December 2018 - Pharo-users

Re: [Pharo-users] Latest Pharo and Aida/Web
by eftomi Dec. 4, 2018

Dec. 4, 2018

Thanks, BenoÃ®t, it helped! However, when I visit the home page another halt happens in AIDASite>>answerTo: with exception "Error: Guest user missing?", so the digging continues â¦ Tomaz -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Re: [Pharo-users] VPS difficulties
by horrido Dec. 4, 2018

Dec. 4, 2018

Bizarre. I've created a new VirtualBox image of Debian and now this solution no longer works! I'm still getting the thread priority warning. So this solution appears to be unreliable. <sigh> On Fri, 23 Nov 2018 at 04:02, horrido <horrido.hobbies@> wrote: > Okay, I've resolved everything. First, the reason why I'm getting the > 'pthread_setschedparam failed' error when I run Pharo under Debian is > because it must be run as 'root'! Don't ask me why, but that's the reason > why Pharo can't set thread priorities. (This wasn't an issue under Ubuntu > Server â go figure.) > > Second, I am now using Pharo's own SHA256 class. It's probably not as > secure > (because it doesn't use a salt value) and not as quick to execute (not > being > C code), but for my purpose, it doesn't really matter. > > So I can use DigitalOcean or OVH to run my web server in a VPS. > Good to hear. But you shouldn't need to run Pharo as root, just be root to create this config file.... cat <<END | sudo tee /etc/security/limits.d/pharo.conf * hard rtprio 2 * soft rtprio 2 END cheers -ben </quote> -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Latest Pharo and Aida/Web
by eftomi Dec. 3, 2018

Dec. 3, 2018

Hi, I'm trying to run Aida/Web on Pharo 5.0, 6.1 and 7.0 with no luck. After package inclusion with Catalog Browser, the initialisation with SwazooAida demoStart wasn't working, since Timestamp was not present. After I "faked" it with DateAndTime, the web server is running, but if I visit the initial web address http://localhost:8888/, I get his error: WebSecurityManager class>>hashPassword: (SecureHashAlgorithm is Undeclared). Before I continue with exploration & debugging, I'd like to know how far from a working and stable team is Aida & latest Pharo (if somebody knows, of course). I'm a beginner with Smalltalk and Aida seems to be very nice framework, however there are other options as well, without any challenges for a newbie :-) Thanks, Tomaz -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Re: [Pharo-users] can I improve this
by Benoit St-Jean Dec. 3, 2018

Dec. 3, 2018

Wouldn't be that hard to implement.Â We just need a modulo (like I did) when sending #next to wrap around... Or even better: a "cyclic" iterator, something like #withWrapDo: ? ----------------- BenoÃ®t St-Jean Yahoo! Messenger: bstjean Twitter: @BenLeChialeux Pinterest: benoitstjean Instagram: Chef_Benito IRC: lamneth Blogue: endormitoire.wordpress.com "A standpoint is an intellectual horizon of radius zero".Â (A. Einstein) On Monday, December 3, 2018, 1:28:09 p.m. EST, phil--- via Pharo-users <pharo-users(a)lists.pharo.org> wrote: CyclicReadStream. Not in base Pharo. I wish. We have atWrap: but not the best. Phil On Mon, Dec 3, 2018 at 1:17 PM Richard O'Keefe <raoknz(a)gmail.com> wrote: "if I use do:Â Â this ends at the end of the array."True.Â But all that means is that you have to keen on using #do:. Processing an array repeatedly is as simple asÂ [true] whileTrue: [Â Â anArray do: [:each |Â Â Â ...]] I had intended to twist this into Â [changes anySatisfy: [:change | ...]] whileFalse. However, in this case your second alternative has much to recommend it.The control flow is simple.Â There's no magic about it.Â It's anunusual setup, so no need to get fancy. Â seen := Set new.Â frequency := 0.Â found := false.Â i := changes size.Â [found] whileFalse: [Â Â i := i = changes size ifTrue: [1] ifFalse: [i+1].Â Â frequency := frequencyÂ + (changes at: i).Â Â found := seen includes: frequency.Â Â seen add: frequency]. I like this better than what I had. If we _were_ to get fancy, then introducing a CyclicReadStreamclass and doingÂ Â seen := Set new.Â Â frequency := 0.Â Â found := false.Â Â stream := CyclicReadStream on: self changes.Â Â [found] whileFalse: [Â Â Â frequency := frequencyÂ + stream next.Â Â Â found := seen includes: frequency.Â Â Â seen add: frequency].wouldn't shrink the code much.Â Oddly enough, I've encounteredproblems in previous Advent of Code exercises where CyclicReadStreamwould have been handy.Â But just for this case?Â No. On Tue, 4 Dec 2018 at 00:25, Roelof Wobben <r.wobben(a)home.nl> wrote: hello Richard, Thanks, I figured that out already. What I do not get is how to read the array multiple times. if I use do:Â Â this ends at the end of the array. Or I must use something as this : index := 0 if index > array length Â Â Â index =:Â 1 else index := index + 1 and then read the number with array at: index Roelof Op 3-12-2018 om 10:08 schreef Richard O'Keefe: Roelof Wobben wrote "I have to reread the file till the adding causes the same outcomeÂ as we had already" You have to process the *sequence of changes* repeatedly; you DON't have to *reread the file*.Â Somebody already made this point. Having read the changes into an array, you can iterate repeatedly over that array. to find the first repeated frequency given a sequence of changes Â Â make an empty Set to hold the sums that have been seen so far. Â Â set the frequency to 0. Â Â loop forever Â Â Â Â for each change in the changes Â Â Â Â Â Â increment the frequency by the change. Â Â Â Â Â Â if the frequency is in the set Â Â Â Â Â Â Â Â return the frequency Â Â Â Â Â Â otherwise add the frequency to the set. Â partTwo: aFileName Â Â Transcript print: (self firstRepeatedFrequency: (self changesFrom: aFileName)); cr; flush. On Mon, 3 Dec 2018 at 19:31, Roelof Wobben <r.wobben(a)home.nl> wrote: Thanks, For the second I have to take a good look. I have to reread the file till the adding causes the same outcomeÂ as we had already so for example if we have the sequence : +3, +3, +4, -2, -4 it has as outcome : 3 6 10 8 4 so no outcome is there a second time so we repeat the sequence 7 10 the 10 shows up a second time so there we have our answer. Roelof Op 3-12-2018 om 03:45 schreef Richard O'Keefe: The key question is "what do you mean by improve"? I'd start by asking "what are you doing that you will still have to do in part 2, and what won't you do?"Â So looking at part 2, you will want to convert the lines to integers, and Â input := Array streamContents: [:lines | Â Â 'input.txt' asFileReference readStreamDo: [:in | Â Â Â [in atEnd] whileFalse: [lines nextPut: in nextLine asInteger]]]. gives you a chunk of code you can use in both parts.Â So you might want to have Day1 Â changesFrom: aFileName Â Â ^Array streamContents: [:changes | Â Â Â aFileName asFileReference readStreamDo: [:in | Â Â Â Â [in atEnd] whileFalse: [changes nextPut: in nextLine asInteger]]] Â partOne: aFileName Â Â ^(self changesFrom: aFileName) sum Â partTwo: aFileName Â Â ... The file name should not be wired in because you want some test files.

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can I improve this
by Roelof Wobben Dec. 3, 2018

Dec. 3, 2018

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Re: [Pharo-users] can I improve this
by Roelof Wobben Dec. 3, 2018

Dec. 3, 2018

Op 3-12-2018 om 17:01 schreef Benoit St-Jean via Pharo-users: Many many many thanks For me too and that is the answer I expect Two question, Why is trough StandardFileStream a line and can this also be rewritten with a StreamContents Roelof

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Re: [Pharo-users] can I improve this
by Roelof Wobben Dec. 3, 2018

Dec. 3, 2018

Op 3-12-2018 om 16:13 schreef Benoit St-Jean via Pharo-users: > file := StandardFileStream readOnlyFileNamed: 'C:\Recv\day.1.input'. > [file atEnd] whileFalse: [numbers add: (file nextLine asInteger)]. > file close. very wierd, on my Pharo 7 box I do not work. I also see a message that temp variables are not written or read Can you try your code on my input : https://gist.github.com/RoelofWobben/001a0d7f9a8d5b5a0ebbc3f133dbd032 and tell me the outcome. I have solved it already so you do not spoil anything Roelof

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Re: [Pharo-users] can I improve this
by Roelof Wobben Dec. 3, 2018

Dec. 3, 2018

found it. I use the old reading code from part1. but on part2 you did add the input to the numbers collection so numbers was keeping empty sorry for the noise Roelof Op 3-12-2018 om 16:13 schreef Benoit St-Jean via Pharo-users: > | file total numbers index frequencies duplicate | > > duplicate := false. > frequencies := Set new: 150000. > frequencies add: 0. > numbers := OrderedCollection new: 1000. > total := 0. > > file := StandardFileStream readOnlyFileNamed: 'C:\Recv\day.1.input'. > [file atEnd] whileFalse: [numbers add: (file nextLine asInteger)]. > file close. > > index := 0. > [duplicate] whileFalse: [index := index \\ (numbers size) + 1. > Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â total := total + numbers at: index. > Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (frequencies includes: total) > Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ifTrue: [duplicate := true] > Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ifFalse: [frequencies add: total]]. > > total

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Re: [Pharo-users] can I improve this
by Roelof Wobben Dec. 3, 2018

Dec. 3, 2018

Op 3-12-2018 om 16:08 schreef Benoit St-Jean via Pharo-users: yep I did change it by the argument partTwo: aFileName Â Â Â | total numbers index frequencies duplicate file | duplicate := false. frequencies := Set new: 150000. frequencies add: 0. numbers := OrderedCollection new: 1000. total := 0. file := self changesFrom: aFileName. index := 0. [duplicate] whileFalse: [index := index \\ (numbers size) + 1. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â total := total + numbers at: index. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (frequencies includes: total) Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ifTrue: [duplicate := true] Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ifFalse: [frequencies add: total]]. ^total and changesFrom looks like this : changesFrom: aFileName Â Â Â ^Array streamContents: [:changes | Â Â Â Â Â aFileName asFileReference readStreamDo: [:in | Â Â Â Â Â Â Â [in atEnd] whileFalse: [changes nextPut: in nextLine asInteger]]]

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Re: [Pharo-users] can I improve this
by Roelof Wobben Dec. 3, 2018

Dec. 3, 2018

Op 3-12-2018 om 15:30 schreef Benoit St-Jean via Pharo-users: Thanks, But at first glance you do not use the contents of file anywhere or am I mistaken. When I try your code on the real input I see a divide by zero error message. Roelof

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