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Binding semantics of SystemDictionary
by Max Leske April 4, 2015

April 4, 2015

Hi Tommaso and I, while hacking on Fuel, today discovered that globals in Pharo can have very weird bindings (I guess some of you already know that). For example: class := Class new setName: 4; yourself. Smalltalk at: class name put: class. So we now have a class with name 4 (which is a SmallInteger): self assert: (Smalltalk at: 4) == class. There are basically two different issues: 1. SystemDictionary will store any kind of association, not only symbols / strings 2. SystemDictionary is an IdentityDictionary and as such two equivalent but not identical keys will not resolve to the same object: class := Class new setName: (String streamContents: [ :s | s nextPutAll: 'someName']); yourself. Smalltalk at: class name put: class. Smalltalk at: (String streamContents: [ :s | s nextPutAll: 'someNameâ]) ifAbsent: [ false ]. âââ> falseâ In Fuel we simply assume that any key to a global is either a ByteString or ByteSymbol. If thatâs not the case bad things happen. It would help us a lot if we could clear up the semantics of bindings in SystemDictionary: 1. Are bindings with keys that are not ByteString or ByteSymbol valid? 2. Should we keep allowing ByteString as keys to globals (ByteSymbol guarantees identity)? 3. If we allow ByteString, do we also allow WideString? 4. Would âtype checksâ on SystemDictionary incur a big performance penalty? Any suggestions are welcome. Cheers, Max

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Freeze while running a loop
by Gaurav Singh April 4, 2015

April 4, 2015

My window freezes whenever i try to run a loop which has even 100000 iterations which are quite less for a computational device. Let say i run : [| temp | temp := String new. (1 to: 100000) do: [:i | temp := temp, i asString, ' ']] timeToRun. The time taken to compute is a few milliseconds , but the program freezes for quite a few seconds, What can be the problem ?

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Forcing GTInspector to refresh
by stepharo April 4, 2015

April 4, 2015

Hi I was doing a video on teaching how to build a simple counter and I would like to know how I can refresh the value of an instance variable in GT. I really hope that we will fix such kind of problem because it kills my fun showing Pharo. Stef

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MethodContextTest
by Ben Coman April 4, 2015

April 4, 2015

As I understand it, MethodContext is not more, and now there is only Context. Should MethodContextTest be renamed ContextTest ?

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Re: [Pharo-dev] Pharo 4 Beta, first impressions
by Hilaire April 4, 2015

April 4, 2015

Le 03/04/2015 15:56, Benoit St-Jean via Pharo-dev a Ã©crit : > > I can perfectly understand that "not everything has to be in the > image" and that, ultimately, someone has to maintain that code. The > only problem I have with the removal of that theme is that more than > 55% of users are running some flavor of Windows. It's not as if > someone would ask for an OS/2 or a Motif UI theme! There are *LOTS* > of people on Windows still ! > Hi Benoit, I agree with you this window theme may have its usefulness in professional desktop application for Pharo[1]. But Desktop application is not really the priority and I am afraid you are own your own. In the other hand it should be doable to maintain it as a separate package. Hilaire [1] You can even still see in operation kind of DOS like operated application, mainly because it is handy for users. I guess Windows theme can serve the same purpose, may be this is what Benoit is explaining about. -- Dr. Geo - http://drgeo.eu iStoa - http://istoa.drgeo.eu

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About PharoShortcuts
by Nicolai Hess April 3, 2015

April 3, 2015

15288 <https://pharo.fogbugz.com/default.asp?15288> Shortcuts in text editor are hardcoded I think it is a good idea to commonly name those short cuts. But this does not help to make the shortcut handling really configurable. For example, how would we change the shortcut for "toggle comment" ? - we need a setting that lists all PharoShortcuts, - change the keycombination in the setting - toggleCommentOnSelectionOrLine now would return the new shortcut But how do we populate the change to all users of this shortcut? We would need to rebuild all keymaps. (And if we want to save and load this shortcuts settings (load settings at startup), we need to rebuild all keymappings on every image startup). Instead, we could define commonly named "Actions". A texteditor can register this action in its keymap and the action has a unique configurable KMKeyCombination what do you think? cheers nicolai

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Another step towards removing CodeHolder :)
by stepharo April 3, 2015

April 3, 2015

hi guys today guille extended my first cut at writing a new filecontentsbrowser :) now it works so we can remove pseudo-class, filepackage and others :) and we started to define a changelistbrowser. So next sprint we will be able to say bye bye to CodeHolder and the complete hierarchy. Tx Guille

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Resizing of the print block (Pharo 4.0)
by Gaurav Singh April 3, 2015

April 3, 2015

Is there a way to resize the print block in the playground? Sometimes when the string is quite a bit long the print block never goes beyond a specific dimension which is quite less and therefore we have to scroll down more rows to check the output and the only way to see the better output is the inspector whereas in Pharo 3.0 we saw that the output depended on the size of the workspace.

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[Pharo-users] Pharo sprint on Friday, 3rd April
by Dmitri Zagidulin April 3, 2015

April 3, 2015

On Fri, Apr 3, 2015 at 12:41 PM, Martin BÃ¤hr < mbaehr(a)email.archlab.tuwien.ac.at> wrote: > > nice ideas. though beginners may not have any favourite projects. > are there any stats on which projects are popular so those can be chosen > for > testing? You're right. I think by 'favorite', I meant more like 'areas you care about in general, even outside of Pharo'. For example, say you're interested in data processing in general. You can ask, "How would I go about downloading a comma-separated (CSV) file, read it into Pharo, and display a graph?" This involves learning how to do File I/O, checking to see if there's a CSV library compatible with Pharo, and checking to see what sort of graphing libraries exist (I believe one was mentioned recently on the mailing list, Roassal or something). In similar vein, you can check out XML parsers, JSON parsers, etc, etc. Or you can ask "How do I connect to a relational database? I've heard Glorp mentioned, and OpenDBX, etc, so which of these would actually work in Pharo 4?". Or, For example, maybe you care about social media APIs. You can then think, "Hey I wonder if there are any Twitter or Facebook client libraries for Pharo. Maybe there's an Open Social API ( http://en.wikipedia.org/wiki/OpenSocial ) library that I can check out." That sort of thing. > > * Write blog posts in general! Write tutorials and walkthroughs on how to > > use some of the new 4.0 features. > same problem here, being new to pharo, i would not even know what the new > features are. this should be documented in release-notes probably. > Of course, understood. Then write posts about new user impressions of Pharo 4 (keeping in mind the usual "this is open source software" / "the devs are busy so don't be too harsh on them" sort of stuff). Or short tutorials on the various small things that you've figured out to do. (Like a cron job that fires up your Pharo image on the command line).

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Pharo sprint on Friday, 3rd April
by Jean-Christophe Bach April 3, 2015

April 3, 2015

Hi Pharoers, This email as a reminder for the next Pharo sprint: it will be next Friday (3rd April) at Inria Lille. You can also join us on the IRC channel (#pharo on irc.freenode.net server). During the sprint, we will try to synchronize local and remote Pharo sprinters. JC

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