Squeak-dev May 2001

squeak-dev@lists.squeakfoundation.org

143 participants
597 discussions

Re: Subscripts and Superscripts
by Alan Kay 02 May '01

02 May '01

They used to work (years ago), maybe Dan remembers .... Cheers, Alan ------ At 10:21 PM +0200 5/2/01, Bert Freudenberg wrote: >On Tue, 1 May 2001, Keith Hodges wrote: > >> Are subscripts and superscripts supported. > >Not that I know of. > >> I had a look in Text and could see the the instance variables subscript >> and superscript, but I could not see how to use them. > >I didn't see these in Text, but in StrikeFont. And they are unused. > >-- Bert

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Re: Plugin Versioning Woes?
by Michael Rueger 02 May '01

02 May '01

Mark Guzdial wrote: > > There are already some versioning problems with the Squeak plugins, > it seems to me. Our ImgEd Swiki and Equation Editor plugin for > Swikis are based on the U. Magdeburg plugin, which is incompatible > with the Squeakland plugin. Already, some of the Squeaklets on Bob's > SuperSwiki only work with older Squeak versions. Welcome to world of forks ;-) Seriously, the plugin images have been trailing the mainstream Squeak versions for a while mainly because nobody has set up an update stream directed at them. Bert, Russel and I have setup plugin download pages but they never where maintained that well (at least mine wasn't :-( ). > Are there any plans for how to deal with the versioning/compatibility > problems? How can we build Squeaklets that will work across versions > of the plugin? Hopefully new versions of the plugin image will backward compatible, but there always be glitches I'm afraid. IMHO the best solution is to keep a somewhat stable version of the plugin and make sure you develop Squeaklets that work on this know common Squeaklet platform. The Squeakland plugin could be this common Squeaklet platform, it will maintain its own update stream and try to be reasonably backward compatible. As it is aimed at "end users" it will be more stable than the mainstream Squeak but also always lacking some of the latest and greatest things in the alpha/beta tester stream. Although the Squeakland plugin is somewhat associated with the Squeakland web site it is basically still a generic image with only a couple of things turned off or removed. We are working on how to add the removed/additional classes back in on demand, so the limitations of current version are not forever. > Are there any plans to put auto-updating into the base plugin images > so that Squeaklets two years from now don't have to add a couple of > Mb of source to update the (then) old and obsolete 3.1 image? (But The way Squeakland is working (will be working starting sometime today!! :-) ) is that it checks for updates and gives the user the choice to run the updates. It will also check for a new plugin vm and offer installers when available. Users downloading for the first time will always get a fully updated image and plugin vm. Michael

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Re: newbie: nice text file
by Brent Pinkney 02 May '01

02 May '01

Hi, According to Adreas Raab on 10 July 1997 in message 9707 to this list (Google is amazing) 1. Change FileStream class>>concreteStream to return CrLfFileStream. Now to work and save your code in a file stream, recall that all text areas in Sqeauk can be used to excute code. 2. Using the file list create a new file, say doit.st. 3. Open the file using the file open menu. This will open a new purple window with the contents of your file. This looks similar to a workspace. 4. Edit text, inspect, display etc to your hearts content. 5. To save, use alt-s (cmd-s on Mac ?) 6. Squeak will prompt you to overwrite doit.st. Alas I have not investigated how to remove this prompt. This file can now be opened with a conventional DOS editor like notepad and the contents have the expected CRLF newlines. Note. If you use the 'view as hex' menu option in the file viewer, you will only see the 0d (CR). The CRLFFileStream strip the LF off when reading and inserts it when writing the file. Smart stuff. Cheers Brent ----------------------------------------------------------------- Visit our Internet site at http://www.reuters.com Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Reuters Ltd.

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RE: SortedCollection
by Stephen Pair 02 May '01

02 May '01

You could also define ordering methods on your objects for the more complex cases: Person>>preceedsByLastNameAndAge: otherPerson ^(self lastName = otherPerson lastName) ifTrue: [ self age <= otherPerson age ] ifFalse: [ self lastName < otherPerson lastName ] ...and the sort block would be: [ :a :b | a preceedsByLastNameAndAge: otherPerson ] - Stephen > -----Original Message----- > From: Hans-Martin Mosner [mailto:hm.mosner@cityweb.de] > Sent: Wednesday, May 02, 2001 2:59 PM > To: squeak(a)cs.uiuc.edu > Subject: Re: SortedCollection > > > Just give it a sort block that compares with > or >= instead of <= > > In Smalltalk, SortedCollections compare their elements using a block, > which defaults to [:a :b | a <= b]. > For every two elements x,y of the collection, x comes before y when > sortBlock value:x value: y > returns true. > So by using a sortBlock of [:a :b | a >= b] you sort in descending > order. > > There are various ways of setting the sortBlock of a SortedCollection: > > - You can give a new sortBlock to an existing collection: > someSortedCollection sortBlock: [:a :b | a >= b]. > - You can create a SortedCollection with the right sortBlock, for adding > elemtns later: > someSortedCollection := SortedCollection sortBlock: [:a :b | a >= b]. > - You can make a SortedCollection from an existing collection of > objects: > someSortedCollection := someArbitraryCollection asSortedCollection: > [:a :b | a >= b] > > This should get you started... :-) > > More sorting tips: > > If you want to sort complex objects by some attribute, that's very easy, > too: > [:a :b | a firstName <= b firstName] > will sort ascending to firstName. Of course all elements of the > collection must understand that message. > > You can also sort by more than one attribute: > [:a :b | a lastName = b lastName ifTrue: [a age <= b age] ifFalse: [a > lastName < b lastName]] > will sort by lastName first, and within equal lastNames, will sort by > age. > That gets pretty complicated for more than two attributes, though... > > Cheers, > Hans-Martin > > Jeff Shipman wrote: > > > I would like to do a descending sort on a > > SortedCollection. How could I do this? > > > > Jeff "Shippy" Shipman E-Mail: shippy(a)nmt.edu > > Computer Science Major ICQ: 1786493 > > New Mexico Institute of Mining and Technology > > Homepage: http://www.nmt.edu/~shippy >

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Re: Plugin Versioning Woes?
by Karl Ramberg 02 May '01

02 May '01

I think Mark mean the Squeak-as-Nestscape-plugin. Maybe I'm mistaken ? Karl Tim Rowledge wrote: > > Mark Guzdial <guzdial(a)cc.gatech.edu> is widely believed to have written: > > > There are already some versioning problems with the Squeak plugins, > > it seems to me. > [snip] > Well, at least some of this was thought out at the beginning of the > plugins story. If you look at the implementations of setInterpreter you > will see that it checks for the matching major version and >= minor > version between the vm core and the plugin. The idea is (roughly > speaking) that plugins are expected to be compatible with any vm of the > same major number and at least as high minor number. Of course, this > doesn't provide any versioning of the plugin that can help you work out > which one of several copies is the 'best'. The module name string should > normally have a compilation date in it which could be examined, but even > that is only a mild indicator of 'goodness'. > > tim > -- > Tim Rowledge, tim(a)sumeru.stanford.edu, http://sumeru.stanford.edu/tim > Useful Latin Phrases:- Furnulum pani nolo = I don't want a toaster.

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SortedCollection
by Jeff Shipman 02 May '01

02 May '01

I would like to do a descending sort on a SortedCollection. How could I do this? Jeff "Shippy" Shipman E-Mail: shippy(a)nmt.edu Computer Science Major ICQ: 1786493 New Mexico Institute of Mining and Technology Homepage: http://www.nmt.edu/~shippy

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Re: Squeak install problem: Where do I go for help?
by Bruce ONeel 02 May '01

02 May '01

Hi, Thanks for trying squeak. I tend to respond badly (ie slowly) to email so you might want to ask in the future on the squeak email list who I CCed above. There should have been a binary executable named squeak in the .tar.gz you downloaded. Try running that by typing ./squeak followed by the name of the .image file, ie, squeak3.0-3122.image. cheers bruce john <john(a)johnknight.com> wrote: > I downloaded Squeak3.0pre2-x86linux-full.tar.gz. gzip and tar worked. > My uname -a is > Linux johnhome 2.2.16-3 #1 Mon Jun 19 18:10:14 EDT 2000 i486 unknown > > Instruction was to launch the VM and image at the same time. I did not > unsderstand > this instruction so I tried > System.so Squeak3.0final.image

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newbie: nice text file
by Jeff Shipman 02 May '01

02 May '01

I'm writing a simple program using Squeak for a Principles of Programming Languages assignment. Everything seems to be going pretty good. I'm basically writing a small script in the Workspace window and then submitting that code. Whenever I go to Yellow->More->Save Contents to file the file that is produced has a bunch of ^M's in it instead of carriage returns. So, the code doesn't look very pretty. Is this because of some DOS formatting or some such? How can I alleviate this problem? Also, is there a way to "Quick-Save" this file so I don't have to type in its filename each time? (It defaults to Workspace.text). I'm using Squeak under Linux on an i686. Thanks in advance, Jeff "Shippy" Shipman E-Mail: shippy(a)nmt.edu Computer Science Major ICQ: 1786493 New Mexico Institute of Mining and Technology Homepage: http://www.nmt.edu/~shippy

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RE: Mouse buttons 2/3 switched on linux (squeak 3.0)
by Raab, Andreas 02 May '01

02 May '01

> Yes, that's the way I want it to be. Sadly on my machine > yellow and right is swapped... Press F2, choose "use 3 button mapping", and be happy again ;-) Cheers, - Andreas

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multiple lines
by Jeff Shipman 02 May '01

02 May '01

I have a for loop that I would like to break into multiple lines because it's somewhat big. Is there a way to break things inside of a for loop into mutliple lines? Thanks, Jeff "Shippy" Shipman E-Mail: shippy(a)nmt.edu Computer Science Major ICQ: 1786493 New Mexico Institute of Mining and Technology Homepage: http://www.nmt.edu/~shippy

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