February 2018 - Pharo-users

Re: [Pharo-users] Object configuration idioms

by Stephane Ducasse

Nice discussion. Thanks Christian. On Mon, Feb 12, 2018 at 10:36 AM, Christian Haider <christian.haider(a)smalltalked-visuals.com> wrote: > Hi, > > > > sorry to jump in here, but I think that this pattern is bad. > > > > For your approach, you need to have setters on the configuration. > > Do you really want to have methods to set the username and password from the > outside â maybe even after you logged in? > > > > To me an object like your configuration should be a value, which can be > created but may never be modified after creation. > > For this I would define a constructor: > > > > TwitterConfiguration class>>username: aString password: anotherString > > | inst | > > inst := self new. > > inst initializeUsername: aString password: anotherString. > > ^inst > > > > And an initializer: > > > > TwitterConfiguration>> initializeUsername: aString password: anotherString > > username := aString. > > password := anotherString > > > > The two setters #username: and #password: should be deleted. > > > > With TwitterClient at top, I would use constructors as well: > > > > TwitterClient class>>username: aString password: anotherString > > | inst | > > inst := self new. > > inst initializeConfiguration: (TwitterConfiguration > username: aString password: anotherString). > > ^inst > > > > The nice thing about constructors is that the user knows what arguments are > expected to get a valid object. > > > > The initializers are intentionally prefixed with the cumbersome > âinitializeâ¦â to indicate that they should not be confused with > (multi-)setters. > > (in VW, I additionally make these kinds of objects immutable to really make > sure that the object cannot be modified after creation.) > > > > So, please, think twice about using setters. They should be not used for > initialization / configuration! > > > > My 2 cents. > > Cheers, > > Christian > > > > > > > > Von: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] Im Auftrag von > Peter UhnÃ¡k > Gesendet: Sonntag, 11. Februar 2018 16:26 > An: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > Betreff: [Pharo-users] Object configuration idioms > > > > Hi, > > > > are there any best practices/idioms in regards to object > configuration/building? > > > > Let's say I want to configure a TwitterClient that requires a username and a > password that is stored in a separate object TwitterConfiguration > > > > a) the basic approach (either separate sends or via cascade, that is not > relevant here) > > > > client := TwitterClient new. > > client configuration username: 'XX'. > > client configuration password: 'YY'. > > > > > > b) #in: ... > > > > It feels a bit more organized as it basically groups related operations > together. > > Also maybe avoiding demeter a bit? > > > > client := TwitterClient new. > > client configuration in: [ :config | > > config username: 'XX'. > > config password: 'YY'. > > ]. > > > > c) custom #somethingDo: method that basically does #in: > > > > Again, feels more organized. Additionally one could perform some validation > afterwards (to make sure the credentials are ok or whatever). > > > > client := TwitterClient new. > > client configurationDo: [ :config | > > config username: 'XX'. > > config password: 'YY' > > ]. > > > > Any thoughts on this? > > > > Thanks, > > Peter

Feb. 14, 2018

Re: [Pharo-users] Object configuration idioms

by Stephane Ducasse

Nice design henrik. You made me think so this is good. On Sun, Feb 11, 2018 at 11:27 PM, Henrik-Nergaard <draagren(a)outlook.com> wrote: > Hi Peter, > > I would just fill in the configuration and have it give me the correct > client which uses the configuration instance. > > ========================= > | client | > > client := TwitterConfiguration new > username: 'stuff'; > password: 'password1'; > port: '1234'; > useHttps; > client. > > TwitterConfiguration >> #client > self perhapsValidateConfigurationHere. > > ^ self clientClassDependingOnConfiguration on: self > > ======================================== > > Best regards, > Henrik > > > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >

Feb. 14, 2018

Re: [Pharo-users] Web scrapping with Pharo Chrome

by Stephane Ducasse

I would love to have a little how to and that we can turn it into a document. Stef On Wed, Feb 14, 2018 at 5:25 PM, Offray Vladimir Luna CÃ¡rdenas < offray.luna(a)mutabit.com> wrote: > Hi, > > I have been finally able to install and use properly Pharo Chrome. The > issues I reported in other thread, were caused by conflicts between > OSProcess and OSSubProcess on Linux. Now I'm able to launch Chrome, point > it to particular addresses and get some info from there. > > I would like to continue the conversation related with web scraping using > Pharo Chrome, which comes handy now that there is a lot of React and other > technologies making the web more and more opaque for digital citizenship > and data activism endeavors. So, as an starting example, I would like to > scrap the Grafoscopio's own page [1]. It makes use of Material Design Light > [2]. > > [1] http://mutabit.com/grafoscopio/index.en.html > [2] http://getmdl.io/ > > An starting example would be fine to kickstart myself (from the ones I'm > reading, there is still something I don't get). Let's say I want to get all > cards in [1] , as shown in the screenshot below. I know the div class of > each one, and the div class where they are located. Which could be a > minimal example of a scraper, to start with? > > Thanks, > > Offray > >

Feb. 14, 2018

Web scrapping with Pharo Chrome

by Offray Vladimir Luna CÃ¡rdenas

Hi, I have been finally able to install and use properly Pharo Chrome. The issues I reported in other thread, were caused by conflicts between OSProcess and OSSubProcess on Linux. Now I'm able to launch Chrome, point it to particular addresses and get some info from there. I would like to continue the conversation related with web scraping using Pharo Chrome, which comes handy now that there is a lot of React and other technologies making the web more and more opaque for digital citizenship and data activism endeavors. So, as an starting example, I would like to scrap the Grafoscopio's own page [1]. It makes use of Material Design Light [2]. [1] http://mutabit.com/grafoscopio/index.en.html [2] http://getmdl.io/ An starting example would be fine to kickstart myself (from the ones I'm reading, there is still something I don't get). Let's say I want to get all cards in [1] , as shown in the screenshot below. I know the div class of each one, and the div class where they are located. Which could be a minimal example of a scraper, to start with? Thanks, Offray

Feb. 14, 2018

Re: [Pharo-users] Pillar questions

by Stephane Ducasse

You have a booklet https://github.com/SquareBracketAssociates/Booklet-PublishingAPillarBooklet it is about Pillar 70 (mainly about book publishing) all the rest is compatible with Pillar 50. Stef On Tue, Feb 13, 2018 at 6:34 PM, Arturo Zambrano <arturo.zambrano(a)gmail.com> wrote: > Hi Stef > > On Tue, Feb 13, 2018 at 2:18 PM, Stephane Ducasse <stepharo.self(a)gmail.com> > wrote: >> >> Hi arturo >> >> Pillar is based on templates so you edit the template and add more >> variables. > > > got it > >> >> In pillar 5 these variables are metadata so you should add a new one >> in the metadata declaration. >> Let me know if you need some screen sharing or some help. > > > I will play a bit and come back with more questions. > > I assume that this is the main documentation source > https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessf… > > If there is more documentation to read, please let me know. > > Thanks. > Best Regards > > > >> >> stef >> >> On Tue, Feb 13, 2018 at 4:21 PM, Arturo Zambrano >> <arturo.zambrano(a)gmail.com> wrote: >> > Hi All, >> > Q1 >> > Is there a way of adding page headers/footers in pillar? >> > header = image + short legend. >> > footer = line + section name + page number. >> > >> > Q2 >> > My plan is to use Pillar programmatically, are you aware of some >> > projects >> > that use Pillar in that way? Most of the documentation I found is >> > regarding >> > Pillar syntax. >> > The testcases are good examples, but I would like to see something more >> > complex if possible. >> > >> > Thanks! >> > Arturo >> >

Feb. 13, 2018

[ANN] Pharo Consortium New Platinum Member: ENSTA Bretagne

by Marcus Denker

The Pharo Consortium is very happy to announce that ENSTA Bretagne has joined the Consortium as a Platinum Member. About - ENSTA Bretagne: http://www.ensta-bretagne.fr - Pharo Consortium: http://consortium.pharo.org The goal of the Pharo Consortium is to allow companies and institutions to support the ongoing development and future of Pharo. Individuals can support Pharo via the Pharo Association: - http://association.pharo.org

Feb. 13, 2018

Re: [Pharo-users] Pillar questions

by Arturo Zambrano

Hi Stef On Tue, Feb 13, 2018 at 2:18 PM, Stephane Ducasse <stepharo.self(a)gmail.com> wrote: > Hi arturo > > Pillar is based on templates so you edit the template and add more > variables. > got it > In pillar 5 these variables are metadata so you should add a new one > in the metadata declaration. > Let me know if you need some screen sharing or some help. > I will play a bit and come back with more questions. I assume that this is the main documentation source https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessf… If there is more documentation to read, please let me know. Thanks. Best Regards > stef > > On Tue, Feb 13, 2018 at 4:21 PM, Arturo Zambrano > <arturo.zambrano(a)gmail.com> wrote: > > Hi All, > > Q1 > > Is there a way of adding page headers/footers in pillar? > > header = image + short legend. > > footer = line + section name + page number. > > > > Q2 > > My plan is to use Pillar programmatically, are you aware of some > projects > > that use Pillar in that way? Most of the documentation I found is > regarding > > Pillar syntax. > > The testcases are good examples, but I would like to see something more > > complex if possible. > > > > Thanks! > > Arturo > >

Feb. 13, 2018

Re: [Pharo-users] Pillar questions

by Arturo Zambrano

On Tue, Feb 13, 2018 at 12:25 PM, Guillermo Polito < guillermopolito(a)gmail.com> wrote: > Hi, > > > > On Tue, Feb 13, 2018 at 4:21 PM, Arturo Zambrano < > arturo.zambrano(a)gmail.com> wrote: > >> Hi All, >> Q1 >> Is there a way of adding page headers/footers in pillar? >> header = image + short legend. >> footer = line + section name + page number. >> > > In html generation or pdf generation? > any format, as I consider them an intermediate format.... somehow, at end I will need Word document :( > > Usually all this is handled by the latex/html templates. > great! thanks!. > >> >> Q2 >> My plan is to use Pillar programmatically, are you aware of some >> projects that use Pillar in that way? Most of the documentation I found is >> regarding Pillar syntax. >> The testcases are good examples, but I would like to see something more >> complex if possible. >> > > There is ecstatic that is a little project that uses pillar programatically > > https://github.com/guillep/ecstatic/ > > Otherwise, I'd recommend to use the latest pillar version in this branch: > > https://github.com/pillar-markup/pillar/tree/newpipeline > > Thanks again Guillermo! > >> Thanks! >> Arturo >> > > > > -- > > > > Guille Polito > > Research Engineer > > Centre de Recherche en Informatique, Signal et Automatique de Lille > > CRIStAL - UMR 9189 > > French National Center for Scientific Research - *http://www.cnrs.fr > <http://www.cnrs.fr>* > > > *Web:* *http://guillep.github.io* <http://guillep.github.io> > > *Phone: *+33 06 52 70 66 13 >

Feb. 13, 2018

Re: [Pharo-users] Pillar questions

by Stephane Ducasse

Hi arturo Pillar is based on templates so you edit the template and add more variables. In pillar 5 these variables are metadata so you should add a new one in the metadata declaration. Let me know if you need some screen sharing or some help. stef On Tue, Feb 13, 2018 at 4:21 PM, Arturo Zambrano <arturo.zambrano(a)gmail.com> wrote: > Hi All, > Q1 > Is there a way of adding page headers/footers in pillar? > header = image + short legend. > footer = line + section name + page number. > > Q2 > My plan is to use Pillar programmatically, are you aware of some projects > that use Pillar in that way? Most of the documentation I found is regarding > Pillar syntax. > The testcases are good examples, but I would like to see something more > complex if possible. > > Thanks! > Arturo

Feb. 13, 2018

Re: [Pharo-users] Pillar questions

by Guillermo Polito

Hi, On Tue, Feb 13, 2018 at 4:21 PM, Arturo Zambrano <arturo.zambrano(a)gmail.com> wrote: > Hi All, > Q1 > Is there a way of adding page headers/footers in pillar? > header = image + short legend. > footer = line + section name + page number. > In html generation or pdf generation? Usually all this is handled by the latex/html templates. > > Q2 > My plan is to use Pillar programmatically, are you aware of some > projects that use Pillar in that way? Most of the documentation I found is > regarding Pillar syntax. > The testcases are good examples, but I would like to see something more > complex if possible. > There is ecstatic that is a little project that uses pillar programatically https://github.com/guillep/ecstatic/ Otherwise, I'd recommend to use the latest pillar version in this branch: https://github.com/pillar-markup/pillar/tree/newpipeline > > Thanks! > Arturo > -- Guille Polito Research Engineer Centre de Recherche en Informatique, Signal et Automatique de Lille CRIStAL - UMR 9189 French National Center for Scientific Research - *http://www.cnrs.fr <http://www.cnrs.fr>* *Web:* *http://guillep.github.io* <http://guillep.github.io> *Phone: *+33 06 52 70 66 13

Feb. 13, 2018