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

Re: [Pharo-users] How childrenBlock: in TreeModel works

by Ð¥ÑÐ¸ÑÑÐ¸Ð½Ð° ÐÐ¸ÑÐ°Ð¹Ð»ÑÐº

Now I understand. Thank you very much! =) 2017-04-01 17:48 GMT+03:00 Peter Uhnak <i.uhnak(a)gmail.com>: > Hi, > > I wanted to point you to the new Spec book ( http://files.pharo.org/books- > pdfs/spec/2017-01-23-SpecBooklet.pdf ), but apprently it's not there. > > Many Spec widgets have examples accompanying them, so always check class > side (not for all though). For TreeModel you can see couple there - good > for playing around; e.g. > > exampleWithNoSpecifiedNodes > "self exampleWithNoSpecifiedNodes" > TreeModel new > roots: (1 to: 5); > childrenBlock: [ :item | 1+item to: 5+item ]; > openWithSpec > > You specify the initial data (root nodes) via the `roots:` message. > The `childrenBlock:` then specifies how one would retrieve data given a > particular node; note that this applies to _any node_, not just the root > ones; so you can have potentially infinitely deep trees. > > A more complex example could be this (this is awful code for demonstration > only ;): > > TreeModel new > roots: {#parent. #childless. 20. #root -> #(a b c)}; > childrenBlock: [ :item | > item isSymbol ifTrue: [ > item = #parent > ifTrue: [ #(child1 child2) ] > ifFalse: [ #() ] > ] ifFalse: [ > item isNumber > ifTrue: [ {item + 2. item ** 2} ] > ifFalse: [ "association" item value ] > ] > ]; > openWithSpec > > > Peter > > On Sat, Apr 01, 2017 at 06:49:41AM -0700, chrismihaylyk wrote: > > Hi! > > > > Could anyone explain me how works childrenBlock: method from TreeModel? > > step-by-step. > > What data it operates? How makes a result? > > > > Thanks a lot? Khrystyna. > > > > > > > > > > > > -- > > View this message in context: http://forum.world.st/How- > childrenBlock-in-TreeModel-works-tp4940884.html > > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > > > >

April 1, 2017

Re: [Pharo-users] Breaking News

by Ben Coman

Too quick Offray :) Shoulda let it run... cheers -ben On Sun, Apr 2, 2017 at 1:28 AM, Offray Vladimir Luna CÃ¡rdenas < offray.luna(a)mutabit.com> wrote: > Ohhh... April 1st.... (the local date for that is Dec 28th, so it always > kind of confuse me). > > Cheers, > > Offray > > > > On 01/04/17 12:22, Offray Vladimir Luna CÃ¡rdenas wrote: > >> Hi, >> >> Thanks for sharing. There is any link to the HPE site on the news about >> investing 1.2 billion in the R & D Research Lab? >> >> Cheers, >> >> Offray >> >> >> On 01/04/17 11:10, horrido wrote: >> >>> Smalltalk to get a second crack at the whip >>> <https://medium.com/@richardeng/smalltalk-to-get-a-second- >>> crack-at-the-whip-ecaeb8a94533> >>> . By frickin' time! >>> >>> >>> >>> -- >>> View this message in context: http://forum.world.st/Breaking >>> -News-tp4940893.html >>> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >>> >>> >>> >> >> >> > >

April 1, 2017

In the quest of Smacc idioms

by Stephane Ducasse

Hi I'm trying to understand what are the idioms in Smacc when converting from ANTLR ######### the case of * ######################## Function = â(â (',' Arguments )* â)â should be transformed into Function : <name> "(" 'leftParen' _ArgumentsOption ")" 'rightParen' {{}} ; _ArgumentsOption : | Arguments ; Arguments : Expression 'argument' | Arguments "," Expression 'argument' ; Here since there is a recursion in Arguments the instance variable containing a list of argument will be added to the FunctionNode Pay attention that Expression 'argument' should not have a {{}} nor its parent rule. ######### the case of + ######################## Function = â(â Arguments + â)â should be transformed into Function : <name> "(" 'leftParen' _ArgumentsOption ")" 'rightParen' {{}} ; _ArgumentsOption : Arguments ; Arguments : Expression 'argument' | Arguments "," Expression 'argument' ; ######### the case of ? ######################## Function = â(â Arguments+ â)â should be transformed into Function : <name> "(" 'leftParen' _ArgumentsOption ")" 'rightParen' {{}} ; _ArgumentsOption : | Arguments ; Arguments : Expression 'argument' ; Is there a more compact way to express? Thierry do you have example of *, + , ? in the grammar? Stef

April 1, 2017

Re: [Pharo-users] Breaking News

by Ben Coman

On Sun, Apr 2, 2017 at 12:10 AM, horrido <horrido.hobbies(a)gmail.com> wrote: > Smalltalk to get a second crack at the whip > <https://medium.com/@richardeng/smalltalk-to-get-a- > second-crack-at-the-whip-ecaeb8a94533> > . By frickin' time! > > Lovely article Richard. I want to believe this is really a turning point for Smalltalk. cheers -ben

April 1, 2017

Re: [Pharo-users] Breaking News

by Offray Vladimir Luna CÃ¡rdenas

Ohhh... April 1st.... (the local date for that is Dec 28th, so it always kind of confuse me). Cheers, Offray On 01/04/17 12:22, Offray Vladimir Luna CÃ¡rdenas wrote: > Hi, > > Thanks for sharing. There is any link to the HPE site on the news > about investing 1.2 billion in the R & D Research Lab? > > Cheers, > > Offray > > > On 01/04/17 11:10, horrido wrote: >> Smalltalk to get a second crack at the whip >> <https://medium.com/@richardeng/smalltalk-to-get-a-second-crack-at-the-whip-…> >> >> . By frickin' time! >> >> >> >> -- >> View this message in context: >> http://forum.world.st/Breaking-News-tp4940893.html >> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >> >> > > >

April 1, 2017

Re: [Pharo-users] Breaking News

by Offray Vladimir Luna CÃ¡rdenas

Hi, Thanks for sharing. There is any link to the HPE site on the news about investing 1.2 billion in the R & D Research Lab? Cheers, Offray On 01/04/17 11:10, horrido wrote: > Smalltalk to get a second crack at the whip > <https://medium.com/@richardeng/smalltalk-to-get-a-second-crack-at-the-whip-…> > . By frickin' time! > > > > -- > View this message in context: http://forum.world.st/Breaking-News-tp4940893.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

April 1, 2017

Breaking News

by horrido

Smalltalk to get a second crack at the whip <https://medium.com/@richardeng/smalltalk-to-get-a-second-crack-at-the-whip-…> . By frickin' time! -- View this message in context: http://forum.world.st/Breaking-News-tp4940893.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

April 1, 2017

Re: [Pharo-users] Morphic component to display images/pictures

by Stephane Ducasse

Cool (for the interpreter refactoring). Let us know when you have something. I thought that you wanted to display an image. On Sat, Apr 1, 2017 at 11:44 AM, Peter Uhnak <i.uhnak(a)gmail.com> wrote: > The mooc challenge (no #4) doesn't really address any of the things I am > interested in (the result is the same as what inspector can currently do). > > Spec has ImageModel, but that doesn't even have scrollbars... > > anyway... I am currently refactoring Spec interpreter and after that I > would like to improve some things... so maybe I could improve the > ImageModel, since we don't have what I want... > > Peter > > > On Sat, Apr 01, 2017 at 09:58:26AM +0200, Hilaire wrote: > > Just by curiosity: can it be done with Spec ? > > > > Hilaire > > > > Le 31/03/2017 Ã 08:16, Stephane Ducasse a Ã©crit : > > > have a look at the solution of the challenge 2 or 3 in the mooc :) > > > > > > > -- > > Dr. Geo > > http://drgeo.eu > > > > > >

April 1, 2017

Smalltalk/Java job in france

by Stephane Ducasse

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April 1, 2017

Re: [Pharo-users] How childrenBlock: in TreeModel works

by Peter Uhnak

Hi, I wanted to point you to the new Spec book ( http://files.pharo.org/books-pdfs/spec/2017-01-23-SpecBooklet.pdf ), but apprently it's not there. Many Spec widgets have examples accompanying them, so always check class side (not for all though). For TreeModel you can see couple there - good for playing around; e.g. exampleWithNoSpecifiedNodes "self exampleWithNoSpecifiedNodes" TreeModel new roots: (1 to: 5); childrenBlock: [ :item | 1+item to: 5+item ]; openWithSpec You specify the initial data (root nodes) via the `roots:` message. The `childrenBlock:` then specifies how one would retrieve data given a particular node; note that this applies to _any node_, not just the root ones; so you can have potentially infinitely deep trees. A more complex example could be this (this is awful code for demonstration only ;): TreeModel new roots: {#parent. #childless. 20. #root -> #(a b c)}; childrenBlock: [ :item | item isSymbol ifTrue: [ item = #parent ifTrue: [ #(child1 child2) ] ifFalse: [ #() ] ] ifFalse: [ item isNumber ifTrue: [ {item + 2. item ** 2} ] ifFalse: [ "association" item value ] ] ]; openWithSpec Peter On Sat, Apr 01, 2017 at 06:49:41AM -0700, chrismihaylyk wrote: > Hi! > > Could anyone explain me how works childrenBlock: method from TreeModel? > step-by-step. > What data it operates? How makes a result? > > Thanks a lot? Khrystyna. > > > > > > -- > View this message in context: http://forum.world.st/How-childrenBlock-in-TreeModel-works-tp4940884.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. >

April 1, 2017