November 2017 - Pharo-users

Re: [Pharo-users] Removing instance variables doesn't recompile the methods
by abdelghani ALIDRA Nov. 27, 2017

Nov. 27, 2017

Hi Ben, I will try to see. I dont have my PC right now Abdelghani -------------------------------------------- En date deÂ : Lun 27.11.17, Ben Coman <btc(a)openinworld.com> a Ã©critÂ : Objet: Re: [Pharo-users] Removing instance variables doesn't recompile the methods Ã: "abdelghani ALIDRA" <alidrandco(a)yahoo.fr>, "Any question about pharo is welcome" <pharo-users(a)lists.pharo.org> Date: Lundi 27 novembre 2017, 6h03 Thanks for reporting Abdelghani.Now it would be doubly useful if you could isolate which build introduced the problem.PharoLauncher can be used to help bisect working/non-working images. cheers -ben On 27 November 2017 at 04:08, abdelghani ALIDRA via Pharo-users <pharo-users(a)lists.pharo.org> wrote: ---------- Forwarded message ---------- From:Â abdelghani ALIDRA <alidrandco(a)yahoo.fr> To:Â "pharo-users(a)lists.pharo.org" <pharo-users(a)lists.pharo.org> Cc:Â Bcc:Â Date:Â Sun, 26 Nov 2017 20:08:29 +0000 (UTC) Subject:Â Removing instance variables doesn't recompile the methods Hi, In a fresh pharo 6 image, I add a class with an instance variable x and implement accessors. Then I write a test method for the accessors of x MyClassTest>>testReadWriteX Â Â Â self assert (MyClass new x: 0) x equals: 0 I run the test and obviously it is green BUT I remove the instance variable x. Obviously, the accessors are broken and the test should be red when I execute it again but it is not!!! I can even change the class again (to recompile it I thought) or even load the code in a new image and the tests are still green. I can also invoque the broken methods in a playground or in an inspector : MyClass new x: 0; increment; x then printIt. and astonishingly 1 is printed. The only way to detect the error is to recompile the method but this does not happen (maybe it should) when instance variables are modified or removed in the class (even when you use the refactoring tool!) I think this is annoying because one can no more really trust his tests. Cheers Abdelghani

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Re: [Pharo-users] Removing instance variables doesn't recompile the methods
by Ben Coman Nov. 27, 2017

Nov. 27, 2017

Thanks for reporting Abdelghani. Now it would be doubly useful if you could isolate which build introduced the problem. PharoLauncher can be used to help bisect working/non-working images. cheers -ben On 27 November 2017 at 04:08, abdelghani ALIDRA via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > > > ---------- Forwarded message ---------- > From: abdelghani ALIDRA <alidrandco(a)yahoo.fr> > To: "pharo-users(a)lists.pharo.org" <pharo-users(a)lists.pharo.org> > Cc: > Bcc: > Date: Sun, 26 Nov 2017 20:08:29 +0000 (UTC) > Subject: Removing instance variables doesn't recompile the methods > > Hi, > > In a fresh pharo 6 image, I add a class with an instance variable x and > implement accessors. > Then I write a test method for the accessors of x > MyClassTest>>testReadWriteX > self assert (MyClass new x: 0) x equals: 0 > > I run the test and obviously it is green > > BUT > > I remove the instance variable x. Obviously, the accessors are broken and > the test should be red when I execute it again but it is not!!! > > I can even change the class again (to recompile it I thought) or even load > the code in a new image and the tests are still green. > I can also invoque the broken methods in a playground or in an inspector : > MyClass new x: 0; increment; x then printIt. and astonishingly 1 is printed. > The only way to detect the error is to recompile the method but this does > not happen (maybe it should) when instance variables are modified or > removed in the class (even when you use the refactoring tool!) > > I think this is annoying because one can no more really trust his tests. > > Cheers > Abdelghani > > > >

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Re: [Pharo-users] How to write a little REPL
by phil＠highoctane.be Nov. 27, 2017

Nov. 27, 2017

NeoConsole could be an option. https://github.com/svenvc/pharo-server-tools/blob/master/README.md Phil On Nov 27, 2017 03:56, "Holger Freyther" <holger(a)freyther.de> wrote: > On 27. Nov 2017, at 05:38, Stephane Ducasse <stepharo.self(a)gmail.com> wrote: > > Hi Hey! > I'm working on a mini scheme implementation and I would like to add a REPL and > I wonder how I can super easily get a read line. The easiest might just be to use "rlwrap your-interpreter"? But I think you want to allow multi-line input. So either link libreadline (GPL) or libedit? holger

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Re: [Pharo-users] Removing instance variables doesn't recompile the methods
by Stephane Ducasse Nov. 26, 2017

Nov. 26, 2017

Hi abdel I created a class with x and two accessors and I created the same test than you. They were green. Then I removed the instance variable x and I run the tests and they were greeeeeeeeennnnnnnnnnn (agrhhhhhhhh) I checked the accessors and the methods where showing that the instance variable is missing. So to me this is indeed a bug. I have no idea why the test should run. Stef On Sun, Nov 26, 2017 at 9:08 PM, abdelghani ALIDRA via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > ---------- Forwarded message ---------- > From: abdelghani ALIDRA <alidrandco(a)yahoo.fr> > To: "pharo-users(a)lists.pharo.org" <pharo-users(a)lists.pharo.org> > Cc: > Bcc: > Date: Sun, 26 Nov 2017 20:08:29 +0000 (UTC) > Subject: Removing instance variables doesn't recompile the methods > > Hi, > > In a fresh pharo 6 image, I add a class with an instance variable x and implement accessors. > Then I write a test method for the accessors of x > MyClassTest>>testReadWriteX > self assert (MyClass new x: 0) x equals: 0 > > I run the test and obviously it is green > > BUT > > I remove the instance variable x. Obviously, the accessors are broken and the test should be red when I execute it again but it is not!!! > > I can even change the class again (to recompile it I thought) or even load the code in a new image and the tests are still green. > I can also invoque the broken methods in a playground or in an inspector : MyClass new x: 0; increment; x then printIt. and astonishingly 1 is printed. > The only way to detect the error is to recompile the method but this does not happen (maybe it should) when instance variables are modified or removed in the class (even when you use the refactoring tool!) > > I think this is annoying because one can no more really trust his tests. > > Cheers > Abdelghani > > >

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Removing instance variables doesn't recompile the methods
by abdelghani ALIDRA Nov. 26, 2017

Nov. 26, 2017

Hi, In a fresh pharo 6 image, I add a class with an instance variable x and implement accessors. Then I write a test method for the accessors of x MyClassTest>>testReadWriteX Â Â Â self assert (MyClass new x: 0) x equals: 0 I run the test and obviously it is green BUT I remove the instance variable x. Obviously, the accessors are broken and the test should be red when I execute it again but it is not!!! I can even change the class again (to recompile it I thought) or even load the code in a new image and the tests are still green. I can also invoque the broken methods in a playground or in an inspector : MyClass new x: 0; increment; x then printIt. and astonishingly 1 is printed. The only way to detect the error is to recompile the method but this does not happen (maybe it should) when instance variables are modified or removed in the class (even when you use the refactoring tool!) I think this is annoying because one can no more really trust his tests. Cheers Abdelghani

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Re: [Pharo-users] Pharo-users Digest, Vol 55, Issue 206
by ÐÐ¸ÐºÐµÐ½ÑÐ¸Ð¹ ÐÐ¾ÑÐ°Ð¿Ð¾Ð² Nov. 26, 2017

Nov. 26, 2017

I downloaded the latest PharoLauncher image, use VM for Pharo 6.1. 1) On load i got an error with UTF8 encoding. 2) Every time i tried to create image (for example, Pharo 7 image) i get an error "Can't find the requested origin". Reported. Best regards, Vikenti Potapov

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Re: [Pharo-users] Pharo-users Digest, Vol 55, Issue 207
by ÐÐ¸ÐºÐµÐ½ÑÐ¸Ð¹ ÐÐ¾ÑÐ°Ð¿Ð¾Ð² Nov. 26, 2017

Nov. 26, 2017

I will be glad to help to find solution with this problem that started with later versions of Pharo 6. While Pharo has such problems - it is not production-ready. Just point me from where to start my investigation of code. --- The full stack --- WindowsResolver(PlatformResolver)>>cantFindOriginError [ self cantFindOriginError ] in WindowsResolver(PlatformResolver)>>directoryFromEnvVariableNamed: [ ^ arg2 value ] in WindowsResolver(PlatformResolver)>>directoryFromEnvVariableNamed:or: BlockClosure>>cull: Context>>evaluateSignal: Context>>handleSignal: PrimitiveFailed(Exception)>>signal PrimitiveFailed class(SelectorException class)>>signalFor: Win32Environment(Object)>>primitiveFailed: Win32Environment(Object)>>primitiveFailed Win32Environment(Object)>>primitiveFail Win32Environment(OSEnvironment)>>getEnv: Win32Environment>>getEnv: Win32Environment(OSEnvironment)>>at:ifAbsent: [ Smalltalk os environment at: arg1 ifAbsent: [ ] ] in WindowsResolver(PlatformResolver)>>directoryFromEnvVariableNamed:or: BlockClosure>>on:do: WindowsResolver(PlatformResolver)>>directoryFromEnvVariableNamed:or: WindowsResolver(PlatformResolver)>>directoryFromEnvVariableNamed: WindowsResolver>>home WindowsResolver>>documents The overall difficulty here in getting this addressed is difficulty in > reproducing your environment. > For example, I think it would be awkward for me to operate with OS locale > set to Russian. > You'll see little action on it until there is an Issue logged at > pharo.fogbugz.com with a simple set of steps to reproduced for standard > environments (i.e. using English locales) > > Reviewing your other posts, I'd suggest initially creating a script to wrap > Pharo startup that cleans all the environment variables to ascii > characters, temporarily creating required directories so at lest you can > get it started. Then extend that script to reintroduce the error, like a > single non-ascii character in a single environment variable that causes an > error. That extended part then provides a path for others to reproduce > your problem, which you would attach to the Issue. Then as you > investigate a solution yourself, ask questions about it on pharo-dev to > keep the Issue active and over time you'll likely get some action from > others on it. > > cheers -ben

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deselecting individual items with beMultiple
by Evan Donahue Nov. 25, 2017

Nov. 25, 2017

If I have a gl fast table with #beMultiple enabled, is there a way for me to select non-contiguous items? Eg - item 1 - item 2 - item 3 Using shift, I can highlight items 1&2 or 1-3, but not 1&3, excluding 2. Some listing interfaces in non-pharo applications allow control clicking to deselect individual items from the middle of a selection. Is there something like that in Pharo glm presentations? Thanks

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Timespan translateToUTC problematic
by Trussardi Dario Romano Nov. 25, 2017

Nov. 25, 2017

Ciao, i have a Pharo 4.0 image run on macbook with time zone is set to Rome +1 UTC . When i send the translateToUTC to Date instance it is ok: Date today > 2017-11-16T00:00:00+01:00 Date today translateToUTC > 2017-11-16T00:00:00+00:00 But for Month instance : Month month: 6 year: 2015 > 2015-06-01T00:00:00+01:00 ( Month month: 6 year: 2015 ) translateToUTC > 2015-06-01T00:00:00+01:00 The same problematic is for Year instance. Considerations ? Thanks, Dario

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Nov. 25, 2017

Hi again, this is my last question and the more general one of the day :-) Iâm looking for way of representing and executing simple "business processes" in Pharo and a way of declaring domain ontologies/taxonomies. I didnât find any lib around this subjects except some projects in other smalltalk dialects. I just wander if somebody has done some work in these field. Iâm also interested in (KISS) design discussions around these topics, hence this email. I donât want to do a full fledged business process middleware. I would need : - a way to represent simple business processes (succession of activities with logic gates (and/or/xor) => I might be able to do that by myself). - a way to execute these processes (routines) in a semi-aotumatic manner => This looks more difficult to do to me. => my aim is to execute recurrent routines (my routines) with the help of a Pharo application For such a system, I also need a way to categorize information context. Again, I donât think I need a full fledged ontology implementation like Description Logic (or whatever). I think Iâll be happy with information tagging according to a predefined taxonomy. Instead of flat tags, Iâd like them to implement some sort of multiple inheritance. For instance, I may need a tag #soccer that "inherit" #sport. Any information regarding taxonomy tagging in Pharo ? (Or eventually ontology?). TIA, CÃ©drick

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