sign of a problem is that, as soon as I start the image, the debug console appears, with several repeats of the message: LoadLibrary(FT2Plugin.dll) (998: Invalid access to memory location.) The other strange thing is that the appearance of some opened windows has changed. Most obviously, the three icons at the top left (close, minimise, expand) are very close together. Also, I think the print size has got a bit smaller, though this is not obvious. I have recently reinstalled some components of Pharo and Moose, trying to solve my problems with PunQLite, so I wondered if I had fouled something up. To check, I made a completely new install of Pharo 6 (#60508) from the Pharo download page in a separate folder. When I start the image, both the strange things above are present, plus a debug window with the message; 'FT2 Error: Freetype2 primitive failed'. So it looks as though something has happened to my system which means that any Pharo 6 image will show these oddities. The images I have tried seem able to run some of my functions correctly, so it's all to do with appearance. I am running on Windows 10 with all recent updates. There was a major update of Windows late yesterday, so it may be that the problems appeared then. Does anyone have any suggestions? Many thanks Peter Kenny

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[Ann] Keccak hashing algorithm
by Santiago Bragagnolo July 18, 2017

July 18, 2017

Hi there! I am just releasing the first version of the Keccak-256 hashing algorithm. https://en.wikipedia.org/wiki/SHA-3 You can find it at: https://github.com/sbragagnolo/Keccak This version is based on a javascript implementation: https://github.com/emn178/js-sha3 This implementation supports as message: bytearray and ascii and utf-8 strings. Soon i will be adding support to the rest of the Keccak family of hashing functions, since the implementations is quite configurable, is just need to add some constructors with specific configurations and tests for this other cases of usage. Here a onliner for building an image with the version v0.1: wget -O- https://raw.githubusercontent.com/sbragagnolo/Keccak/v0.1/build.sh | bash Hope you find it useful :) Santiago

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Encoding and conversion problem
by Cyril Ferlicot July 18, 2017

July 18, 2017

Hi, I did a refactoring in Moose in order to use the encoding detector that Sven did some weeks ago while reading a file. With the latest stable version of ZincHTTPComponent, I can get the encoding like this: fileReference binaryReadStreamDo: [ :in | (ZnCharacterEncoder detectEncoding: in upToEnd) ] Since we need to read the files a lot, I save the identifier of the encoder using the #identifier method. Then when I read I just want to get the TextConverter corresponding to the encoder in order to read the stream. The problem is that in the case of a file encoded in ISO-8859-1, my instance of ZnSimplifiedByteEncoder return 'iso88591' as identifier and Latin1TextConverter does not have this encoding name in its possibilities. Only 'iso-8859-1'. Should we add 'iso88591' to the Latin1TextConverter? If yes, could we backport this to Pharo 6 please? -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

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[OFFTOPIC] Update: Debris Publishing / Quuve Research & Portfolio Management Platform
by Mariano Martinez Peck July 18, 2017

July 18, 2017

Hi all, A while back our team presented Quuve [1], a customizable investment management ecosystem for professional investors. We also discussed the technologies employed to build it [2] (it is developed on Pharo and deployed on GemStone). We are reaching out again because we recently revamped our website [3] and created a number of promotional videos that demonstrate Quuve's power [4]. We would appreciate your help in marketing our wares! Quuve is the world's first fully integrated and customizable research and portfolio management platform. The system offers powerful features never before seen by the investment community and it empowers users to tailor tools in ways that accommodate their idiosyncratic investment style. In the coming years, customization, data-inheritance, shared databases, machine-learning, and robo-trading will become standard among investors of all sizes, and we expect Quuve will blaze the trail. If you have any questions about Quuve please let us know. [1] http://pharo.org/success/Quuve [2] http://forum.world.st/Fwd-Debris-Quuve-Technologies-used-td4819786.html [3] http://www.debrispublishing.com/ [4] https://www.youtube.com/watch?list=PLfTMPTPc22sGNrm2rXt8 kD-9iFTgqbAUG&v=zdm4CVse2Hc Thanks, -- Mariano http://marianopeck.wordpress.com

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Little challenge: Best way to read stream and count line returns
by Cyril Ferlicot July 18, 2017

July 18, 2017

Hello everyone, I often needs to read some streams these days and to get some infos related to the lines returns for example. Because of the CRLF it is a little complicated sometimes. I have an example of code here: | lfShouldBeCounted char count remaining | lfShouldBeCounted := false. remaining := 0. count := 0. stream position: startPos. [ stream position = endPos ] whileFalse: [ "13 is a CR, 10 a LF" (char := stream next asInteger) = 13 ifTrue: [ count := count + 1. remaining := 0. lfShouldBeCounted := false ] ifFalse: [ char = 10 ifTrue: [ lfShouldBeCounted ifTrue: [ count := count + 1. remaining := 0 ] ifFalse: [ lfShouldBeCounted := true ] ] ifFalse: [ remaining := remaining + 1 ] ] ] With this example I know how many lines where passed between the startPos and the endPos in a stream. I also know how many char there is between the last line return and the endPos. I wanted to know if you had a better way to do that? The way need to be as performant than this snippet. I know some people here can produce a snippet more readable and easier to maintain :) -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

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