April 2017 - Pharo-users - lists.pharo.org

Re: [Pharo-users] [ANN] Prometheas : a Pharo wiki database

by Juraj Kubelka

Nice effort! The key has to be one word term? For example I would like to add !docadd Pharo Sprint âand the explanation of what it is and how someone can participate.â sure, I can add only !docadd Sprint. Thanks! Juraj > El 21-04-2017, a las 07:24, Dimitris Chloupis <kilon.alios(a)gmail.com> escribiÃ³: > > > Hey guys I need your help with building the database, I am sure many of you can share small definitions > > the syntax is quite simple > !docadd term "Term is a term and this is its content of definition .More info can be found at http://www.term.com <http://www.term.com/>" > > for example > > !docadd Nireas "Nireas is a customised blue theme that comes with a gui that allows to change most colors in the theme. More info can be found at https://github.com/kilon/Nireas <https://github.com/kilon/Nireas>" > > the case on the term does not matter all terms are converted to lower case for ease of use. > > The definition must not be longer than 5 lines. > > I plan also to add a section for script examples but I have not added that feature yet, so avoid using quotation marks , single or double inside your definition , only regular character and full stops and parentheses. > > So if you feel like helping, it easy, fast and it will benefit beginners because I plan to add this database inside Pharo. My plan was to add it to playground but I decided to add it to GTSPotter which makes more sense. > > Thanks for any help on advance.

April 21, 2017

Re: [Pharo-users] [ANN] Prometheas : a Pharo wiki database

by Offray Vladimir Luna CÃ¡rdenas

Chat channels seem like good places to build that database. I find them distracting I try to be on them for short focused periods of time. But I'll try to remember to ask questions to the lighthouse bot and see if I can add new definitions. Cheers, Offray On 21/04/17 05:24, Dimitris Chloupis wrote: > > Hey guys I need your help with building the database, I am sure many > of you can share small definitions > > the syntax is quite simple > !docadd term "Term is a term and this is its content of definition > .More info can be found at http://www.term.com" > > for example > > !docadd Nireas "Nireas is a customised blue theme that comes with a > gui that allows to change most colors in the theme. More info can be > found at https://github.com/kilon/Nireas" > > the case on the term does not matter all terms are converted to lower > case for ease of use. > > The definition must not be longer than 5 lines. > > I plan also to add a section for script examples but I have not added > that feature yet, so avoid using quotation marks , single or double > inside your definition , only regular character and full stops and > parentheses. > > So if you feel like helping, it easy, fast and it will benefit > beginners because I plan to add this database inside Pharo. My plan > was to add it to playground but I decided to add it to GTSPotter which > makes more sense. > > Thanks for any help on advance.

April 21, 2017

Re: [Pharo-users] example in FFI manual not worked

by Yuriy Babah

Thank Ben. 2017-04-20 12:49 GMT+04:00 Ben Coman <btc(a)openinworld.com>: > Okay that helps a lot. You've done two things wrong. > > 1. You actually did.... > ExternalStructure subclass: #MyStructure > not > FFIExternalStructure subclass: #MyStructure > > This is what caused the error, since if you compare > the class-side methods (by clicking the <Class> button) > of ExternalStructure and FFIExternalStructure > you'll see only the latter has method #rebuildFieldAccessors. > > > 2. You didn't click the <Class> button before adding method #fieldsDesc. > This would trip you up after you fix the above. > "MyStructure rebuildFieldAccessors" would no longer produce an error > but *nothing* would happen when you evaluate it. > When you add #fieldsDesc to the class-side, switch back to the > instance-side > to observe what happens when you evaluate "MyStructure > rebuildFieldAccessors". > > You'll know you are looking at the class-side when you see the class's > class-side definition > MyStructure class > instanceVariableNames: '' > > rather than the class's instance-side definition... > FFIExternalStructure subclass: #MyStructure > instanceVariableNames: '' > classVariableNames: '' > package: 'FFIDemo' > > Pay attention that the documentation says > MyStructure class>>#fieldsDesc > rather than > MyStructure>>#fieldsDesc > > The former is a method on the class-side > and the latter is a method on the instance-side. > > A weak analogy is that you can think of class-side methods > as the methods of MyStructure factory that produces the the Mystructure > objects. > > Actually I can see how "MyStructure class>>#fieldsDesc" can be > ambiguous to newcomers. > Your mind has not yet been conditioned to catch on that detail and and > glosses over it unconsciously thinking "yes, I know MyStructure is a > class. I'm adding a method to it". > This is something that often catches newcomers. I remember getting > caught on it myself. > > Makes me wonder if documentation instead using "MyStructure > classside>>#fieldsDesc" > is more intention revealing, and making the browser button match this > as <Class Side> > would make working with instance/class-side more obvious to newcomers. > > cheers -ben > > On Thu, Apr 20, 2017 at 1:52 PM, Yuriy Babah <babah.yuriy06(a)gmail.com> > wrote: > > > > I have recorded screencast abaut this my operations with Pharo. > > > > https://drive.google.com/open?id=0B_0p5J9SNPlBOHduQlIxdHI0bk0 > > > > But sometimes I'm moved forvard to operations: > > > > MyStructure rebuildFieldAccessors. -> DoIt -> Ok > > > > myStruct := MyStructure externalNew. -> DoIt -> Ok > > > > myStruct := id: 42. -> MessageDoesUnderstood. > > > > I'm doesn't understand in which cases i got to this moment. > > > > I'm associete that with that what i have a several copy's Pharo. > > And somebody affect to other. > > > > 2017-04-19 18:46 GMT+04:00 Ben Coman <btc(a)openinworld.com>: > >> > >> Hi Yuriy, > >> > >> Hope I can help. I tried your example in build 60463 and its works > fine. So lets break it down. > >> > >> On Wed, Apr 19, 2017 at 8:46 PM, Yuriy Babah <babah.yuriy06(a)gmail.com> > wrote: > >>> > >>> Hello everyone, > >>> > >>> I'm new to Pharo and have tried do example with structure in Unified > FFI manual. > >>> > >>> FFIExternalStructure subclass: #MyStructure > >>> instanceVariableNames: '' > >>> classVariableNames: '' > >>> package: 'FFIDemo' > >> > >> > >> You opened a System Browser and entered and accepted the above first on > its own, > >> such that the new package & class were added and the new class selected. > >> > >> Then you clicked on the <Class> button, such that the "no messages" > text in the third pane changed from > >> normal font to bold font. Then clicked on "no messages" to display the > method template.... > >> messageSelectorAndArgumentNames > >> "comment stating purpose of message" > >> | temporary variable names | > >> statements > >> > >> And replaced that text with the text below from "fieldsDesc" onwards, > >> the Accepted that. > >> > >>> > >>> MyStructure class>>#fieldsDesc > >>> ^ #( > >>> uint8 id; > >>> char * struct_name; > >>> uint name_length; > >>> ) > >>> > >> > >> Then separately you evaluated(doIt) the following... > >> > >>> > >>> MyStructure rebuildFieldAccessors > >> > >> > >> > >>> > >>> . -> DoIt -> MessageNotUnderstood > >>> > >>> What's i do wrong? > >> > >> > >> Does a debug window appear? What is the exact text of the title bar, > >> which details which message is not understood by which class. > >> This provides an important hint to what is wrong. > >> > >> Further help might need a live chat. I'll be in discord for a couple of > hours, but ask anyone there... > >> https://discord.gg/KCKQSSt > >> > >> cheers -ben > >> > >>> I do it in > >>> Pharo5 and 6, widows and os x. > >>> Sorry for my english, it's not my native language. > >>> > >> > >> Your english is not too bad :) > >> > >> cheers -ben > > > > > >

April 21, 2017

Re: [Pharo-users] [ANN] Prometheas : a Pharo wiki database

by Dimitris Chloupis

Hey guys I need your help with building the database, I am sure many of you can share small definitions the syntax is quite simple !docadd term "Term is a term and this is its content of definition .More info can be found at http://www.term.com" for example !docadd Nireas "Nireas is a customised blue theme that comes with a gui that allows to change most colors in the theme. More info can be found at https://github.com/kilon/Nireas" the case on the term does not matter all terms are converted to lower case for ease of use. The definition must not be longer than 5 lines. I plan also to add a section for script examples but I have not added that feature yet, so avoid using quotation marks , single or double inside your definition , only regular character and full stops and parentheses. So if you feel like helping, it easy, fast and it will benefit beginners because I plan to add this database inside Pharo. My plan was to add it to playground but I decided to add it to GTSPotter which makes more sense. Thanks for any help on advance.

April 21, 2017

Re: [Pharo-users] example in FFI manual not worked

by Ben Coman

Okay that helps a lot. You've done two things wrong. 1. You actually did.... ExternalStructure subclass: #MyStructure not FFIExternalStructure subclass: #MyStructure This is what caused the error, since if you compare the class-side methods (by clicking the <Class> button) of ExternalStructure and FFIExternalStructure you'll see only the latter has method #rebuildFieldAccessors. 2. You didn't click the <Class> button before adding method #fieldsDesc. This would trip you up after you fix the above. "MyStructure rebuildFieldAccessors" would no longer produce an error but *nothing* would happen when you evaluate it. When you add #fieldsDesc to the class-side, switch back to the instance-side to observe what happens when you evaluate "MyStructure rebuildFieldAccessors". You'll know you are looking at the class-side when you see the class's class-side definition MyStructure class instanceVariableNames: '' rather than the class's instance-side definition... FFIExternalStructure subclass: #MyStructure instanceVariableNames: '' classVariableNames: '' package: 'FFIDemo' Pay attention that the documentation says MyStructure class>>#fieldsDesc rather than MyStructure>>#fieldsDesc The former is a method on the class-side and the latter is a method on the instance-side. A weak analogy is that you can think of class-side methods as the methods of MyStructure factory that produces the the Mystructure objects. Actually I can see how "MyStructure class>>#fieldsDesc" can be ambiguous to newcomers. Your mind has not yet been conditioned to catch on that detail and and glosses over it unconsciously thinking "yes, I know MyStructure is a class. I'm adding a method to it". This is something that often catches newcomers. I remember getting caught on it myself. Makes me wonder if documentation instead using "MyStructure classside>>#fieldsDesc" is more intention revealing, and making the browser button match this as <Class Side> would make working with instance/class-side more obvious to newcomers. cheers -ben On Thu, Apr 20, 2017 at 1:52 PM, Yuriy Babah <babah.yuriy06(a)gmail.com> wrote: > > I have recorded screencast abaut this my operations with Pharo. > > https://drive.google.com/open?id=0B_0p5J9SNPlBOHduQlIxdHI0bk0 > > But sometimes I'm moved forvard to operations: > > MyStructure rebuildFieldAccessors. -> DoIt -> Ok > > myStruct := MyStructure externalNew. -> DoIt -> Ok > > myStruct := id: 42. -> MessageDoesUnderstood. > > I'm doesn't understand in which cases i got to this moment. > > I'm associete that with that what i have a several copy's Pharo. > And somebody affect to other. > > 2017-04-19 18:46 GMT+04:00 Ben Coman <btc(a)openinworld.com>: >> >> Hi Yuriy, >> >> Hope I can help. I tried your example in build 60463 and its works fine. So lets break it down. >> >> On Wed, Apr 19, 2017 at 8:46 PM, Yuriy Babah <babah.yuriy06(a)gmail.com> wrote: >>> >>> Hello everyone, >>> >>> I'm new to Pharo and have tried do example with structure in Unified FFI manual. >>> >>> FFIExternalStructure subclass: #MyStructure >>> instanceVariableNames: '' >>> classVariableNames: '' >>> package: 'FFIDemo' >> >> >> You opened a System Browser and entered and accepted the above first on its own, >> such that the new package & class were added and the new class selected. >> >> Then you clicked on the <Class> button, such that the "no messages" text in the third pane changed from >> normal font to bold font. Then clicked on "no messages" to display the method template.... >> messageSelectorAndArgumentNames >> "comment stating purpose of message" >> | temporary variable names | >> statements >> >> And replaced that text with the text below from "fieldsDesc" onwards, >> the Accepted that. >> >>> >>> MyStructure class>>#fieldsDesc >>> ^ #( >>> uint8 id; >>> char * struct_name; >>> uint name_length; >>> ) >>> >> >> Then separately you evaluated(doIt) the following... >> >>> >>> MyStructure rebuildFieldAccessors >> >> >> >>> >>> . -> DoIt -> MessageNotUnderstood >>> >>> What's i do wrong? >> >> >> Does a debug window appear? What is the exact text of the title bar, >> which details which message is not understood by which class. >> This provides an important hint to what is wrong. >> >> Further help might need a live chat. I'll be in discord for a couple of hours, but ask anyone there... >> https://discord.gg/KCKQSSt >> >> cheers -ben >> >>> I do it in >>> Pharo5 and 6, widows and os x. >>> Sorry for my english, it's not my native language. >>> >> >> Your english is not too bad :) >> >> cheers -ben > >

April 20, 2017

example in FFI manual not worked

by Torsten Bergmann

Hi Yuriy, I guess you subclassed your class from the (wrong) class "ExternalStructure" but in the guide it is "FFIExternalStructure". Make sure to accept in the browser: FFIExternalStructure subclass: #MyStructure instanceVariableNames: '' classVariableNames: '' package: 'FFIDemo' instead of ExternalStructure subclass: #MyStructure instanceVariableNames: '' classVariableNames: '' package: 'FFIDemo' to make the class MyStructure a subclass of FFIExternalStructure instead of ExternalStructure. Hope this helps! Bye Torsten

April 20, 2017

Re: [Pharo-users] example in FFI manual not worked

by Yuriy Babah

I have recorded screencast abaut this my operations with Pharo. https://drive.google.com/open?id=0B_0p5J9SNPlBOHduQlIxdHI0bk0 But sometimes I'm moved forvard to operations: MyStructure rebuildFieldAccessors. -> DoIt -> Ok myStruct := MyStructure externalNew. -> DoIt -> Ok myStruct := id: 42. -> MessageDoesUnderstood. I'm doesn't understand in which cases i got to this moment. I'm associete that with that what i have a several copy's Pharo. And somebody affect to other. 2017-04-19 18:46 GMT+04:00 Ben Coman <btc(a)openinworld.com>: > Hi Yuriy, > > Hope I can help. I tried your example in build 60463 and its works fine. > So lets break it down. > > On Wed, Apr 19, 2017 at 8:46 PM, Yuriy Babah <babah.yuriy06(a)gmail.com> > wrote: > >> Hello everyone, >> >> I'm new to Pharo and have tried do example with structure in Unified FFI >> manual. >> >> FFIExternalStructure subclass: #MyStructure >> instanceVariableNames: '' >> classVariableNames: '' >> package: 'FFIDemo' >> > > You opened a System Browser and entered and accepted the above first on > its own, > such that the new package & class were added and the new class selected. > > Then you clicked on the <Class> button, such that the "no messages" text > in the third pane changed from > normal font to bold font. Then clicked on "no messages" to display the > method template.... > messageSelectorAndArgumentNames > "comment stating purpose of message" > | temporary variable names | > statements > > And replaced that text with the text below from "fieldsDesc" onwards, > the Accepted that. > > >> MyStructure class>>#fieldsDesc >> ^ #( >> uint8 id; >> char * struct_name; >> uint name_length; >> ) >> >> > Then separately you evaluated(doIt) the following... > > >> MyStructure rebuildFieldAccessors >> > > > >> . -> DoIt -> MessageNotUnderstood >> > What's i do wrong? >> > > Does a debug window appear? What is the exact text of the title bar, > which details which message is not understood by which class. > This provides an important hint to what is wrong. > > Further help might need a live chat. I'll be in discord for a couple of > hours, but ask anyone there... > https://discord.gg/KCKQSSt > > cheers -ben > > I do it in >> Pharo5 and 6, widows and os x. >> Sorry for my english, it's not my native language. >> >> > Your english is not too bad :) > > cheers -ben >

April 20, 2017

Re: [Pharo-users] example in FFI manual not worked

by Ben Coman

Hi Yuriy, Hope I can help. I tried your example in build 60463 and its works fine. So lets break it down. On Wed, Apr 19, 2017 at 8:46 PM, Yuriy Babah <babah.yuriy06(a)gmail.com> wrote: > Hello everyone, > > I'm new to Pharo and have tried do example with structure in Unified FFI > manual. > > FFIExternalStructure subclass: #MyStructure > instanceVariableNames: '' > classVariableNames: '' > package: 'FFIDemo' > You opened a System Browser and entered and accepted the above first on its own, such that the new package & class were added and the new class selected. Then you clicked on the <Class> button, such that the "no messages" text in the third pane changed from normal font to bold font. Then clicked on "no messages" to display the method template.... messageSelectorAndArgumentNames "comment stating purpose of message" | temporary variable names | statements And replaced that text with the text below from "fieldsDesc" onwards, the Accepted that. > MyStructure class>>#fieldsDesc > ^ #( > uint8 id; > char * struct_name; > uint name_length; > ) > > Then separately you evaluated(doIt) the following... > MyStructure rebuildFieldAccessors > > . -> DoIt -> MessageNotUnderstood > What's i do wrong? > Does a debug window appear? What is the exact text of the title bar, which details which message is not understood by which class. This provides an important hint to what is wrong. Further help might need a live chat. I'll be in discord for a couple of hours, but ask anyone there... https://discord.gg/KCKQSSt cheers -ben I do it in > Pharo5 and 6, widows and os x. > Sorry for my english, it's not my native language. > > Your english is not too bad :) cheers -ben

April 19, 2017

example in FFI manual not worked

by Yuriy Babah

Hello everyone, I'm new to Pharo and have tried do example with structure in Unified FFI manual. FFIExternalStructure subclass: #MyStructure instanceVariableNames: '' classVariableNames: '' package: 'FFIDemo' MyStructure class>>#fieldsDesc ^ #( uint8 id; char * struct_name; uint name_length; ) MyStructure rebuildFieldAccessors . -> DoIt -> MessageNotUnderstood What's i do wrong? I do it in Pharo5 and 6, widows and os x. Sorry for my english, it's not my native language.

April 19, 2017

Re: [Pharo-users] [Vm-dev] VM/Image magic numbers (Re: Pharo 6 snap install)

by David T. Lewis

On Tue, Apr 18, 2017 at 11:11:07PM +0200, Luke Gorrie wrote: > > On 15 April 2017 at 01:22, Ben Coman <btc(a)openinworld.com> wrote: > > > The "magic decode for image files" seems related and possibly *very* > > useful.... > > http://forum.world.st/magic-decode-for-image-files-td4941712.html#a4941837 > > > > Now traditionally the VM has been backward compatible with old Images, > > but Pharo doesn't necessarily adhere to that and policy IIUC is > > release specific VM/Image pairs. > > So does Pharo require extra magic numbers to co-ordinate this? > > And how would this interact with OpenSmalltalk policy on these magic > > numbers? > > > > I would really like a copy of the script that checks the magic number and > starts the right VM. David, could you share yours please? Attached. Dave

April 18, 2017