June 2014 - Pharo-users - lists.pharo.org

Reading the last n lines from a file without using lots of memory

by phil＠highoctane.be

I wonder how you guys would read the last n lines from a file in Pharo without reading through the whole thing. Is there code doing just that somewhere? The code I have is a shell script doing a 'tac file | tail -200 > /temp/something' I can always do that through OSProcess but wondered if there was something available. Reading through with a 200-entries FIFO circular buffer seems a bit silly to do. TIA Phil

June 27, 2014

Re: [Pharo-users] A question about sets

by hilaire

Why do you need a set for that? An array is enough. But please go on. Hilaire -- View this message in context: http://forum.world.st/A-question-about-sets-tp4763094p4765282.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

June 27, 2014

Re: [Pharo-users] [Pharo-dev] spec question

by Yuriy Tymchuk

Sorry, a small remark, as you mentioned fonts. We could use the icon magic that for example github is using: http://octicons.github.com Uko On 27 Jun 2014, at 09:29, stepharo <stepharo(a)free.fr> wrote: > Hi guys > > I do not have the answer but I know that I want to slowly make sure that all the widgets manages better the fonts and not blindly refer to > StandardsFont. > > Setf > > >> >> 2014-06-26 23:13 GMT+02:00 Pablo R. Digonzelli <pdigonzelli(a)gmail.com>: >> >> Hi all, two questions about Spec. >> >> 1) How can i change the font for a ListModel or TextModel? >> >> 2) I try , but nothing happend . I does not work but there is no error also >> >> l := ListModel new. >> l backgroundColorBlock: [ Color red ]. >> l openWithSpec . >> >> Can I change de backcolor of ListModel ? >> >> Sorry for my english. >> >> TIA >> >> >> >> Ing. Pablo Digonzelli >> Software Solutions >> IP-Solutiones SRL >> Metrotec SRL >> 25 de Mayo 521 >> Email: pdigonzelli(a)softsargentina.com >> pdigonzelli(a)gmail.com >> Cel: 5493815982714 >> >> >> >> >> About the font: I don't know if this is possible. >> >> For the background color: >> >> This works only for the background of the list cells. If there is no entry >> in your listmodel list, the list view is empty as well and there is nothing >> to show. >> >> This works: >> >> ListModel new >> items: (1 to: 10); >> backgroundColorBlock: [ :item :index |Color red ]; >> openWithSpec. >> >> or with more colors :) >> >> ListModel new >> items: Color registeredColorNames ; >> backgroundColorBlock: [ :item :index | Color named:item]; >> openWithSpec. >> >> >

June 27, 2014

Re: [Pharo-users] [Pharo-dev] spec question

by stepharo

Hi guys I do not have the answer but I know that I want to slowly make sure that all the widgets manages better the fonts and not blindly refer to StandardsFont. Setf > > 2014-06-26 23:13 GMT+02:00 Pablo R. Digonzelli <pdigonzelli(a)gmail.com > <mailto:pdigonzelli@gmail.com>>: > > > Hi all, two questions about Spec. > > 1) How can i change the font for a ListModel or TextModel? > > 2) I try , but nothing happend . I does not work but there is no > error also > > l := ListModel new. > l backgroundColorBlock: [ Color red ]. > l openWithSpec . > > Can I change de backcolor of ListModel ? > > Sorry for my english. > > TIA > > > > **** > ------------------------------------------------------------------------ > *Ing. Pablo Digonzelli* > Software Solutions > IP-Solutiones SRL > Metrotec SRL > 25 de Mayo 521 > Email: pdigonzelli(a)softsargentina.com > <mailto:pdigonzelli@softsargentina.com> > pdigonzelli(a)gmail.com <mailto:pdigonzelli@gmail.com> > Cel: 5493815982714 > > > > > About the font: I don't know if this is possible. > > For the background color: > > This works only for the background of the list cells. If there is no entry > in your listmodel list, the list view is empty as well and there is > nothing > to show. > > This works: > > ListModel new > items: (1 to: 10); > backgroundColorBlock: [ :item :index |Color red ]; > openWithSpec. > > or with more colors :) > > ListModel new > items: Color registeredColorNames ; > backgroundColorBlock: [ :item :index | Color named:item]; > openWithSpec. > >

June 27, 2014

Re: [Pharo-users] [Pharo-dev] [Tutorial] Rediscovering the UX of the legendary HP-35 Scientific Pocket Calculator

by Sven Van Caekenberghe

On 26 Jun 2014, at 16:39, Peter Gragert <pkhgragert(a)gmail.com> wrote: > Got it working ( as a sorcerers apprentice) ;-). > > Thanks ... now reading your web page will make (more) sense to me .. Great. > By the way, I programmed the HP 32S with Python on Ipad ... (programming part not finished, yet, and some small quirks ;-( ). I think, your info about your Pharo implementation will help to review my Python version ... Yes, that is a nice one as well. It is a nice project to try to implement an emulator, a pretty deep subject. > 2014-06-26 9:06 GMT+02:00 Sven Van Caekenberghe <sven(a)stfx.eu>: > Peter, > > Yes, the highest numbered .mcz file is the latest. > > In the appendix, I describe the different ways you can get the code, in order of increasing complexity - you took the latest ;-) > > Anyway, I hope you figure it out. > > Sven > > On 26 Jun 2014, at 08:50, Peter Gragert <pkhgragert(a)gmail.com> wrote: > > > Sven, not used Pharo for a long time, I forgot nearly all of it ... so I need help how to activate YOUR *.mcz files > > and what does the different numbers mean? Version ... so ... one should always try the latest or all?? > > > > > > 2014-06-25 23:23 GMT+02:00 Tudor Girba <tudor(a)tudorgirba.com>: > > This really is beautiful! > > > > Doru > > > > > > On Wed, Jun 25, 2014 at 3:29 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > Hi, > > > > I have written a new, extensive, long form, introductory article about Pharo. > > > > Rediscovering the UX of the legendary HP-35 Scientific Pocket Calculator > > > > A tutorial on Pharo, test and specification based immersive programming > > > > https://medium.com/@svenvc/rediscovering-the-ux-of-the-legendary-hp-35-scie… > > > > > > It is a bit different because > > > > - it is based on a non-trivial example > > - it uses a backdrop story unrelated to Pharo > > - it uses several multimedia elements > > - it is published on medium.com which is a general publishing platform > > > > The appendix describes several ways you can get the code. I think building both a Spec and Seaside UI from the same specification as well as reusing functional tests in different contexts is cool. Anyway, I hope you enjoy it. > > > > Sven > > > > -- > > Sven Van Caekenberghe > > Proudly supporting Pharo > > http://pharo.org > > http://association.pharo.org > > http://consortium.pharo.org > > > > > > > > > > -- > > www.tudorgirba.com > > > > "Every thing has its own flow" > > > > >

June 27, 2014

Re: [Pharo-users] [Pharo-dev] spec question

by Nicolai Hess

2014-06-26 23:13 GMT+02:00 Pablo R. Digonzelli <pdigonzelli(a)gmail.com>: > > Hi all, two questions about Spec. > > 1) How can i change the font for a ListModel or TextModel? > > 2) I try , but nothing happend . I does not work but there is no error > also > > l := ListModel new. > l backgroundColorBlock: [ Color red ]. > l openWithSpec . > > Can I change de backcolor of ListModel ? > > Sorry for my english. > > TIA > > > > ------------------------------ > *Ing. Pablo Digonzelli* > Software Solutions > IP-Solutiones SRL > Metrotec SRL > 25 de Mayo 521 > Email: pdigonzelli(a)softsargentina.com > pdigonzelli(a)gmail.com > Cel: 5493815982714 > > > About the font: I don't know if this is possible. For the background color: This works only for the background of the list cells. If there is no entry in your listmodel list, the list view is empty as well and there is nothing to show. This works: ListModel new items: (1 to: 10); backgroundColorBlock: [ :item :index |Color red ]; openWithSpec. or with more colors :) ListModel new items: Color registeredColorNames ; backgroundColorBlock: [ :item :index | Color named:item]; openWithSpec.

June 26, 2014

spec question

by Pablo R. Digonzelli

Hi all, two questions about Spec. 1) How can i change the font for a ListModel or TextModel? 2) I try , but nothing happend . I does not work but there is no error also l := ListModel new. l backgroundColorBlock: [ Color red ]. l openWithSpec . Can I change de backcolor of ListModel ? Sorry for my english. TIA Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 Email: pdigonzelli(a)softsargentina.com pdigonzelli(a)gmail.com Cel: 5493815982714

June 26, 2014

spec question

by Pablo R. Digonzelli

Hi all, two questions about Spec. 1) How can i change the font for a ListModel or TextModel? 2) I try , but nothing happend . I does not work but there is no error also l := ListModel new. l backgroundColorBlock: [ Color red ]. l openWithSpec . Can I change de backcolor of ListModel ? Sorry for my english. TIA Ing. Pablo Digonzelli Software Solutions IP-Solutiones SRL Metrotec SRL 25 de Mayo 521 Email: pdigonzelli(a)softsargentina.com pdigonzelli(a)gmail.com Cel: 5493815982714

June 26, 2014

Re: [Pharo-users] Loading petitparser when Voyage is loaded is taking an awful long time

by Tudor Girba

Hi, On Thu, Jun 26, 2014 at 8:45 AM, phil(a)highoctane.be <phil(a)highoctane.be> wrote: > I use it. > Great > Now, how can one paste text in the lower pane? I can't get that working > and it is frustrating. Especially when I do have long external samples. > What do you mean? Cmd+v should work. It works for me. Does it not work for you? > I also got some out of memory errors when a grammar loops on itself in a > wrong way. Which is what happend when trying things out. > There should be a kind of limit one could customize. Especially when > hitting 'example'tab... :-) > That would be quite nice indeed. I would not know how to do it though :(. > I should have a shot at GT... > > I am using Pharo3. > Let me know if I can be of help. Cheers, Doru > Phil > Le 26 juin 2014 00:52, "Tudor Girba" <tudor(a)tudorgirba.com> a Ã©crit : > > If you want to use PetitParser at full speed, you should take a look at >> the dedicated PetitParser browser: PPBrowser open. >> >> And if you want to really go into it, you can also use the dedicated >> inspector and debugger from GT. >> >> Cheers, >> Doru >> >> >> On Tue, Jun 24, 2014 at 2:25 PM, phil(a)highoctane.be <phil(a)highoctane.be> >> wrote: >> >>> Thanks, didn't knew about this. >>> >>> BTW, PetitParser is really awesome. Up and running in a couple hours. >>> Wow. >>> >>> Phil >>> >>> >>> >>> >>> On Tue, Jun 24, 2014 at 2:00 PM, Mariano Martinez Peck < >>> marianopeck(a)gmail.com> wrote: >>> >>>> What if you put your gofer expression to load PetitParser in a block >>>> closure and then: >>>> >>>> SystemAnnouncer uniqueInstance suspendAllWhile: [ Gofer it ... ] >>>> >>>> ? >>>> >>>> (I don't know what Pharo version you are using...but if that doesn't >>>> work check in BlockClosure for doSilently: or something similar). >>>> >>>> Best, >>>> >>>> >>>> On Tue, Jun 24, 2014 at 5:52 AM, phil(a)highoctane.be <phil(a)highoctane.be >>>> > wrote: >>>> >>>>> Looks like there is an announcement for added methods that is used by >>>>> Voyage when loading packages. >>>>> >>>>> I was loading PetitParser and the image appeared unresponsive for >>>>> quite a while. >>>>> >>>>> Is there a way to disable that check temporarily? >>>>> >>>>> Phil >>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> Mariano >>>> http://marianopeck.wordpress.com >>>> >>> >>> >> >> >> -- >> www.tudorgirba.com >> >> "Every thing has its own flow" >> > -- www.tudorgirba.com "Every thing has its own flow"

June 26, 2014

Re: [Pharo-users] A question about sets

by Alain Busser

About the use of sets I found another idea: Eratosthene's sieve. Basically you create a set containing all integers from 2 to, say, 200. Then, beginning with 2, you choose remove all multiples of the number you choose from the set. Then you go to the next number in the set and so on... The difficulty is to choose the right collection, as a set is not ordered and it is not easy to loop on the prime divisors... I made it on this article (near the middle): http://irem.univ-reunion.fr/spip.php?article742 Of course you can have the set of primes directly under Pharo with isPrime as we did here: http://www.epi.asso.fr/revue/articles/a1211b.htm (I had forgotten this) Alain On Thu, Jun 26, 2014 at 8:21 PM, Hilaire Fernandes < hilaire.fernandes(a)gmail.com> wrote: > Great! > Now I wonder how it could be used within Dr. Geo. > > Thanks > > Hilaire > > Le 25/06/2014 18:33, Alain Busser a Ã©crit : > > About the birthday problem, I already pulished something that I had > > exeperimented in the classroom, but it is in French: > > http://irem.univ-reunion.fr/spip.php?article618 (clic on "problÃ¨me des > > anniversaires" tab). The idea is that if you add say 30 times a "365 > > atRandom" to a bag (instead of a set) it happens now and then that a > > number appear more than once. In this classroom, two students actually > > had the same birthday, and they were eager to know of it happens often, > > so that they were very active for this exercise. > > > > Happy reading ;-) > > > > Alain > > > > > > On Wed, Jun 25, 2014 at 12:10 PM, hilaire > > <hfern(a)free.fr > > <mailto:hfern@free.fr>> wrote: > > > > Alain, > > > > I love very much your cultural insight and I would like to see more > > examples > > like this one applied to Dr. Geo scripting or Smalltalk sketches. > > Personally, I don't have the time to both develop Dr. Geo *and* to > > investigate such examples; contributions like yours are more than > > welcome. > > > > Thanks > > > > Hilaire > > > > > > > > -- > > View this message in context: > > http://forum.world.st/A-question-about-sets-tp4763094p4764640.html > > Sent from the Pharo Smalltalk Users mailing list archive at > Nabble.com. > > > > > > -- > Dr. Geo http://drgeo.eu > iStoa - https://launchpad.net/istoa > > >

June 26, 2014