- Pharo-users - lists.pharo.org

Re: [Pharo-users] [ANN] JNIPort for Pharo 3.0 alpha

by Esteban A. Maringolo

2014-04-08 16:04 GMT-03:00 Pharo4Stef <pharo4Stef(a)free.fr>: > In VW there is the concept of object bodies and head now we will eventually have that with Spur. Maybe clement explained it somewhere in his blog (I understood the point once and of course I forgot). > > Now I wonder what changed so much between 1.2 and 3.0 Dolphin's #become: uses the same concept. E.g. a become: b Doesn't switch references, but instead "body" pointers in a and b. It is, a becomes b, and b becomes a. i Time microsecondsToRun: [1000 timesRepeat: [String new become: String new ]]. 684 898 663 812 665 Also, there is a #oneWayBecome: which DOES an object table scan, and makes all references to the receiver point to the argument object (it is, a becomes b, and not the other way around). This gets slow directly proportional to the size of the OT. Time microsecondsToRun: [1000 timesRepeat: [String new become: String new ]]. 10936532 Most proxies and stubs implementations in Dolphin uses #become: because it is instantaneous, and the "old" object (b in this) eventually gets garbage collected. Regards. Esteban A. Maringolo

April 27, 2014

Re: [Pharo-users] Video Tutorials about Pharo

by Tudor Girba

+1 Doru On Sun, Apr 27, 2014 at 11:54 AM, Bernat Romagosa < tibabenfortlapalanca(a)gmail.com> wrote: > Very nice initiative, keep it on! :) > On Apr 27, 2014 10:45 AM, "Marcus Denker" <marcus.denker(a)inria.fr> wrote: > >> Very nice! I will watch them allâ¦ >> >> On 26 Apr 2014, at 20:16, kilon alios <kilon.alios(a)gmail.com> wrote: >> >> Hello pharoers . I have created a playlist in youtube where in the past >> few days I am keep adding new tutorials about the basics of Pharo. >> >> >> https://www.youtube.com/watch?v=Ol5ivaEATLQ&list=PLqbtQ7OkSta0ULYAd7Qdxof85… >> >> For now I am focusing on the vary basics. So far the tutorials are >> >> 1) Why Pharo -> Explaining why I love Pharo and what Pharo is. >> 2) Install Pharo >> 3) Create a Class >> 4) Workspace Variables >> 5) Instance Variables >> 6) Temporary Variables >> >> I try to keep the duration at most around 10 minutes , if I can around >> 3-4 minutes. My goals is to focus on one or two features per tutorial. >> >> My focus for now is explaining the basics of Pharo the Language and Pharo >> the IDE. I hope however that after that I will have the energy and time to >> focus on Pharo libraries, like Nativeboost, Athens, Roosal , Sockets and >> many more. >> >> If my free time holds and I do not run out of steam, I should be able to >> produce around 30 - 60 hours per year of Video Tutorials that will be able >> to document a ton of Pharo functionality. >> >> Already the Playlist is over an hour long and I try to keep my tutorials >> focused entirely on the practical side. >> >> Your comments and support is greatly appreciated. >> >> >> -- www.tudorgirba.com "Every thing has its own flow"

April 27, 2014

Re: [Pharo-users] Video Tutorials about Pharo

by Bernat Romagosa

Very nice initiative, keep it on! :) On Apr 27, 2014 10:45 AM, "Marcus Denker" <marcus.denker(a)inria.fr> wrote: > Very nice! I will watch them allâ¦ > > On 26 Apr 2014, at 20:16, kilon alios <kilon.alios(a)gmail.com> wrote: > > Hello pharoers . I have created a playlist in youtube where in the past > few days I am keep adding new tutorials about the basics of Pharo. > > > https://www.youtube.com/watch?v=Ol5ivaEATLQ&list=PLqbtQ7OkSta0ULYAd7Qdxof85… > > For now I am focusing on the vary basics. So far the tutorials are > > 1) Why Pharo -> Explaining why I love Pharo and what Pharo is. > 2) Install Pharo > 3) Create a Class > 4) Workspace Variables > 5) Instance Variables > 6) Temporary Variables > > I try to keep the duration at most around 10 minutes , if I can around 3-4 > minutes. My goals is to focus on one or two features per tutorial. > > My focus for now is explaining the basics of Pharo the Language and Pharo > the IDE. I hope however that after that I will have the energy and time to > focus on Pharo libraries, like Nativeboost, Athens, Roosal , Sockets and > many more. > > If my free time holds and I do not run out of steam, I should be able to > produce around 30 - 60 hours per year of Video Tutorials that will be able > to document a ton of Pharo functionality. > > Already the Playlist is over an hour long and I try to keep my tutorials > focused entirely on the practical side. > > Your comments and support is greatly appreciated. > > >

April 27, 2014

Re: [Pharo-users] Video Tutorials about Pharo

by Marcus Denker

Very nice! I will watch them allâ¦ On 26 Apr 2014, at 20:16, kilon alios <kilon.alios(a)gmail.com> wrote: > Hello pharoers . I have created a playlist in youtube where in the past few days I am keep adding new tutorials about the basics of Pharo. > > https://www.youtube.com/watch?v=Ol5ivaEATLQ&list=PLqbtQ7OkSta0ULYAd7Qdxof85… > > For now I am focusing on the vary basics. So far the tutorials are > > 1) Why Pharo -> Explaining why I love Pharo and what Pharo is. > 2) Install Pharo > 3) Create a Class > 4) Workspace Variables > 5) Instance Variables > 6) Temporary Variables > > I try to keep the duration at most around 10 minutes , if I can around 3-4 minutes. My goals is to focus on one or two features per tutorial. > > My focus for now is explaining the basics of Pharo the Language and Pharo the IDE. I hope however that after that I will have the energy and time to focus on Pharo libraries, like Nativeboost, Athens, Roosal , Sockets and many more. > > If my free time holds and I do not run out of steam, I should be able to produce around 30 - 60 hours per year of Video Tutorials that will be able to document a ton of Pharo functionality. > > Already the Playlist is over an hour long and I try to keep my tutorials focused entirely on the practical side. > > Your comments and support is greatly appreciated.

April 27, 2014

Re: [Pharo-users] glorp

by Esteban A. Maringolo

2014-04-26 14:35 GMT-03:00 jtuchel(a)objektfabrik.de <jtuchel(a)objektfabrik.de>: > Sven, > > Am 25.04.14 22:44, schrieb Sven Van Caekenberghe: > > >> But one of his points was that ORM layers made SQL obsolete by hiding much >> of its power, the ability to do (query and other) processing on the DB. > > Hmm. I think what the article said was that you give up much of the power > and flexibility of SQL by using ORMs, but not that SQL was thereby > obsoleted. You give up on much of the power of SQL, but you also get a lot > of work done for you on the object side. > > Plus, you can always issue SQL statements to the database if you need to. Of > course you need to be aware that what you are doing could undermine the > bookkeeping of the ORM layer. Glorp, as an example, can also build very > sophisticated queries for object retrieval, like subqueries, outer joins and > whatnot. I am only slowly learning about the power that's buried in there. > So you can in fact use (a good portion of) the power of SQL in GLORP for > object lookup. And you can choose to bypass it for special cases where you > want to use SQL directly. You are wandering between two worlds then, but you > can if you need to. GLORP seems to have a really good model for suqueries, joins, and selective retrieval. Unfortunately I got bitten by a bug affecting the subselects[1], so I started my rant related with ORM/RDBMS in Pharo :) Esteban A. Maringolo [1] https://groups.google.com/forum/#!topic/glorp-group/OC0ly25IZPM

April 26, 2014

Video Tutorials about Pharo

by kilon alios

Hello pharoers . I have created a playlist in youtube where in the past few days I am keep adding new tutorials about the basics of Pharo. https://www.youtube.com/watch?v=Ol5ivaEATLQ&list=PLqbtQ7OkSta0ULYAd7Qdxof85… For now I am focusing on the vary basics. So far the tutorials are 1) Why Pharo -> Explaining why I love Pharo and what Pharo is. 2) Install Pharo 3) Create a Class 4) Workspace Variables 5) Instance Variables 6) Temporary Variables I try to keep the duration at most around 10 minutes , if I can around 3-4 minutes. My goals is to focus on one or two features per tutorial. My focus for now is explaining the basics of Pharo the Language and Pharo the IDE. I hope however that after that I will have the energy and time to focus on Pharo libraries, like Nativeboost, Athens, Roosal , Sockets and many more. If my free time holds and I do not run out of steam, I should be able to produce around 30 - 60 hours per year of Video Tutorials that will be able to document a ton of Pharo functionality. Already the Playlist is over an hour long and I try to keep my tutorials focused entirely on the practical side. Your comments and support is greatly appreciated.

April 26, 2014

Re: [Pharo-users] glorp

by jtuchel＠objektfabrik.de

Sven, Am 25.04.14 22:44, schrieb Sven Van Caekenberghe: > But one of his points was that ORM layers made SQL obsolete by hiding much of its power, the ability to do (query and other) processing on the DB. Hmm. I think what the article said was that you give up much of the power and flexibility of SQL by using ORMs, but not that SQL was thereby obsoleted. You give up on much of the power of SQL, but you also get a lot of work done for you on the object side. Plus, you can always issue SQL statements to the database if you need to. Of course you need to be aware that what you are doing could undermine the bookkeeping of the ORM layer. Glorp, as an example, can also build very sophisticated queries for object retrieval, like subqueries, outer joins and whatnot. I am only slowly learning about the power that's buried in there. So you can in fact use (a good portion of) the power of SQL in GLORP for object lookup. And you can choose to bypass it for special cases where you want to use SQL directly. You are wandering between two worlds then, but you can if you need to. > > BTW, I don't think there is such a thing as transparent persistency. > > I came to the same conclusion. The most transparent-y thing I can think of is saving an image. Of course there is no ACID in it. Maybe Gemstone is almost as close to it, but only as long as you are not using very large Collections and stuff, because then you need to program for it (even if it seems to be relatively straightforward). Joachim

April 26, 2014

Does something like or similiar to Redmine exist

by Friedrich Dominicus

for Smalltalk also? Thanks for your ideas Regards Friedrich

April 26, 2014

NativeBoost

by Markus Fritsche

Hello, tl;dr: what's the reason to get aNBExternalHandle even if you expect a MySuperHandle object from an nbCall? I am trying to build my first DLL wrapper with NativeBoost. I am having a problem that instead of returning a handle object (as I thought), my "primitive" throws NBExternalHandles at me. The API I am trying to wrap tries to be somewhat object oriented by (mostly) having a handle of some sort. My thinking was to attach all DLL primitives to the respective Handle Objects they take as a first parameter and go from there. Some workspace code: "Supplementary DLLs" Tm1ULibDllLibraryLoader loadLibrary. LibIbmCogEayLibraryLoader loadLibrary. SslIbmCogEayLibraryLoader loadLibrary. Log4CxxLibraryLoader loadLibrary. "DLL to wrap" TM1LibraryLoader loadTM1Library. t := TM1Api new. t tm1APIInitialize. hUser := t tm1SystemOpen. "Returns a proper 'TM1UHandle' object'" hUser tm1SystemAdminHostSet: 'localhost'. hPool1 := hUser tm1ValPoolCreate. "Returns NBExternalHandle" hPool1 inspect. hUser tm1SystemClose. t tm1APIFinalize. TM1Api>>#tm1SystemOpen <primitive: #primitiveNativeCall module: #NativeBoostPlugin> ^ self nbCall: #(TM1UHandle TM1SystemOpen(void)) TM1UHandle>>#tm1ValPoolCreate <primitive: #primitiveNativeCall module: #NativeBoostPlugin> ^ self nbCall: #(#TM1PHandle TM1ValPoolCreate ( TM1UHandle self ) ) Both, TM1UHandle class and TM1PHandle class have the method asNBExternalType: gen "use handle ivar to hold my instance (TM1x)" ^ NBExternalObjectType objectClass: self and are subclasses of object. What's my mistake? Can you tell with the information I provided? Best regards, Markus

April 26, 2014

Re: [Pharo-users] We need *you* for the upcoming Pharo's website

by kilon alios

Thank you Damien and Marcus . I was worried about my English, I am glad you find it easy to understand. Just added "How to install Pharo", following the suggestion of Esteban tried to keep it short so its 4 minutes. More are coming, I think I can do a 4 minute video per day. I have created my own playlist for teaching Pharo and I will create separate playing lists for Pharo Libraries each one in its own playlist. For now my focus is on Pharo basics (language and Ide ), then I will do libraries, Athens - Nativeboost - Roassal - Spec and so on. How to Install Pharo https://www.youtube.com/watch?v=3SXeUGK7xdY Pharo Video Tutorial ( Playlist ) https://www.youtube.com/watch?v=Ol5ivaEATLQ&list=PLqbtQ7OkSta0ULYAd7Qdxof85… On Fri, Apr 25, 2014 at 11:39 AM, Marcus Denker <marcus.denker(a)inria.fr>wrote: > > On 25 Apr 2014, at 10:35, Damien Cassou <damien.cassou(a)gmail.com> wrote: > > > Hi kilon, > > > > On Wed, Apr 23, 2014 at 9:32 PM, kilon alios <kilon.alios(a)gmail.com> > wrote: > >> Well I tried, several times , but I am not happy with the end result. > In any > >> case I am finished with this and since I promised to upload it here it > is > >> > >> https://www.youtube.com/watch?v=Ol5ivaEATLQ > > > > > > I love it, really. It shows plenty of useful stuff. You English is > > clear to me even if I'm no native speaker so that's a great bonus. > > > > Marcus, can we add that to the Pharo channel on youtube? > > > > I added it to the Pharo3 playlist: > > https://www.youtube.com/channel/UCp3mNigANqkesFzdm058bvw > > >

April 25, 2014