September 2017 - Pharo-users

Re: [Pharo-users] Force headless mode
by Cyril Ferlicot Sept. 26, 2017

Sept. 26, 2017

On Tue, Sep 26, 2017 at 5:13 PM, Christophe Demarey <christophe.demarey(a)inria.fr> wrote: > Hi > > What about deploying a minimal image without UI ? > But, as you probably know, headless mode does not prevent to dump the code. > I just tried to build our tools on a minimal image but it crash when trying to load a github's project. I now added a piece of code to update Metacello to a newer version but it just do nothing without any log. I know there is still some way to get the code but this is the first step to build a real delivery image. > Christophe > -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

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Re: [Pharo-users] Force headless mode
by ClÃ©ment Bera Sept. 26, 2017

Sept. 26, 2017

Or write a script that obfuscate the code. Not so hard to do. On Tue, Sep 26, 2017 at 5:13 PM, Christophe Demarey < christophe.demarey(a)inria.fr> wrote: > Hi > > What about deploying a minimal image without UI ? > But, as you probably know, headless mode does not prevent to dump the code. > > Christophe > ----- Cyril Ferlicot <cyril.ferlicot(a)gmail.com> a Ã©crit : > > Hi, > > > > At Synectique we are working on the deployment of a web application > > and we would like to force the headless mode. We tried to just > > override the method SmalltalkImage>>#isHeadless to return true all the > > time be it is not enough because the image is still opened. It is > > probabaly the vm that open the window. > > > > I know we can add some arguments to the command line to open the image > > as headless but we want to forbid the user to launch the image without > > headless to protect the code. > > > > Is this possible? Do you have some pointers? > > > > Thanks in advance. > > > > -- > > Cyril Ferlicot > > https://ferlicot.fr > > > > http://www.synectique.eu > > 2 rue Jacques PrÃ©vert 01, > > 59650 Villeneuve d'ascq France > > > > >

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Need help with NeoJSON reader definition
by jtuchel＠objektfabrik.de Sept. 26, 2017

Sept. 26, 2017

Hi there, I am having a hard time configuring a NeoJSONReader for a JSON file like this: { Â Â Â "Paging": { someStuff Â Â Â Â Â Â }, Â Â Â "ErrorMessage": null, Â Â Â "ErrorCode": 0, Â Â Â "Data": [ Â Â Â Â Â Â Â {object1}, Â Â Â Â Â Â {object2} Â Â Â Â Â Â ] } Where I want to ignore everything but the list named "Data". (Of course I'll have to take a look at ErrorMessages later, but one step after the other...). I've tried several combinations of mappers and always end up with NoeJSON parsing Exceptions. I semm unable to see the obvious. In The end I just want to only use the contents of the Data list and map each entry in there to some smalltalk object. I was successful with other structures and lists, but this time I am unable to see the forest among all those trees. Any hints? Joachim

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NeoJSON and polymorphism
by Juraj Kubelka Sept. 26, 2017

Sept. 26, 2017

Hi, By studying the NeoJSON book chapter (Pharo Enterprise), I do not understand how to modify the following example: -=-=-=-=-=-=-=- "Let us say that we have an Attachment class..." Object subclass: #Attachment instanceVariableNames: 'url fileName' classVariableNames: '' package: 'NeoJSON-Use-Case'. "...with url: and fileName: methods." Attachment compile: 'url: anObject', String cr, String tab, 'url := anObject' classified: 'accessing'. Attachment compile: 'fileName: anObject', String cr, String tab, 'fileName := anObject' classified: 'accessing'. "Let's create a collection of two instances:" collectionOne := { Attachment new url: 'http://example.com/random-name.txt' asZnUrl; fileName: 'chapter-one.txt' yourself. Attachment new url: 'http://example.com/random-name.png' asZnUrl; fileName: 'image.png'; yourself. }. "And let's map it to a JSON structure:" String streamContents: [ :aStream | (NeoJSONWriter on: aStream) for: #CollectionOfAttachments customDo: [ :mapping | mapping listOfElementSchema: Attachment ]; mapAllInstVarsFor: Attachment; for: ZnUrl customDo: [ :mapping | mapping encoder: [ :aZnUrl | aZnUrl asString ] ]; nextPut: collectionOne as: #CollectionOfAttachments. ]. "And read the JSON structure:" (NeoJSONReader on: '[{"url":"http://example.com/random-name.txt","fileName":"chapter-one.txt"},{"url":"http://example.com/random-name.png","fileName":"image.png"}]' readStream) for: #CollectionOfAttachments customDo: [ :mapping | mapping listOfElementSchema: Attachment ]; for: Attachment do: [ :mapping | mapping mapInstVar: 'fileName'. (mapping mapInstVar: 'url') valueSchema: ZnUrl ]; for: ZnUrl customDo: [ :mapping | mapping decoder: [ :string | string asZnUrl ] ]; nextAs: #CollectionOfAttachments. "=======================" âThe previous example works perfectly, including the ZnUrl mapping (notice that url variables have ZnUrl instances). Now, let's say that we want to distinguish PNG and TXT attachments. For that reason we will create two Attachment subclasses..." Attachment subclass: #PngAttachment instanceVariableNames: '' classVariableNames: '' package: 'NeoJSON-Use-Case'. Attachment subclass: #TxtAttachment instanceVariableNames: '' classVariableNames: '' package: 'NeoJSON-Use-Case'. "...with type methods that might be used in a new JSON structure:" PngAttachment compile: 'type', String cr, String tab, '^ ''png''' classified: 'accessing'. TxtAttachment compile: 'type', String cr, String tab, '^ ''txt''' classified: 'accessing'. "Let's create a collection with the PNG and TXT instances:" collectionTwo := { TxtAttachment new url: 'http://example.com/random-name.txt' asZnUrl; fileName: 'chapter-one.txt' yourself. PngAttachment new url: 'http://example.com/random-name.png' asZnUrl; fileName: 'image.png'; yourself. }. "How can I modify NeoJSONWriter and NeoJSONReader mappings? The JSON structure should (ideally) looks like this:" '[ {âtypeâ:âtxtâ,"url":"http://example.com/random-name.txt","fileName":"chapter-one.txtâ}, {âtypeâ:âpngâ,"url":"http://example.com/random-name.png","fileName":"image.pngâ} ]' -=-=-=-=-=-=-=- I would like to keep the mapping isolated (without defining neoJsonOn: methods). Thank you! Juraj

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Web stack practices (Glorp / QCMagritte)
by laurent Sept. 24, 2017

Sept. 24, 2017

Hi all, it's been a long time :) At work we are currently comparing several technologies to start a business project that will hopefully be used by thousands of people for several years ;) We need a web stack and we put Pharo & co in the comparative process. My team have strong experience in load-balanced php / mysql deployment that handles millions of records but we are ready to build on something else though MySQL is still a requirement. Thanks for Garage + Glorp, I can prototype things. I wonder how to handle database schema migrations. With our PHP projects we have versionned PHP scripts that are automatically run given a database revision number ( see http://git.afi-sa.fr/afi/opacce/tree/master/cosmogramme/sql/patch ). What are the practices with Glorp ? We try QCMagritte and we enjoy what we see so far. What are the best practices to glue Magritte and Glorp together ? Especially when you load-balance requests on several images. Some examples ? ( FYI, I cannot load QCMagritte in a fresh Pharo 6 image ( for #stable version, MADescriptionBuilder missing. For #development versions of Magritte and QCMagritte, QCConfiguration missing ). So actually I use the one built on CI. ) May be you have some other suggestions on a framework you love ? Best regards, Laurent Laffont

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PharoCloud method sources
by Esteban A. Maringolo Sept. 22, 2017

Sept. 22, 2017

I recentrly noticed that the examples gently hosted at PharoCloud don't have any sources available, and since the examples for both Bootstrap[1] and Rickshaw[2] uses code reflection to display the sources used to produce each example, they don't work and you get a `self methodHasNoSourceCode` instad. Can this be fixed somehow? [1] http://pharo.pharocloud.com/bootstrap/browser/Alerts [2] http://pharo.pharocloud.com/rickshaw Esteban A. Maringolo

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Rails Express Demo Using Pharo Seaside
by Peter Fisk Sept. 21, 2017

Sept. 21, 2017

I have added a new blog post showing how I am using Pharo Smalltalk and Seaside to rapidly create Ruby-on-Rails applications. https://railsexpress.quora.com/Pharo-Seaside-Express <https://railsexpress.quora.com/Pharo-Seaside-Express> There is also a short video showing a simple application running under Pharo/Seaside and then being converted to Ruby-on-Rails. The application uses the Qooxdoo JavaScript framework for the UI. Seaside Express Video <https://www.youtube.com/watch?v=h1CNJ1NR_kY> The blog outlines some of my thoughts about the development philosophy.And the video gives some idea of how this works in practice - particularly how quickly (about a minute) an entire Ruby-on-Rails application can be generated from the Smalltalk specification.I will release the Seaside-Qooxdoo classes later this year when the code is more stable.-- Peter -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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(no subject)
by Vityou . Sept. 21, 2017

Sept. 21, 2017

I recently discovered the pharo launcher. However, it only gives me options to use outdated images, and I'm not sure about the vm. Is there any way to change this?

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PetitParser Mystery
by Sean P. DeNigris Sept. 21, 2017

Sept. 21, 2017

Given: generationalPart := (#space asParser, generational) ==> #second. middleName := (#space asParser, (generational not, abbreviatableToken) ==> #second) ==> #second. lastName := (#space asParser, (generational not, token) ==> #second) ==> #second. and input := 'John Smith Jr'. The following parser fails: abbreviatableToken, middleName optional, lastName, generationalPart optional. But this one succeeds: (abbreviatableToken, middleName, lastName, generationalPart optional) / (abbreviatableToken, nil asParser, lastName, generationalPart optional) They look the same to me. What is the difference? Thanks! ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Continued Fractions
by phil＠highoctane.be Sept. 20, 2017

Sept. 20, 2017

Do we have anything related to continued fractions in Pharo? https://en.wikipedia.org/wiki/Continued_fraction I need that to match rectanges to aspect ratios etc. TIA Phil

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