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

Slots
by Thomas Worthington May 19, 2014

May 19, 2014

I notice that "Slots" are slated for addition in Pharo 3.0. Is there anywhere I can see which model of "slots" is being suggested? I'm not sure that slots, in the sense of Javascript, are a good idea generally and, in the broader context, I'm very unhappy with the idea of messing with Smalltalk's generally clean syntax by adding new language features. Could the desired effects be achieved by subclassing Behavour or somesuch high-level approach? -- Thomas Worthington

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[ANN] JNIPort for Pharo 3.0 alpha
by Joachim Geidel April 27, 2014

April 27, 2014

Hi everybody, JNIPort for Pharo 3.0 alpha is now available at SmalltalkHub. JNIPort is a Smalltalk library which allows Java code to be invoked from Smalltalk. It acts as a bridge between the world of Smalltalk objects and a Java Virtual Machine (JVM) where Java code is executing. When I first ported JNIPort to Squeak and Pharo 1.x, I used Alien as the FFI library. As NativeBoost has superseded Alien, the interface to the Java Native Interface library had to be rewritten. There are still some undocumented and obscure parts in NativeBoost, so this has taken some time. If you want to try it, load it via the ConfigurationOfJNIPort. I hope this works. If it does not, load the packages individually in the order in which they appear in the ConfigurationOfJNIPort. http://www.smalltalkhub.com/#!/~JNIPort/JNIPort The next step is to read the documentation at http://jniport.wikispaces.com/ Otherwise, you won't know what to do next. ;-) Download the extra files from the download page at Wikispaces, you will need two jar files from there. Start a Java VM attached to Pharo by adapting and executing the following code snippet: ---- | jvmSettings | "You can set the path to the Java VM library by editing the path as needed." JNIPortJNIInterface libraryFile: '/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Libraries/libclient.dylib' . "JNIPortJNIInterface libraryFile: 'C:\Programme\Java\jre7\bin\client\jvm.dll' ." jvmSettings := JVMSettings new. jvmSettings usesGhosts: true. jvmSettings supportsCallbacks: true. jvmSettings jniPortSettings useJNIHelperLibrary: false. jvmSettings ghostClassSettings retainMethodSource: true. "On Mac OS X and Linux, class path entries are separated by colons." "On Windows, you have to use semicolons instead. Edit the following line as needed." jvmSettings runtimeSettings classpath: '.:/Users/myname/JNIPort.jar:/Users/myname/JNIPort-Tests.jar'. " jvmSettings runtimeSettings classpath: '.;.\JNIPort.jar;.\JNIPort-Tests.jar'." "Uncomment the following if you want the Java VM to emit verbose messages. How to access these messages depends on your platform. On Mac OS X, they are visible in the Console application." "jvmSettings runtimeSettings addOption: '-verbose:jni'; addOption: '-verbose:gc'; addOption: '-verbose:class'." Cursor execute showWhile: [JVM newWithSettings: jvmSettings]. ---- Then the fun starts: ---- | zfClass zipfile entries | zfClass := JVM current findClass: #'java.util.zip.ZipFile'. zipfile := zfClass new_String: 'JNIPort.jar'. zipfile size. "--> answers an Integer" entries := zipfile entries. entries asAnEnumeration do: [:each | Transcript cr; print: each]. ---- And now to the ugly little secret reason why I call it an alpha version: While everything seems to work, it is *much* slower than it used to be in Pharo 1.2 with Alien. And when I compare it with VisualWorks, I wonder if the Pharo version secretly does some additional work for SETI: - Starting the JVM: VisualWorks 0.7 seconds Pharo 7 to 8 seconds - A benchmark using some methods of java.io.BufferedReader and java.util.StringTokenizer: VisualWorks 114 milliseconds Pharo 12 to 13 seconds I have not yet found the reason. The TimeProfiler is not very helpful, as its 1 millisecond resolution is too coarse. It would be nice if it had microsecond resolution. From the TimeProfiler results, it seems that calling a JNI method with NativeBoost is extremely slow, but I don't trust those profiles too much. So, give it a try, and if you find something useful concerning the bad performance, please send me a message. Best regards, Joachim Geidel -- View this message in context: http://forum.world.st/ANN-JNIPort-for-Pharo-3-0-alpha-tp4750750.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[ANN] BabyMock 2
by Attila Magyar April 24, 2014

April 24, 2014

I'm pleased to announce the 2.0 version of BabyMock. BabyMock is a visual mock object library that supports test-driven development. This version has a new syntax which is incompatible with the old version. Therefore it has a new repository http://smalltalkhub.com/#!/~zeroflag/BabyMock2 (BabyMock 1 is still available at its old location, but in the future I'd to focus on the development of BabyMock2, so don't expect too many changes regarding the old version). Changes in 2.0 - A new, extensible DSL (no more should/can) - Improved error messages, history of messages, detailed information about argument mismatches - An improved, Spec based GUI - Clicking on a mock opens an inspector on the expectations - Clicking on a message opens an inspector on the message - Object methods can be mocked by defaults - Blocks can be executed after receiving a message by the mock. The block has access to the arguments of the incoming message. - Any argument matcher - Cleanups and simplifications in the code I hope you don't mind the changes regarding the syntax. Personally I think it has lot more pros than cons. More information http://smalltalkhub.com/#!/~zeroflag/BabyMock2 p.s. It needs Pharo3.0. Attila -- View this message in context: http://forum.world.st/ANN-BabyMock-2-tp4748530.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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image resize event
by Usman Bhatti April 11, 2014

April 11, 2014

Hello, I would like to resize all my windows opened inside my image when resizing the image window. Can anyone point me to the hook where I can plug my code for window resizing? For example, it would like to do onImageResize World fitAll. tx, usman

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64 bit version
by Roelof Wobben April 2, 2014

April 2, 2014

Hello, Is there a 64 bit version of Pharo. I use a 64 bit version without the 32 bit libraries so no multilib Roelof

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Tiny-social meeting in Buenos Aires
by Esteban Lorenzano April 1, 2014

April 1, 2014

Hi, As some of you know, Iâm on vacations in Buenos Aires. Last days I was talking with the other Esteban of this list and with Hernan about doing a Pharo meeting to talk about the upcoming Pharo3 and wellâ¦ to socialise a bit :) It cannot be a true sprint or formal event because my times are complicated (also Iâm on holidays!) but is good to meet anyway and exchange impressions and news. Anyway, it will be friday 18hs to 20:30hs, in this place: http://www.cervelar.com.ar (in the Belgrano location). If you are in Buenos Aires and want to come, please send a confirmation (we need to make a reservation). Cheers, Esteban

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Pharo 1
by Roelof Wobben April 1, 2014

April 1, 2014

Hello, Im busy with book 1 and I work with version 1 Now this morning I did some changes and save it under a name. But when I just start up Pharo I see the pharo1.img again without my changes. And I also do not see a menu where I can choose which image I want to use as version 2 of Pharo does. How can I proceed where I quit with the right image. Roelof

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challenges
by Roelof Wobben April 1, 2014

April 1, 2014

Hello, I almost get book 1 ready. Now I wonder if there are challenges so I can practise more in Smaltalk. I know I learn the best by doing things and not just read about it. I like the most if the challenges can start at simple and get more complex . As example what I mean is 99 prolog/python problems Roelof

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Loop problem on Dr Stef
by Roelof Wobben March 31, 2014

March 31, 2014

Hello, When I select this part: 1 to: 100 do: [:i | Transcript show: i asString; cr ]. And do print it. I only see 1 where I expected to see all the numbers from 1 till 100. What went wrong ? Roelof

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Re: [Pharo-users] Pharo 1
by Stephan Eggermont March 31, 2014

March 31, 2014

Two things come to mind: - method names start with lowercase CellsPerSide - did you make cellsPerSide into a separate method? Stephan

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