December 2017 - Pharo-users

Object Persistence

by Ian Ian

Hi All, Thoughts of a purely OO nature? :)

Dec. 25, 2017

Re: Pharo things analog reads ?

by PeterJohn

Hi...Have you tried putting a 0.1uF capacitor from the input to GND?How quickly are you reading? Are you averaging or decimating? Also, have you added capacitors for the Aref pin?You may be picking up spurious signals. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Dec. 25, 2017

Re: [Pharo-users] Strange 'Connection closed while waiting for data.' Zinc error

by Andrew Glynn

The only time I've seen that behaviour is with the combination of a slow server and a proxy such as CloudFlare where the sysadmin has set tcp_wait to some ridiculously small number. Have you tried setting the connection reuse timeout to 0, or setting 'beOneShot'? Zinc doesn't support the additions in HTTP/2, but I can't offhand think of any reason that should cause that specific behaviour. I've had sufficient problems with HTTP/2 over slow connections (I live where there are no land lines of any kind) that I replaced the HTTP/2 code in Nginx with code from pureftpd in order to access my server at home when I'm out. Andrew ï»¿On 2017-12-24, 3:30 PM, "Pharo-users on behalf of Yuriy Tymchuk" <pharo-users-bounces(a)lists.pharo.org on behalf of yuriy.tymchuk(a)me.com> wrote: Hi, Iâm trying to hack something with Pharo 6.1 and Phillips Hue[1] (they have a simple REST API). When I try to do a GET request with Zinc like this: ZnClient new url: 'http://192.168.0.115:80/api/1028d66426293e821ecfd9ef1a0731df/lights/'; get I get a âConnectionClosed: Connection closed while waiting for dataâ exception. The service provides a JSON response that I can get without a problem by using a web browser or curl. Also if I try to access fewer data (e.g. adding /1 to the url, so it gets only one resource) I donât get the exception. What is even more strange, when I resume the exception I get the desired response i.e. this works: [ ZnClient new url: 'http://192.168.0.115:80/api/1028d66426293e821ecfd9ef1a0731df/lights/'; get ] on: ConnectionClosed do: [ :ex | ex resumeUnchecked: ex defaultResumeValue ] Of course I cannot share the server that is on my local network for resting, but maybe anyone knows it there are any known issues with Zinc, or if there are ways for me to debug the issue further. Cheers. Uko [1]: https://www.developers.meethue.com

Dec. 25, 2017

Strange 'Connection closed while waiting for data.' Zinc error

by Yuriy Tymchuk

Hi, Iâm trying to hack something with Pharo 6.1 and Phillips Hue[1] (they have a simple REST API). When I try to do a GET request with Zinc like this: ZnClient new url: 'http://192.168.0.115:80/api/1028d66426293e821ecfd9ef1a0731df/lights/'; get I get a âConnectionClosed: Connection closed while waiting for dataâ exception. The service provides a JSON response that I can get without a problem by using a web browser or curl. Also if I try to access fewer data (e.g. adding /1 to the url, so it gets only one resource) I donât get the exception. What is even more strange, when I resume the exception I get the desired response i.e. this works: [ ZnClient new url: 'http://192.168.0.115:80/api/1028d66426293e821ecfd9ef1a0731df/lights/'; get ] on: ConnectionClosed do: [ :ex | ex resumeUnchecked: ex defaultResumeValue ] Of course I cannot share the server that is on my local network for resting, but maybe anyone knows it there are any known issues with Zinc, or if there are ways for me to debug the issue further. Cheers. Uko [1]: https://www.developers.meethue.com

Dec. 24, 2017

Getting Iceberg Commits Back to Github

by Evan Donahue

Hi, Once I have cloned my github repository and committed changes locally, how do I actually get those changes back to github? I went to synchronize repository > push > publish all, and it has a loading bar for a few seconds that says "pushing local commits to origin," but github reflects no changes. ssh -T confirms that github recognizes my key, and I'm using a stable pharo 7 from within the last week or so. Any help would be appreciated. Thanks, Evan

Dec. 24, 2017

Iceberg URL regex not matching how I would expect it to?

by Ian Ian

Hi All, I am having trouble setting up iceberg to access my repository via ssh. On the command line I assess it via: git clone user@server.com:/proj/proj.git and all works as expected. When adding trying to add the same repository to iceberg I get a parseUrl error thrown from class IceScpRemote. While debugging I see the following regex: matcher := '(ssh\://)?([\w\-]+@)?([\w\-.]+)(\:[\d]+)?(\:|/)/?([\w\-]+)/([\w\-]+)(\.git)?' asRegex. which parses username@server.com:/directory/proj.git. However fails to parse: username@server.com:/dir1/dir2/proj.git The corrected version is as follows: matcher := '(ssh\://)?([\w\-]+@)?([\w\-.]+)(\:[\d]+)?(\:|/)/?(([\w\-]+)/)+([\w\-]+)(\.git)?' asRegex. Questions: Is this by design? of the top of your head: If I use the corrected version am I going to run into other issues? NB: I am using 64 bit Pharo 6.0 Update: #60520 Thanks in advance,

Dec. 24, 2017

Re: [Pharo-users] NeoCSVWriter: how to output an empty quoted field

by Sven Van Caekenberghe

Joachim, It works for me: String streamContents: [ :out | (NeoCSVWriter on: out) addField: #x; addConstantField: String empty; addField: #y; nextPutAll: { 1@2. 3@4 } ]. => '"1","","2" "3","","4" ' What is the value of the instance variable #fieldWriter inside NeoCSVWriter ? It should default to #writeQuotedField: (as set in #initialize). If I am misinterpreting your intentions, please provide a small standalone executable example. Sven > On 24 Dec 2017, at 07:13, jtuchel(a)objektfabrik.de wrote: > > Sven, > > hmm. The fields I need to write are known not to be written with my application, so I am lloking for a way to define a field as being an empty quoted field at all times. > So for I've tried: > > addConstantField: nil --> Exception > addObjectFied: [:a| ] --> empty field without quotes > addConstantField: '' --> empty field without quotes > > So it seems I have to implement some method on my business object that returns nil and map it to all the fields that need to be empty and quoted. > > > Joachim > > > Am 22.12.17 um 15:48 schrieb Sven Van Caekenberghe: >> Hi Joachim, >> >> nil fields normally write as 'empty quoted fields': >> >> String streamContents: [ :out | (NeoCSVWriter on: out) nextPut: #(nil nil nil) ]. >> >> => '"","",""' >> >> Is this not what you want/need ? >> >> Sven >> >>> On 22 Dec 2017, at 15:05, jtuchel(a)objektfabrik.de wrote: >>> >>> Hi, >>> >>> I need to write a number of empty quoted fields in a CSV export. The receiving application will complain about missing quotes for empty text fields... (don't ask, I've done all the eye rolling for you already) >>> >>> My frst attempt was: >>> >>> writer addConstantField: '""'. >>> >>> >>> But this doesn't write the quotes - I really don't see why, but it's the case. >>> >>> Also, adding >>> >>> writer addObjectField: [:a| '""']. >>> >>> >>> doesn't really work, because it will literally add the double quotes between single quotes... (???) >>> >>> >>> >>> Do I really have to implement some method that returns an empty String on my business objects and use: >>> >>> writer addQuotedField: #justAnEmptyString. ? >>> >>> Am I missing some switch to enable quotes for empty quoted fields? >>> >>> My version of NeoCSVWriter on VA Smalltalk is not actually a current one... >>> >>> >>> >>> Joachim >>> >>> And, btw: Happy Holidays to all of you and a Happy new Year! >>> >>> >>> >>> >>> -- >>> ----------------------------------------------------------------------- >>> Objektfabrik Joachim Tuchel mailto:jtuchel@objektfabrik.de >>> Fliederweg 1 http://www.objektfabrik.de >>> D-71640 Ludwigsburg http://joachimtuchel.wordpress.com >>> Telefon: +49 7141 56 10 86 0 Fax: +49 7141 56 10 86 1 >>> >>> >> >> > > -- > ----------------------------------------------------------------------- > Objektfabrik Joachim Tuchel mailto:jtuchel@objektfabrik.de > Fliederweg 1 http://www.objektfabrik.de > D-71640 Ludwigsburg http://joachimtuchel.wordpress.com > Telefon: +49 7141 56 10 86 0 Fax: +49 7141 56 10 86 1 > >

Dec. 24, 2017

Re: [Pharo-users] NeoCSVWriter: how to output an empty quoted field

by jtuchel＠objektfabrik.de

Sven, hmm. The fields I need to write are known not to be written with my application, so I am lloking for a way to define a field as being an empty quoted field at all times. So for I've tried: addConstantField: nil --> Exception addObjectFied: [:a| ] --> empty field without quotes addConstantField: '' --> empty field without quotes So it seems I have to implement some method on my business object that returns nil and map it to all the fields that need to be empty and quoted. Joachim Am 22.12.17 um 15:48 schrieb Sven Van Caekenberghe: > Hi Joachim, > > nil fields normally write as 'empty quoted fields': > > String streamContents: [ :out | (NeoCSVWriter on: out) nextPut: #(nil nil nil) ]. > > => '"","",""' > > Is this not what you want/need ? > > Sven > >> On 22 Dec 2017, at 15:05, jtuchel(a)objektfabrik.de wrote: >> >> Hi, >> >> I need to write a number of empty quoted fields in a CSV export. The receiving application will complain about missing quotes for empty text fields... (don't ask, I've done all the eye rolling for you already) >> >> My frst attempt was: >> >> writer addConstantField: '""'. >> >> >> But this doesn't write the quotes - I really don't see why, but it's the case. >> >> Also, adding >> >> writer addObjectField: [:a| '""']. >> >> >> doesn't really work, because it will literally add the double quotes between single quotes... (???) >> >> >> >> Do I really have to implement some method that returns an empty String on my business objects and use: >> >> writer addQuotedField: #justAnEmptyString. ? >> >> Am I missing some switch to enable quotes for empty quoted fields? >> >> My version of NeoCSVWriter on VA Smalltalk is not actually a current one... >> >> >> >> Joachim >> >> And, btw: Happy Holidays to all of you and a Happy new Year! >> >> >> >> >> -- >> ----------------------------------------------------------------------- >> Objektfabrik Joachim Tuchel mailto:jtuchel@objektfabrik.de >> Fliederweg 1 http://www.objektfabrik.de >> D-71640 Ludwigsburg http://joachimtuchel.wordpress.com >> Telefon: +49 7141 56 10 86 0 Fax: +49 7141 56 10 86 1 >> >> > > -- ----------------------------------------------------------------------- Objektfabrik Joachim Tuchel mailto:jtuchel@objektfabrik.de Fliederweg 1Â Â Â Â Â Â Â Â Â Â Â Â Â http://www.objektfabrik.de D-71640 Ludwigsburg http://joachimtuchel.wordpress.com Telefon: +49 7141 56 10 86 0Â Â Â Â Â Fax: +49 7141 56 10 86 1

Dec. 24, 2017

Re: [Pharo-users] Learning Morphic

by Dimitris Chloupis

You could look at my project ChronosManager, you can download from inside Pharo and itâs main repo is here with a screenshot that demonstrates what it is https://github.com/kilon/ChronosManager Reading itâs code should give the info you seek , there are comments as well to help you On Fri, 22 Dec 2017 at 22:41, T.D. Telford <doug(a)dougtelford.com> wrote: > I am primarily interested in graphical shapes and bit maps (for > fractals). I want to put graphical shapes or bitmaps in a window or > bordered area. I have not been very successful in finding documentation > about how to do this in Morphic. In contrast, I find the documentation for > Roassal easy to find and to the point. Perhaps someone could point me to > Morphic documentation (or supply examples) on my area of interest that > includes a lot of examples. Thanks. > >

Dec. 23, 2017

Re: [Pharo-users] Pharo things analog reads ?

by Steven Costiou

I finally bought 2 of those chips, and it works very well. A simple file read from Pharo and i get my analog values (although i don't understand them, but that has nothing to do with the reading). It is very, very fast. Thanks again :) Steven. Le 2017-12-20 05:20, K K Subbu a Ã©crit : > On Wednesday 20 December 2017 03:50 AM, Steven Costiou wrote: > >> So connecting an Arduino-like device to the raspberry that is >> configured as an i2c slave, Pharo can ask for analog values. I will >> try tomorrow with analog sensors, I will share if i manage to build >> nice examples. >> >> Seems to be even easier using a special chip: https://learn.adafruit.com/reading-a-analog-in-and-controlling-audio-volume… > > An Arduino would be an overkill. Also, there is no need for bitbanging. MCP3008 is are directly supported by the IIO subsystem and its channel data is demuxed in /sys/bus/iio/devices/iio:device<n> > > http://www.jumpnowtek.com/rpi/Using-mcp3008-ADCs-with-Raspberry-Pis.html > > HTH .. Subbu

Dec. 23, 2017