February 2012 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] keeping up with lively-kernel (morphic)

by StÃ©phane Ducasse

On Feb 1, 2012, at 11:27 PM, Lawson English wrote: > Does Pharo use Morphic? Is there a conscious decision on people's parts to NOT try and keep the various flavors of Morphic compatible, or is it just "too hard," or that people don't care, or think it irrelevant? > > Some graphical frameworks manage to keep a centralized core of classes because they are created by one group of people for one language and then bindings ported to other languages. Morphic is unique in that it is being [re]implemented in 3 different languages: Self, Smalltalk (with several variations within that branch) and JavaScript. Is there any way, or even desire, to coordinate between the differing versions? are you serious? Please can we continue to build our future instead of talking about the one of others? Stef

Feb. 2, 2012

Re: [Pharo-project] Building a developer community

by Herby VojÄÃk

Hi, wouldn't linking directly to thank you page which refreshes to downloaded file (as in sourceforge) be safer? It can show "download should start asap" for first three seconds and then show the "Thank you" content if you want it so, but download should start in any circumstances (you can even put the "if download did not start, click here" there if you want to be sure). Herby Max Leske wrote: > Hi Laurent > > I've found a way to simulate what you suggested. Here's what you do: > > Instead of inserting a link element into the page, you insert a code > element, make it executable and then paste this code into the code editor: > > <script type="text/javascript"> > /*<![CDATA[*/ > function thanks() { > window.setTimeout(function(){ > window.open("++path/to/thankyoupage (from site root)++", "_self")}, > 3000 > ); > } > /*]]>*/ > </script> > > <a title="download" class="open" href="++URL to download++" > onclick="thanks()">++Download now!++</a> > > This will trigger the download on click and will then redirect to the > thank you page (replace stuff inside ++ ++). Note however, that I had to > use an arbitrary delay of three seconds since the download will not > start if the response for the thank you page returns earlier than the > one to the download. That means, that it is possible for the thank you > page to be displayed without the download ever having happened. > > Be sure to make the thank you page hidden, so that it doesn't appear in > the menu. > > Hit me up again if you have any questions. > > BTW: I'll see if we can make this kind of redirect an actual feature in > cmsbox. I like the idea but it's much too complicated for the user to do > at the moment. > > Cheers, > Max > > > On 02.02.2012, at 10:08, laurent laffont wrote: > >> http://www.slideshare.net/kohsuke/building-developer-community >> >> Slide 9 looks interesting (Thank you for downloading page). How can I >> do that with cmsbox / pharo website ? >> >> Laurent Laffont >

Feb. 2, 2012

Re: [Pharo-project] Help with GOODS DB

by Max Leske

Hi Alain We use GOODS here. I could try to help. What do you need to know? Cheers, Max On 02.02.2012, at 17:11, Mariano Martinez Peck wrote: > > > On Wed, Feb 1, 2012 at 4:50 PM, Alain Gonzalez <alaincrx26(a)gmail.com> wrote: > Dear Mariano, > I have come across your blog where you talk about GOODS database and I'm interested to know if you could help in a task that I've been assigned to do. > > Hi Alain. Unfortunatly, I have never really played with GOODS, so much less trying to compile it. > Since I cannot help you, at least I forward this email to the mailing list and hopefully someone will do it. > > Good luck! > > > I recently graduated from FIU (Computer Science bachelor's degree) and I started applying for jobs and I had an interview where they want me to do a task. > The task consists of connecting a c++ program to a database called GOODS (General Object Oriented Database System) I have already developed the GUI part of the task but I'm having trouble compiling a simple program that connects to GOODS because visual studios gives me all types of errors. Is it possible that you could help me with this? > > I will really appreciate any help you can give me in this task. > > Thank you in advance > Alain Gonzalez > Phone: 786-205-1628 > Email: alaincrx26(a)gmail.com > > > > > > -- > Mariano > http://marianopeck.wordpress.com >

Feb. 2, 2012

[Pharo-project] where is the config?

by Camillo Bruni

is there somewhere in a hidden place a ConfigurationOfRB? if yes why is it not in http://squeaksource.com/rb? best cami

Feb. 2, 2012

Re: [Pharo-project] Boolean Logic

by Peter Hugosson-Miller

Because to calculate the result, the block must always be evaluated, so it's a bit redundant. -- Cheers, Peter. On 2 feb 2012, at 17:08, Robert Sirois <watchlala(a)hotmail.com> wrote: > Ok, this may be from a simple lack of understanding, but I just have to know ;) > > Why can I call #or: (Boolean and friends) with a block, but #xor: only takes a Boolean? I would think the paradigm would remain the same and be able to compose operators like #or:, etc.? > > What am I missing? Thanks! > > RS

Feb. 2, 2012

Re: [Pharo-project] Help with GOODS DB

by Mariano Martinez Peck

On Wed, Feb 1, 2012 at 4:50 PM, Alain Gonzalez <alaincrx26(a)gmail.com> wrote: > Dear Mariano, > I have come across your blog where you talk about GOODS database and I'm > interested to know if you could help in a task that I've been assigned to > do. > Hi Alain. Unfortunatly, I have never really played with GOODS, so much less trying to compile it. Since I cannot help you, at least I forward this email to the mailing list and hopefully someone will do it. Good luck! > > I recently graduated from FIU (Computer Science bachelor's degree) and I > started applying for jobs and I had an interview where they want me to do a > task. > The task consists of connecting a c++ program to a database called GOODS > (General Object Oriented Database System) I have already developed the GUI > part of the task but I'm having trouble compiling a simple program that > connects to GOODS because visual studios gives me all types of errors. Is > it possible that you could help me with this? > > I will really appreciate any help you can give me in this task. > > Thank you in advance > Alain Gonzalez > Phone: 786-205-1628 > Email: alaincrx26(a)gmail.com > > > -- Mariano http://marianopeck.wordpress.com

Feb. 2, 2012

[Pharo-project] Boolean Logic

by Robert Sirois

Ok, this may be from a simple lack of understanding, but I just have to know ;) Why can I call #or: (Boolean and friends) with a block, but #xor: only takes a Boolean? I would think the paradigm would remain the same and be able to compose operators like #or:, etc.? What am I missing? Thanks! RS

Feb. 2, 2012

Re: [Pharo-project] Building a developer community

by laurent laffont

Thank you. May be some people want to join on Pharo sprint at FOSDEM to improve the "getting started with Pharo experience" Laurent On Thu, Feb 2, 2012 at 4:09 PM, Max Leske <maxleske(a)gmail.com> wrote: > Hi Laurent > > I've found a way to simulate what you suggested. Here's what you do: > > Instead of inserting a link element into the page, you insert a code > element, make it executable and then paste this code into the code editor: > > <script type="text/javascript"> > /*<![CDATA[*/ > function thanks() { > window.setTimeout(function(){ > window.open("++path/to/thankyoupage (from site root)++", "_self")}, > 3000 > ); > } > /*]]>*/ > </script> > > <a title="download" class="open" href="++URL to download++" > onclick="thanks()">++Download now!++</a> > > This will trigger the download on click and will then redirect to the > thank you page (replace stuff inside ++ ++). Note however, that I had to > use an arbitrary delay of three seconds since the download will not start > if the response for the thank you page returns earlier than the one to the > download. That means, that it is possible for the thank you page to be > displayed without the download ever having happened. > > Be sure to make the thank you page hidden, so that it doesn't appear in > the menu. > > Hit me up again if you have any questions. > > BTW: I'll see if we can make this kind of redirect an actual feature in > cmsbox. I like the idea but it's much too complicated for the user to do at > the moment. > > Cheers, > Max > > > On 02.02.2012, at 10:08, laurent laffont wrote: > > http://www.slideshare.net/kohsuke/building-developer-community > > Slide 9 looks interesting (Thank you for downloading page). How can I do > that with cmsbox / pharo website ? > > Laurent Laffont > > >

Feb. 2, 2012

Re: [Pharo-project] Building a developer community

by Max Leske

Hi Laurent I've found a way to simulate what you suggested. Here's what you do: Instead of inserting a link element into the page, you insert a code element, make it executable and then paste this code into the code editor: <script type="text/javascript"> /*<![CDATA[*/ function thanks() { window.setTimeout(function(){ window.open("++path/to/thankyoupage (from site root)++", "_self")}, 3000 ); } /*]]>*/ </script> <a title="download" class="open" href="++URL to download++" onclick="thanks()">++Download now!++</a> This will trigger the download on click and will then redirect to the thank you page (replace stuff inside ++ ++). Note however, that I had to use an arbitrary delay of three seconds since the download will not start if the response for the thank you page returns earlier than the one to the download. That means, that it is possible for the thank you page to be displayed without the download ever having happened. Be sure to make the thank you page hidden, so that it doesn't appear in the menu. Hit me up again if you have any questions. BTW: I'll see if we can make this kind of redirect an actual feature in cmsbox. I like the idea but it's much too complicated for the user to do at the moment. Cheers, Max On 02.02.2012, at 10:08, laurent laffont wrote: > http://www.slideshare.net/kohsuke/building-developer-community > > Slide 9 looks interesting (Thank you for downloading page). How can I do that with cmsbox / pharo website ? > > Laurent Laffont

Feb. 2, 2012

Re: [Pharo-project] Question regarding LinkedList collect:

by Nicolas Cellier

Sure, but this leaves plenty of room to Andreas for improving LinkedList. For example, collect: has been improved, but what about select: ? { [(Array withAll: (1 to: 1000)) select: [:e | e even]] bench. [(LinkedList withAll: (1 to: 1000)) select: [:e | e even]] bench. }. -> #('7,240 per second.' '64.3 per second.') Also, tell why ((1 to: 10) as: LinkedList) isEmpty, or correct it... Your contributions are welcome, via http://www.pharo-project.org/community/issue-tracking (I hope the page is up to date). Nicolas 2012/2/2 Ben Coman <btc(a)openinworld.com>: > Henrik Johansen wrote: >> >> On Feb 2, 2012, at 10:34 AM, Andreas Haufler (scireum GmbH) wrote: >> >> >>> >>> Hi everyone, >>> >>> I'm a Pharo newbie with some knowledge about Smalltalk. Surfing through >>> the code base I stumbled over the implementation of LinkedList collect: - >>> Your're right, there is none, it's inherited by SequenceableCollection. >>> Looking through this code, I discovered that it builds a LinkedList of the >>> same size and then uses the at: and at:put: selector to copy the transformed >>> values form the first list to the second. >>> >>> Knowing that at: and at:put: have O(n) complexity for linked lists, this >>> makes collect: an O(n^2) operation. On the other hand, this could easily >>> changed into O(n) by implementing collect: for LinkedList: >>> >>> collect: aBlock Â Â Â Â "Evaluate aBlock with each of the receiver's >>> elements as the argument. Â Â Â Â Â Collect the resulting values into a >>> collection like the receiver. Answer Â Â Â Â the new collection." >>> >>> Â Â Â Â | newCollection | >>> Â Â Â Â newCollection := self species new. >>> Â Â Â Â self do: >>> Â Â Â Â Â Â Â Â [:val | >>> Â Â Â Â Â Â Â Â newCollection add: (aBlock value: val)]. >>> Â Â Â Â ^ newCollection >>> >>> I profiled this using: >>> x := LinkedList new. >>> 1 to: 10000 do: [:n |x add: n]. >>> TimeProfileBrowser onBlock: [ x collect: [:i | i] ] >>> >>> and saw a improvement of: 795msec (old) vs. 6msec (new). >>> >>> I wonder therefore, if LinkedList is just seldomly used (in Java i.e. >>> nearly all lists use ArrayList nowadays)? Or would the system benefit from >>> this improvement? I could then look through the other methods >>> (collect:from:to: et. al.) and provide a patch. >>> >>> >>> best regards + thank's for creating such a beautiful system >>> Andreas Haufler >>> >> >> >> It does suffer from being a subclass of SequenceableCollection where >> default implementations assume O(1) at: and at:put: implementationsâ¦ >> You're right it's not often used (at least not polymorphical to normal >> collections), and as such it's a tradeoff between keeping the implementation >> small (by using slow, but working super implementations), and reimplementing >> methods efficiently. >> >> In this case though, it seems Alain already noticed, and collect: has >> already been reimplemented efficiently in 1.4 >> >> Cheers, >> Henry >> >> > > Henrik, > Please note that I've only picked this as an example since it occurred > coincidently with my having just read the insightful slides of the > "[Pharo-project] Building a developer community" thread - but in light of > that... > > While your answer was good technically, it was not as good as it could be > for "building Pharo's developer community". Â Here a "visitor" with > reasonable Smalltalk ability extended a helping hand. Â The response returned > was a polite "we are doing good on our own thanks" - which is fine except > except it does not draw them in. Â An alternative might have included "its > already been done but come and have a look at it. Â It would be great if you > could help out with (other stuff)" > > Now some disclaimers... > * I did stretch the example since Alain is a third party whom you can't just > throw Andreas at unannounced. > * There has been little time for anyone else to answer > * I don't mean to posts should be constrained by kid gloves. > > Hopefully though this is a useful perspective to mix in with everything else > important. > warm regards, > Ben >

Feb. 2, 2012