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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

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 >> >> >> >

Jan. 4, 2020

Re: [Pharo-users] why is my css not found in a seaside project

by Roelof Wobben

So, if I understand the seaside book well , I have to add this to the painting class : initialize Â | app | Â Â Â Â app := WAAdmin register: YourWAComponent asApplicationAt: 'my-app'. Â Â Â Â 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 ? >> >> Â Â Â Â | app | >> Â Â Â Â app := WAAdmin register: YourWAComponent asApplicationAt: 'my-app'. >> Â Â Â Â 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 : >>>>> Â updateRoot: anHtmlRoot >>>>> Â Â Â Â super updateRoot: anHtmlRoot. >>>>> Â Â Â Â anHtmlRoot stylesheet url: self class / #mainCss. >>>>> Â Â Â Â 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 >>>>> >>>>> >>>>> >>> >>> >>> >> >

Jan. 4, 2020

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

Re: [Pharo-users] can I make this so the vm would not be not responsibe when running the tests

by 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 > > >

Jan. 4, 2020

Re: [Pharo-users] can I make this so the vm would not be not responsibe when running the tests

by Joachim Tuchel

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>

Jan. 4, 2020

can I make this so the vm would not be not responsibe when running the tests

by Roelof Wobben

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

Jan. 4, 2020

Re: [Pharo-users] why is my css not found in a seaside project

by 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 >>>> >>>> >>>> >> >> >> >

Jan. 4, 2020

Re: [Pharo-users] why is my css not found in a seaside project

by 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 >>> >>> >>> >> > > > >

Jan. 4, 2020

Re: [Pharo-users] why is my css not found in a seaside project

by Roelof Wobben

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 >> >> >> >

Jan. 4, 2020

Re: [Pharo-users] why is my css not found in a seaside project

by 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 > > >

Jan. 4, 2020