Squeak-dev January 2006

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164 participants
300 discussions

RE: Addendum: Long closedown times
by Cowdery, Bob [UK] 04 Jan '06

04 Jan '06

> On 1/4/06, Bob.Cowdery(a)cgi-europe.com <Bob.Cowdery(a)cgi-europe.com> wrote: > Behavior is the same under Windows and Linux using the same image (i.e. > my working image). > You may wish to see how much you can delete from a copy of that image, > while still retaining the odd behavior. Good luck with it! --Tom > Phoenix Anyone got a white coat, this is just bizarre. I did what you suggested by copying my Linux image and then stripping it out. To start with there was no difference, then suddenly it started to close quickly. I ended back with my original image and without touching it, it now closes in a few seconds! As if that's not bizarre enough I then went to my Windows box and that closed in seconds as well. I have heard of quantum entanglement but no one has ever mentioned Squeak entanglement! I know it's a smart system but this is spooky. Seriously, the only possible explanation I can offer is something to do with Opera as that is the only thing that could possibly have affected both systems. Bob *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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RE: Addendum: Long closedown times
by Bob.Cowdery＠CGI-Europe.com 04 Jan '06

04 Jan '06

> On 1/4/06, Cowdery, Bob [UK] <Bob.Cowdery(a)cgi-europe.com> wrote: > This is odd. It seems that the save is always fast but the quit takes > 3-4 minutes. If I quit via the window close and click no-save, its gone. > If I use the menu to quit and click no-save it takes for ever. Why!! > It's baffling, I'll give you that. > Could you try the same image with a different VM, or even on a > non-Windows machine? It would be a good start to know that the bug > doesn't rely on anything outside your image -- even though the image > itself remains a large place to search for bugs. Behavior is the same under Windows and Linux using the same image (i.e. my working image). It's a little quicker under Linux, about 2 minutes. Using the (more or less) original full image of 3.8 it shuts down in a few seconds. I guess the next thing to do would be to file-in my stuff into a clean image and see how that behaves. As there is no detectable CPU activity on Squeak I would guess it is waiting on something. -- Bob *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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SQL close connection falure
by Marcus Pedersén 04 Jan '06

04 Jan '06

Hi! I have made an app. that connects to an SQL-server. I use class ODBCConnection to connect and it connects allright but when I want to close the connection I can't!! I have tried message: closeNotFail close shutDown finalize unregisterForFinalation; finalatize. But message isConnected returns true everytime! What am I doing wrong??? Many thanks in advance! Marcus

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RE: SelectCase
by Ramon Leon 04 Jan '06

04 Jan '06

How about... (Dictionary new) at: $c put: [self copy]; at: $x put: [self cut]; at: $v put: [self paste]; at: keyPressed ifAbsent:[]. > -----Original Message----- > From: squeak-dev-bounces(a)lists.squeakfoundation.org > [mailto:squeak-dev-bounces@lists.squeakfoundation.org] On > Behalf Of Chris Muller > Sent: Wednesday, January 04, 2006 12:29 PM > To: squeak-dev(a)lists.squeakfoundation.org > Subject: Re: SelectCase > > I agree with your sentiments, but then I came across one case > (after ten years!) where, to my shock-and-awe (tm), case > seemed appropriate. I'm interested in what you think a good > alternative might be that also pays for its weight.. > > A key-command handler method. > > keyPressed caseOf: > {[$c]->[self copy]. > [$x]->[self cut]. > [$v]->[self paste]} > > What's the best way other than case statement to map > keyPressed to the desired action? > > Regards.. > > > Message: 24 > > Date: Wed, 04 Jan 2006 03:38:39 -0800 > > From: Andreas Raab <andreas.raab(a)gmx.de> > > Subject: Re: SelectCase > > To: The general-purpose Squeak developers list > > <squeak-dev(a)lists.squeakfoundation.org> > > Message-ID: <43BBB3BF.70801(a)gmx.de> > > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > > Ragnar Hojland Espinosa wrote: > > >>I know select/case statements is not desired in > > the squeak community > > >>and I understand why (it's often a wrong > > modelisation). But I put > > >>an implementation in squeaksource which can be > > used like this : > > >> > > >>(aString selectCase ) > > >> testBlock: [:ref :case | case match: ref]; > > >> case: 't*' exec: [self assert: false]; > > >> case: 'v*' exec: [self assert: true]; > > >> case: 'value' exec: [self assert: false]; > > >> default: [^ nil] > > >> > > >>#testBlock: and #default: can be ommited. > > > > > > What's wrong with > > > > > > http://wiki.cs.uiuc.edu/CampSmalltalk/Smalltalk+case-statement > > ? > > > > Nothing. I think it sucks just about as much as the above > ;-) And, oh, > > did you know that Squeak has had a case statement for ages? > I've never > > seen it used in any code but, in theory, it works like this: > > > > aString caseOf: { > > ['foo'] -> [self foo]. > > ['bar'] -> [self bar]. > > } otherwise:[self frobler]. > > > > And there is nothing wrong with this either, and yes, it > sucks just as > > much as the other variants ;-) And just in case you haven't guessed > > it: > > "Classic" case statements (those based purely on > > equality) can *always* > > be represented by a simple dictionary lookup, e.g, instead of the > > above you might as well write: > > > > map := Dictionary new. > > map at: 'foo' put: [self foo]. > > map at: 'bar' put: [self bar]. > > elseBlock := [self mumble]. > > result := (map at: aString ifAbsent:[elseBlock]) value. > > > > and if you don't like that, stick the map into a class var > and replace > > it with something roughly equivalent to: > > > > ^(SwitchMap at: aString ifAbsent:[whatever]) value. > > > > In any case, I doubt the existence of YACI (yet another case > > implementation) will change much. It's bad style to begin with and > > it's easy enough (actually trivial) to simulate by using > objects. The > > one case implementation I'd really like is one that > actually *reads* > > well (e.g., one that doesn't look like reverse polish > > notation) but for > > obvious reasons that would require quite a bit of compiler support. > > > > Cheers, > > - Andreas > > >

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Addendum: Long closedown times
by Cowdery, Bob [UK] 04 Jan '06

04 Jan '06

This is odd. It seems that the save is always fast but the quit takes 3-4 minutes. If I quit via the window close and click no-save, its gone. If I use the menu to quit and click no-save it takes for ever. Why!! Has anyone else noticed this. Bob ---------- I am starting to see very long closedown times (quite and save). A snapshot save is very quick (5 second or so) but quit and save takes over 4 minutes now on Windows. This seems to be getting longer on each session although I only have about the same number of objects active. There is no CPU activity except for a few spikes. It also seems to be much longer on Windows than on Linux but I note the Linux times are also increasing. Anyone any idea what would cause this behavior? *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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SqueakMap2, Kabungu and KomPackageBuilder dependencies management
by Samir Saidani 04 Jan '06

04 Jan '06

Happy new years all ! I'm digging right now on the way each of these packages, SM2, Kabungu and KomPackageBuilder tried to manage dependencies. I feel that each of one introduce some interesting idea, and I'm wondering in which extent they could work together. KomPackageBuilder: (see KomPackaging) - packages to load with an url format, I like the idea but KomPackage introduced new protocols like sqmap:// and sqpkg:// not necessary to my sense, something with http:// must be sufficient (and does not introduce too much Comanche-specific stuff). - notion of optionalPackages and prerequisite, you tell in your MyClassInfo which kind of prerequisite must be done, in an array format : #('PackageRequired' 'http://www.squeaksource.com/PackageRequired-xy.12.mcz') Kabungu: - lot of work done to handle dependencies issues, but as far as I understand the code, the dependencies are setting up in a centralized way. I personally think that it's wrong, each package must know what are its own dependencies, this should be not the role of a single package. SqueakMap2: - not clear for me how it handles dependencies right now, it seems that it's not possible yet, but guess that göran is working hard to get something on. Monticello is also managing dependencies, but is not 'url-oriented', it put every dependencies on the same repositories to handle dependencies. Since a lot of people are working with Monticello and squeakmap, maybe the way of managing dependencies should converge in a way or another. I noticed that PackageInfo seems to be the common point of all these packages, so I'm wondering if we should agree to use PackageInfo as the common platform to collaborate around the dependencies issues ? Or is it not the right place ? Samir

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RE: Adding a new imediate type
by Peter Crowther 04 Jan '06

04 Jan '06

> From: [...] Joerg Beekmann > Can anyone comment on how much work would be involved in > 1) Adding a new 32bit field to the object header Nasty. I tried it back in the 2.2 days, and failed. My biggest problem was getting the garbage collector stable. > 2) Adding a new immediate type like integer, presumable by adding > another tag bit. Also nasty - there aren't any more tag bits, and tweaking with the header format also involves the GC. If you're going to do this, look at the compact classes instead and see whether you can make yours compact. Last I looked, I think there were a couple of spares. Note that changes to compact classes did *not* involve image format or VM changes last I looked. > Do these tasks involve > tracking down a bunch of constants and then rebuilding everything, > tedious but a with a known path to follow. Or will this > involve much more. Much, much more. - Peter

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[TUTORIAL] Spanish how You could do a Christmas Card in Squeak
by Lic. Edgar J. De Cleene 04 Jan '06

04 Jan '06

I know what Spanish is not the most usual human language here, but I do for my students/group. It's a excuse for you find any kid what understand Spanish and you teach Squeak to he/she , or the opposite :=) http://ar.geocities.com/edgardec2001/NavidadMorph.htm Edgar ___________________________________________________________ 1GB gratis, Antivirus y Antispam Correo Yahoo!, el mejor correo web del mundo http://correo.yahoo.com.ar

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Conversion to float array
by Cowdery, Bob [UK] 04 Jan '06

04 Jan '06

I am reading a sequence of bytes from a pipe. The data is actually 32 bit float values. Is there an easy and efficient way to convert the byte array to a float array. Just doing asFloatArray not surprisingly gives me an array with each byte converted to a float and what I want is each 4 bytes converted to a float. Any help appreciated. Thanks Bob *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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Walkback when opening SM in 3.8
by Vaidotas Didžbalis 03 Jan '06

03 Jan '06

Opening squeak map in virgin 3.8-6665, VM 3.7.1 Squeak offers to upgrade SM. I select No and get this: MessageNotUnderstood: UndefinedObject>>select: 3 January 2006 7:42:15 pm VM: Win32 - a SmalltalkImage Image: Squeak3.8 [latest update: #6665] SecurityManager state: Restricted: false FileAccess: true SocketAccess: true Working Dir D:\squeak38 Trusted Dir D:\squeak38\Ligita Untrusted Dir C:\My Squeak\Ligita UndefinedObject(Object)>>doesNotUnderstand: #select: Receiver: nil Arguments and temporary variables: aMessage: select: [] in SMSqueakMap>>categories {[:o | o isCategory]} Receiver's instance variables: nil SMSqueakMap>>categories Receiver: a SMSqueakMap Arguments and temporary variables: o: nil Receiver's instance variables: packages: nil accounts: nil objects: nil categories: nil dir: 'sm' transactionCounter: 0 firstTransactionNumber: nil daysBacklog: 182 adminPassword: nil installedPackages: a Dictionary(an UUID('26bea8bf-733f-4715-b188-fa6d848984ad')...etc... installCounter: 12 fileCache: a SMFileCache users: nil mutex: nil dirtyList: nil isDirty: false checkpointNumber: 0 silent: nil SMLoader>>categoryWrapperList Receiver: a SMLoader(2364) Arguments and temporary variables: list: nil first: nil each: nil c1: nil c2: nil any: nil cat: nil Receiver's instance variables: bounds: 0@0 corner: 300@200 owner: nil submorphs: #(an AlignmentMorph(450) a PluggableTextMorph(1744) a SimpleHierarch...etc... fullBounds: nil color: Color white extension: a MorphExtension (3415) [eventHandler = an EventHandler; mouseEnterS...etc... borderWidth: 2 borderColor: #raised model: nil slotName: nil open: false labelString: 'SqueakMap Package Loader (0/0)' stripes: #(a RectangleMorph(3081) a RectangleMorph(606)) label: a StringMorph(508)'SqueakMap Package Loader (0/0)' closeBox: an IconicButton(3677) collapseBox: an IconicButton(3154) activeOnlyOnTop: true paneMorphs: #(a SimpleHierarchicalListMorph(3477) a PluggableTextMorph(1744)) paneRects: nil collapsedFrame: nil fullFrame: 0@0 corner: 300@200 isCollapsed: false menuBox: an IconicButton(2275) mustNotClose: false labelWidgetAllowance: 91 updatablePanes: #() allowReframeHandles: true labelArea: an AlignmentMorph(450) expandBox: an IconicButton(842) squeakMap: a SMSqueakMap packagesList: #() selectedItemWrapper: nil selectedCategoryWrapper: nil filters: an OrderedCollection() categoriesToFilterIds: an OrderedCollection() SimpleHierarchicalListMorph>>getList Receiver: a SimpleHierarchicalListMorph(1067) Arguments and temporary variables: Receiver's instance variables: bounds: 0@0 corner: 150@120 owner: nil submorphs: #(a ScrollBar(3661) a TransformMorph(2787)) fullBounds: nil color: Color transparent extension: a MorphExtension (2233) [eventHandler = an EventHandler recipients: ...etc... borderWidth: 1 borderColor: Color black model: a SMLoader(2364) slotName: nil open: false pinSpecs: nil scrollBar: a ScrollBar(3661) scroller: a TransformMorph(2787) retractableScrollBar: false scrollBarOnLeft: false getMenuSelector: #categoriesMenu: getMenuTitleSelector: nil scrollBarHidden: nil hasFocus: false hScrollBar: a ScrollBar(2235) selectedMorph: nil getListSelector: #categoryWrapperList keystrokeActionSelector: nil autoDeselect: true columns: nil sortingSelector: nil getSelectionSelector: #selectedCategoryWrapper setSelectionSelector: #selectedCategoryWrapper: potentialDropMorph: nil lineColor: nil --- The full stack --- UndefinedObject(Object)>>doesNotUnderstand: #select: SMSqueakMap>>categories SMLoader>>categoryWrapperList SimpleHierarchicalListMorph>>getList - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - SimpleHierarchicalListMorph>>on:list:selected:changeSelected:menu:keystroke: SimpleHierarchicalListMorph class>>on:list:selected:changeSelected:menu:keystroke: SMLoader>>buildMorphicCategoriesList SMLoader>>createWindow SMLoader class>>open TheWorldMenu>>doMenuItem:with: [] in MenuItemMorph>>invokeWithEvent: {[(selArgCount := selector numArgs) = 0 ifTrue: [target perform: selector] ...]} BlockContext>>ensure: CursorWithMask(Cursor)>>showWhile: MenuItemMorph>>invokeWithEvent: MenuItemMorph>>mouseUp: ...etc... -- Vaidotas Didžbalis

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