May 2015 - Pharo-users - lists.pharo.org

Reddit example
by recursive68＠gmail.com May 31, 2015

May 31, 2015

Hi, Yes, I've tried to follow the instructions on https://medium.com/concerning-pharo/reddit-st-in-10-cool-pharo-classes-1b53… If I run: Gofer it smalltalkhubUser: 'SvenVanCaekenberghe' project: 'Reddit'; configuration; loadStable. I get the following error: NameLookupFailure: cannot resolve 'http' and a dialog box saying either Retry or Give Up It's attempting to download files as follows: Loading all file names from http://http://mc.stfx.eu/Neo/ which appears to be the issue. Thanks

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Transfer image between OSes
by mtk May 31, 2015

May 31, 2015

Hi, I am just playing around with Pharo and now I wanted to take my Image (together with the .changes file) and transfer it from Windows to Linux. Under Linux I can start my .image and everything looks like on Win, but as soon as I go to the System->Settings Menu there is a error. I tried to look into the debugger and found out that a class (/WindowsStore(FileSystemStore)/) is calling '/ensureCreateDirectory: aPath/' where aPath points to the Path of my Windows System. Is this the intended behavior? What do I have to do if I want to transfer my images between OSes? Thanks and kind regards Marcus -- View this message in context: http://forum.world.st/Transfer-image-between-OSes-tp4829484.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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How to move data between Pharo versions
by PBKResearch May 30, 2015

May 30, 2015

Hello I have found a way round this problem, but it seems messy and uncomfortable, so I thought I should ask what is the right way to do it. I have just changed from using Moose 5.0 (Pharo 3.0, update: #30862) to Moose 5.1 (Pharo 4.0, update: #40613). I had a rather complex dictionary structure in a Playground in 5.0, which I wanted to reproduce exactly in the 5.1 image. Looking around, Fuel looked like the obvious tool to save and restore the structure. It saved OK in 5.0, but when I tried to re-materialize it in 5.1 I got an error message: 'FLBadVersion: Materialization error. Unexpected stream vers' (can't see the rest of the message). I could see from the debugger output that Fuel was looking for version 194 and seeing 193. Using a brute force approach, I hacked FLSerializer class >> currentVersion in the Moose 5.0 image to return 194 instead 193, then tried again, and of course everything worked OK. My question is what should I have done? How can I move data from one image to another of a later version? If Fuel has no backward compatibility, is there another tool I can use? Thanks for any advice Peter Kenny

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Pastell Collection?
by PBKResearch May 30, 2015

May 30, 2015

Hello In analysing XML documents produced by XMLHTMLParser, I sometimes find results presented as a PastellCollection. I have found this class in the System Browser, as a subclass of OrderedCollection, but there is no class comment. Reading the method code does not help me find out what it does. I have found no reference in Wikipedia, nor anything helpful in Google. I suppose if it follows the OrderedCollection protocols I can just treat it as a standard collection, but I am unhappy at working blind like this. Can anyone tell me what it is for, and whether I can safely treat it like any other collection? Many thanks Peter Kenny

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Slice for a non Pharo package ?
by Matthieu Lacaton May 30, 2015

May 30, 2015

Hello, I reported a bug on Athens here : https://pharo.fogbugz.com/f/cases/15640/ I also created a slice to solve it by following the Pharo fogbugz video tutorial. But then I realized that Athens is not present in Pharo/main so it would not make sense to commit the slice into the Pharo Inbox. What is the procedure to propose a Slice for a package outside Pharo/main ? Sorry if it's a dumb question :s Cheers, Matthieu

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Reddit example
by recursive68＠gmail.com May 30, 2015

May 30, 2015

Hi, I'm trying to load the Reddit example from SmalltalkHub (Monticello), it fails with: This package depends on the following classes: DescriptorSystem You must resolve these dependencies before you will be able to load these definitions: RedditSchema allTableNames classModelForRedditLink: constructAllClasses descriptorForRedditLink: tableForREDDIT_LINKS: and also tried loading mcz file directly that fails to. If I try to install using: MCHttpRepository location: 'http://smalltalkhub.com/mc/SvenVanCaekenberghe/Reddit/main' user: '' password: '' It fails with an incorrect url: http://http ... when attempting to pull some package. This is using Pharo 4. Thanks

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Playground inspector and the self variable
by Esteban A. Maringolo May 30, 2015

May 30, 2015

Is it okay that the Playground's inspector drills down on the self variable indefinitely? It is... #(1 2 3) "Do it and go" will result in an Array being inspected, if I click on "self" it will open a new inspector on the side on the same object, and this can as deep as you want. I would block that from happening, in the raw tab, the "self" variable shouldn't drill down, sometimes I just want to select it to run an expression where self refers to the inspected object. Does it make sense what I propose? Or is there any use case where drilling down recursively ad infinutum is useful? Regards! Esteban A. Maringolo

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Is it always needed to redefine #hash message when you redefine #= message?
by Julien Delplanque May 29, 2015

May 29, 2015

The subject of this mail is exactly my question. I came to this question by looking at Object>>#= message implementation. """ = anObject "Answer whether the receiver and the argument represent the same object. If = is redefined in any subclass, consider also redefining the message hash." ^self == anObject """ When do we need to redefine #hash message? Is it the right way to implement equality between two objects or is there another message that I should override? Regards, Julien

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Problem with debugging methods
by Juraj Kubelka May 29, 2015

May 29, 2015

Hi, regularly I cannot debug methods because nil does not understand #compilationContext in method RBMessageNode>>isInlined self methodNode compilationContext â¦ Do you face this problem? I have not found related bug on FogBugz. Thanks, Juraj Pharo4.0 (Moose image 5.1) Latest update: #40613

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[Pre-ANN][Job] We are looking for a "Engineer R&D"
by Marcus Denker May 29, 2015

May 29, 2015

Hi, We will put the official announce online later this weekâ¦ we are looking to fill a a âyoung engineer positionâ. This is for recent graduates who finished their degree 2013/2014/2015. The topic is to work for 2 years on improving âremoteâ debugging for cases like server deployment, typical cloud scenarios and when using embedded Pharo images (e.g. for robotics). If you are interested (or know someone who might), please contact me. (official announcement will be online later this week). Marcus

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