- Pharo-dev - lists.pharo.org

Re: [Pharo-dev] the fastest way to load external code

by Tudor Girba

Hi, Interesting. How do I do that? Doru > On May 22, 2016, at 9:49 AM, Max Leske <maxleske(a)gmail.com> wrote: > > Another thing you can do (but be careful) is to close the changes file. Sources (and change operations) will then not be written to disk which saves a lot of I/O operations. I use this for some special imports. Iâm not sure however, how well that will work in Pharo 5 (Iâve been doing this in Pharo 1.3). > > Cheers, > Max > >> On 21 May 2016, at 23:51, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: >> >> Hi Doru, >> >>> On May 21, 2016, at 12:50 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: >>> >>> Hi, >>> >>> I am looking for ways to make loading of code from an st file faster. To this end, I would like to find in-image mechanisms that are not mandatory for obtaining a functional image. >>> >>> For example, one place I look at is SystemAnnouncer uniqueInstance, and I know that I should have no Nautilus open and that I can disable Renraku and GTExample: >>> >>> ReRuleManager uniqueInstance unsubscribe. >>> GTExampleOrganizer instance stopSystemAnnouncements. >>> >>> What else do you see around? >> >> Strikes me that parsing, not compiling and either holding onto the source String or simply keeping a pointer into the source file makes sense. Compilation to methods can wait until installation. With that approach you need no notifications at all. HTH >> >> >> _,,,^..^,,,_ (phone) >> >>> >>> Cheers, >>> Doru >>> >>> >>> -- >>> www.tudorgirba.com >>> www.feenk.com >>> >>> "Don't give to get. Just give." >>> >>> >>> >>> >>> >>> >>> >> > > -- www.tudorgirba.com www.feenk.com "Speaking louder won't make the point worthier."

May 22, 2016

Re: [Pharo-dev] the fastest way to load external code

by Max Leske

Another thing you can do (but be careful) is to close the changes file. Sources (and change operations) will then not be written to disk which saves a lot of I/O operations. I use this for some special imports. Iâm not sure however, how well that will work in Pharo 5 (Iâve been doing this in Pharo 1.3). Cheers, Max > On 21 May 2016, at 23:51, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > > Hi Doru, > >> On May 21, 2016, at 12:50 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: >> >> Hi, >> >> I am looking for ways to make loading of code from an st file faster. To this end, I would like to find in-image mechanisms that are not mandatory for obtaining a functional image. >> >> For example, one place I look at is SystemAnnouncer uniqueInstance, and I know that I should have no Nautilus open and that I can disable Renraku and GTExample: >> >> ReRuleManager uniqueInstance unsubscribe. >> GTExampleOrganizer instance stopSystemAnnouncements. >> >> What else do you see around? > > Strikes me that parsing, not compiling and either holding onto the source String or simply keeping a pointer into the source file makes sense. Compilation to methods can wait until installation. With that approach you need no notifications at all. HTH > > > _,,,^..^,,,_ (phone) > >> >> Cheers, >> Doru >> >> >> -- >> www.tudorgirba.com >> www.feenk.com >> >> "Don't give to get. Just give." >> >> >> >> >> >> >> >

May 22, 2016

Re: [Pharo-dev] [Cryptography Team] Re: Random is not random at startup

by Luciano Notarfrancesco

(Hey Rob, long time no Smalltalk!) I suggest some changes we did in Cuis. First, for Park-Miller you can do a small change to #initialize, insert a hashMultiply somewhere when initializing the seed. I did experiments in Cuis, drawing histograms to see if it looks like a uniform distribution, and ended up doing something like seed _ (Time millisecondClockValue + self identityHash) hashMultiply \\ m Another issue with Random that we addressed in Cuis is related to the bit size of each output. Random>>nextValue returns Floats with 31 random bits (or 30). It doesn't return a uniformly distributed Float between 0 and 1 (some Float values don't have a chance to be output). Similarly, Random>>nextInt: n will not really return an integer between 1 and n if n is large enough, for example (1 << 64) atRandom returns always odd integers (not very random uh). So I suggest to think of Random as a generator of random "bits" or "blocks of bits", and to generate a Float it should actually build it from 52 randomly generated bits (to fill out the mantissa), and nextInt: n should also be implemented from random bits (or chunks of bits). On Wed, May 18, 2016 at 11:25 PM, Robert Withers <robert.w.withers(a)gmail.com > wrote: > Thanks for cc-ing me. I don't have much exposure to random, so I am cc-ing > the Cryptography list, in hopes they might help. This doesn't very random, > you're right. Here were Peter's questions: > > My questions: > 1) do we really want to have global fixed seed? > 2) Random new should actually setup a usable seed so I don't need to first > run it N times before I can use the value > 3) Should we switch to what UUIDGenerator is usingâ¦ reading /dev/urandom > for the initial seed setup? > > Rob > > > On 05/18/2016 07:05 PM, Peter UhnÃ¡k wrote: > > Hi, > > (cc-ing Robert Withers as he seems to be working with cryptography and > security... as this seems related and may have some implications, but I am > likely wrong about the implications) > > yesterday I've encountered a very surprising behavior > > I executed the same script `10 atRandom` on the same image without saving > it and got the same output: > > while true; do > pharo-vm --nodisplay latest.image --no-default-preferences eval > '10 atRandom' > done > 10 > 10 > 10 > 10 > 10 > 10 > > Not so randomâ¦ not random at all. > > Apparently the default random generator uses SharedRandom pool, that is > initialized only onceâ¦ so every time you start an image you get the EXACT > same random seed... I think this is stupid, and I am not sure what are the > security implications of this (e.g. when opening an SSL connectionâ¦ having > fixed world-wide initial seed seems like an awful, awful idea), but > whateverâ¦ > > So instead I tried to explicitly specify the Random generatorâ¦ which I can > do > > while true; do > pharo-vm --nodisplay latest.image --no-default-preferences eval > '10 atRandom: Random new' > done > 5 > 5 > 5 > 5 > 5 > > Still not randomâ¦ what? > > while true; do > pharo-vm --nodisplay latest.image --no-default-preferences eval > 'Random new instVarNamed: #seed' > done > 426306047 > 426305545 > 426305546 > 426306010 > > So the seed is different but thanks to the magic of masking the seed, I > always get the same first several bitsâ¦ thus the same result for small > numbers. > > So if I actually want what seems like a random valueâ¦ I have to at least > once run the generatorâ¦ > > while true; do > pharo-vm --nodisplay latest.image --no-default-preferences eval > '10 atRandom: (Random new next; yourself)' > done > 7 > 3 > 4 > 9 > 6 > 7 > > Once I start to use it the properties of the algo kick in so it's > pseudo-randomâ¦ but I need to run it once to initialize it, which is wtf. > > My questions: > 1) do we really want to have global fixed seed? > 2) Random new should actually setup a usable seed so I don't need to first > run it N times before I can use the value > 3) Should we switch to what UUIDGenerator is usingâ¦ reading /dev/urandom > for the initial seed setup? > > Peter > > > > _______________________________________________ > Cryptography mailing list > Cryptography(a)lists.squeakfoundation.org > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/cryptography > >

May 21, 2016

Re: [Pharo-dev] TEXT drag and drop

by Thierry Goubier

Le 21/05/2016 22:47, stepharo a Ã©crit : > > > Le 21/5/16 Ã 16:02, Thierry Goubier a Ã©crit : >> Le 21/05/2016 15:58, stepharo a Ã©crit : >>> How can I see the effects of your changes? >> >> Install both packages that are in that smalltalkhub archive, > > I did that even before asking. > >> and try dragging a text selection. > > I have no idea how to do this. Select some text, click and hold on it and then move. Unless you tried that already, then it becomes strange because it works when I do that :) Thierry >> At least, that process works for PluggableTextMorph. >> >> Nice demonstration of both the drag and drop api and the text api, >> because it's even nicely undoable in the editor :) >> >> Thierry >> >>> >>> Stef >>> >>> >>> Le 18/5/16 Ã 19:09, lb a Ã©crit : >>>> Hi, >>>> I have made a little tool for draging and dropping text selection. >>>> like windows Word. >>>> It can work in Pharo 40 50 and 60. >>>> >>>> Have a fun! >>>> >>>> LiangBing >>>> >>>> MCHttpRepository >>>> location: >>>> 'http://www.smalltalkhub.com/mc/liangbing/Text-DragDrop/main' >>>> user: '' >>>> password: '' >>>> >>>> >>>> >>> >> >> >> > > >

May 21, 2016

Re: [Pharo-dev] the fastest way to load external code

by Eliot Miranda

Hi Doru, > On May 21, 2016, at 12:50 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > > Hi, > > I am looking for ways to make loading of code from an st file faster. To this end, I would like to find in-image mechanisms that are not mandatory for obtaining a functional image. > > For example, one place I look at is SystemAnnouncer uniqueInstance, and I know that I should have no Nautilus open and that I can disable Renraku and GTExample: > > ReRuleManager uniqueInstance unsubscribe. > GTExampleOrganizer instance stopSystemAnnouncements. > > What else do you see around? Strikes me that parsing, not compiling and either holding onto the source String or simply keeping a pointer into the source file makes sense. Compilation to methods can wait until installation. With that approach you need no notifications at all. HTH _,,,^..^,,,_ (phone) > > Cheers, > Doru > > > -- > www.tudorgirba.com > www.feenk.com > > "Don't give to get. Just give." > > > > > > >

May 21, 2016

Re: [Pharo-dev] how to swallow a syntax error?

by Tudor Girba

Hi, Thanks! I tried before with catching Error, but of course SyntaxErrorNotification is a Notification :). This means I am tired and I should go to sleep. Thanks again for unlocking me. Cheers, Doru > On May 21, 2016, at 11:30 PM, Henrik Nergaard <henrik.nergaard(a)uia.no> wrote: > > Catching the Notification stops it from popping up the syntaxErrorDebugger. > > 'AAA.st' asFileReference readStreamDo: [ :s | > importer := CodeImporter fileStream: s. > > [ importer evaluateDeclarations ] on: SyntaxErrorNotification do: [ :e | â¦] > > ]. > > From: Pharo-dev [mailto:pharo-dev-bounces@lists.pharo.org] On Behalf Of Tudor Girba > Sent: Saturday, May 21, 2016 11:25 PM > To: Pharo Development List <pharo-dev(a)lists.pharo.org> > Subject: [Pharo-dev] how to swallow a syntax error? > > Hi, > > I am having trouble making the compiler not be interactive when it encounters a syntax error. > > To reproduce the problem I attach here an .st file that has a funny character in the method name. If I file this in, like: > âAAA.stâ asFileReference fileIn. > > I get a Syntax Error dialog. I would like to avoid that. > > After diving in, I noticed that I can tell the requestor of the CodeImporter to not be interactive, but that does not seem to have an effect: > 'AAA.st' asFileReference readStreamDo: [ :s | > importer := CodeImporter fileStream: s. > importer requestor interactive: false. > importer evaluateDeclarations ] > > I also tried to play on the end of the SyntaxErrorDebugger, and replace it with something that logs the exception, but I was not successful because that one is expected to return a string that can be compiled. > > Can anyone point me in the right direction? > > Cheers, > Doru > > -- > www.tudorgirba.com > www.feenk.com > > "Every now and then stop and ask yourself if the war you're fighting is the right one." > -- www.tudorgirba.com www.feenk.com "Don't give to get. Just give."

May 21, 2016

Re: [Pharo-dev] how to swallow a syntax error?

by Henrik Nergaard

Catching the Notification stops it from popping up the syntaxErrorDebugger. 'AAA.st' asFileReference readStreamDo: [ :s | importer := CodeImporter fileStream: s. [ importer evaluateDeclarations ] on: SyntaxErrorNotification do: [ :e | â¦] ]. From: Pharo-dev [mailto:pharo-dev-bounces@lists.pharo.org] On Behalf Of Tudor Girba Sent: Saturday, May 21, 2016 11:25 PM To: Pharo Development List <pharo-dev(a)lists.pharo.org> Subject: [Pharo-dev] how to swallow a syntax error? Hi, I am having trouble making the compiler not be interactive when it encounters a syntax error. To reproduce the problem I attach here an .st file that has a funny character in the method name. If I file this in, like: âAAA.st<http://aaa.st>â asFileReference fileIn. I get a Syntax Error dialog. I would like to avoid that. After diving in, I noticed that I can tell the requestor of the CodeImporter to not be interactive, but that does not seem to have an effect: 'AAA.st<http://aaa.st>' asFileReference readStreamDo: [ :s | importer := CodeImporter fileStream: s. importer requestor interactive: false. importer evaluateDeclarations ] I also tried to play on the end of the SyntaxErrorDebugger, and replace it with something that logs the exception, but I was not successful because that one is expected to return a string that can be compiled. Can anyone point me in the right direction? Cheers, Doru -- www.tudorgirba.com<http://www.tudorgirba.com> www.feenk.com<http://www.feenk.com> "Every now and then stop and ask yourself if the war you're fighting is the right one."

May 21, 2016

how to swallow a syntax error?

by Tudor Girba

Hi, I am having trouble making the compiler not be interactive when it encounters a syntax error. To reproduce the problem I attach here an .st file that has a funny character in the method name. If I file this in, like: âAAA.stâ asFileReference fileIn. I get a Syntax Error dialog. I would like to avoid that. After diving in, I noticed that I can tell the requestor of the CodeImporter to not be interactive, but that does not seem to have an effect: 'AAA.st' asFileReference readStreamDo: [ :s | importer := CodeImporter fileStream: s. importer requestor interactive: false. importer evaluateDeclarations ] I also tried to play on the end of the SyntaxErrorDebugger, and replace it with something that logs the exception, but I was not successful because that one is expected to return a string that can be compiled. Can anyone point me in the right direction? Cheers, Doru -- www.tudorgirba.com www.feenk.com "Every now and then stop and ask yourself if the war you're fighting is the right one."

May 21, 2016

Re: [Pharo-dev] the fastest way to load external code

by Tudor Girba

Hi, > On May 21, 2016, at 10:47 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > > For example, one place I look at is SystemAnnouncer uniqueInstance, and I know that I should have no Nautilus open and that I can disable Renraku and GTExample: > > You can just do this and not worry about subscribers > > SystemAnnouncer uniqueInstance suspendAllWhile: Indeed. The problem with this is that RPackage will get out of sync. > (I was trying to speed up code generation so I did some benchmarks last year http://forum.world.st/fast-subclassing-class-creation-in-tests-tp4857779p48… ) Thanks for the pointer. > Also couple weeks back I found out that adding instance variable to a class is extremely slow and it's best to add them during the initial setup, but maybe that isn't a problem here. Indeed, I noticed that, too. Cheers, Doru > Peter > > > On Sat, May 21, 2016 at 9:50 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > Hi, > > I am looking for ways to make loading of code from an st file faster. To this end, I would like to find in-image mechanisms that are not mandatory for obtaining a functional image. > > For example, one place I look at is SystemAnnouncer uniqueInstance, and I know that I should have no Nautilus open and that I can disable Renraku and GTExample: > > ReRuleManager uniqueInstance unsubscribe. > GTExampleOrganizer instance stopSystemAnnouncements. > > What else do you see around? > > Cheers, > Doru > > > -- > www.tudorgirba.com > www.feenk.com > > "Don't give to get. Just give." > > > > > > > > -- www.tudorgirba.com www.feenk.com "It's not what we do that matters most, it's how we do it."

May 21, 2016

Re: [Pharo-dev] Random is not random at startup

by stepharo

I checked and CMWC Marsaglia is part of polymath PMNumberGenerator allSubclasses an OrderedCollection(PMBernoulliGenerator PMBinomialGenerator PMConstantGenerator PMExponentialGenerator PMGaussianGenerator PMPoissonGenerator) PMRandomGenerator allSubclasses an OrderedCollection(PMMarsagliaKissRandom PMLehmerRandomGenerator PMLinearCongruentialRandomGenerator PMMersenneTwisterRandomGenerator PMParkMillerMinimumRandomGenerator) So we could pick one of them for Pharo. Stef

May 21, 2016