March 2009 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] Fwd: [vwnc] Would you start a new Smalltalk?project today?

by Schwab,Wilhelm K

To call threaded code incomprehensible is to ignore many appropriate uses of them. The presumption is that software is thrown together and then made to work, rather than engineered to work correctly from the bottom up. Rather than focusing to exclusion on the non-determinism of threading, the author should also consider the independence of the individual threads; threads that do one thing and do it well can be far simpler than code that chops lengthy processes into small chunks that can be executed in sequence. At the risk of sounding prematurely curmudgeonly, I have used both approaches over time (using slicing when threads were not available to me). I would much rather face an over-protected (hence deadlocking) multi-threaded program than try to sort out a single-threaded switch statement from hell that tries to do the same job. Of course, I come at this with a Smalltalk bias, where finding the deadlock is often as simple as following a stack trace to an offending critical section. Dirty writes are a bear in any language, but my general approach is "don't make that mistake." It works for me. Bill --- Wilhelm K. Schwab, Ph.D. bschwab AT anest DOT ufl DOT edu -----Original Message----- From: pharo-project-bounces(a)lists.gforge.inria.fr [mailto:pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of Michael van der Gulik Sent: Wednesday, March 25, 2009 4:39 PM To: Pharo-project(a)lists.gforge.inria.fr Subject: Re: [Pharo-project] Fwd: [vwnc] Would you start a new Smalltalk?project today? On 3/26/09, Markus Fritsche <fritsche.markus(a)gmx.net> wrote: > Igor Stasenko <siguctua(a)gmail.com> wrote: > >> | array sum1 sum2 | >> sum1 := 0. sum2 := 0. >> array := Array new: 10. >> [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: >> 10) ] ] fork. >> [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: >> 10) ] ] fork. >> 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ]. > > Something I came across leately: Threads are evil - > http://www.eecs.berkeley.edu/Pubs/TechRpts/2006/EECS-2006-1.pdf They're not evil, just mischievous. I find it a fairly unimpressive article that recites what any decent programmer already knows about parallel programming. "This scenario is bleak for computer vendors: their next generation of machines will become widely known as the ones on which many programs crash." heh. True. Gulik. -- http://gulik.pbwiki.com/ _______________________________________________ Pharo-project mailing list Pharo-project(a)lists.gforge.inria.fr http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project

March 25, 2009

Re: [Pharo-project] Fwd: [vwnc] Would you start a new Smalltalk?project today?

by Igor Stasenko

2009/3/25 Michael van der Gulik <mikevdg(a)gmail.com>: > On 3/26/09, Markus Fritsche <fritsche.markus(a)gmx.net> wrote: >> Igor Stasenko <siguctua(a)gmail.com> wrote: >> >>> | array sum1 sum2 | >>> sum1 := 0. sum2 := 0. >>> array := Array new: 10. >>> [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ] ] >>> fork. >>> [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ] ] >>> fork. >>> 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ]. >> >> Something I came across leately: Threads are evil - >> http://www.eecs.berkeley.edu/Pubs/TechRpts/2006/EECS-2006-1.pdf > > They're not evil, just mischievous. > > I find it a fairly unimpressive article that recites what any decent > programmer already knows about parallel programming. > > "This scenario is bleak for computer vendors: their next generation of > machines will become widely known as the ones on which many programs > crash." > > heh. True. > hehe -- To offer a third analogy, a folk definition of insanity is to do the same thing over and over again and to expect the results to be different. By this definition, we in fact require that programmers of multithreaded systems be insane. Were they sane, they could not understand their programs. -- a spin loop is very good illustration of it: self locked whileTrue:[ self wait ] :) > Gulik. > > -- > http://gulik.pbwiki.com/ > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project > -- Best regards, Igor Stasenko AKA sig.

March 25, 2009

Re: [Pharo-project] Issue 657

by Rob Rothwell

Trial and error has this working for me: aboutThisSystem "Identify software version" ^ self inform: self systemInformationString withCRs extent: 680 @ 575. Does Squeak handle different resolution displays "uniformly?" Is it like working with twips or anything? Or, are these just pixels? Thanks! Rob On Wed, Mar 25, 2009 at 6:35 PM, Rob Rothwell <r.j.rothwell(a)gmail.com>wrote: > Worked great but the Ok button is gone now! > > Rob > > 2009/3/25 HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> > >> http://code.google.com/p/pharo/issues/detail?id=657 >> >> _______________________________________________ >> Pharo-project mailing list >> Pharo-project(a)lists.gforge.inria.fr >> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >> > >

March 25, 2009

Re: [Pharo-project] Issue 657

by Rob Rothwell

Worked great but the Ok button is gone now! Rob 2009/3/25 HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> > http://code.google.com/p/pharo/issues/detail?id=657 > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >

March 25, 2009

[Pharo-project] Issue 657

by HernÃ¡n Morales Durand

http://code.google.com/p/pharo/issues/detail?id=657

March 25, 2009

Re: [Pharo-project] Fwd: [vwnc] Would you start a new Smalltalk?project today?

by Michael van der Gulik

On 3/26/09, Markus Fritsche <fritsche.markus(a)gmx.net> wrote: > Igor Stasenko <siguctua(a)gmail.com> wrote: > >> | array sum1 sum2 | >> sum1 := 0. sum2 := 0. >> array := Array new: 10. >> [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ] ] >> fork. >> [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ] ] >> fork. >> 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ]. > > Something I came across leately: Threads are evil - > http://www.eecs.berkeley.edu/Pubs/TechRpts/2006/EECS-2006-1.pdf They're not evil, just mischievous. I find it a fairly unimpressive article that recites what any decent programmer already knows about parallel programming. "This scenario is bleak for computer vendors: their next generation of machines will become widely known as the ones on which many programs crash." heh. True. Gulik. -- http://gulik.pbwiki.com/

March 25, 2009

Re: [Pharo-project] Fwd: [vwnc] Would you start a new Smalltalk?project today?

by Markus Fritsche

Igor Stasenko <siguctua(a)gmail.com> wrote: > | array sum1 sum2 | > sum1 := 0. sum2 := 0. > array := Array new: 10. > [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ] ] fork. > [ 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ] ] fork. > 1 to: 10000000 do: [ :i | array at: (10 random) put: (Array new: 10) ]. Something I came across leately: Threads are evil - http://www.eecs.berkeley.edu/Pubs/TechRpts/2006/EECS-2006-1.pdf

March 25, 2009

Re: [Pharo-project] Another MIME-related problem

by Igor Stasenko

2009/3/25 Michael Rueger <m.rueger(a)acm.org>: > Igor Stasenko wrote: >> Image is pharo-dev #10259 >> >> Try following: >> >> (Installer monticello http: 'http://scribo.aidaweb.si/repository') >> install: 'Scribo-np.172'. >> >> it says that 'unknown' mime type is invalid. >> I don't sure if it problem on a server side - Aida, or its because of >> changes to MIME.. >> >> Are 'unknown' mime type string is valid mime type? > > AFAIK it is not a legal mime type, so it is a server side problem. It > should return a default mime type like application/octet-stream. > > Having said that, I've changed the code so it converts 'unkown' into > 'application/octet-stream'. Available in the inbox as > NONO! If MIME standard says its illegal - let it be illegal. I think this is fair to force devs to follow standards. What i can guess, that maybe there is no need to throw an error: i.e. if content-type is malformed, it can simply do: ^self main: mimeString sub: '' parameters: '' in #fromMIMEString: method. because i think nothing bad will happen later - if content type is unknown , then all applications who care about it will anyways be forced to use them as a simple octet stream. Monticello doesn't care about proper MIME type, and it can continue running without any problems (this is what i actually did - returned (self main: mimeString sub: '' parameters: '') using debugger to install the needed package despite the error with MIME). > Network-MIME-michael_rueger.8 > > > Michael > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project > -- Best regards, Igor Stasenko AKA sig.

March 25, 2009

Re: [Pharo-project] Unicode merge

by Damien Cassou

On Wed, Mar 25, 2009 at 2:58 PM, Michael Rueger <m.rueger(a)acm.org> wrote: > SLICE-UnicodeRwrite1-michael_rueger.1 (unchanged) > SLICE-UnicodeRewrite2-5.mcm (updated) Loading went fine but only '?' appear in the workspace when entering accented characters. Your one-click image worked fine. I launched the image with: squeak -encoding UTF-8 Pharo0.1Core-10259.image but only *after* having loaded your slices. I'm on Ubuntu Linux 8.10. -- Damien Cassou http://damiencassou.seasidehosting.st

March 25, 2009

Re: [Pharo-project] Another MIME-related problem

by Michael Rueger

Igor Stasenko wrote: > Image is pharo-dev #10259 > > Try following: > > (Installer monticello http: 'http://scribo.aidaweb.si/repository') > install: 'Scribo-np.172'. > > it says that 'unknown' mime type is invalid. > I don't sure if it problem on a server side - Aida, or its because of > changes to MIME.. > > Are 'unknown' mime type string is valid mime type? AFAIK it is not a legal mime type, so it is a server side problem. It should return a default mime type like application/octet-stream. Having said that, I've changed the code so it converts 'unkown' into 'application/octet-stream'. Available in the inbox as Network-MIME-michael_rueger.8 Michael

March 25, 2009