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[seaside] how can I now make the best work to display all the paiintings which are in the paintings collection
by Roelof Wobben Jan. 5, 2020

Jan. 5, 2020

Hello, Im a little bit further on my first project but now I fail to see how I can use the ListComponent to display all the paintings that are in the paintings collection on the Paintings class. Anyone who can give me hints on this ? Roelof

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Re: [Pharo-users] is this better regarding naming thigs
by Sven Van Caekenberghe Jan. 5, 2020

Jan. 5, 2020

> On 5 Jan 2020, at 15:06, Roelof Wobben via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Roelof Wobben <r.wobben(a)home.nl> > Subject: is this better regarding naming thigs > Date: 5 January 2020 at 15:06:18 GMT+1 > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > Hello > > In a earlier question I get a remark to think better about naming things. > Now I did a challene where I have to find anagrams of a given word in a collection, > > So I did this : > > findAnagramsCandidates: aCollection subject: aWord > | charBag | > charBag := aWord asLowercase asBag. > ^ aCollection > reject: > [ :word | (word sameAs: aWord) or: [ word asLowercase asBag ~= charBag ] ] > > > is my naming here better or can i improved and if so how ? It is good. Possible alternatives: aCollectionOfWords instead of aCollection, I would even dare to use words/wordsCollection and word, since I am not a big fan of the 'a' and 'an' prefixes. Also the argument to the reject block is often called each or eachWord, but this is more of a tradition, word is OK too (but it would then conflict with naming the argument word). > Regards, > > Roelof > > > >

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Re: [Pharo-users] why is my css not found in a seaside project
by Sven Van Caekenberghe Jan. 5, 2020

Jan. 5, 2020

> On 5 Jan 2020, at 14:46, Roelof Wobben via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Roelof Wobben <r.wobben(a)home.nl> > Subject: Re: [Pharo-users] why is my css not found in a seaside project > Date: 5 January 2020 at 14:46:24 GMT+1 > To: pharo-users(a)lists.pharo.org > > > I think I found the answer myself > > when I put this in the RootComponent > > updateRoot: anHtmlRoot > super updateRoot: anHtmlRoot. > anHtmlRoot stylesheet url: (PaintingLibrary urlOf: #mainCss) > > and this on the class side of the RootComponent > > > initialize > | app | > app := WAAdmin > register: #stRootComponent > asApplicationAt: 'Paintings2'. > app addLibrary: PaintingLibrary > > > then I see some css. The page looks not what I expect but that can be changed. > > So does the code I have now on my github page well or do I use the components still the wrong way ? What you write above is correct, it is what I meant. Good that you figured it out ! > Roelof > > > > Op 5-1-2020 om 12:48 schreef Roelof Wobben: >> Op 5-1-2020 om 11:36 schreef Roelof Wobben via Pharo-users: >> >> hmm, >> >> It looks like I had to do it like this : https://github.com/RoelofWobben/paintings >> for registering the project but I see then that the rootcomponent is not changed and that still the css is not found or used. >> >> >> So please help. >> >> Roelof >> > > > >

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is this better regarding naming thigs
by Roelof Wobben Jan. 5, 2020

Jan. 5, 2020

Hello In a earlier question I get a remark to think better about naming things. Now I didÂ a challene where I have to find anagrams of a given word in a collection, So I did this : findAnagramsCandidates: aCollection subject: aWord Â Â Â | charBag | Â Â Â charBag := aWord asLowercase asBag. Â Â Â ^ aCollection Â Â Â Â Â Â reject: Â Â Â Â Â Â Â Â Â [ :word | (word sameAs: aWord) or: [ word asLowercase asBag ~= charBag ] ] is my naming here better or can i improved and if so how ? Regards, Roelof

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Re: [Pharo-users] why is my css not found in a seaside project
by Roelof Wobben Jan. 5, 2020

Jan. 5, 2020

Op 5-1-2020 om 11:36 schreef Roelof Wobben via Pharo-users: hmm, It looks like I had to do it like this : https://github.com/RoelofWobben/paintings for registering the project but I see then that the rootcomponent is not changed and that still the css is not found or used. So please help. Roelof

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Re: [Pharo-users] why is my css not found in a seaside project
by Sven Van Caekenberghe Jan. 5, 2020

Jan. 5, 2020

Yes, you typically put that code in a class side method, like #register. Then you can call #register from your class' #initialize if you want. The advantage is that your registration process is now written out programmatically, instead of being a UI procedure, so it is more repeatable, shareable, etc. > On 4 Jan 2020, at 19:42, Roelof Wobben via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > > From: Roelof Wobben <r.wobben(a)home.nl> > Subject: Re: [Pharo-users] why is my css not found in a seaside project > Date: 4 January 2020 at 19:42:44 GMT+1 > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > So, if I understand the seaside book well , I have to add this to the painting class : > > > initialize > | app | > app := WAAdmin register: YourWAComponent asApplicationAt: 'my-app'. > app addLibrary: YourLibrary; > > > or must I use another class and if so, which class. > > Roelof > > > > Op 4-1-2020 om 13:32 schreef Roelof Wobben: >> Yes, I added it by using localhost:8080/config and then choose for the application. >> >> In the tutorial Im following that was the way the application is registered and the library. >> >> So where should I add the code you are saying to use. >> >> Here is the code I have so far: https://github.com/RoelofWobben/paintings >> >> Roelof >> >> >> >> >> Op 4-1-2020 om 12:58 schreef Sven Van Caekenberghe: >>> Did you add your library to your application ? >>> >>> | app | >>> app := WAAdmin register: YourWAComponent asApplicationAt: 'my-app'. >>> app addLibrary: YourLibrary; >>> >>>> On 4 Jan 2020, at 11:58, Roelof Wobben via Pharo-users <pharo-users(a)lists.pharo.org> wrote: >>>> >>>> >>>> From: Roelof Wobben <r.wobben(a)home.nl> >>>> Subject: Re: [Pharo-users] why is my css not found in a seaside project >>>> Date: 4 January 2020 at 11:58:46 GMT+1 >>>> To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> >>>> >>>> >>>> Yes. it is callled >>>> >>>> Roelof >>>> >>>> >>>> Op 4-1-2020 om 11:48 schreef Sven Van Caekenberghe: >>>>> Try putting a breakpoint inside the #updateRoot: of your library class. Is it even called ? >>>>> >>>>>> On 4 Jan 2020, at 11:17, Roelof Wobben via Pharo-users <pharo-users(a)lists.pharo.org> wrote: >>>>>> >>>>>> >>>>>> From: Roelof Wobben <r.wobben(a)home.nl> >>>>>> Subject: why is my css not found in a seaside project >>>>>> Date: 4 January 2020 at 11:17:13 GMT+1 >>>>>> To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> >>>>>> >>>>>> >>>>>> Hello, >>>>>> >>>>>> I have this in my library class on the instance side : >>>>>> updateRoot: anHtmlRoot >>>>>> super updateRoot: anHtmlRoot. >>>>>> anHtmlRoot stylesheet url: self class / #mainCss. >>>>>> anHtmlRoot javascript url: self class / #mainJs >>>>>> >>>>>> and a file mainCss on the instance side filled with css >>>>>> and still the css is not found >>>>>> >>>>>> anyone idea why ? >>>>>> >>>>>> if needed I can put my whole code on github. >>>>>> >>>>>> >>>>>> Regards, >>>>>> >>>>>> Roelof >>>>>> >>>>>> >>>>>> >>>> >>>> >>>> >>> >> > > > >

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Re: [Pharo-users] can I make this so the vm would not be not responsibe when running the tests
by Sean P. DeNigris Jan. 5, 2020

Jan. 5, 2020

Pharo Smalltalk Users mailing list wrote > im still not happy with my answer at this moment. Contrary to the delusion of "Learn [Programming Language] in 21 Days" or 7 minutes or 3 seconds or whatever the "code boot camps" are marketing these days, mastering any language (and by extension programming in general) probably will take a decade and countless hours. I wouldn't get hung up on making this one exercise perfect. If it accomplishes the task, move on to the next learning experiment. Everyone is trying to help, but you don't have to assimilate this entire pile of great advice in one day! Come back to this thread after a year of practice and you'll likely be shocked how much more sense these comments make :) ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Re: [Pharo-users] why is my css not found in a seaside project
by Richard Sargent Jan. 4, 2020

Jan. 4, 2020

On Sat, Jan 4, 2020 at 2:17 AM Roelof Wobben via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > Hello, > > I have this in my library class on the instance side : > > > updateRoot: anHtmlRoot > super updateRoot: anHtmlRoot. > anHtmlRoot stylesheet url: self class / #mainCss. > anHtmlRoot javascript url: self class / #mainJs > > and a file mainCss on the instance side filled with css > and still the css is not found > I'm not familiar with Seaside programming and especially not CSS. However, I have to wonder whether "url: self class / #mainCss" makes it look for a class method rather than an instance method. > anyone idea why ? > > if needed I can put my whole code on github. > > > Regards, > > Roelof > >

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Re: [Pharo-users] can I make this so the vm would not be not responsibe when running the tests
by Roelof Wobben Jan. 4, 2020

Jan. 4, 2020

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Re: [Pharo-users] can I make this so the vm would not be not responsibe when running the tests
by Richard Sargent Jan. 4, 2020

Jan. 4, 2020

On Sat, Jan 4, 2020 at 10:37 AM Roelof Wobben via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > Oke, > > So I can better not use recursion for this problem if I understand you > well, Richard. > That is oversimplifying. If the purpose of the *training* *exercise* is to learn how to use recursion, then using recursion is a necessary thing. If the purpose of the exercise is to solve a problem, understanding whether there are more efficient approaches to the solution is an essential skill. This particular problem could have been solved using a recursive implementation, an iterative implementation, or a fundamental reframing of the problem to change it to an O(1) problem. Other problems are no so simply reframed. One of the most important skills you will ever develop is to understand that a request for a feature may not be accurately describing the problem. A feature request is often a description of a problem from a single perspective. Learning to recognize whether it is one or the other will be crucial to your long-term success as a programmer. > Roelof > > > > Op 4-1-2020 om 19:02 schreef Richard Sargent: > > On Sat, Jan 4, 2020 at 9:47 AM Roelof Wobben via Pharo-users < > pharo-users(a)lists.pharo.org> wrote: > >> Hello, >> >> For a exercism challenge I need to calculate the total grains on a >> chessboard. >> So I did : >> >> atSquare: anInteger >> self validateInput: anInteger. >> ^ anInteger = 1 >> ifTrue: [ 1 ] >> ifFalse: [ 2 * (self atSquare: anInteger - 1) ] >> >> >> but when I run the tests , the vm seems to be not responsive for some 4 >> - 5 seconds. >> >> Is there a way I can use this code and take care that the vm stays >> responsive. >> > > What do you want the VM to do in addition to calculating that sum while it > is calculating that sum? > > > The best way to keep the VM responsive is to take a page from Gauss' > notebook and pay attention to the numbers[1]. Let's consider the first four > squares and extrapolate from there. > > In binary, the squares hold the following grains: 2r1, 2r10, r2100, and > 2r1000. When we add them up, we get 2r1111. If we use Gauss' tricks, we can > notice that 2r1111 is equal to 2r10000 - 1. So, the sum of the grains on > the first 4 squares is 2^5 - 1. You can easily generalize that pattern, of > course. Then your program can calculate the answer quickly. > > > [1] The story goes that Gauss' teacher was frustrated with his student's > abilities and set him a challenge to occupy him for some time: sum the > numbers from 1 through 100. Gauss immediately answered 5,050, much to his > teacher's chagrin. > > >> Regards, >> >> Roelof >> >> >> >

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