Beginners June 2010

beginners@lists.squeakfoundation.org

17 participants
15 discussions

Re: Beginners Digest, Vol 50, Issue 5
by Andy Burnett 09 Jun '10

09 Jun '10

Hernán wrote <<< Hi Andy, You may try http://www.squeaksource.com/SimpleTextParser.html which is a fork of the Avi's CSV parser I did to support additional protocol. If you like fix or include some features, I can add you as project developer. You may specify what's your particular case/issue with the parser so other people can help you. >>> Thanks Hernán That's great. I will switch over to using your package immediately. However, I am still not clear how one submits bug fixes and enhancements to Squeak packages. One of the questions that Randal asks on his FLOSS show is "how can people contribute to the projects", and usually there is some sort of process. At a very simple level, I would like to understand the mechanics of how I can help to improve packages. Now, it might be as simple as emailing the package owner and saying "hey, I found a bug, and this is how I fixed it" and leaving it at that, but there may be a more sophisticated way of doing it via monticello etc. Ideally, I would like to avoid creating forks, because - on my experience - it makes it harder for people to find things. For example, I searched for CSV, but didn't find your package. I wonder if it would be possible to create a 'star' rating system, a bit like the reviews on Amazon, to help people find the packages that are highly regarded? Cheers Andy

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What is the protocol for updating someone else's code?
by Andy Burnett 09 Jun '10

09 Jun '10

I downloaded Avi Bryant's CSV Parser and found that it didn't work properly with Pharo. After a bit of digging around I managed to fix it. Now I am a bit stuck. I would like to submit it back to Squeaksource, but I don't really know what the protocol is. Should I: 1. Put it back in the same monticello repository - would I have write access by default? - as an update 2. Do I create my own repo, in which case how do I tell other people where to find it - I really want to avoid creating yet more packages for people to search through. 3. Do I email Avi and give him the update 4. Some other option I think the problem is slightly more complicated because I am using Pharo 1.1. I don't know whether my fixes are necessary for Squeak, or Pharo 1.0. What is the recommended approach? Cheers Andy

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How can I prevent a new Morph from being stepped?
by Sean P. DeNigris 04 Jun '10

04 Jun '10

My TextMorph subclass's>>step seems to be getting called before the object is ready - or at least that's what I pieced together from stepping through the debugger. I tried adding the following to initialize : self stop. self stopStepping. But step is still called. Can I prevent the object from being stepped out of the gate, until I turn stepping on later? Here is the code: http://forum.world.st/file/n2242459/MorphicSPD-spd.1.mcz MorphicSPD-spd.1.mcz To cause the error, Doit: GrowableTextMorph new openInWorld. The specific error is: 'UndefinedObject(Object)>>doesNotUnderstand: #withIndexDo:' Thanks. Sean -- View this message in context: http://forum.world.st/How-can-I-prevent-a-new-Morph-from-being-stepped-tp22… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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How do I diff two images?
by Clinton Blackmore 02 Jun '10

02 Jun '10

Greetings. While I've programmed for some time, I am new to Squeak. I was wondering how I diff or compare two images that are largely similar (such as, say, Scratch vs Scratch For Second Life). In other environments, I'd run the source trees for each project/variation through a recursive diff tool -- Beyond Compare, Changes.app, Kompare, or even `diff` from the command line. How do I do something similar in Squeak? Cheers, Clinton Blackmore

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Using Futures in a thread other than the Morphic Thread
by Jeff Gonis 02 Jun '10

02 Jun '10

Hi everyone, I am currently experimenting with using futures in squeak as a very convenient method for creating processes to do background work in, but a problem I am running into is that they run in the Morphic thread it appears. This means that if I have a particularly long lived chunk of work I can end up blocking the UI thread and having an unresponsive GUI. Ideally what I would like to do is create a future, dispatch it onto a process running at userBackgroundPriority, and then block the UI only when I try to get the value from the Promise that is returned. I know that I can use a block closure and the forkAt: method to get a process running at the userBackgroundPriority, but this doesn't give me the nice behaviour of a Promise where I can block until completion when I actually need the value my process will generate. So my question is, am I missing something obvious here, or is dispatching futures to a different thread something that is being worked on for a "future" squeak release? Thanks for your help, Jeff G

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Beginners June 2010