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[ANN] Grouper

by Julien Delplanque

Hello, I made a small library that reify grouping (that one does via #groupBy: usually): Grouper https://github.com/juliendelplanque/Grouper It is designed in the same spirit as SortFunction, but for grouping. Quick example: The following code snippet using Grouper: (10 to: 50)groupUsing: [:integer | integer asString first ]. "an OrderedDictionary( $1->#(10 11 12 13 14 15 16 17 18 19) $2->#(20 21 22 23 24 25 26 27 28 29) $3->#(30 31 32 33 34 35 36 37 38 39) $4->#(40 41 42 43 44 45 46 47 48 49) $5->#(50))" is equivalent to the following code snippet using built-in|#groupedBy:|method: (10 to: 50)groupedBy: [:integer | integer asString first ] "an OrderedDictionary( $1->#(10 11 12 13 14 15 16 17 18 19) $2->#(20 21 22 23 24 25 26 27 28 29) $3->#(30 31 32 33 34 35 36 37 38 39) $4->#(40 41 42 43 44 45 46 47 48 49) $5->#(50))" The advantage of using it is that it allows one to compose grouper objects. Thus, it is easy to describe grouping on 2 or 3 levels. Fore example: The power of Grouper is that group description are first-class objects. Thus, it is possible to compose group descriptions in order to group a flat collection on multiple levels. For example: groupComposition:= [:integer | integer asString first ] grouper , [:integer | integer asString second ]. (10 to: 50)groupUsing: groupComposition. "an OrderedDictionary( $1->an OrderedDictionary( $0->#(10) $1->#(11) $2->#(12) $3->#(13) $4->#(14) $5->#(15) $6->#(16) $7->#(17) $8->#(18) $9->#(19)) $2->an OrderedDictionary( $0->#(20) $1->#(21) $2->#(22) $3->#(23) $4->#(24) $5->#(25) $6->#(26) $7->#(27) $8->#(28) $9->#(29)) $3->an OrderedDictionary( $0->#(30) $1->#(31) $2->#(32) $3->#(33) $4->#(34) $5->#(35) $6->#(36) $7->#(37) $8->#(38) $9->#(39)) $4->an OrderedDictionary( $0->#(40) $1->#(41) $2->#(42) $3->#(43) $4->#(44) $5->#(45) $6->#(46) $7->#(47) $8->#(48) $9->#(49)) $5->an OrderedDictionary($0->#(50)))" On the github, there are more example showing how to build trees with custom objects. Any feedback for this library is welcome. I would like to propose it to Pharo in the near future because it would simplify a lot of code in DrTests (related to result tree views, the tree on the right of the UI). I don't know if it will be possible before next release as we are in feature freeze. Cheers, Julien

Dec. 9, 2019

Re: [Pharo-users] [ANN] ReStore for Pharo - object<>relational database framework

by Pierce Ng

On Sun, Dec 08, 2019 at 01:09:29PM +0000, John Aspinall wrote: > https://github.com/rko281/ReStoreForPharo <https://github.com/rko281/ReStoreForPharo> > Initially ReStore supports SQLite via UDBC and PostgreSQL via P3; > kudos and thanks to the authors of these packages. Documentation > largely remains on the âto doâ list but the ReadMe gives a flavour of > what ReStore is and what it can do via a few simple examples. Please > feel free to post any questions here and Iâll do my best to answer > them. Very nice! Thanks! Pierce

Dec. 9, 2019

[ Example ] ZnKeyValueStore

by Sven Van Caekenberghe

Hi, I added a new example to Zinc HTTP Components, a simple in-memory key-value store exposed as a REST web service (ZnKeyValueStoreDelegate) and a client to access this service over HTTP (ZnKeyValueStoreClient). Check the class comments for a more detailed explanation. ZnKeyValueStoreTest #testUsage and #setUp implement a runnable example and functional test. You will have to load the latest version of Zn from https://github.com/svenvc/zinc Sven -- Sven Van Caekenberghe Proudly supporting Pharo http://pharo.org http://association.pharo.org http://consortium.pharo.org

Dec. 8, 2019

Re: [Pharo-users] [ANN] ReStore for Pharo - object<>relational database framework

by TomaÅ¾ Turk

Hi, ReStore looks quite sleek, thank you for your nice contribution! I wonder if we could "hook it up" with PharoADO. When I find some time, I can look into the approach you took in SSW ReStore P3 and SSW ReStore UDBC SQLite. For Glorp, you basically just need to send an SQL query that Glorp prepares directly to DB and pack the received resultset into an array structure. Best wishes, Tomaz ------ Original Message ------ From: "John Aspinall" <john.aspinall(a)gmail.com> To: pharo-users(a)lists.pharo.org Sent: 8.12.2019 14:09:29 Subject: [Pharo-users] [ANN] ReStore for Pharo - object<>relational database framework >Hello, > >At ESUG 2018 I gave a presentation on some aspects of ReStore, my >object<>relational database framework for Dolphin Smalltalk. Afterwards >a number of people asked if ReStore was available for Pharo, the answer >at the time unfortunately being âno". > >A year later I found myself with some spare time and decided to look at >porting ReStore to Pharo (mainly to give myself some experience with >Pharo). Iâm pleased to say ReStore is now available for Pharo and can >be found at my GitHub account: > >https://github.com/rko281/ReStoreForPharo > >Initially ReStore supports SQLite via UDBC and PostgreSQL via P3; kudos >and thanks to the authors of these packages. Documentation largely >remains on the âto doâ list but the ReadMe gives a flavour of what >ReStore is and what it can do via a few simple examples. Please feel >free to post any questions here and Iâll do my best to answer them. > >I hope some of you find ReStore useful! > >John Aspinall

Dec. 8, 2019

Re: [Pharo-users] [ANN] ReStore for Pharo - object<>relational database framework

by Sven Van Caekenberghe

This looks great, John. Thank you for your contribution. > On 8 Dec 2019, at 14:09, John Aspinall <john.aspinall(a)gmail.com> wrote: > > Hello, > > At ESUG 2018 I gave a presentation on some aspects of ReStore, my object<>relational database framework for Dolphin Smalltalk. Afterwards a number of people asked if ReStore was available for Pharo, the answer at the time unfortunately being âno". > > A year later I found myself with some spare time and decided to look at porting ReStore to Pharo (mainly to give myself some experience with Pharo). Iâm pleased to say ReStore is now available for Pharo and can be found at my GitHub account: > > https://github.com/rko281/ReStoreForPharo > > Initially ReStore supports SQLite via UDBC and PostgreSQL via P3; kudos and thanks to the authors of these packages. Documentation largely remains on the âto doâ list but the ReadMe gives a flavour of what ReStore is and what it can do via a few simple examples. Please feel free to post any questions here and Iâll do my best to answer them. > > I hope some of you find ReStore useful! > > John Aspinall

Dec. 8, 2019

[ANN] ReStore for Pharo - object<>relational database framework

by John Aspinall

Hello, At ESUG 2018 I gave a presentation on some aspects of ReStore, my object<>relational database framework for Dolphin Smalltalk. Afterwards a number of people asked if ReStore was available for Pharo, the answer at the time unfortunately being âno". A year later I found myself with some spare time and decided to look at porting ReStore to Pharo (mainly to give myself some experience with Pharo). Iâm pleased to say ReStore is now available for Pharo and can be found at my GitHub account: https://github.com/rko281/ReStoreForPharo <https://github.com/rko281/ReStoreForPharo> Initially ReStore supports SQLite via UDBC and PostgreSQL via P3; kudos and thanks to the authors of these packages. Documentation largely remains on the âto doâ list but the ReadMe gives a flavour of what ReStore is and what it can do via a few simple examples. Please feel free to post any questions here and Iâll do my best to answer them. I hope some of you find ReStore useful! John Aspinall

Dec. 8, 2019

Re: [Pharo-users] Roassal 2 Stable: Problem browsing the source code of the examples

by Santiago Bragagnolo

Or whom to ask El sÃ¡b., 7 de dic. de 2019 09:44, Santiago Bragagnolo < santiagobragagnolo(a)gmail.com> escribiÃ³: > Maybe Milton has some idea? > > > > El vie., 6 de dic. de 2019 19:00, Offray Vladimir Luna CÃ¡rdenas < > offray.luna(a)mutabit.com> escribiÃ³: > >> Hi, >> >> We were at our usual data activism workshop, trying to visualize a tag >> cloud some Tweets about the civic strike in Colombia. Is happening all >> over Latin America, France, Hong Kong..., So would be nice to have a >> broad overview over the noise created by social media. Anyway, we >> installed the stable version of Roassal 2 over Pharo 7 and when trying >> to browse the source code of any example in the example browser we got >> the following error message when clicking on the Playground tab (nearby >> to the canvas): >> >> Instance of RBSequenceNode did not understand >> #formattedCodeWithMaxLineLength: >> >> This was a good opportunity to show other ways to approach to the code, >> but I think is important to improve a smoother experience for newcomers, >> including the ability to go from canvas to the source code in Roassal >> examples browser. >> >> Any clue about what is happening to the Roassal 2 Examples Browser? >> >> Thanks, >> >> Offray >> >> >> >>

Dec. 7, 2019

Re: [Pharo-users] Roassal 2 Stable: Problem browsing the source code of the examples

by Santiago Bragagnolo

Maybe Milton has some idea? El vie., 6 de dic. de 2019 19:00, Offray Vladimir Luna CÃ¡rdenas < offray.luna(a)mutabit.com> escribiÃ³: > Hi, > > We were at our usual data activism workshop, trying to visualize a tag > cloud some Tweets about the civic strike in Colombia. Is happening all > over Latin America, France, Hong Kong..., So would be nice to have a > broad overview over the noise created by social media. Anyway, we > installed the stable version of Roassal 2 over Pharo 7 and when trying > to browse the source code of any example in the example browser we got > the following error message when clicking on the Playground tab (nearby > to the canvas): > > Instance of RBSequenceNode did not understand > #formattedCodeWithMaxLineLength: > > This was a good opportunity to show other ways to approach to the code, > but I think is important to improve a smoother experience for newcomers, > including the ability to go from canvas to the source code in Roassal > examples browser. > > Any clue about what is happening to the Roassal 2 Examples Browser? > > Thanks, > > Offray > > > >

Dec. 7, 2019

Re: [Pharo-users] Calypso loading code spinner

by tbrunz

Hi Esteban, This sounds like your host OS is powering down your laptop's HDD while on battery, to save energy. Plugging it in triggers a different rule that selects "performance" over "energy savings" and keeps the drive up & spinning constantly. I would check the Win10 power management rules to verify this. You can also select a different power profile when on battery there, or create a new one (such as "power savings except for the hard drive" when on battery). -Ted -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Dec. 6, 2019

Re: [Pharo-users] Calypso loading code spinner

by Esteban Maringolo

Answering myself... It seems to be related with the power management because as soon as I plugged in my laptop the spinning effect went away (and also the whole environment got faster). Maybe it has to do with the guest OS power management, although I didn't see any noticeable slowdown in other apps within the VM. Is there any specific PM thing in the Pharo VM? Or should I look at the VBOX/Ubuntu settings. Regards. Esteban A. Maringolo On Fri, Dec 6, 2019 at 7:02 PM Esteban Maringolo <emaringolo(a)gmail.com> wrote: > > It is happening to me very often that to access the source of a > method, or sometimes to find senders/implementors, the Calypso browser > takes a long time to load it. > > By long I mean from two to five seconds, sometimes longer. > > I'm running Pharo 7 within a VirtualBox VM with Ubuntu 16.04 in a > Windows 10 host. > > Regards, > > Pharo 7.0.3 > Build information: > Pharo-7.0.3+build.164.sha.591a635c8922e5f1cff1d0b3fbf2e525b590d25f (64 > Bit) > > > Esteban A. Maringolo

Dec. 6, 2019