Squeak-dev March 2009

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134 participants
173 discussions

Re: [Pharo-project] cant squeak map
by Göran Krampe 12 Mar '09

12 Mar '09

Hi! (being the creator of SM I can't resist this thread on Pharo-list...) Yes, I am cross-posting, so sue me. Stéphane Ducasse wrote: > Yes yes yes but we do not use SM since years. > I cannot load one single package without breaking my image. > If you read the comments of a package you should not load it because > most > of the time people entered that the code may work. > Then the version identification is often obsolete. The above is not really a problem with SM "as a tool" but with the contents of SM. And as I predicted a few years back, SS (Squeaksource) and PU (package universes) are indeed competing with SM and would (as it did) cause us to get a fragmentation. I am not blaiming anyone, but I do see that as the primary cause of "data rot". Since a lot of projects use SCM hosting as available on SS they don't bother taking the extra step in keeping entries at SM fresh. Understandable but still a pity we couldn't create some harmony there. PU was a clear "fork" of SM (not the codebase but the use case) adding dependencies. I still think it was sad that people couldn't instead help out in SM making it better. > So you may be able to load SM in pharo but we will not use it as a way > to manage code. Ehm... SM was never meant to "manage code". It is not an SCM. > Sorry guys. clean SM first if you want it to be a credible alternative. This last line is... odd. What do you mean with "guys"? And why do you think "cleaning it" would solve something? I am not saying that cleaning is not needed - just saying that cleaning is not solving the real problem. We can't seriously tell people to maintain their packages in 3 different places (SS, PU, SM) IMHO. I am interested in creating a new SM3 that can replace both PU and SM and that plays very well with SS installations (there are more than one even though squeaksource.com is the most important one) and can use Deltastreams. By "replace" I mean that SM3 of course should simply replace current SM but also that it could possibly "auto mirror" packages from SS installations making them available on SM3 *without any extra effort at all*. If SM3 also covers the functionality that PU has (dependencies etc) then perhaps we could migrate over to it from PU. Or again, we could make SM3 be able to "auto mirror" PUs, but that would be less optimal I think. Yes, I am picking up Deltastreams, have fixed lots of broken tests over the last few days and have read up on Matthew's code. I think DS is a really promising technology that can open up new nice tools, and still not compete head on with MC/MC2. Instead it should hopefully replace changesets and form a nice complement to MC/MC2. Finally, I have always felt that SM should work in as many Squeak images as possible - and Pharo is one of them of course. I don't care if Pharo decides to not have SM as a "first class" citizen - as long as it can be loaded into Pharo, and I will try to help out with ensuring that it can - hopefully that is an effort that Pharo developers appreciate. (?) regards, Göran

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Re: Squeak-dev Digest, Vol 75, Issue 23
by Ralph Boland 12 Mar '09

12 Mar '09

... > > How difficult is it to modify Squeak 3.9 or later so that the display > > of the '_' > > character shows an arrow? > You need to 'draw' the proper glyph inside the kind of AbstractFont > you're using. If you're using StrikeFonts, it is not hard. Each font has > a Form with all the glyphs in it. Can I not simply copy some code that exists in Squeak 3.8.1? If not I am not sure how to draw the proper glyph. Can you elaborate? I have never modified which font is being used by Squeak to display code. I am running Linux Ubuntu 8.10. Where can I find this information? The StrikeFont class seems to be used in a lot of places so I assume this is the font I am using. > > I promise that I will switch to the := operator for assignment before > > releasing, really! > > > > Ralph Boland > There's not a real consensus in this area. Many people (me included) > really prefer the left arrow for assignment and will not accept others >to prevent us from doing so. Please don't promise that. Switch to := > only if you want. > Cheers, > Juan Vuletich I assume that the _ character has been deprecated so that at some time in the future it will be possible to write a variable name as var_name. Otherwise I see no point in taking the deprecation step. While I am not fond of this change I do accept it and will conform when the point arrives that I need to. For me that point is when I release my code. Ralph Boland -- When a woman becomes sexually aroused the necessary blood flows from her heart. When a man becomes sexually aroused, the necessary blood is removed from his brain.

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Re: Updating key morphic/etoy features in the main Squeak release
by Robert Hawley 12 Mar '09

12 Mar '09

Hi Craig Would I like to write a proposal? Not at this stage - I am not sufficiently aware of who does what and of how things are done. Can you answer about is this being managed and/or fixed and about plans, issues and people's motivations? For example - are you involved in this topic? It is a topic that I am interested in, and I have a fair knowledge of how Morphic works. I don't know about the processes of getting things into the Squeak releases however. Neither do I know if the current protagonists for the etoys system are wanting to be involved in back- porting their work to Squeak. Yours Bob > Hi Bob-- > > Would you like to write a proposal? > > > -C > > -- > Craig Latta > www.netjam.org > next show: 2009-03-13 (www.thishere.org)

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Updating key morphic/etoy features in the main Squeak release
by Robert Hawley 12 Mar '09

12 Mar '09

There are nice modifications in the Etoys system that should be bought back into the main Squeak release. (I mention as specific examples key features like the scripting tile for looping and the adjustment mechanism for changing the rotational centre of objects.) I am aware that many Squeak developers now see Etoys morphic as a distraction to other uses of Squeak. While this is understandable, it should not mean an unnecessary split and a weakening of the version in Squeak as compared with the Squeakland version. Etoys is often represented as a big plus for Squeak, so it does not make sense to have a crummy version in the main Squeak distribution when there are better versions to be had. The disadvantage of the pure Etoys version is that there is not a ready way to get back to standard Smalltalking. Etoys is a useful route into introducing and teaching Smalltalk, so it is a pity if that route is not kept easily and straight forwardly accessible. Is this being managed and/or fixed? I'd be interested to hear what plans are afoot and what issues are driving people. Yours Bob

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monticello http
by Sebastian Sastre 12 Mar '09

12 Mar '09

hi there, I'm trying to setup a directory with authentication to use monticello via http (which seems less error prone and faster to commit than ftp). Pretty much the same as in squeaksource. I've setup the dir with AuthType Basic but MC seems complains about it is unable to access when I try to open. When I try to commit it complains: 405 Method Not Allowed any ideas? thanks sebastian

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Continuations
by Andrew P. Black 11 Mar '09

11 Mar '09

I have what may be a silly question about continuations. First, some background. I'm about to give a lecture on Continuations. I'm trying to model what the "functional people" do, just to show off the flexibility of Smalltalk. I'm working in the Seaside one-click image, because, having introduced continuations, I want to talk about the way that they are used in Seaside to implement natural control flow. So, I'm not trying to solve any particular programming problem Here is a little example that I wrote to illustrate a continuations. SeasideDemo >> countUpTo: initialInterruptValue "demonstrate resumable continuations" | interruptValue | interruptValue := initialInterruptValue. 1 to: 1000 do: [:i | Transcript show: 'i = '. Transcript show: i. Transcript cr. i = interruptValue ifTrue: [interruptValue := Continuation currentDo: [:cc | ^ cc]]] If I execute d := SeasideDemo new. c := d countUpTo: 7 in a workspace, I get i = 1 i = 2 i = 3 i = 4 i = 5 i = 6 i = 7 in the Transcript, as you would expect. Then the method returns, with a continuation, which I name c I can then resume that continuation: c value: 12 and the count in the transcript goes i = 8 i = 9 i = 10 i = 11 i = 12 as I would expect. However, if I "doit" c value:12 a second time, the count resumes from 13, not from 8. This surprised me. Strangely, if instead of assigning the result of d countUpTo:7 to c, I just inspect it, and doIt self value: 12 in the inspector, then the count continues from 8 to 12. I can doIt multiple times, and each time the count goes from 8 to 12. However, what is strange is that I get a new inspector on a new continuation each time I doIt. I can only infer that the initial "inspect It" has somehow been captured as part of the continuation. I'm also confused to find that the result of c2 := c value: 15 is not a new continuation, that will count up from 15 but ... nil. Are my expectations wrong? Are there bugs in the Seaside implementation of Continuations? Or what? Andrew ____________________________ Prof. Andrew P. Black Department of Computer Science Portland State University Oregon, USA http://www.cs.pdx.edu/~black Telephone: +1 503 725 2411

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subliminal message
by Stephen Pair 11 Mar '09

11 Mar '09

I really like Apple's homepage today (and it has nothing to do with the new iPod shuffle)...they even got the capitalization correct. ;) http://www.apple.com - Stephen

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Wanted: Google Summer of Code 2009 Mentors and Projects
by askoh 11 Mar '09

11 Mar '09

It is time for us to apply for Google Summer of Code 2009 (Mar 9-13th). In order to be successful we need to show that we have lots of mentors and projects. Please visit http://wiki.squeak.org/squeak/6118 and put your name as mentor and post your projects. Also join the SoC mailing list. GSOC has been very good the the Squeak community in the past two years. Thanks, Aik-Siong Koh GSOC 2009 admin -- View this message in context: http://www.nabble.com/Wanted%3A-Google-Summer-of-Code-2009-Mentors-and-Proj… Sent from the Squeak - Dev mailing list archive at Nabble.com.

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Scape code for printers
by Giuseppe Luigi Punzi 11 Mar '09

11 Mar '09

Hi list. I need to do a little program, to test if a cash drawer opens correctly from a Ticket printer. With some code evaluated from a workspace is enough. Somebody can light my way, how to send scape codes to a port? (COM, LPT, USB etc.) Thanks in advance.

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How to profile a server image?
by Herbert König 11 Mar '09

11 Mar '09

Hi, say I have a web server with several users logged into different sites. What do i have to start a MessageTally on to see where the image spends its time? Thanks, Herbert

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