January 2015 - Pharo-dev - lists.pharo.org

Re: [Pharo-dev] The Smalltalk Renaissance Program

by Aaron Rosenzweig

Hi, The Squeak images tend to be more tuned towards grade-school education. In particular, âeToysâ sits on top of smalltalk and is perfect for young elementary school students to take their first steps in computer programming. My children went through the âwaveplaceâ video tutorials. They did the beta one which was more in depth and had like 30 videos if I remember correctly. Pharo is more âprofessional.â Not to say there is anything wrong with Squeak, it was used for DabbleDBâ¦ Itâs just that most developers donât want to see a mouse with eyeballs following your cursor when you first launch the image. You can remove that from the image, etc. but itâs that first feel. Overall Squeak seems like it blends in better in the classroom and Pharo suits developers more. Iâll probably be flamed for saying it but realize itâs a high level generalization. I know there is more going on underneath and I know that Pharo is the primary target for Seaside, etc. Both Squeak and Pharo are nice. AARON ROSENZWEIG / Chat 'n Bike e: aaron(a)chatnbike.com t: (301) 956-2319 On Jan 4, 2015, at 5:25 PM, horrido <horrido.hobbies(a)gmail.com> wrote: > I am intrigued. Where can I find more info about Smalltalk education in the > schools? I want to see what I can do in Canada. > > I presume there is a Smalltalk image customized for the classroom and aimed > at elementary school students. That's what I'm hoping for. > > > stepharo wrote >> ESUG is about the community. Without community then it is terrible. >> We set up also a program for teachers. Now in the US there is nearly >> nobody teaching smalltalk and this is a pity. > > > > > > -- > View this message in context: http://forum.world.st/The-Smalltalk-Renaissance-Program-tp4797112p4797760.h… > Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com. >

Jan. 4, 2015

Charting graphs

by Alexandre Bergel

Hi! RTGraphBuilder went through major improvements. - min and max may be specified. - plugins to add some decoration (average line, standard deviation range, ticks lines, â¦) Here are some examples, with some examples, which should illustrate these points: Is obtained with: -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= | b ds | b := RTGrapherBuilder new. ds := RTDataSet new. ds points: (0 to: 100 by: 0.1). ds y: [ :x | (0.1 * x) sin ]. ds noDot. ds interaction popupText: 'sinus'. ds connectColor: Color blue. b add: ds. ds := RTDataSet new. ds points: (0 to: 100 by: 0.1). ds y: [ :x | (0.2 * x) cos * 2 ]. ds noDot. ds interaction popupText: 'cosinus'. ds connectColor: Color red. b add: ds. b minY: -4. b maxY: 4. b minX: -25. b build. -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= b := RTGrapherBuilder new. ds := RTStackedDataSet new. ds interaction popup. ds points: #(600 470 170 430 300). ds barShape width: 20; color: Color lightGreen. b add: ds. b axisX noLabel; noTick. b axisY noDecimals. b addPlugin: RTMeanDevVarPlugin new. b build -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= Another example: -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= b := RTGrapherBuilder new. b extent: 300 @ 200. 5 timesRepeat: [ ds := RTStackedDataSet new. ds noDot. ds points: ((1 to: 500) collect: [ :i | 50 atRandom - 25 ]) cumsum. ds connectColor: Color green. b add: ds. ]. b addPlugin: RTMeanDevVarPlugin new. b build. -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= -=-=-=-=-=-= The plugin framework exposes to a plugin all the necessary to define a whole range of decorations. For example, variable average lines, linear regression should be trivial to add... Happy new year! Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

Jan. 4, 2015

Re: [Pharo-dev] Object>>ifNilOrEmpty: aBlock

by Benoit St-Jean

In Object, it should return false, not self! Â ----------------- Benoit St-Jean Yahoo! Messenger: bstjean Twitter: @BenLeChialeux Pinterest: benoitstjean IRC: lamneth Blogue: endormitoire.wordpress.com "A standpoint is an intellectual horizon of radius zero".Â (A. Einstein) From: Sebastian Sastre <sebastian(a)flowingconcept.com> To: Benoit St-Jean <bstjean(a)yahoo.com>; Pharo Development List <pharo-dev(a)lists.pharo.org> Sent: Sunday, January 4, 2015 6:06 PM Subject: Re: [Pharo-dev] Object>>ifNilOrEmpty: aBlock but not putting it on Object would change the feature since you do want it returning self on that case. But from your comment we can take the idea of adding it in Object, UndefinedObject and Collection and it will be a faster implementation since it will be trivial for the three of them, no? On Jan 4, 2015, at 8:40 PM, Benoit St-Jean <bstjean(a)yahoo.com> wrote: A cleaner implementation would be to define this method in UndefinedObject and Collection only.Â It should not appear in Object, the same way #isEmptyOrNil is defined. Â ----------------- Benoit St-Jean Yahoo! Messenger: bstjean Twitter: @BenLeChialeux Pinterest: benoitstjean IRC: lamneth Blogue: endormitoire.wordpress.com "A standpoint is an intellectual horizon of radius zero".Â (A. Einstein) From: Sebastian Sastre <sebastian(a)flowingconcept.com> To: Pharo Development List <pharo-dev(a)lists.pharo.org> Sent: Sunday, January 4, 2015 5:27 PM Subject: [Pharo-dev] Object>>ifNilOrEmpty: aBlock Hi guys, Iâve started to use this little one: Object>>ifNilOrEmpty: aBlock Â Â Â self ifNil: [ ^ aBlock value ]. Â Â Â Â Â Â (self isCollection and: [ Â Â Â self isEmpty ]) ifTrue: [ ^ aBlock value ]. Â Â Â ^ self. It allows you to do the widely known JavaScript one-liner: var stuff = this.thing || âsome default value for when this.thing is undefined, null or an empty stringâ. but in smalltalk in this way: stuff := self thing ifNilOrEmpty: [ âsome default value for when self thing is nil or an empty stringâ ] simple thing feels practical and nice :)

Jan. 4, 2015

Re: [Pharo-dev] Object>>ifNilOrEmpty: aBlock

by Sebastian Sastre

but not putting it on Object would change the feature since you do want it returning self on that case. But from your comment we can take the idea of adding it in Object, UndefinedObject and Collection and it will be a faster implementation since it will be trivial for the three of them, no? > On Jan 4, 2015, at 8:40 PM, Benoit St-Jean <bstjean(a)yahoo.com> wrote: > > A cleaner implementation would be to define this method in UndefinedObject and Collection only. It should not appear in Object, the same way #isEmptyOrNil is defined. > > ----------------- > Benoit St-Jean > Yahoo! Messenger: bstjean > Twitter: @BenLeChialeux > Pinterest: benoitstjean > IRC: lamneth > Blogue: endormitoire.wordpress.com > > "A standpoint is an intellectual horizon of radius zero". (A. Einstein) > > From: Sebastian Sastre <sebastian(a)flowingconcept.com> > To: Pharo Development List <pharo-dev(a)lists.pharo.org> > Sent: Sunday, January 4, 2015 5:27 PM > Subject: [Pharo-dev] Object>>ifNilOrEmpty: aBlock > > Hi guys, > > Iâve started to use this little one: > > Object>>ifNilOrEmpty: aBlock > > self ifNil: [ ^ aBlock value ]. > > (self isCollection and: [ > self isEmpty ]) ifTrue: [ ^ aBlock value ]. > > ^ self. > > > It allows you to do the widely known JavaScript one-liner: > > var stuff = this.thing || âsome default value for when this.thing is undefined, null or an empty stringâ. > > but in smalltalk in this way: > > stuff := self thing ifNilOrEmpty: [ âsome default value for when self thing is nil or an empty stringâ ] > > simple thing feels practical and nice :) > > >

Jan. 4, 2015

Re: [Pharo-dev] Object>>ifNilOrEmpty: aBlock

by Benoit St-Jean

A cleaner implementation would be to define this method in UndefinedObject and Collection only.Â It should not appear in Object, the same way #isEmptyOrNil is defined. Â ----------------- Benoit St-Jean Yahoo! Messenger: bstjean Twitter: @BenLeChialeux Pinterest: benoitstjean IRC: lamneth Blogue: endormitoire.wordpress.com "A standpoint is an intellectual horizon of radius zero".Â (A. Einstein) From: Sebastian Sastre <sebastian(a)flowingconcept.com> To: Pharo Development List <pharo-dev(a)lists.pharo.org> Sent: Sunday, January 4, 2015 5:27 PM Subject: [Pharo-dev] Object>>ifNilOrEmpty: aBlock Hi guys, Iâve started to use this little one: Object>>ifNilOrEmpty: aBlock Â Â Â self ifNil: [ ^ aBlock value ]. Â Â Â Â Â Â (self isCollection and: [ Â Â Â self isEmpty ]) ifTrue: [ ^ aBlock value ]. Â Â Â ^ self. It allows you to do the widely known JavaScript one-liner: var stuff = this.thing || âsome default value for when this.thing is undefined, null or an empty stringâ. but in smalltalk in this way: stuff := self thing ifNilOrEmpty: [ âsome default value for when self thing is nil or an empty stringâ ] simple thing feels practical and nice :)

Jan. 4, 2015

Object>>ifNilOrEmpty: aBlock

by Sebastian Sastre

Hi guys, Iâve started to use this little one: Object>>ifNilOrEmpty: aBlock self ifNil: [ ^ aBlock value ]. (self isCollection and: [ self isEmpty ]) ifTrue: [ ^ aBlock value ]. ^ self. It allows you to do the widely known JavaScript one-liner: var stuff = this.thing || âsome default value for when this.thing is undefined, null or an empty stringâ. but in smalltalk in this way: stuff := self thing ifNilOrEmpty: [ âsome default value for when self thing is nil or an empty stringâ ] simple thing feels practical and nice :)

Jan. 4, 2015

Re: [Pharo-dev] The Smalltalk Renaissance Program

by horrido

I am intrigued. Where can I find more info about Smalltalk education in the schools? I want to see what I can do in Canada. I presume there is a Smalltalk image customized for the classroom and aimed at elementary school students. That's what I'm hoping for. stepharo wrote > ESUG is about the community. Without community then it is terrible. > We set up also a program for teachers. Now in the US there is nearly > nobody teaching smalltalk and this is a pity. -- View this message in context: http://forum.world.st/The-Smalltalk-Renaissance-Program-tp4797112p4797760.h… Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

Jan. 4, 2015

Wrapping RegQueryValueExA in NativeBoost

by Torsten Bergmann

Hi, Happy new year! I try to wrap some API methods using NativeBoost to access Win32 Registry and broaden the Pharo support for Windows. Currently I'm already able to - create registry keys (RegCreateKeyA API) - open registry keys (RegOpenKeyExA API) - delete registry keys (RegDeleteKeyA API) - close registry key handles (RegCloseKey API) Now I additionally want to query some keys using the "RegQueryValueExA" API (http://msdn.microsoft.com/en-us/library/windows/desktop/ms724911%28v=vs.85%…) As I tried an example in an elder Smalltalk/MT first (see attached) I know it is working from the Win32 API side. My NativeBoost definition in Pharo for wrapping the function looks like this (similar to MSDN): regQueryValueExA: hKey with: lpValueName with: lpReserved with: lpType with: lpData with: lpcbData <primitive: 'primitiveNativeCall' module: 'NativeBoostPlugin'> ^ self nbCall: #(LONG RegQueryValueExA( HKEY hKey, LPCTSTR lpValueName, LPDWORD lpReserved, LPDWORD lpType, LPBYTE lpData, LPDWORD lpcbData)) module: #advapi32 But when I call it I get a "Generic error" thrown by NB and independent how hard I try I can not get this call to work in NativeBoost. I checked all arguments, checked the type definitions (pool WinTypes which is similar to NBWinTypes), played with options, ... but was not able to find out what I'm doing wrong in Pharo. Meanwhile after investing several days of my spare time it looks like I cant "see the wood because of all the trees". I would really appreciate if someone with enough knowledge of NativeBoost could have a second look to point my into the right direction. To reproduce: ============= - use a fresh Pharo4.0 Latest update: #40428 - open World menu -> Configuration Browser and load "OSWindows" project - go to class WinRegistry - there is the NativeBoost API definition in method #regQueryValueExA:with:with:with:with:with: - and a method #example2 that calls this in a similar way as in my Smalltalk/MT example (if you try this example you get the "Generic error") Many thanks in advance! Bye T.

Jan. 4, 2015

Re: [Pharo-dev] My New Year present to Pharo

by horrido

I'm also looking for a logo image to represent Smalltalk Renaissance. In fact, this should be a higher priority. Thanks. horrido wrote > If any of you would care to submit artwork to the SRP, I would be most > appreciative. In particular, I'm looking for a series of full-page > magazine ads that "sell" the idea of smalltalk, and "sell" the benefits of > Smalltalk technology to the enterprise. Of course, as public ads, you > should endeavour to keep the message simple and on point; you only have a > matter of seconds to attract the attention of readers and if your message > is too complicated, they will skip it. Thanks. -- View this message in context: http://forum.world.st/My-New-Year-present-to-Pharo-tp4797728p4797754.html Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

Jan. 4, 2015

Re: [Pharo-dev] My New Year present to Pharo

by kilon alios

wow very impressive indeed. My father was a captain on commercial ships and I had my fight with waves when I was very young , although nowhere near the wave heights in this video. Now I am lucky enough to live kms from the sea. My full nickname "kilon alios" , "alios" in ancient greek means the one that comes from the sea. So as you can imagine I love the sea very much which is not rare for a Greek anyway, so its natural for me to love lighthouses too :) Actually my image has several metaphors for Pharo and what I think about it , what it makes it tick for me, but I will let people discover them themselves and interpret the image as they seem fit . Afterall art is a very personal and so is coding . On Sun, Jan 4, 2015 at 8:19 PM, stepharo <stepharo(a)free.fr> wrote: > Thanks! > > I do not know if you know but I think that the following real tempest that > hit france some years ago show why we love our logo :) > > http://files.pharo.org/media/tempest.mp4 > > > Happy new year pharoers , I wish health and hapiness to all of you . > > Secretly these past few month I have been working on a 3d graphics > wallpaper for Pharo. Finally I manage to create something worthy for Pharo > which I present now to you > > > This an actual lighthouse which is located in the Greek island of > Andros. Its small, elegant and beautiful like Pharo ;) > > More info can be found here > > > http://www.amazingplacesonearth.com/tourlitis-lighthouse-andros-island-gree… > > I release this image under CC license , you are welcome to use it > anywhere you like as long as you credit me and even in commercial projects > , completely free . You can also modify and redistribute it in any way > again as long as you credit me. > > I hope you like it , I definitely had fun creating it :) > > PS: I also added it as attachment in case the inlining does not work > â > > >

Jan. 4, 2015