September 2017 - Pharo-users

About neoCSV
by Stephane Ducasse Sept. 13, 2017

Sept. 13, 2017

Hi sven I have a question with NeoCVS Do you offer the possibility to manage the data of one line based on the description given by the first line Ex foo bar baz 1 2 3 11 22 33 => res doWith: [:tag :data | Transcript show: tag ; space ; show: data printString ;cr ] foo 1 bar 2 baz 3 foo 11 bar 22 baz 33 Stef

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Who is maintaining of Artefact?
by Alejandro Infante Sept. 13, 2017

Sept. 13, 2017

Hi! I would like to explore having support for Unicode characters. I want to help for it. Who is the right person to talk about it? Cheers! Alejandro

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help needed regarding conversion of hex to binary
by Casimiro de Almeida Barreto Sept. 12, 2017

Sept. 12, 2017

Is there a (easy and ready) way to convert hexa to binary. I mean, convert data that was transformed Â Â Â x := myData asByteArray hex. back to binary?

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Accessor Creation in Nautilus Browser
by Rob Rothwell Sept. 12, 2017

Sept. 12, 2017

Hello, Is there a way to create accessors for more than one instance variable at a time with the Nautilus browser? "Class -> Refactoring -> Inst Var Refactoring -> Accessors" shows available instance variables, but only one can be selected... Thank you, Rob

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Pharo 6.1 debugger - suggestions break once, does funny things?
by Tim Mackinnon Sept. 12, 2017

Sept. 12, 2017

While Iâm on a debugger tripâ¦ anyone else also notice that the Suggestions, Break once debug option acts weirdly? I seem to get a debugger but it halts several lines after where I have said, and if I start stepping the debugger seems to jump to funny places and show values that donât line up with what I know is happening? If I use Suggestions, Break it seems to work correctly (apart from the Step Through I mentioned in another thread). Tim

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Object>>#name deprecated in Pharo 6 -- what do I need to do?
by H. Hirzel Sept. 11, 2017

Sept. 11, 2017

Hello In the last days there was a discussion that Object>>#name should no longer be used. I did not follow the discussion in detail. What was decided how #name should be replaced? What do I need to do if I get a deprecation warning [1]? Thanks for the answer in advance Hannes [1] The method Object>>#name called from PPCMNode>>#gtTreeViewIn: has been deprecated. Implement your own domain representation of an object, or use #asString or #printString instead. Select Proceed to continue, or close this window to cancel the operation.

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Re: [Pharo-users] [Pharo-dev] Can Realm (DB) and Pharo play together (or can we have a Pharo Realm Object Server to ROS) ?
by CÃ©drick BÃ©ler Sept. 11, 2017

Sept. 11, 2017

> âCan you move such discussions on pharo-users mailing-list and not pharo-dev ? Sorry for that ! I transfered... > > Iâve spent some time in the summer in what I call my quest to the ultimate and easy and fun architecture to prototype some personal administration apps and have fun :-) > Iâll share some experience and wonder if there are alternative in Pharo. > > I want app that are mobile firsts, then manageable with a computer (for more complex administrative tasks). > I want them reactive (I especially like reactive data driven application like meteor.js), ubiquitous around my devices and not always connected (offline-first - this is very important if not the first objective). > > Ok, so I was lurking around looking for server and mobile distributed databases and I finally found Realm (https://realm.io/products/realm-mobile-platform/ <https://realm.io/products/realm-mobile-platform/>) which is a cool architecture plenty of promises, well documented, lots of tutorials... The architecture is composed of 2 products: > - Realm DB [1] that runs on mobile device - multiplatform - fully open-source - performant - an object DB with some limitation though > - Realm Object Server (ROS) [2] - provide two-way data sync simple and easy - BUT proprietary even if free for developers â¦ the entry point for serious developments (in particular access programmatically to the server) is very expensive ! 1500$mo ! > > The developer edition with is free is already quite outstanding to me. Looks at this demo page on GitHub [3] ! > > Butâ¦ without any control to the ROS, I find ROS quite limited finally. I may then use the DB part, ROS free for what really need sync reactivity between devices or between group of people (like a black board), but store all less transient information to WhateverNoSQLDB probably in REST. > > Anyway I want to share that with you because it rings a smalltalk bell in my headâ¦ itâs about object data, live feeling, and I want to use Pharo on the server :) > > Maybe some people here have thought of an alternative ROS in Pharo or Gemstone ? Any ideas or remarks ? > I was aware of sebastian Flow living full-stack framework attempt but donât know more. > > TIA > CÃ©drick > > NB: Pharo looks more and more great ! Congratulations guys for you job ! I hope ESUG was nice. > Iâve just tried Telepharo on Pharo 6 (64 bit). Really great work too... It works like a charm, out of the box on low cost dedicated ubuntu servers [4] => 10â¬mo > Pharo 64 tinyBenchmarks is 2,75 times slower than on my Mac mini Core i5 2,5GHz from 2012 with SSD (I guess itâs not that bad and usable for personal applications servers). I think itâ about 3 times faster than on a raspberry Pi. > Mac mini (32 bit version): '1329870129 bytecodes/sec; 108576799 sends/secâ > Dedibox Low Cost server (64 bit version)â '595695171 bytecodes/sec; 39441333 sends/sec' > > NB2: to download/install Pharo from command line, on the web site instructions, it seems it lacks the trailing slash. I had to add it. > curl get.pharo.org/64 <http://get.pharo.org/64>/ | bash > > [1] https://realm.io/products/realm-mobile-database/ <https://realm.io/products/realm-mobile-database/> > [2] https://realm.io/products/realm-mobile-platform/ <https://realm.io/products/realm-mobile-platform/> > [3] https://github.com/realm-demos <https://github.com/realm-demos> > [4] https://www.online.net/fr/serveur-dedie/dedibox-sc <https://www.online.net/fr/serveur-dedie/dedibox-sc> > > > > > > -- > Serge Stinckwich > UCN & UMI UMMISCO 209 (IRD/UPMC) > Every DSL ends up being Smalltalk > http://www.doesnotunderstand.org/ <http://www.doesnotunderstand.org/>

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#parseMethod:onError: isn't as obvious as expected - is it me?
by Tim Mackinnon Sept. 11, 2017

Sept. 11, 2017

Iâm looking for some feedback on the usage of RBParser>>#parseMethod:onError:. I am looking at ways of improving the way we edit code - and making things work (as least for me - but maybe for everyone) a bit more like IntelliJ where they have some great code operations and very good keyboard support. We are certainly close, but at times feel a bit clumsy - which is a shame as we have far better infrastructure to support equivalent features. So I thought I would have a go. Anyway - step one (which I think Iâve come close on), was to teach senders/implementors to look at the AST so you donât have to highlight exactly what you want to search on - instead it can infer from your cursorâ¦ however my next step was to improve how we can select code to ease refactoring, bracketing etcâ¦ So this is where Iâve hit a few issues which strike me as confusing (and I will freely admit that Iâm not a mega compiler, parser guy - but Iâd love to beâ¦). The following code blows up strangely - and I think its very confusingâ¦ as it turns out that #parseMethod:onError: doesnât work like I would expect (and this is where Iâm after feedback). It seems that the onError block doesât actually exit parsing - it takes the result and then keeps running with something in an intermediate state - thus below, when I try to parse with a subset of the code (and maybe this is a naive approach to handle the case when you start typing code in the middle of a complete method, but want to parse it before youâve entered a final â.â or â;â) - you actually end up with an AST that is using all of the source code because the result of the error block is then applied inside the executing method. I find this very confusing? There are no comments in this code, and for me the convention of onError: is to execute in isolation unless there is a parameter that the error block can interact with. Iâm wondering if those with more knowledge agree - or if it is my naivetÃ©? This was my original code (and yes it needs refactoring a bit) - but anyway: bestNodeInTextAreaOnError: aBlock "Find the best node in the editor text area at the current pointer location" | ast start stop node source | start := self textArea startIndex. stop := self textArea stopIndex. source := self textArea string trimRight. ast := RBParser parseMethod: source onError: [ RBParser parseExpression: source onError: [ source := (source truncateTo: stop) trimRight. RBParser parseMethod: source onError: [ RBParser parseExpression: source onError: aBlock ]]]. stop > source size ifTrue: [ start := stop := source size]. node := ast bestNodeFor: (start to: stop). node ifNil: aBlock. ^node But this doesnât work, as âastâ is incorrect when it parses truncated source. To work around what Iâm seeing I have to instead extract the ast assignment to another method that looks as follows - but to me it seems very unexpected to have the explicit ^ statements? agressivelyParse: source at: loc "Find the best node in the editor text area at the current pointer location" ^RBParser parseMethod: source onError: [ ^RBParser parseExpression: source onError: [ | reducedSrc | reducedSrc := (source truncateTo: loc) trimRight. ^RBParser parseMethod: reducedSrc onError: [ ^RBParser parseExpression: reducedSrc onError: [^nil]]]]. This forces the ast to be exactly what I would expect - but Iâm wondering if I am missing something obvious? Tim

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New chapter for coming book: Messages
by Stephane Ducasse Sept. 11, 2017

Sept. 11, 2017

Hi after this crazy esug I took a long bus and I wrote one missing chapter for the forhtcoming bus. I plan to have a first full version for 1 of October :) I reorganised and massively clean the book contents. Comments are welcome in any form. Stef https://github.com/SquareBracketAssociates/LearningOOPWithPharo

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Pharo 6.1 debugger - doesn't always step/step through reliably?
by Tim Mackinnon Sept. 10, 2017

Sept. 10, 2017

Has anyone else noticed that if you are stepping through code - the into and through operations donât always step into or step through? Iâve been debugging some RBParser code to understand how it works and I notice that when I try to step through #intersectsInterval: anInterval in the chains of nodes it alway skips going into methods when its looping through a collection (and its not the first loop through, but the second one where the debugger just stops over and not into). I canât find a very specific example - but thought I would see if this is a known issue or whether possibly I am doing something wrong? Iâm assuming that when faced with looping through a collection of children, its normal to use âthroughâ to get into the iteration block, and then once inside I can use âintoâ to then step into a method that each child is calling. As I said, it works the first time, but the second time (when I find I have to click âthroughâagain to get into the block for the next child, its then when âintoâ just doesnât seem to cooperate? One possibility - are getter methods optimised - as in for a method #size, if it simply returns an iVar - does the debugger not step into those? Tim P.s. while taking about the debugger - does anyone else find the current keyboard shortcuts for over, into, through a real nuisance? They arenât consistent between all 3, or easily pressable e.g. Into = cmd+e, over = cmd+shift+o, cmd+shift+t I donât mind holding cmd-shift with my left hand, but then my right hand should have keys close to each other for these operations (like I, o, p - and yes p doesnât quite match âthrough", but its conveniently in order to let you quickly step through lots of code.

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