Beginners June 2016

beginners@lists.squeakfoundation.org

9 participants
8 discussions

New Introductory Tutorial
by EuanM 26 Aug '16

26 Aug '16

I've created Yet Another Smalltalk First Steps tutorial. This is intended as one of a series. It is designed to be cross-platform across Squeak 5 Pharo 4 Seaside 3.1 Cuis Dolphin 6 If you have experience running any of these systems on Windows, Linux or MacOS, please check to see if I have the instructions correct for your chosen pairing of Smalltalk and OS platform. (As you'll see when you look, I do not have detailed instructions for aspects of MacOS). The document is at: http://smalltalkinsmallsteps.blogspot.co.uk/2015/11/get-smalltalk-up-and-ru… (It's intended to move to a different blog after this review process). I feel the need to do this as cross-Smalltalks tutorial because of findings and 4 charts I've placed at: http://smalltalkinsmallsteps.blogspot.co.uk/2015/11/mindshare-of-smalltalk-… Essentially, Smalltalk mindshare and use is incredibly tiny, compared to other languages in the same space. (We all know this, but seeing it represented graphically has a more visceral effect, IMO) Aggregating interest in all the Smalltalks still does not bring more than a tiny proportion of the interest in, and use of, Ruby. In turn, Ruby is (quite understandably) small in comparison to JavaScript. Comparing interest in any specific Smalltalk is, predictably, smaller than the aggregate interest in Smalltalk. Our community seems determined to split itself into smaller and smaller sub-communities. I think we do ourselves a disservice this way. My initial contribution will be to try to provide some explicitly pan-Smalltalk beginners' tutorials, like this one. Cheers, and happy Smalltalking, EuanM

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Interactive Fiction Framework in Smalltalk Released
by ericvm 21 Jun '16

21 Jun '16

Hello, Hopefully this is the right place to write. If not, please tell me which mailing list I should write to. I am working at an Interactive Fiction framework in Smalltalk and it is already in a very usable state and has a working Cloak of Darkness demo. I only tested it on Pharo but I suppose it would take minimum effort to port it to Squeak as well. The stable branch is on github (https://github.com/ericvm/smallworlds) and potentially unstable development branch is currently hosted at Smalltalkhub (http://smalltalkhub.com/#!/%7Eericvm/Smallworlds) It would be very nice if there were people interested in trying/testing and contribute to the project. I was hoping that since Squeak is more education focused than Pharo there might be more people interested in the project -- View this message in context: http://forum.world.st/Interactive-Fiction-Framework-in-Smalltalk-Released-t… Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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How does one create an array of points?
by Michael Rice 20 Jun '16

20 Jun '16

I've been trying to create an array of points (in Squeak 5) but am failing badly. See below: first part => what I get when I exec "print it" on the first part. Guidance please. #(1@1 2@2) => #(1 #@ 1 2 #@ 2) #((Point x: 1 y: 1) (Point x: 2 y: 2)) => #(#(#Point #x: 1 #y: 1) #(#Point #x: 2 #y: 2)) #(12 'b' $c) => #(12 'b' $c) #(12 'b' $c 1@1) => #(12 'b' $c 1 #@ 1) #(12 'b' $c (1@1)) => #(12 'b' $c #(1 #@ 1)) #(12 'b' $c (Point x: 1 y: 1)) => #(12 'b' $c #(#Point #x: 1 #y: 1)) Point x:1 y: 1 => 1@1 (Point x:1 y: 1) => 1@1 #((Point x: 1 y: 1)) => #(#(#Point #x: 1 #y: 1)) #(1@1) => #(1 #@ 1)

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CSV file help
by Joseph Alotta 18 Jun '16

18 Jun '16

Greetings, I am needing conceptual help with parsing these troublesome CSV files. I was breaking the lines using String >> findToken: but I found lines where extra deliminators were added. Notice the three following lines, the first and third line have extra commas from Oak Brook, IL and the second line does not have the comma. 02/04/2016 Thu,,"COSTCO WHSE #0388 000000000990388 - OAK BROOK, IL",,,,,37.00,,,,,,,, 02/05/2016 Fri,,"ELECTRONIC PAYMENT RECEIVED-THANK",,,,,-443.52,,,,,,,, 02/06/2016 Sat,,"COSTCO WHSE #1088 000000000991088 - BOLINGBROOK, IL",,,,,50.86,,,,,,,, I think I need to parse with the double quotes in mind, but I don’t know where to break it. Also, I was reading in the squeak pages that someone had already written code for this, but I couldn’t find anything. http://wiki.squeak.org/squeak/3260 has two methods, CSVSubstrings and SequenceableCollection-asCSVLine.st Does anyone know where these are now? Sincerely, Joe.

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Subclassing Dictionary Redux
by avalmez 14 Jun '16

14 Jun '16

Hello! Yep I'm having a problem similar to that previously posted about here but the circumstances aren't quite the same and the suggested solutions don't work anyway. The situation... I am subclassing Dictionary because i want to code to an "interface" rather than the Dictionary class as I want the flexibility of changing the parent class to some other collection if that seems appropriate. So, I did something like this: Dictionary subclass: #MySubclass... All other details of the subclass definition are left to "asis" in the subclass template. However, when is send Myclass>>at:put: the method fails with error message "only integers should be used as indices". The proposed solutions to other similar issues reported by others were: - overide MyClass class>>new as follows: ^super new initialize (actually, override the parent's new) - add <shape: #inherit> to the body of the class I tried the former expecting no change (why should it work?) and my expectation was realized. The latter doesn't specify where in the class body to add <shape: #inherit> but tried each of the following individually: - Revised: Dictionary subclass: #MySubclass shape: #inherit... - Added MySubclass>>shape ^#inherit -Added MySubclass class>>shape ^#inherit. Doubtless someone out there knows what I should have done, but what I did do failed in each case with the same error message. So, I'm stumped at this point. I know that adding "index: #object" to the subclass definition works in another implementation of Smalltalk, but Squeak doesn't seem to recognize index:. Still stumped. One last thing I found while hunting and pecking for a clue that I don't understand. Squeak documentation states that Dictionary is a subclass of Set, and in other implementations of ST that is indeed the case (I believe the ST standard specifies the same). However, the system browser shows that Dictionary is a subclass of HashedCollection...??? Enough verbiage. Any suggestions/fixes folks? All responses will be greatly appreciated. Andres -- View this message in context: http://forum.world.st/Subclassing-Dictionary-Redux-tp4900765.html Sent from the Squeak - Beginners mailing list archive at Nabble.com.

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set variables before initialize and write out files before exit
by Joseph Alotta 13 Jun '16

13 Jun '16

Greetings, My object needs to have some variables set before it can run the initialize method and also it needs to have run an exit method. f := FileParser new. f inPath: '/Users/jja/Desktop/accountingfiles/'. f readThis: 'rei mastercard.csv'. f process f outPath: '/Users/jja/Desktop/accountingfiles processed/'. f write. Is there a better way to do this? Sincerely, Joe.

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run to here
by Joseph Alotta 03 Jun '16

03 Jun '16

Greetings, I am using the debugger and wondering how to use the “run to here” function. I think you have to be in the top of a debugger pane to go down to the spot where the cursor is. But how does it work if you’re many layers into a program. I want to debug the message just before the one that bombs. Are there any usage tips? Sincerely, Joe.

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FileDirectory
by Joseph Alotta 01 Jun '16

01 Jun '16

Greetings, I am looking for some documentation or snippets of code for using the FileDirectory class. I want to check if a file exists before I try to read it. I also want to look at a list of files in the directory. I did search SBE and google but found nothing. Sincerely, Joe.

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Beginners June 2016