Squeak-dev February 2000

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163 participants
655 discussions

Re: [CCC] Object class comment
by John-Reed Maffeo 28 Feb '00

28 Feb '00

Dwight, The original comment threw me because I was not aware of ProtoObject from the studying that I have done. I would modify the first two paragraphs as follows: --- start Object is the root class for almost all of the other classes in the class hierarchy. The exceptions are ProtoObject (the superclass of Object) its subclasses. Class Object provides default behavior common to all normal objects, such as access, copying, comparison, error handling, message sending, and reflection. Also utility messages that all objects should respond to are defined here. --- end John-Reed Maffeo Mesa, Az

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RE: How Do You Do Business Apps?
by Warren Postma 28 Feb '00

28 Feb '00

>One *waaaaaay* more portable than Tk (which, sadly, on the mac side is >quite lacking). Tk is ugly, heavy, and not a lot of fun (IMHO, of >*course*). And I, personally, wouldn't want to program it. Doesn't run on >handhelds, either. And it violates the Squeak philospohy. I haven't really gotten to the point where I'd say Squeak, MVC or Morphic is a lot of fun. I think it could be fun, and that's why I'm sticking with it. I may yet also end up learning Tk (tkinter) because at least I could get some trivial apps to run on both Windows and Mac. Beyond that, the parallels between Squeak/MVC/Morphic and Tcl/Tk are many: 1. ugly but have fans who are vociferous in their support, probably because both are tightly bound to a particular language and style of programming. 2. both lack any kind of easy to use gui-builder functionality, which makes it hard for anyone new to adopt them 3. both lack most of the more modern widget types 4. both seem to have adopted the native-look-and-feel of an X-Terminal from the early 1980s, and neither one has been updated to be capable of 'native look and feel' on Mac and Windows. On the other hand, one area where Tk sure beats Squeak on is documentation. Warren

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RE: [ENH] Case independent numbers
by Jarvis, Robert P. (Contingent) 28 Feb '00

28 Feb '00

> -----Original Message----- > From: Jarvis, Robert P. (Contingent) > Sent: Monday, February 28, 2000 2:34 PM > To: 'squeak(a)cs.uiuc.edu' > Subject: RE: [ENH] Case independent numbers > <snip> > To me it's astonishing that numbers vary based on capitalization in bases, <snip> Ahem... I meant, of course, that it's astonishing that numbers vary based on capitalization of letters in the value. Bob Jarvis Compuware @ Timken

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[CCC] ClassBuilder class comment
by Henrik Gedenryd 28 Feb '00

28 Feb '00

--------- Responsible for creating a new class or changing the format of an existing class (from a class definition in a browser or a fileIn). This includes validating the definition, computing the format of instances, creating or modifying the accompanying Metaclass, setting up the class and metaclass objects themselves, registering the class as a global, recompiling methods, modifying affected subclasses, mutating existing instances to the new format, and more. You typically only need to use or modify this class, or even know how it works, when making fundamental changes to how the Smalltalk system and language works. --------- Henrik < = > .

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Re: How Do You Do Business Apps? (Squeak/Pro Proposal)
by demiourgos＠smalltalk.org 28 Feb '00

28 Feb '00

On Mon, 28 February 2000, Gerardo Richarte wrote: > > Warren Postma wrote: > > > Are there *ANY* commercially useful applications written in Squeak? > > > > Are there *ANY* applications written in Squeak that are used by > > non-programmers? [snip] Warren, I don't get it. There are many "commercially useful applications" written in Smalltalk. While Squeak differs a bit, I think most would identify it as Smalltalk. So what if it isn't quite mature yet? It'll get there. If Smalltalk can produce many useful commercial applications "used by non-programmers", then, surely, it is unreasonable to think that eventually Squeak won't be used in a similar way. Right? Gerado, sorry for trampling in on your reply. --Jan __________________________________________________ Jan Theodore Galkowski algebraist.com/ www.whysmalltalk.com/ www.smalltalk.org/ demiourgos(a)smalltalk.org marssociety.org/ ************************************************** PGP Key Fingerprint: 2757 F86D AA51 677D 38D7 964B 9A8D 7852 A494 3790 ************************************************** Get my Public Key from my home page at: http://algebraist.com/ ************************************************** ______________________________________________ Get free e-mail at http://www.britannica.com

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[CCC] TimeProfileBrowser class comment
by G�ran Hultgren 28 Feb '00

28 Feb '00

Another one, yeah, I am picking off the ones that seem easy... :-) (BTW - is it really percentage shown?) : --------------------------------------------- A TimeProfileBrowser is a browser visualizing the runtime profile of an executed Smalltalk block - it is a very helpful tool for finding performance bottlenecks in code. When optimizing code it can be hard to know what methods actually constitute the bulk of the execution time. Is it a few methods that take very long time to execute or is it perhaps a single method that gets executed a thousand times? The block is first spied on using a MessageTally instance (which has even more funtionality than used by the TimeProfileBrowser) which samples the block during it's execution and collects the amount of time approximately spent in the methods executed. Then the methods are shown in the browser with their relative execution time in percent. Example: TimeProfileBrowser onBlock: [20 timesRepeat: [Transcript show: 100 factorial printString]] ------------------------- regards, G�ran ===== G�ran Hultgren, goran.hultgren(a)bluefish.se icq#:6136722, GSM: +46 709 472152, http://www.bluefish.se "First they ignore you. Then they laugh at you. Then they fight you. Then you win." -- Gandhi __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

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[CCC]LimitedWriteStream class comment
by G�ran Hultgren 28 Feb '00

28 Feb '00

Eh, I marked with "< blabla >" where it would be nice with "Command-6->Link to method": ------------------------------ A LimitedWriteStream is a specialized WriteStream that has a maximum size of the collection it streams over. When this limit is reached a special limitBlock is executed. This can for example be used to "bail out" of lengthy streaming operations before they have finished. For a simple example take a look at the universal <Object printString>. Note the message <SequenceableCollection class streamContents:limitedTo:> which creates a LimitedWriteStream. In this case it prevents very large (or possibly recursive) objectstructures to "overdo" their textual representation. ------------------------------ regards, G�ran ===== G�ran Hultgren, goran.hultgren(a)bluefish.se icq#:6136722, GSM: +46 709 472152, http://www.bluefish.se "First they ignore you. Then they laugh at you. Then they fight you. Then you win." -- Gandhi __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

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Re: Process>suspend and resume are still broken...
by C. Gable Watts 28 Feb '00

28 Feb '00

>Just as an aside, killing or suspending threads other than your own >is dangerous and probably shouldn't be done, anyway. I agree that playing with Processes is a good way to screw up ones system UNLESS one really knows what they are doing and is VERY careful to use Processes safely. I've been programming with Processes in Smalltalk for over a decade and I'm VERY careful to use them properly. >So in short, it doesn't look like this is a bug that seriously needs >fixing..... You don't think that two bugs in one of the kernel objects (the most relied-upon objects in the system) is worth fixing? Even when the methods clearly do not do what their comments say they are supposed to do? You wouldn't even amend the comments to note that the implementation has bugs and what they are? You must work for Microsoft. :-) :-) Carl

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[ENH] UpdatingStringMorph extensions
by Stephen T. Pope 28 Feb '00

28 Feb '00

This changes the UpdatingStringMorph target value read/write methods to use (e.g., ) getSelector value: target scriptPerformer instead of target scriptPerformer perform: getSelector so that you can put an arbitrary block in as the "selector." Note that this assumes the symbol-value fileIn I just sent out. -- stp Stephen Travis Pope stp(a)create.ucsb.edu -- http://www.create.ucsb.edu/~stp "Change Set: Symbol-value Date: 23 Feb 2000 Author: Stephen Travis Pope This changes the UpdatingStringMorph target value read/write methods to use (e.g., ) getSelector value: target scriptPerformer instead of target scriptPerformer perform: getSelector so that you can put an arbitrary block in as the 'selector.' Note that this assumes the symbol-value fileIn." 'From Squeak2.8alpha of 13 January 2000 [latest update: #1852] on 28 February 2000 at 9:21:03 am'! !UpdatingStringMorph methodsFor: 'target access' stamp: 'stp 02/26/2000 00:02'! informTarget | newValue | ((target ~~ nil) and: [putSelector ~~ nil]) ifTrue: [newValue _ self valueFromContents. newValue ifNotNil: [putSelector value: target scriptPerformer value: newValue. target isMorph ifTrue: [target changed]]. self fitContents. (owner isKindOf: TileMorph) ifTrue: [owner resizeToFitLabel] "self growable ifTrue: [self readFromTarget; fitContents. owner ifNotNil: [owner updateLiteralLabel]]"]! ! !UpdatingStringMorph methodsFor: 'target access' stamp: 'stp 02/26/2000 00:01'! readFromTarget | v | ((target == nil) or: [getSelector == nil]) ifTrue: [^ contents]. v _ getSelector value: target scriptPerformer. ^ self acceptValueFromTarget: v! !

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[ENH] Symbol value:
by Stephen T. Pope 28 Feb '00

28 Feb '00

Adds the methods value: and value:value: to Symbol (which do #perform: and #perform:with:, respectively) so that symbols can be interchanged with blocks. -- stp Stephen Travis Pope stp(a)create.ucsb.edu -- http://www.create.ucsb.edu/~stp "Change Set: Symbol-value Date: 23 Feb 2000 Author: Stephen Travis Pope Adds the methods value: and value:value: to Symbol (which do #perform: and #perform:with:, respectively) so that symbols can be interchanged with blocks." 'From Squeak2.8alpha of 13 January 2000 [latest update: #1852] on 20 February 2000 at 10:54:09 pm'! !Symbol methodsFor: 'converting' stamp: 'stp 02/20/2000 22:54'! value: anObject "Perform the receiver symbol on the argument object, i.e., #r value: (3@4) is the same as [ :pt | pt r] value: (3@4) " ^anObject perform: self! ! !Symbol methodsFor: 'converting' stamp: 'stp 02/20/2000 23:56'! value: anObject value: otherObject "Perform the receiver symbol on the argument object, i.e., #truncateTo: value: (32@44) value: 5@5 is the same as [ :pt :off | pt truncateTo: off] value: (32@44) value: 5@5 " ^anObject perform: self with: otherObject! !

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