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

Re: [Pharo-users] Reverse interval

by Dimitris Chloupis

mainly because in my 30 years of coding for fun I never gave a damn what C or other languages try to convince us what expected behaviour is , its one of the big reason why I code in Smalltalk ;) plus I hate C/C++ with a vengeance , so :D On Thu, Jan 5, 2017 at 10:38 AM Esteban Lorenzano <estebanlm(a)gmail.com> wrote: > On 5 Jan 2017, at 09:29, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > > cant say it makes sense for me , why it assumes I want to +0.01 when I > give 0.5 to 0.01 when it should assume I want to -0.01 ? is there a > scenario that would not be true ? > > > take it this way: in C youâll need to write: > > for (int i = 0.50; i >= 0.1; i-=0.01) â¦ > > which is also explicit about the decreasing âiââ¦ so I donât understand why > it does not makes sense for you :) > > Esteban > > > in any case its better than reversedo , thank you > > On Thu, Jan 5, 2017 at 10:20 AM Esteban Lorenzano <estebanlm(a)gmail.com> > wrote: > > this is correct behaviour (since 0.50 + 0.01 will be bigger than 0.01), > correct way to define this step is: > > (0.50 to: 0.01 by: -0.01) do:[ :each| tp := tp + each ]. > > (by: *-*0.01), negative > > Esteban > > > On 5 Jan 2017, at 09:15, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > > hey guys I try to do a reverse interval like this > > tp := 0.0. > (0.50 to: 0.01 by: 0.01) do:[ :each| tp := tp + each ]. > tp inspect. > > and I get nothing , is this a bug or a feature ? > > i see a reverse method but looks weird to go that way and not very > smalltalky / pharoic > > >

Jan. 5, 2017

Re: [Pharo-users] Reverse interval

by Esteban Lorenzano

> On 5 Jan 2017, at 09:29, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > > cant say it makes sense for me , why it assumes I want to +0.01 when I give 0.5 to 0.01 when it should assume I want to -0.01 ? is there a scenario that would not be true ? take it this way: in C youâll need to write: for (int i = 0.50; i >= 0.1; i-=0.01) â¦ which is also explicit about the decreasing âiââ¦ so I donât understand why it does not makes sense for you :) Esteban > > in any case its better than reversedo , thank you > > On Thu, Jan 5, 2017 at 10:20 AM Esteban Lorenzano <estebanlm(a)gmail.com <mailto:estebanlm@gmail.com>> wrote: > this is correct behaviour (since 0.50 + 0.01 will be bigger than 0.01), > correct way to define this step is: > > (0.50 to: 0.01 by: -0.01) do:[ :each| tp := tp + each ]. > > (by: -0.01), negative > > Esteban > > >> On 5 Jan 2017, at 09:15, Dimitris Chloupis <kilon.alios(a)gmail.com <mailto:kilon.alios@gmail.com>> wrote: >> >> hey guys I try to do a reverse interval like this >> >> tp := 0.0. >> (0.50 to: 0.01 by: 0.01) do:[ :each| tp := tp + each ]. >> tp inspect. >> >> and I get nothing , is this a bug or a feature ? >> >> i see a reverse method but looks weird to go that way and not very smalltalky / pharoic >

Jan. 5, 2017

Re: [Pharo-users] Reverse interval

by jtuchel＠objektfabrik.de

Well, it makes sense if you think of the implementation of to:by:do: as a loop. How would you implement the stop condition? Does every case where start>stop mean you want to walk backwards? Joachim Am 05.01.17 um 09:29 schrieb Dimitris Chloupis: > cant say it makes sense for me , why it assumes I want to +0.01 when I > give 0.5 to 0.01 when it should assume I want to -0.01 ? is there a > scenario that would not be true ? > > in any case its better than reversedo , thank you > > On Thu, Jan 5, 2017 at 10:20 AM Esteban Lorenzano <estebanlm(a)gmail.com > <mailto:estebanlm@gmail.com>> wrote: > > this is correct behaviour (since 0.50 + 0.01 will be bigger than > 0.01), > correct way to define this step is: > > (0.50 to: 0.01 by: -0.01) do:[ :each| tp := tp + each ]. > > (by: *-*0.01), negative > > Esteban > > >> On 5 Jan 2017, at 09:15, Dimitris Chloupis <kilon.alios(a)gmail.com >> <mailto:kilon.alios@gmail.com>> wrote: >> >> hey guys I try to do a reverse interval like this >> >> tp := 0.0. >> (0.50 to: 0.01 by: 0.01) do:[ :each| tp := tp + each ]. >> tp inspect. >> >> and I get nothing , is this a bug or a feature ? >> >> i see a reverse method but looks weird to go that way and not >> very smalltalky / pharoic > -- ----------------------------------------------------------------------- Objektfabrik Joachim Tuchel mailto:jtuchel@objektfabrik.de Fliederweg 1 http://www.objektfabrik.de D-71640 Ludwigsburg http://joachimtuchel.wordpress.com Telefon: +49 7141 56 10 86 0 Fax: +49 7141 56 10 86 1

Jan. 5, 2017

Re: [Pharo-users] Reverse interval

by Dimitris Chloupis

cant say it makes sense for me , why it assumes I want to +0.01 when I give 0.5 to 0.01 when it should assume I want to -0.01 ? is there a scenario that would not be true ? in any case its better than reversedo , thank you On Thu, Jan 5, 2017 at 10:20 AM Esteban Lorenzano <estebanlm(a)gmail.com> wrote: > this is correct behaviour (since 0.50 + 0.01 will be bigger than 0.01), > correct way to define this step is: > > (0.50 to: 0.01 by: -0.01) do:[ :each| tp := tp + each ]. > > (by: *-*0.01), negative > > Esteban > > > On 5 Jan 2017, at 09:15, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > > hey guys I try to do a reverse interval like this > > tp := 0.0. > (0.50 to: 0.01 by: 0.01) do:[ :each| tp := tp + each ]. > tp inspect. > > and I get nothing , is this a bug or a feature ? > > i see a reverse method but looks weird to go that way and not very > smalltalky / pharoic > > >

Jan. 5, 2017

Re: [Pharo-users] Reverse interval

by Esteban Lorenzano

this is correct behaviour (since 0.50 + 0.01 will be bigger than 0.01), correct way to define this step is: (0.50 to: 0.01 by: -0.01) do:[ :each| tp := tp + each ]. (by: -0.01), negative Esteban > On 5 Jan 2017, at 09:15, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > > hey guys I try to do a reverse interval like this > > tp := 0.0. > (0.50 to: 0.01 by: 0.01) do:[ :each| tp := tp + each ]. > tp inspect. > > and I get nothing , is this a bug or a feature ? > > i see a reverse method but looks weird to go that way and not very smalltalky / pharoic

Jan. 5, 2017

improving add parameter refactoring

by Stephane Ducasse

Hi john I'm facing the following situation and I was wondering if a simple heuristic could not improve the situation (where edge cases will always be a problem). I got a hierarchy of expressions implementing evaluate and I wanted to add a parameter (the binding). So Add Parameter worked but broke evaluate recursive methods. Here is a part of the book I'm writing [[[ EConstant >> testEvaluate self assert:(EConstant new value: 5) evaluate equals: 5 ]]] is transformed as follows: [[[ EConstant >> testEvaluate self assert: ((EConstant new value: 5) evaluateWith: Dictionary new) equals: 5 ]]] Your tests should nearly all pass except the ones on variables. Why do they fail? Because the refactoring transformed message sends ==evaluate== but ==evaluateWith: Dictionary new== and this even in methods ==evaluate==. [[[ EAddition >> evaluateWith: anObject ^ (right evaluateWith: Dictionary new) + (left evaluateWith: Dictionary new) ]]] [[[ EAddition >> evaluateWith: anObject ^ (right evaluateWith: anObject) + (left evaluateWith: anObject) ]]] And I was wondering if a good heuristic would be to change the parameter. Now I have the impression that the refactoring is done it two passes. So this is more tricky than it looks. Stef

Jan. 5, 2017

Reverse interval

by Dimitris Chloupis

hey guys I try to do a reverse interval like this tp := 0.0. (0.50 to: 0.01 by: 0.01) do:[ :each| tp := tp + each ]. tp inspect. and I get nothing , is this a bug or a feature ? i see a reverse method but looks weird to go that way and not very smalltalky / pharoic

Jan. 5, 2017

Re: [Pharo-users] Call of projects of open-dev lectures

by stepharong

We will present the project to them. Stef > > Hi, > > I think that Grafoscopio could benefit a lot from newbies. I'm still > kind of one, so I don't know if I have the expertise to guide them, but > I can help as a peer, literally. We can provide an >environment where > newbies can learn about the integration of exploratory computing, > interactive documentation and data activism & visualization, but mainly > about how can newbies can be >empowered by the Pharo ecosystem and > communities to prototype their ideas. As I have said several times, > Grafoscopio is my first Smalltalk "app", so is full of rookie code > everywhere (and they >can learn from it also), but despite of that is a > functional artifact and has bootstrapped interesting local dynamics, > some international interest, and let me become an active member of this > >community. If this experience helps in someway to newbies, they're most > than welcomed to our community. > - Web page (English): http://mutabit.com/grafoscopio/index.en.html > - Mailing list (Spanish, but we can handle English): > https://lists.riseup.net/www/arc/grafoscopio > - Bug Tracker: http://mutabit.com/repos.fossil/grafoscopio/ticket > > Let me know, so I can tell the locals we're going to have some guests in > our community. > > Cheers, > > Offray > > On 04/01/17 09:48, Stephane Ducasse wrote: >> Hi >>We are organising a lecture where students should >> - learn pharo >> - learn how to communicate with open source community >> - learn how to reverse engineer, fix bugs.... >> They should work by 3/4. >>We are looking for projects that would like to accept >> - propose some bugs to be fixed >> - to communicate with newbies and from time to time >>I was thinking about >> - MDL >> - Roassal >> - Moose ? >> - Pillar ? but nobody beside me and I do not have the time >> - DRGeoII >> - Telescope >> - Artefact >> - Scale >> - Ecstatic >>So if you have a project and you want to participate. >> We would like to have >> - web page? >> - mailing-list >> - bug trackers/todo? >>Stef > -- Using Opera's mail client: http://www.opera.com/mail/

Jan. 4, 2017

Call of projects of open-dev lectures

by stepharong

Hi We are organising a lecture where students should - learn pharo - learn how to communicate with open source community - learn how to reverse engineer, fix bugs.... They should work by 3/4. We are looking for projects that would like to accept - propose some bugs to be fixed - to communicate with newbies and from time to time I was thinking about - MDL - Roassal - Moose ? - Pillar ? but nobody beside me and I do not have the time - DRGeoII - Telescope - Artefact - Scale - Ecstatic So if you have a project and you want to participate. We would like to have - web page? - mailing-list - bug trackers/todo? Stef -- Using Opera's mail client: http://www.opera.com/mail/

Jan. 4, 2017

Re: [Pharo-users] [Pharo-dev] Call of projects of open-dev lectures

by Damien Pollet

Perhaps the most important is that the project has maintainers who can be reasonably reactive (so that the students can at least interact and get feedback on a weekly basis). If you can identify beginner-friendly issues and tasks, that would be great too. On 4 January 2017 at 16:41, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: > PolyMath issues are here: > > https://github.com/PolyMathOrg/PolyMath/issues > > > > On Wed, Jan 4, 2017 at 3:48 PM, Stephane Ducasse > <stepharo.self(a)gmail.com> wrote: > > Hi > > > > We are organising a lecture where students should > > - learn pharo > > - learn how to communicate with open source community > > - learn how to reverse engineer, fix bugs.... > > They should work by 3/4. > > > > We are looking for projects that would like to accept > > - propose some bugs to be fixed > > - to communicate with newbies and from time to time > > > > I was thinking about > > - MDL > > - Roassal > > - Moose ? > > - Pillar ? but nobody beside me and I do not have the time > > - DRGeoII > > - Telescope > > - Artefact > > - Scale > > - Ecstatic > > > > So if you have a project and you want to participate. > > We would like to have > > - web page? > > - mailing-list > > - bug trackers/todo? > > > > Stef > > > > -- > Serge Stinckwich > UCBN & UMI UMMISCO 209 (IRD/UPMC) > Every DSL ends up being Smalltalk > http://www.doesnotunderstand.org/ > > -- Damien Pollet type less, do more [ | ] http://people.untyped.org/damien.pollet

Jan. 4, 2017