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

stdout on windows
by Tudor Girba March 10, 2015

March 10, 2015

Hi, Can anyone point me to how to write something to standard out when executing Pharo from the Windows command line? Cheers, Doru -- www.tudorgirba.com "Every thing has its own flow"

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Dealing with multiple cases of a string while keeping code short and OOP friendly
by kilon alios March 10, 2015

March 10, 2015

So I am parsing strings that represent python types and other custom objects. An example would be '<Vector (1.0 , 0.2 , 0.8) >' or '<Color (0.3 , 0.9 , 0.4 )>' etc But I dont want to use too many ifTrue , ifFalse and end up with a long method. So I was thinking creating a OrderedCollection that would be 2D , first dimension is the regex that fits the type the second is the pharo object that corresponds to this type . Then I will have a common method for each of those pharo object to deal with the parsing. But I was wondering how to use a class that I dont know its name until runtime. For example lets say i get a string aPythonString := '< Bone [ "side bone" , IK = True , ( 1.0 , 0.1 , 0.2) ]>' I would want in this case to send the message the EphBoneType parse : aPythonString. The problem is that I dont know the contents of the string until I receive it. So I want the name of the class to be composed according the string received . Is this possible ? Is this a smart way ? How would you do it ?

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smaller configurations vs groups [was Re: Pillar and GT tools in Pharo4]
by Tudor Girba March 10, 2015

March 10, 2015

Hi, I summarize below why I think fine grained configurations should be preferred to groups. The group is not a first class configuration, although it can be depended on. If you depend on a group of a configuration, it's harder to understand the consequences and it's harder to build tools for it. Consider the graph below representing the dependencies starting from ConfigurationOfMoose #development: [image: Inline image 2] It's a simple representation of dependencies, and it makes the maze of configurations easier to grasp. The interesting thing about it is that by showing a configuration node only once, you can see how multiple other projects depend on it. For example, HashTable is being depended on by two distinct configurations. You can also see that Magritte depends on Grease, but you do not see that it only depends on the Core group. To do that, you have to look at the details of the edge. We used to have groups in GT, however, after a while we moved to more fine grained configurations. As a consequence, you can see that GlamourCore (which used to be a group in Glamour) is being depended on by three different configurations. Using first class configurations makes tool building (like representation, navigation or release) easier. You could argue that we could represent a Group as node, however, even then you would not be able to see dependencies between groups that reside within the same configuration because groups are not first class configurations that can explicitly define dependencies, they are just groups. Groups might provide an apparent ease of use for quick things, but I strongly believe that they are an unessential construct and that if we would not use them, tools would become cheaper and more effective. Cheers, Doru On Sun, Mar 8, 2015 at 1:14 AM, Damien Cassou <damien.cassou(a)gmail.com> wrote: > > On Mar 7, 2015 4:42 AM, "Tudor Girba" <tudor(a)tudorgirba.com> wrote: > > > > Actually, I would rather prefer to create a separate > ConfigurationOfPillarTools that adds the Pillar-Pharo-Tools and the > PetitParser dependency. What that be Ok? > > Ok for me, do as you prefer. What is your rationale? > -- www.tudorgirba.com "Every thing has its own flow"

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GSoC mentor assistance for FOSSASIA smalltalk projects please
by Martin BÃ¤hr March 10, 2015

March 10, 2015

hi, FOSSASIA has been accepted for Google Summer of Code, and i have a few smalltalk related projects in there, see http://labs.fossasia.org/ideas.html i'd like to ask if anyone is willing to help me mentor those projects. since i am new to smalltalk myself it would be good to have some backup by someone more experienced. mentoring a student as a team i am sure is a lot more fun, and should make it easier to get the student motivated to join the pharo community and contribute to pharo. greetings, martin. -- eKita - the online platform for your entire academic life -- chief engineer eKita.co pike programmer pike.lysator.liu.se caudium.net societyserver.org secretary beijinglug.org mentor fossasia.org foresight developer foresightlinux.org realss.com unix sysadmin Martin BÃ¤hr working in china http://societyserver.org/mbaehr/

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Fixed tool bar in pharo, similar to the one in Squeak
by Offray Vladimir Luna CÃ¡rdenas March 9, 2015

March 9, 2015

Hi, I would like to add a fixed tool bar in the upper side of the word in Pharo, similar to the one that is in Squeak. I think that having this kind of fixed places with tools help newbies to find help and launch stuff. There is any place where I can install or look for a functionality like this one? Thanks, Offray

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Pillar and GT tools in Pharo4
by Torsten Bergmann March 9, 2015

March 9, 2015

Pillar config is updated and now available in config browser in Pharo 4: - more classes are commented - new baseline 0.20-baseline with version 0.20 for Pharo 4.0 - includes Pillar-Pharo-Tools package instead of (deprecated) Pillar-PharoInspector as EyeInspector is a thing of the past to now support GTInspector and GTSpotter with icons in Pharo 4 - additionally I wanted to update to STON 0.10 but had to step back to 0.9 of STON until Sven makes the config available in SS3 and STHub So if you are on Pharo 4 you can: 1. Load "Pillar" from Config browser 2. Parse and inspect pillar document like this (PRDocumentParser parse: '%This is a commented line |C1|C2 |C3|C4 Some text # list item 1 # list item 2 ') inspect The GT inspector allows you to browse the different formats like Pillar, HTML, Markdown, Text and LaTeX. If you click on the lightbulb Spotter at the top right of the GT inspector a new spotter will open allow you to search in the current document item. You can use spotter to dive into the document structure. Attached is a screenshot. Bye T.

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Pillar multiline comment
by Peter UhnÃ¡k March 9, 2015

March 9, 2015

Is it possible to create multiline comments in Pillar? For example I want to add code that I used to create a visualization, but I want to show the user only the image (but want to keep the code so I can regenerate if needed). Thanks, Peter

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Re: [Pharo-users] Pharo / J - Integration
by Martin Saurer March 9, 2015

March 9, 2015

Hi Torsten To re-implement APL or J capabilities in pure smalltalk is an interesting approach. The problem I see currently is the performance when handling large arrays with thousands or millions of rows and/or columns. During some performance tests I saw that for arrays with a few hundred rows/cols, the calculation speed of Pharo and J is nearly the same. When handling arrays with thousands or a few millions of rows/cols, J is 7-10 times faster than Pharo. During the last decades, J has been optimized explicitly to handle (very) large arrays. In my opinion, it would be difficult to get the same processing speed in pure smalltalk. That's not a disadvantage of smalltalk, it's simply the nature of different languages. Martin > Stef wrote: >> Hi Martin >> >> I imagine that you know the OOPAL paper showing APL + Objects because it >> would be cool to have it for Pharo :). > > Hi Stef, > > do you know: http://astares.blogspot.de/2014/10/apl-concepts-in-pharo.html > > Bye > T.

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I need to put smalltalkhub down (max 30m)
by Esteban Lorenzano March 9, 2015

March 9, 2015

Hi, I need to apply an updateâ¦ nothing that you will actually see, but is needed :) I will put it down at 13:30 UTC (14:30 here in continental Europe, 10:30 in Argentina and I donât know the rest of the worldâ¦ but a hint: is in 15min :P ) Esteban

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Re: [Pharo-users] Pharo /J - Integration
by Martin Saurer March 9, 2015

March 9, 2015

Hi Alexandre Please have look at the video description on youtube. There you will find all the download links as well as instructions (ReadMe.txt) on how to install the Pharo (.mcz) and the J (pre-configured J environment) part. The .mcz file contains all the examples from the video. See www.jsoftware.com for more information, and tons of examples and essays about the J programing language. If you prefer videos for an intro to the language search for playlist "j in 10 minutes" on youtube. >From within Pharo, NativeBoost is used to access the jinter.dll/dylib/so (depending on your platform). Jinter then access the underlying J interpreter. Don't hesitate to ask me, if you have further questions. Martin > Hi Martin! > > I did not know J at all. How can I try your code? > You are invoking functions using NativeBoost of the J library? > > Cheers, > Alexandre

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