January 2019 - Pharo-users - lists.pharo.org

Re: [Pharo-users] PetitParser question

by Tudor Girba

Hi Konrad, A somewhat similar issue is present in an XML grammar: the closing element must match the opening element. In PPXmlGrammar, you have a condition that matches it and throws a failure otherwise: element "[39] element ::= EmptyElemTag | STag content ETag" ^ $< asParser , qualified , attributes , whitespace optional , ('/>' asParser / ($> asParser , content , [ :stream | stream position ] asParser , '</' asParser , qualified , whitespace optional , $> asParser)) ==> [ :nodes | nodes fifth = '/>' ifTrue: [ Array with: nodes second with: nodes third with: #() ] ifFalse: [ nodes second = nodes fifth fifth ifTrue: [ Array with: nodes second with: nodes third with: nodes fifth second ] ifFalse: [ PPFailure message: 'Expected </' , nodes second qualifiedName , '>' context: nil at: nodes fifth third ] ] ] Cheers, Doru > On Jan 27, 2019, at 4:38 PM, Konrad Hinsen <konrad.hinsen(a)fastmail.net> wrote: > > Dear Tomo, > >> This post might help you. In case of PetitParser2, it's PP2Failure instead >> of PPFailure. >> https://stackoverflow.com/questions/15371334/how-can-a-petitparser-parse-ru… > > That's indeed a possible solution: parse for arbitrary operators, and then add a test for equality that can make everything fail in the end. I will try it out! > > Thanks, > Konrad. > > -- www.feenk.com "Not knowing how to do something is not an argument for how it cannot be done."

Jan. 27, 2019

Re: [Pharo-users] PetitParser question

by Konrad Hinsen

Dear Tomo, > This post might help you. In case of PetitParser2, it's PP2Failure instead > of PPFailure. > https://stackoverflow.com/questions/15371334/how-can-a-petitparser-parse-ru… That's indeed a possible solution: parse for arbitrary operators, and then add a test for equality that can make everything fail in the end. I will try it out! Thanks, Konrad.

Jan. 27, 2019

Class name with diacritic character and Pharo

by Dominique Dartois

Jan. 27, 2019

Re: [Pharo-users] Falsehoods programmers believe about Smalltalk

by Sven Van Caekenberghe

> On 27 Jan 2019, at 03:38, Richard O'Keefe <raoknz(a)gmail.com> wrote: > > What *is* the persistence scheme in Pharo these days? FUEL is the standard binary serialiser (which can do blocks, execution stacks, etc). STON is the standard textual serialiser (that cannot do blocks). It has been like that for many versions.

Jan. 27, 2019

Re: [Pharo-users] Cryptography long filename in github repo causes error in Win 10 loading

by Sven Van Caekenberghe

Switching to the Tonel file format in git solves this. There is an option to convert a repo in Iceberg (under extra). > On 27 Jan 2019, at 05:01, Sanjay Minni <sm(a)planage.com> wrote: > > Hi, > > can the following filename in Cryptography package in github repository be > shortened. > its causing a crash when loading in Win 10 (so a workaround has to be done > just for this much) > as this package is used by Voyage it may be fairly in use. > > filename: > cryptUIDlgSelectCertificateFromStore.winHandle.pwszTitle.pwszDisplayString.dwDontUseColumn.flags.reserved..st > > location: > https://github.com/pharo-contributions/Cryptography/tree/master/source/Cryp… > > Probably this filename is autogenerated so a tweak could be attempted > > > > This seems to work - at least loading seems to have gone thru > > but is it possible to shorten the following filename in the github > repository itself > > cryptUIDlgSelectCertificateFromStore.winHandle.pwszTitle.pwszDisplayString.dwDontUseColumn.flags.reserved..st > > it is in > https://github.com/pharo-contributions/Cryptography/tree/master/source/Cryp… > > i do not know if there any any other filenames that long > > > EstebanLM wrote >> Hi, >> >> Iâm sorry I didnât see this before. >> This happens because there are many projects that are still using filetree >> format which stores one file per method. And the problem here is that >> windows has a path limit that you are exceeding. >> To workaround this problem: >> >> - Open iceberg settings (toolbar button in repositories window). >> - Check "Share repositories between imagesâ. >> - In "Location for shared repositoriesâ put something like âC:\repoâ (you >> will need to create that dir too). >> >> And retry :) >> >> Esteban >> >>> On 4 Dec 2018, at 17:24, Sanjay Minni < > >> sm@ > > > > > ----- > cheers, > Sanjay > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >

Jan. 27, 2019

Re: [Pharo-users] Instance of ByteArray did not understand #isByteString in ZnUTF8Encoder

by Sven Van Caekenberghe

> On 27 Jan 2019, at 00:20, HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> wrote: > > Hi Sven, > > Yes, your examples work in Pharo 7, however I also wanted a progress bar, and two exception handlers: > > 1) Resume when my files are too large (ZnEntityTooLarge). > 2) When download failed display an error message. > > Now for 1) I consider to wrap the whole download code - because I don't like #isKindOf: - into this: > > ZnMaximumEntitySize value: someMaxSize during: [ ... ]. There is also an accessor #maximumEntitySize: Because ZnMaximumEntitySize will go away for a more general mechanism. > I changed my code to use #downloadTo: > Thank you for the suggestion!! > > Cheers, > > HernÃ¡n > > El sÃ¡b., 26 ene. 2019 a las 19:05, Sven Van Caekenberghe (<sven(a)stfx.eu>) escribiÃ³: > BTW, ZTimezone in ZTimestamp does something similar to what I guess you want to do: > > downloadFallbackZoneinfoDataset > "Download a fallback copy of the zoneinfo dataset and return its location. > See #fallbackZoneinfoDatasetURL for more info and a warning" > > | zipLocation zoneinfoLocation | > zipLocation := self fallbackZoneinfoDatasetURL file asFileReference. > zipLocation ensureDelete. > ZnClient new > url: self fallbackZoneinfoDatasetURL; > downloadTo: zipLocation; > close. > zoneinfoLocation := zipLocation parent / 'zoneinfo'. > zoneinfoLocation ensureDeleteAll. > ZipArchive new > readFrom: zipLocation; > extractAllTo: zoneinfoLocation parent; > close. > ^ zoneinfoLocation > > where > > fallbackZoneinfoDatasetURL > "The URL to the ZIP archive zoneinfo.zip which is offered as a fallback for > systems (such as Windows) that do no have their own copy of this data. > Note that it is highly recommended that you use such a OS maintained dataset, > as this data is changed (being added to) each year." > > ^ 'https://github.com/svenvc/ztimestamp/raw/master/rsrc/zoneinfo.zip' asUrl > > > On 26 Jan 2019, at 23:00, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > > > Hmm, the following all work for me (in Pharo 7.0.1 on macOS): > > > > ZnClient new > > url: 'https://github.com/biosmalltalk/biopharo/raw/develop/test_files/BioSmalltal…'; > > get; > > yourself. > > > > ZnClient new > > url: 'https://github.com/biosmalltalk/biopharo/raw/develop/test_files/BioSmalltal…'; > > get; > > contents. > > > > ZnClient new > > get: 'https://github.com/biosmalltalk/biopharo/raw/develop/test_files/BioSmalltal…'. > > > > ZnClient new > > url: 'https://github.com/biosmalltalk/biopharo/raw/develop/test_files/BioSmalltal…'; > > downloadTo: '/tmp'. > > > > $ ls -lah /tmp/BioSmalltalkTestFiles.zip > > -rw-r--r--@ 1 sven wheel 5.3M Jan 26 22:57 /tmp/BioSmalltalkTestFiles.zip > > > > $ file /tmp/BioSmalltalkTestFiles.zip > > /tmp/BioSmalltalkTestFiles.zip: Zip archive data, at least v2.0 to extract > > > >> On 26 Jan 2019, at 20:36, HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> wrote: > >> > >> Hi there, > >> > >> In Pharo 7.0 I've encountered an error related with the new streams changes (https://github.com/pharo-open-documentation/pharo-wiki/blob/master/Migratio…) while downloading a zip file. Problem is ZnUTF8Encoder expects a String, but my code which worked in Pharo 6 provides a ByteArray. I've isolated it in a reproducible way: > >> > >> | webClient resp | > >> webClient := ZnClient new. > >> UIManager default informUserDuring: [ :bar | > >> bar label: 'Downloading resources for ' , self class printString. > >> [ webClient > >> signalProgress: true; > >> get: 'https://github.com/biosmalltalk/biopharo/raw/develop/test_files/BioSmalltal…' ] > >> on: HTTPProgress , ZnEntityTooLarge > >> do: [ : ex | > >> (ex isKindOf: ZnEntityTooLarge) > >> ifTrue: [ ex resume ] > >> ifFalse: [ > >> | progress | > >> progress := ex. > >> progress isEmpty > >> ifFalse: [ > >> bar current: progress percentage. > >> progress total ifNotNil: [ :aTotalNumber | bar label: 'Downloading ' ] ]. > >> progress resume ] ] ]. > >> (resp := webClient response) isSuccess > >> ifTrue: [ 'output2.zip' asFileReference writeStreamDo: [ : stream | stream nextPutAll: resp contents ] ] > >> ifFalse: [ self error: 'Cannot download resource files' ]. > >> > >> I also tried using #writeOn: on the response, but that also wrote the response header: > >> > >> self response writeOn: 'test1.zip' asFileReference writeStream. > >> self response writeOn: 'test2.zip' asFileReference binaryWriteStream. > >> > >> > >> HTTP/1.1 200 OK > >> Via: 1.1 varnish > >> Strict-Transport-Security: max-age=31536000 > >> ... > >> > >> PK ÃÂ¸ Ã D BioSmalltalkTestFiles/PK ÃÂ½U?+*8!" K / BioSmalltalkTestFiles/A4A7DS6V01S-Alignment.xmlÃÂÃÅksÃâºH Ãâ ÃÂ¿Ã ÃÂ¯ÃÂ¨Ã Ãâ¡ÃÂ©Ã "ÃâÃÂ¹_ Ã ÃÂ¦: 0 R$`ÃÂ°jSS.,aÃâº > >> > >> Any suggestion? > >> > >> Cheers, > >> > >> HernÃ¡n > >> > >> > >> > > > >

Jan. 27, 2019

Re: [Pharo-users] [VIDEO TUTORIAL] How to use external code editors to code in Pharo

by eftomi

Good observations! Shortcuts in general are shown under System > Keymap browser. You can move from pane to pane with left and right arrows, this can be set under Pharo Settings (ctrl-o-s). From methods pane you can even go to the code editing pane (for the selected method) by pressing right arrow. However, once you are there, you cannot move back, even if you assign a different key combination to move between panes. Or is there a magic key which can escape..? Ctrl-f is now tied to 'Choose a class' action, it would be convenient if one could jump to filter packages/classes directly from packages or classes pane. And a way to open subpackages ... How to reach classes / instances etc radio buttons in the middle of Calypso window is also unknown to me, although some of these modes are accessible with certain key combinations - but not from the code editing pane. If you navigate from the code editing pane to other tabs (ctrl-1 for the first tab, ctrl-2 for the second etc), it's impossible to get the editing pane properly selected again without the mouse. > Pharo has been working to consolidate these - still ongoing. > If someone can provide a lead in to the related definitions for Calypso's > <CTRL-F>, <TAB> & <CTRL-TAB> > perhaps experiment with it and propose a PR. This would be great. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Jan. 27, 2019

Cryptography long filename in github repo causes error in Win 10 loading

by Sanjay Minni

Hi, can the following filename in Cryptography package in github repository be shortened. its causing a crash when loading in Win 10 (so a workaround has to be done just for this much) as this package is used by Voyage it may be fairly in use. filename: cryptUIDlgSelectCertificateFromStore.winHandle.pwszTitle.pwszDisplayString.dwDontUseColumn.flags.reserved..st location: https://github.com/pharo-contributions/Cryptography/tree/master/source/Cryp… Probably this filename is autogenerated so a tweak could be attempted This seems to work - at least loading seems to have gone thru but is it possible to shorten the following filename in the github repository itself cryptUIDlgSelectCertificateFromStore.winHandle.pwszTitle.pwszDisplayString.dwDontUseColumn.flags.reserved..st it is in https://github.com/pharo-contributions/Cryptography/tree/master/source/Cryp… i do not know if there any any other filenames that long EstebanLM wrote > Hi, > > Iâm sorry I didnât see this before. > This happens because there are many projects that are still using filetree > format which stores one file per method. And the problem here is that > windows has a path limit that you are exceeding. > To workaround this problem: > > - Open iceberg settings (toolbar button in repositories window). > - Check "Share repositories between imagesâ. > - In "Location for shared repositoriesâ put something like âC:\repoâ (you > will need to create that dir too). > > And retry :) > > Esteban > >> On 4 Dec 2018, at 17:24, Sanjay Minni < > sm@ ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Jan. 27, 2019

Re: [Pharo-users] [squeak-dev] Falsehoods programmers believe about Smalltalk

by Richard O'Keefe

I have my own Smalltalk system implemented as a batch compiler via C. This was originally just going to be a baseline for a student wanting to work on JIT, but he went elsewhere and I found the system surprisingly useful. I also wanted something that hewed closely to the ANSI Smalltalk standard, but could diverge in other matters (like not having dynamic code modification). - All Smalltalk bytecode sets are stack-based VM. (?) My system has no bytecodes. Smalltalk=>C=>native code. - Bytecodes are always fixed-size. (?) False back in the Blue Book. Why does it matter anyway? - Most of the time spent by a VM is in the instruction interpreter. (actually it's in the GC right?) There is no interpreter in my system, and many modern systems use a JIT. That or they generate Javascript or JVM instructions or .NET or something, and then _that_ gets turned into native code. - You cannot serialize objects containing blocks. (IIRC one can use MessageSends) True in my system but that's because blocks contain pointers to native code and may contain pointers into the C stack. I have plans to work around this, but it has not been a priority. Something I don't ever plan to deal with is objects containing references to external objects (memory-mapped segments, file descriptors, sockets, ...) and it is not at all clear to me what the semantics should be. BinaryObjectStorage in VisualWorks has no trouble with blocks. I meant to try this in Pharo 7.0. The image I just installed via the launcher has no DataStream, ReferenceStream, or SmartRefStream, but the class comment for MCDataStream begins "This is the save-to-disk facility. A DataStream can store one or more objects in a persistent form. To handle objects with sharing and cycles, you must use a ReferenceStream instead of a DataStream. (Or SmartRefStream.) ReferenceStream is typically faster and produces smaller files because it doesn't repeatedly write the same Symbols." This was also the case back to Pharo 2.0. What *is* the persistence scheme in Pharo these days? - Image cannot be bootstrapped. (This is possible in ST/X and now in Pharo I think). There are no images in my system. - All Smalltalks includes UI classes. (GemStone doesn't have AFAIK). It depends on what you mean by "include". Gnu Smalltalk *has* UI classes but they are not loaded by default. - All implementations uses direct pointers, (GST?) True in my case, but that's because I'm lazy and using the Boehm collector. - All implementations uses green threads. (VAST? MT?) False in my case. A Process is a POSIX (red) thread and no green threads exist. This meant having to keep the interface fairly lean, but honestly wasn't that hard, since the Boehm collector handled the hard stuff. On Tue, 22 Jan 2019 at 13:27, HernÃ¡n Morales Durand < hernan.morales(a)gmail.com> wrote: > > Done. > > I have some possible myths, but I'd like to confirm or reject: > > - All Smalltalk bytecode sets are stack-based VM. (?) > - Bytecodes are always fixed-size. (?) > - Most of the time spent by a VM is in the instruction interpreter. > (actually it's in the GC right?) > - You cannot serialize objects containing blocks. (IIRC one can use > MessageSends) > - Image cannot be bootstrapped. (This is possible in ST/X and now in Pharo > I think). > - All Smalltalks includes UI classes. (GemStone doesn't have AFAIK). > - All implementations uses direct pointers, (GST?) > - All implementations uses green threads. (VAST? MT?) > > I'm sure people in this list will have a lot more myths heard from > Conferences, Forums, Videos, Talks, etc. Like the guy who said Smalltalk > was dead. So if you did something which could be ignored publicly, please > don't hesitate to reply or ping me to get added as collaborator. > > Cheers, > > HernÃ¡n > > > > El dom., 20 ene. 2019 a las 22:41, Eliot Miranda (<eliot.miranda(a)gmail.com>) > escribiÃ³: > >> Hi HernÃ¡n, >> >> On Sun, Jan 20, 2019 at 2:31 PM HernÃ¡n Morales Durand < >> hernan.morales(a)gmail.com> wrote: >> >>> Hi there, >>> >>> I just created a GitHub repo to collect myths around Smalltalk-based >>> technologies: Pharo, Squeak, VW, VAST, Smalltalk/X, GNU/ST, etc. in the >>> spirit of the Falsehoods lists [1-4]. >>> >>> This is just a draft now but please feel free to add falsehoods based on >>> your own experiences. Examples are greatly appreciated. >>> >> >> You want pull requests? If not, would you give me write permission? I'd >> love to add to the "Smalltalk is obsolete" section... >> >> >>> >>> https://github.com/hernanmd/falsehoods_smalltalk >>> >>> Cheers, >>> >>> HernÃ¡n >>> >>> [1] >>> https://infiniteundo.com/post/25326999628/falsehoods-programmers-believe-ab… >>> [2] >>> https://chiselapp.com/user/ttmrichter/repository/gng/doc/trunk/output/false… >>> [3] >>> https://github.com/googlei18n/libphonenumber/blob/master/FALSEHOODS.md >>> [4] >>> https://meta-package-manager.readthedocs.io/en/develop/falsehoods.html >>> >>> >>> >> >> -- >> _,,,^..^,,,_ >> best, Eliot >> >

Jan. 27, 2019

Re: [Pharo-users] [VIDEO TUTORIAL] How to use external code editors to code in Pharo

by Ben Coman

On Sun, 27 Jan 2019 at 02:01, eftomi <tomaz.turk(a)ef.uni-lj.si> wrote: > > you can use it with the keyboard. > > Using it, you do not require the mouse. > > And, in addition, you do not need to remember complicated shortcuts: > > Calypso and the tools of Pharo will > never be covered with shortcutsâ¦ > > there are too many options. > > So yes, it is not a replacement of the keyboard: is a way to USE the > > keyboard in Calypso. > My little test... <CTRL-O><B> brings up the browser Arrow keys scroll the Packages pane. What I can't seem to do via keyboard is get to the "Filter..." input box That could be useful. Perhaps <CTRL-F> from here could be re-purposed for "Filter..."? How many people currently use <CTRL-F> from the Packages pane? (I never have) The next thing to determine is how to move to the Class pane. <TAB> could be a good candidate? Also, <CTRL-TAB> currently opens an Inspector on the currently selected package or class. Is that a common requirement? <CTRL-TAB> might be better used to cycle between the tabs in the bottom pane, which would align with common usage in web browsers? The above functional reassignments of <CTRL-F>, <TAB> & <CTRL-TAB> could provide a reasonably good start to keyboard-only browser use. Where can the current definitions of these for Calypso be found? > Kkhmmm. I'll try to survive. I'm talking about moving left, right, up, > down, > choose/enter, escape - that kind of things, basic things. As I see from > posts on various places (e. g. on stack overflow) this is an ongoing debate > for years, about shortcuts defined in several places, text editor hijacking > the keyboard, etc. Pharo has been working to consolidate these - still ongoing. If someone can provide a lead in to the related definitions for Calypso's <CTRL-F>, <TAB> & <CTRL-TAB> perhaps experiment with it and propose a PR. cheers -ben

Jan. 27, 2019