November 2014 - Pharo-users

Re: [Pharo-users] Anyone having a Rserve client?

by phil＠highoctane.be

Nice to know. I'll give it a shot on my Ubuntu 14.04 in the evening. As I may have more than one image connecting to the R, I will still need something with RServe at one point I guess. Phil On Wed, Nov 12, 2014 at 1:16 PM, Blondeau Vincent < vincent.blondeau(a)worldline.com> wrote: > Hi, > > Last two weeks, I began to write a binding with nativeboost to call the R > functions. > > It is a proof of concept for now : > http://www.smalltalkhub.com/#!/~VincentBlondeau/RProjectConnector > if you want to participate, just ask me! > > You have to download the right libraries to do it work. It is the .dll in > the same folder of the R.exe executable. I think that it is the same for > Linux and MacOS. > And copy them it in the same folder that the pharo executable. > > I think that nativeboost binding will be faster than RServer and more easy > to use that why I started this. > > Cheers, > Vincent > > > > > -----Message d'origine----- > > De : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] De la > part de > > stepharo > > EnvoyÃ© : lundi 10 novembre 2014 11:14 > > Ã : Any question about pharo is welcome > > Objet : Re: [Pharo-users] Anyone having a Rserve client? > > > > I know that vincent did a binding to connect to R. > > On 10/11/14 10:28, phil(a)highoctane.be wrote: > > > I am doing some R work and wanted to integrate with Pharo. > > > > > > Is there any support for Rserve around? > > > > > > http://www.rforge.net/Rserve/dev.html > > > > > > At this point I am doing OProcess style stuff with littler but Rserve > > > would be cooler. > > > > > > There are binding for Ruby and Python. > > > > > > e.g. > > > http://pythonhosted.org//pyRserve/ > > > https://github.com/ralhei/pyRserve > > > > > > Stats are becoming bigger and bigger and the leader of the pack is R. > > > > > > DHB is fine and I do use some of it but let's face it, it is nowhere > > > near the power of R... > > > > > > > > > Phil > > > > > > Ce message et les piÃ¨ces jointes sont confidentiels et rÃ©servÃ©s Ã l'usage > exclusif de ses destinataires. Il peut Ã©galement Ãªtre protÃ©gÃ© par le secret > professionnel. Si vous recevez ce message par erreur, merci d'en avertir > immÃ©diatement l'expÃ©diteur et de le dÃ©truire. L'intÃ©gritÃ© du message ne > pouvant Ãªtre assurÃ©e sur Internet, la responsabilitÃ© de Worldline ne pourra > Ãªtre recherchÃ©e quant au contenu de ce message. Bien que les meilleurs > efforts soient faits pour maintenir cette transmission exempte de tout > virus, l'expÃ©diteur ne donne aucune garantie Ã cet Ã©gard et sa > responsabilitÃ© ne saurait Ãªtre recherchÃ©e pour tout dommage rÃ©sultant d'un > virus transmis. > > This e-mail and the documents attached are confidential and intended > solely for the addressee; it may also be privileged. If you receive this > e-mail in error, please notify the sender immediately and destroy it. As > its integrity cannot be secured on the Internet, the Worldline liability > cannot be triggered for the message content. Although the sender endeavours > to maintain a computer virus-free network, the sender does not warrant that > this transmission is virus-free and will not be liable for any damages > resulting from any virus transmitted. >

Nov. 12, 2014

Re: [Pharo-users] Anyone having a Rserve client?

by Blondeau Vincent

Hi, Last two weeks, I began to write a binding with nativeboost to call the R functions. It is a proof of concept for now : http://www.smalltalkhub.com/#!/~VincentBlondeau/RProjectConnector if you want to participate, just ask me! You have to download the right libraries to do it work. It is the .dll in the same folder of the R.exe executable. I think that it is the same for Linux and MacOS. And copy them it in the same folder that the pharo executable. I think that nativeboost binding will be faster than RServer and more easy to use that why I started this. Cheers, Vincent > -----Message d'origine----- > De : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] De la part de > stepharo > EnvoyÃ© : lundi 10 novembre 2014 11:14 > Ã : Any question about pharo is welcome > Objet : Re: [Pharo-users] Anyone having a Rserve client? > > I know that vincent did a binding to connect to R. > On 10/11/14 10:28, phil(a)highoctane.be wrote: > > I am doing some R work and wanted to integrate with Pharo. > > > > Is there any support for Rserve around? > > > > http://www.rforge.net/Rserve/dev.html > > > > At this point I am doing OProcess style stuff with littler but Rserve > > would be cooler. > > > > There are binding for Ruby and Python. > > > > e.g. > > http://pythonhosted.org//pyRserve/ > > https://github.com/ralhei/pyRserve > > > > Stats are becoming bigger and bigger and the leader of the pack is R. > > > > DHB is fine and I do use some of it but let's face it, it is nowhere > > near the power of R... > > > > > > Phil > Ce message et les piÃ¨ces jointes sont confidentiels et rÃ©servÃ©s Ã l'usage exclusif de ses destinataires. Il peut Ã©galement Ãªtre protÃ©gÃ© par le secret professionnel. Si vous recevez ce message par erreur, merci d'en avertir immÃ©diatement l'expÃ©diteur et de le dÃ©truire. L'intÃ©gritÃ© du message ne pouvant Ãªtre assurÃ©e sur Internet, la responsabilitÃ© de Worldline ne pourra Ãªtre recherchÃ©e quant au contenu de ce message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission exempte de tout virus, l'expÃ©diteur ne donne aucune garantie Ã cet Ã©gard et sa responsabilitÃ© ne saurait Ãªtre recherchÃ©e pour tout dommage rÃ©sultant d'un virus transmis. This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Worldline liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted.

Nov. 12, 2014

Re: [Pharo-users] Memoization Question

by Sven Van Caekenberghe

Hi Phil, > On 12 Nov 2014, at 12:54, phil(a)highoctane.be wrote: > > Looking at LRUCache tests, I've found this: > > testFibonacci > "After an idea by Jan Vrany. > Recursively enter the cache and its access protection" > > | fibCache | > fibCache := self newCache. > fibCache > maximumWeight: 32; > beThreadSafe; > factory: [ :key | > key < 2 > ifTrue: [ key ] > ifFalse: [ (fibCache at: key - 1) + (fibCache at: key - 2) ] ]. > self assert: (fibCache at: 40) equals: 102334155 > > the factory thing basically solves the problem. Good ;-) > Is there more docs about the caching somewhere? I read the code, comments, and unit tests but still, will value an explanation. I tried to comment everything, the class comments (check AbstractCache too) are quite extensive. What else do you want to know ? > Keying by object works, but with symbols, it isn't behaving. I think I miss something here. I don't understand, AFAIK you can use any object as both key and value, most tests use Symbols. Can you elaborate ? > Is the cache size set at a given limit? I think you are looking for CacheWeight (read the class comment). Basically, a cache has a weight, if it is exceeded, it starts removing items. How you compute the weight is up to you, the default is that each entry has a weight of 1, so you end up counting the entries. But you could use something like file or byte size of the value. > I see keyIndex is Dictionary new. What if I do have a lot of keys? Is the dictionary being copied over and over to get to the right size? Yes, of course it is a dictionary that grows when needed, what else do you want ? You want to predefine it at a certain size ? Sven PS: BTW, the implementation is slightly more complicated than what you would expect, it uses a double linked list and an index dictionary, to achieve proper O(1) performance in its common operations (accessing, adding & evicting entries). > Phil > > > Phil > > Phil > > > > > > > On Tue, Nov 11, 2014 at 7:52 PM, phil(a)highoctane.be <phil(a)highoctane.be> wrote: > I should ask more questions :-). > > Now, this still doesn't answer the question on how to use this to memoize object methods. > > I think that what is closest to what I am looking for is this: > > http://wiki.tcl.tk/10779 > http://wiki.tcl.tk/10981 > > > I am use we can do something like that in Pharo, with some memoize method in Object playing around with thisContext. > > SomeClass>>someMethodWith: aSomething and: aSomethingElse > > > > Like self haltIf: aSymbol will break if aSymbol is in the call stack. > > Any guru having a way to do that? > > Phil > > > > > On Tue, Nov 11, 2014 at 7:21 PM, Torsten Bergmann <astares(a)gmx.de> wrote: > Werner Kassens wrote: > >Hi, > >now this a nice idea, especially the memoizedUsing:cache idea. i would > >really appreciate it, if that would be MIT licenced. > >werner > > It already is, thanks to the permission of author John Cromartie who answered > us today. Both methods are in a slice already: > > Details in https://pharo.fogbugz.com/f/cases/14458 > > Thx > T. > > > >

Nov. 12, 2014

Re: [Pharo-users] Memoization Question

by phil＠highoctane.be

Looking at LRUCache tests, I've found this: testFibonacci "After an idea by Jan Vrany. Recursively enter the cache and its access protection" | fibCache | fibCache := self newCache. fibCache maximumWeight: 32; beThreadSafe; factory: [ :key | key < 2 ifTrue: [ key ] ifFalse: [ (fibCache at: key - 1) + (fibCache at: key - 2) ] ]. self assert: (fibCache at: 40) equals: 102334155 the factory thing basically solves the problem. Is there more docs about the caching somewhere? I read the code, comments, and unit tests but still, will value an explanation. Keying by object works, but with symbols, it isn't behaving. I think I miss something here. Is the cache size set at a given limit? I see keyIndex is Dictionary new. What if I do have a lot of keys? Is the dictionary being copied over and over to get to the right size? Phil Phil Phil On Tue, Nov 11, 2014 at 7:52 PM, phil(a)highoctane.be <phil(a)highoctane.be> wrote: > I should ask more questions :-). > > Now, this still doesn't answer the question on how to use this to memoize > object methods. > > I think that what is closest to what I am looking for is this: > > http://wiki.tcl.tk/10779 > http://wiki.tcl.tk/10981 > > > I am use we can do something like that in Pharo, with some memoize method > in Object playing around with thisContext. > > SomeClass>>someMethodWith: aSomething and: aSomethingElse > > > > Like self haltIf: aSymbol will break if aSymbol is in the call stack. > > Any guru having a way to do that? > > Phil > > > > > On Tue, Nov 11, 2014 at 7:21 PM, Torsten Bergmann <astares(a)gmx.de> wrote: > >> Werner Kassens wrote: >> >Hi, >> >now this a nice idea, especially the memoizedUsing:cache idea. i would >> >really appreciate it, if that would be MIT licenced. >> >werner >> >> It already is, thanks to the permission of author John Cromartie who >> answered >> us today. Both methods are in a slice already: >> >> Details in https://pharo.fogbugz.com/f/cases/14458 >> >> Thx >> T. >> >> >> >

Nov. 12, 2014

Re: [Pharo-users] question on syntax "negate numbers"

by Werner Kassens

On 11/12/2014 11:29 AM, JosÃ© ComesaÃ±a wrote: > Well, I don't understand why the book says that because in fact you can > define a -- binary method: yes, that is what i said, it's just an irritating bug in the book. werner

Nov. 12, 2014

Re: [Pharo-users] question on syntax "negate numbers"

by JosÃ© ComesaÃ±a

> > "Note that ââ is not allowed for parsing reasons" (i just checked the > latest version) > now honestly, dont you think that a) is a serious contender? that is all i > wanted to say. > werner > Well, I don't understand why the book says that because in fact you can define a -- binary method: SmallInteger>>-- aNumber ^ aNumber - self. works perfectly (although it is nonsense, I know)

Nov. 12, 2014

Re: [Pharo-users] String representation of Class

by Hilaire

Le 12/11/2014 10:22, Hilaire a Ã©crit : > Later I test directly from the browser with a dummy class with one > method with non ascii character. Fileout sometimes work (for example, I > add a space in the method body, save, remove the space, save again,...), > some time not. > > tested on Pharo 3.0 Reported here https://pharo.fogbugz.com/f/cases/14462/ZNInvalidUTF8-when-fileout-method-b… -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

Nov. 12, 2014

Re: [Pharo-users] String representation of Class

by Hilaire

Le 12/11/2014 10:15, phil(a)highoctane.be a Ã©crit : > Why not use FileSystem memory for those things? This would keep the > files inside the image. > because I didn't know about it :) But fileout(UTF8 conversion, again...) seems to be broken, see my other post. Hilaire -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

Nov. 12, 2014

Re: [Pharo-users] String representation of Class

by Hilaire

Thanks, interesting hack I need to learn from. Filout works well as long as only ascii appear in the body of the method. When a method contains non ascii (for example for a string) fileout get irrational with a ZNInvalidUTF8, but not always! For example, a script method as: scriptName ^ 'tÃ©te' does not lead to the error, but as following: scriptName ^ 'tÃ©tÃ©' leads to the error. Note the scriptName method works from Pharo To build the script I use the following code. createScriptFrom: dialog "Build a new script from the dialog, return the newly created script object" |scriptClass stream| scriptClass := DrGeoUserScript subclass: ('DrGeoScript', dialog scriptName hash printString) asSymbol instanceVariableNames: '' classVariableNames: '' category: 'DrGeoII-User'. "name" stream := WriteStream on: String new. stream << 'scriptName'; << Character cr; << Character tab; << $^; <<$'; << dialog scriptName; << $'. scriptClass compile: stream contents classified: 'public'. Later I test directly from the browser with a dummy class with one method with non ascii character. Fileout sometimes work (for example, I add a space in the method body, save, remove the space, save again,...), some time not. tested on Pharo 3.0 Hilaire Le 12/11/2014 09:33, Sven Van Caekenberghe a Ã©crit : > String streamContents: [ :out | Association fileOutOn: out ] > > I am not sure it covers everything, but for some script methods this will do. -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

Nov. 12, 2014

Re: [Pharo-users] String representation of Class

by kilon alios

and if you want a json like implementation there is filetree. I think json is a much better format than XML but I am nowhere near to an experienced web developer. On Wed, Nov 12, 2014 at 11:15 AM, phil(a)highoctane.be <phil(a)highoctane.be> wrote: > On Wed, Nov 12, 2014 at 9:21 AM, Hilaire <hilaire(a)drgeo.eu> wrote: > >> Le 12/11/2014 09:08, phil(a)highoctane.be a Ã©crit : >> >> Is it possible to export a whole class as a string, then import it back >> >> from a string representation to a class? >> > >> > Isn't that a fileOut/fileIn thing? >> > >> >> Yes, however I don't want it on a .st file (to avoid possible trouble on >> the end user DrGeo installation) but on a string within Smalltalk. >> > > Why not use FileSystem memory for those things? This would keep the files > inside the image. > > Phil > >> >> Hilaire >> >> >> >> -- >> Dr. Geo - http://drgeo.eu >> iStoa - http://istoa.drgeo.eu >> >> >> >> >

Nov. 12, 2014