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

Re: [Pharo-users] Becoming proficient in Pharo

by nacho

Ben, How do you actually use the halt method? I don't follow you. Seems like an interesting thing to explore. thanks Nacho ----- Nacho Smalltalker apprentice. Buenos Aires, Argentina. -- View this message in context: http://forum.world.st/Becoming-proficient-in-Pharo-tp4799284p4799495.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Jan. 14, 2015

New post on blog about Rewrite Tool

by Mark Rizun

Hello! Please, visit my blog and read new information about developement and updates for Rewrite Tool. Link: myfuncoding.blogspot.com You can install the tool by evaluating this: Gofer new url: 'http://smalltalkhub.com/mc/MarkRizun/RewriteTool/main'; package: 'ConfigurationOfRewriteTool'; load. (Smalltalk at: #ConfigurationOfRewriteTool) loadDevelopment or from my repo on SmalltalkHub: http://smalltalkhub.com/#!/~MarkRizun/RewriteTool Here is a link for Pharo For Enterprise chapter about Rewrite Tool: https://github.com/SquareBracketAssociates/PharoForTheEnterprise-english/tr… Unfortunately, it's not finished yet at all, but it will be :) Any critics and suggestions are welcome ! Best, Mark -- View this message in context: http://forum.world.st/New-post-on-blog-about-Rewrite-Tool-tp4799491.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Jan. 14, 2015

Re: [Pharo-users] SmalltalkHub.com <- Flakey?

by kilon alios

Smalltalk hub has its good and bad moments, I have been experiencing weird behaviour from time to time On Wed, Jan 14, 2015 at 11:22 AM, Ben Coman <btc(a)openinworld.com> wrote: > no problem here. > > On Wed, Jan 14, 2015 at 12:55 PM, sergio_101 <sergio.rrd(a)gmail.com> wrote: > >> Is the smalltalk hub site really flakey lately, or is it just me? >> >> i am having problems loading pages, loading projects, etc.. >> >> code seems to be uploading okay, though. >> > >

Jan. 14, 2015

Re: [Pharo-users] SmalltalkHub.com <- Flakey?

by Ben Coman

no problem here. On Wed, Jan 14, 2015 at 12:55 PM, sergio_101 <sergio.rrd(a)gmail.com> wrote: > Is the smalltalk hub site really flakey lately, or is it just me? > > i am having problems loading pages, loading projects, etc.. > > code seems to be uploading okay, though. >

Jan. 14, 2015

SmalltalkHub.com <- Flakey?

by sergio_101

Is the smalltalk hub site really flakey lately, or is it just me? i am having problems loading pages, loading projects, etc.. code seems to be uploading okay, though.

Jan. 14, 2015

FullCalendar on JQueryWidgetBox not work

by Oswall Verny Arguedas C.

Regards, I use Seaside 3.1,Â Pharo 3.0, Â on Ubuntu 14.04.I need to use fullcalendar onÂ JQWidgetBoxÂ but does not work. When I try to access it with url: Â Â Â http://localhost:9090/jquery-widgets/fullcalendar Error message is: MessageNotUnderstood: Â receiver of "encodeCollection:on:" is nil Thanks for the support OswallÂ

Jan. 14, 2015

Re: [Pharo-users] Capturing a stream

by Demian Schkolnik

Hello everyone. Thank you Juampi & Ben for your answers. This is the final working code, made with Johan's help: * | process output thread |* * thread := [process := (PipeableOSProcess command: 'rostopic echo /turtle1/cmd_vel __name:=echo2') ] fork. * * (Delay forSeconds:3) wait.* * (OSProcess command: 'rostopic pub -1 /turtle1/cmd_vel geometry_msgs/Twist -- ''[3.0, 0.0, 0.0]'' ''[0.0, 0.0, 1.5]'' ').* * (Delay forSeconds:3) wait.* * output := process upToEnd.* Now we have everything in output. It only remains to kill the thread now. Thank you all for the help! El Tue Jan 13 2015 at 5:53:26 PM, Juan Pablo Sandoval Alcocer < juampiboy(a)gmail.com> escribiÃ³: > Hi Demian, > > I am not sure if I understood well your questions, but maybe you can try > something like: > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > MyWriteStream>>nextPutAll: content > Transcript show: content. > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > > and then execute: > > [(PipeableOSProcess command:'sh /Users/jsandova/workspace/test.sh') > outputOn: (MyWriteStream with: Array new)] fork. > > Regards, > Juampi > > 2015-01-13 12:47 GMT-03:00 Ben Coman <btc(a)openinworld.com>: > > So you mean 'rostopic echo' and 'rostopic pub' ? So its a >> publisher/subscriber model with 'echo' as the subscriber ? >> >> (I'll needs others to confirm this is possible but...) the way to go may >> be to fork 'rotopic echo' and leave it running, parsing its results into a >> queue that some other part of your program consumes. >> >> To simplify this to check feasibility, I'd start with a single shell >> script outputting text at intervals like this... >> "test.sh" >> for VARIABLE in 1 2 3 4 5 .. N >> do >> echo $VARIABLE >> sleep 2 >> done >> >> >> and in Pharo, assuming you can process the output stream asynchronously, >> every time you receive a newline, open an inspector showing the line just >> received. But sorry I don't know *PipeableOSProcess enough to know how.* >> >> *cheers -ben* >> >> >> On Tue, Jan 13, 2015 at 11:05 PM, Demian Schkolnik < >> demianschkolnik(a)gmail.com> wrote: >> >>> It is actually not a native linux command, but rather something >>> belonging to ROS (Robot Robot Operating System). I did not want to >>> complicate the question further.. The behaviour is as I described it. This >>> echo command sits still in the console where it was called, and waits. When >>> some message is send, then it just prints the message on screen and waits. >>> The pub method (also belonging to ROS) publishes a message and exits. >>> I tried Ben's solution (thanks!), but unfortunately stringVar remains >>> nil. I think the problem is we are assigning the output of the command to >>> stringVar, which is nothing, at the moment. >>> Any ideas? >>> Thank you all. >>> >>> El Tue Jan 13 2015 at 6:15:01, Ben Coman <btc(a)openinworld.com> escribiÃ³: >>> >>> I've never known 'echo' to wait for input, and haven't heard of this >>>> echo & pub combination. Do you have some link to a tutorial showing how >>>> they are used? >>>> >>>> However just wildly guessing, are you wanting to get output from a long >>>> running command without blocking the Pharo UI? >>>> In that case, what about... >>>> [ *stringVar := (PipeableOSProcess command: 'echo...') output ] >>>> fork. * >>>> *?* >>>> *cheers -ben* >>>> >>>> On Tue, Jan 13, 2015 at 9:18 AM, Demian Schkolnik < >>>> demianschkolnik(a)gmail.com> wrote: >>>> >>>>> Hello everyone. >>>>> >>>>> I have the following question. I have a specific 'echo ...' command, >>>>> which I send to the linux console via " OSProcess command:'echo ... ' ". >>>>> This echo command, when executed on the native linux console, stands >>>>> by until it receives some message. >>>>> Following this, I have to execute a 'pub...' command, which gives some >>>>> information that the echo command will print on screen. On linux, you run >>>>> 'echo..' on a terminal and 'pub...' on another. >>>>> My objective here is to capture the output of echo into a smalltalk >>>>> variable for later use. >>>>> Normally, if a console command prints something immediately to screen, >>>>> I use >>>>> *(PipeableOSProcess command:'some command') output.* >>>>> >>>>> It is here a little different though, since this command will not >>>>> print something immediately to screen. I want to do something like this, >>>>> where the final output of 'echo..' stays in stringVar. >>>>> >>>>> *stringVar := (PipeableOSProcess command: 'echo...') output. * >>>>> *(Delay forSeconds:3) wait.* >>>>> *(OSProcess command: 'pub... ').* >>>>> *(Delay forSeconds:3) wait.* >>>>> >>>>> Thank you all. >>>>> >>>>> >>>>> >>>>> >>>> >> > > > -- > Saludos, > Juan Pablo >

Jan. 13, 2015

Re: [Pharo-users] Capturing a stream

by Juan Pablo Sandoval Alcocer

Hi Demian, I am not sure if I understood well your questions, but maybe you can try something like: -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= MyWriteStream>>nextPutAll: content Transcript show: content. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- and then execute: [(PipeableOSProcess command:'sh /Users/jsandova/workspace/test.sh') outputOn: (MyWriteStream with: Array new)] fork. Regards, Juampi 2015-01-13 12:47 GMT-03:00 Ben Coman <btc(a)openinworld.com>: > So you mean 'rostopic echo' and 'rostopic pub' ? So its a > publisher/subscriber model with 'echo' as the subscriber ? > > (I'll needs others to confirm this is possible but...) the way to go may > be to fork 'rotopic echo' and leave it running, parsing its results into a > queue that some other part of your program consumes. > > To simplify this to check feasibility, I'd start with a single shell > script outputting text at intervals like this... > "test.sh" > for VARIABLE in 1 2 3 4 5 .. N > do > echo $VARIABLE > sleep 2 > done > > > and in Pharo, assuming you can process the output stream asynchronously, > every time you receive a newline, open an inspector showing the line just > received. But sorry I don't know *PipeableOSProcess enough to know how.* > > *cheers -ben* > > > On Tue, Jan 13, 2015 at 11:05 PM, Demian Schkolnik < > demianschkolnik(a)gmail.com> wrote: > >> It is actually not a native linux command, but rather something belonging >> to ROS (Robot Robot Operating System). I did not want to complicate the >> question further.. The behaviour is as I described it. This echo command >> sits still in the console where it was called, and waits. When some message >> is send, then it just prints the message on screen and waits. The pub >> method (also belonging to ROS) publishes a message and exits. >> I tried Ben's solution (thanks!), but unfortunately stringVar remains >> nil. I think the problem is we are assigning the output of the command to >> stringVar, which is nothing, at the moment. >> Any ideas? >> Thank you all. >> >> El Tue Jan 13 2015 at 6:15:01, Ben Coman <btc(a)openinworld.com> escribiÃ³: >> >> I've never known 'echo' to wait for input, and haven't heard of this echo >>> & pub combination. Do you have some link to a tutorial showing how they >>> are used? >>> >>> However just wildly guessing, are you wanting to get output from a long >>> running command without blocking the Pharo UI? >>> In that case, what about... >>> [ *stringVar := (PipeableOSProcess command: 'echo...') output ] >>> fork. * >>> *?* >>> *cheers -ben* >>> >>> On Tue, Jan 13, 2015 at 9:18 AM, Demian Schkolnik < >>> demianschkolnik(a)gmail.com> wrote: >>> >>>> Hello everyone. >>>> >>>> I have the following question. I have a specific 'echo ...' command, >>>> which I send to the linux console via " OSProcess command:'echo ... ' ". >>>> This echo command, when executed on the native linux console, stands by >>>> until it receives some message. >>>> Following this, I have to execute a 'pub...' command, which gives some >>>> information that the echo command will print on screen. On linux, you run >>>> 'echo..' on a terminal and 'pub...' on another. >>>> My objective here is to capture the output of echo into a smalltalk >>>> variable for later use. >>>> Normally, if a console command prints something immediately to screen, >>>> I use >>>> *(PipeableOSProcess command:'some command') output.* >>>> >>>> It is here a little different though, since this command will not print >>>> something immediately to screen. I want to do something like this, where >>>> the final output of 'echo..' stays in stringVar. >>>> >>>> *stringVar := (PipeableOSProcess command: 'echo...') output. * >>>> *(Delay forSeconds:3) wait.* >>>> *(OSProcess command: 'pub... ').* >>>> *(Delay forSeconds:3) wait.* >>>> >>>> Thank you all. >>>> >>>> >>>> >>>> >>> > -- Saludos, Juan Pablo

Jan. 13, 2015

Notification on GC of an object?

by Torsten Bergmann

Esteban wrote: >you also need to register the object for cleanup, in the WeakRegistry. >(not on my machine, sorry I cannot put an example, but look around) It is simple and here is an example: Create a class: Object subclass: #Bar instanceVariableNames: 'id' classVariableNames: '' category: 'Foo' implemented an #initialize method initialize super initialize. id := UUID new. Transcript show: 'Initialized ', id printString; cr and implemented a finalization method: finalize Transcript show: 'Finalized ', id printString; cr Now in the workspace I instantiate the object: |anObject| Transcript open; clear. anObject := Bar new. Transcript flush. WeakRegistry default add: anObject. and by forcing garbage collection in a second step I can see that the finalization method is working: 3 timesRepeat: [ Smalltalk garbageCollect ]. Transcript flush. And I get the following output Initialized 4aa47ef1-0e4c-9a47-bddf-b406ee2042e4 Finalized 4aa47ef1-0e4c-9a47-bddf-b406ee2042e4 If it doesnt work check your VM for updates. I'm using Pharo4.0 Latest update: #40442 on Windows with the following VM: Win32 built on Sep 4 2014 01:13:32 Compiler: 4.6.2 VMMaker versionString https://github.com/pharo-project/pharo-vm.git Commit: c7bc23dd6053d5f9934f7dd427537f76fc96eb32 Jenkins build #14851

Jan. 13, 2015

Re: [Pharo-users] Object select or create methods

by sergio_101

oh! Thing, in this case, is just an object.. that extends Object.. where 'red_thing' is just a string.. so, myThing's key would just be a string.. that way, i could do something like myThing := Thing getByKey: 'red_thing' .. or myThing := Thing getByKey: 'blue_thing' yes, this will be a global thing.. >> Thing>>findOrCreateByKey: aKey >> ^Smalltalk at: aKey ifAbsentPut:[self createThingFor:aKey] i am not sure this is what i want to do.. i jus want to use the above to create a bunch of object.. then later, do something like: newThing := Thing findByKey: 'green_thing'. the above looks like i would have a nebulous 'key'.. and from there, i can use it to grab my instance of Thing. is that correct? oh! and asMutator is what i was looking for.. thanks so much! On Tue Jan 13 2015 at 1:07:42 PM Paul DeBruicker <pdebruic(a)gmail.com> wrote: > Hi - comments below > > > sergio_101 wrote > > During my daily work in another framework, we are able to do something > > very > > handy like so: > > > > myThing := Thing findOrCreateByKey: 'red_thing'. > > > > where the key is some underscored all lower case unique name for an > object > > we will be calling all the time. > > > > this will return either a new thing with a key of 'red_thing' or the > > current one that already exists. > > In your example above what type of object is Thing? > If the object stored at red_thing is to be a global then you'd want > > Thing>>findOrCreateByKey: aKey > ^Smalltalk at: aKey ifAbsentPut:[self createThingFor:aKey] > > Look at the senders/implementors of #at:ifAbsentPut: for other ideas e.g. > > Dictionary>>#at:ifAbsentPut: > > > > We can also do something like: > > > > myThing updateWithDictionary: aDictionary. > > > > and it will flip through the dictionary and assign values to the instance > > variables. > > MyClass>>updateWithDictionary: aDictionary > > aDictionary keysAndValuesDo:[:key :value| > self perform: key asMutator with: value]. > > > > > The above is very handy. > > > > I am currently creating a bunch of methods that populate my image with > > real > > objects, and could use these methods. > > > > My question is. Does a behavior like this already exist? If not, I'd like > > to add these methods to my project (in monticello). They will be used > with > > several different objects, so should I add the methods to Object? > > > > I would imagine this is something I would want to use a great deal. How > > would I go aobut making this something I could include easily in further > > projects? > > > > I realize that the 'updateWithDictionary' is very inefficient, but this > > will just be somethign that runs once, during data import, and never > > again. > > > > I just want to make sure I am not doing anything whacky. > > > > Thanks! > > > > > > -- > View this message in context: http://forum.world.st/Object- > select-or-create-methods-tp4799266p4799384.html > Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com. > >

Jan. 13, 2015