January 2020 - Pharo-users - lists.pharo.org

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

Jan. 4, 2020

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 Richard Sargent Jan. 4, 2020

Jan. 4, 2020

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

Jan. 4, 2020

You can wrap the whole thing in a block and execute it in the background. Look for uses of fork: or forkAt: Joachim > Am 04.01.2020 um 18:46 schrieb Roelof Wobben via Pharo-users <pharo-users(a)lists.pharo.org>: > > <mime-attachment>

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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

Hello, For a exercism challenge I need to calculate the total grains on a chessboard. So I did : atSquare: anInteger Â Â Â self validateInput: anInteger. Â Â Â ^ anInteger = 1 Â Â Â Â Â Â ifTrue: [ 1 ] Â Â Â Â Â Â 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. Regards, Roelof

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

Jan. 4, 2020

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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