Squeak-dev August 2005

squeak-dev@lists.squeakfoundation.org

157 participants
234 discussions

REMINDER: Squeak Chat Sunday August 7th 21:00 GMT
by Ken Causey 06 Aug '05

06 Aug '05

Just a reminder that the next Squeak Chat will take place between 21:00 (9 PM) GMT Sunday August 7th and 01:00 (1 AM) GMT Monday August 8th, 2005. As usual we will meet in #squeak on irc.freenode.net. More information about the #squeak IRC channel can be found at http://people.squeakfoundation.org/article/7.html This is a good time to contribute to the development of Squeak by participating in the Harvesting Process. One of the main ways to contribute is by Reviewing submitted fixes and enhancements. For information about the Harvesting Process see http://minnow.cc.gatech.edu/squeak/3152 If you have the time please attend and work toward the future of Squeak. The next seven chats are scheduled for 01:00 (01:00 AM) GMT Friday August 12, 2005 05:00 (05:00 AM) GMT Tuesday August 16, 2005 09:00 (09:00 AM) GMT Saturday August 20, 2005 13:00 (01:00 PM) GMT Wednesday August 24, 2005 17:00 (05:00 PM) GMT Sunday August 28, 2005 21:00 (09:00 PM) GMT Thursday September 01, 2005 01:00 (01:00 AM) GMT Tuesday September 06, 2005

1 0

Re: What do you think about Ruby ?
by Blake 06 Aug '05

06 Aug '05

Ruby is not as "pure" as Smalltalk. I'm far from an expert, but Ruby strikes me as a language made by someone who said, "Wow, Smalltalk is cool. So simple. Look, even loops and branches are done with objects. Ew. Let's make a Smalltalk where the loops and branches are done the usual way. Also, let's drop the image concept." I think the image concept could be improved on, but as far as making traditional loops you add both the complexity and rob yourself of a new way of thinking, which is really where Smalltalk excels. As for the ascendancy of C# and Java over Smalltalk, this was entirely commercial (and to a degree, condescending). Someone willing to pour a few billion into Smalltalk could easily make it a competitor against those langauges. I know Sun dissected Smalltalk pretty thoroughly prior to inventing Java, but why not make it look like C++ so as not to threaten "the masses"? Same with C# which is, in fact, Delphi in C-style dressing. They could've used Smalltalk. Hell, they could've used the P-code system. But Sun and MS wanted control. For better or worse. Perhaps more interesting, and the reason I keep coming back to Smalltalk, is that what was envisioned for it in the beginning still hasn't been reached. Computer languages rise and fall with the ephemeralities of the business world, and Smalltalk chugs along....

2 1

Squeak 3.8 What has happened to "smart tabs"
by Andreas Gerdes 06 Aug '05

06 Aug '05

Hi all, Automatic indentation in Workspace and Browser seemed to be normal behaviour in 3.7, in 3.8 it does not seem to work at all (not even in shout and not even with key combinations). Have I missed sth? Andreas

4 4

memory leak problems
by Ralph Boland 06 Aug '05

06 Aug '05

My Squeak image file has been gradually expanding so that now (after about a years work) it is at 74M. (I switched to 3.8 a couple of weeks ago. The version of the image does not appear to be related to my problem.) I checked the number of instances of each class; at the end I have posted part of the list. The largest is Array with 389647 instances. I have nothing open or active in my image except the standard windows that you get with the initial image. Of note is ParserGenerator with 43 entries. There should be none. ParserGenerator has not had any instances created in several months. Its instances seem to be the result of being referenced by Morphs which have also not been used in months and a methodContexts which are similarly old. Thus my image appears to have a fair number of objects that are not being garbage collected. These objects appear to be connected to either Morphs and methodContexts. (The methodContexts appear to be from doIts and compiles by instances of parserGenerator.) I tried looking at the pointers to the parserGenerators and then the pointers to these pointers etc. but just ran in circles though I did determine that there are morphs (mostly) and methodContexts everywhere. Are there tools that I can use to track down who is failing to break a link to these Morph and methodContext objects when they are no longer in use? In particular a tool to find a path from a global object to to a given object would be useful. Any suggestions as to what useful tools would be are welcome. My next step is to file out all my code and then file it into a new image to free myself of the garbage. I assume all my code should be in a project but I am not sure how projects work. Any documentation on projects anywhere? All my code is in a system category called: '4Neufs' and all (I hope) methods that I have added to System classes are in Class category '*4Neufs'. Thanks Ralph Boland Partial list in sorted order of counts of class instances (in a quiet image): (*'s class are mine) a SortedCollection( 389647->Array 286558->Point 240405->Association 213447->Rectangle 157019->String (Some of these might be from a workspace with a lot of stuff in it) 126390->MorphExtension 103684->*N4BinaryTreeNode 99123->IdentityDictionary 62674->StringMorph 59875->CompiledMethod 54284->Float 43038->OrderedCollection 42717->Symbol 37562->RectangleMorph 34414->*N4DebugToken 33728->EventHandler etc ... 3425->BlockContext 3322->Morph 2712->TextFontChange 2519->*MenuSelectionVisibleMorph (There should be 0 of these) 2510->MenuMorph 2423->BorderedSubpaneDividerMorph 2404->Metaclass 2348->TextStyle 2317->PluggableListMorph 2267->RBMetaclass 2267->RBClass 2121->TextMorphForEditView 2110->PluggableTextMorph 2061->MethodReference 2049->InStateSemiCompact 2022->IdentitySet 2010->ClassChangeRecord 1897->SelectorNode 1651->DependentsArray 1532->StepMessage 1424->*N4IdentityHashArray (There should be 0 of these) 1412->MessageNode 1281->NoteEvent etc ... 43->ParserGenerator (There should be 0 of these) ... ~

2 1

Sounds in 3.7
by Bill Schwab 05 Aug '05

05 Aug '05

Hello all, I am using Dolphin to control an A/D board via Automation. The signals of interest are audio, so I thought it would be nice to arrange to play them back over the sound card. AFAIK, Dolphin's sound capabilities assume one has .wav file, so Squeak came to mind. After some endianness and sign snags, I got it working. Some observations: (1) the .wav files that Squeak saves will not play on my 2k boxes - media player complains about an invalid decompressor; (2) FWIW, I have created a sampled sound that plays differently via #play and choosing the play command on a wave editor, it appears that #viewSamples does not set the sampling rate to match that of the sampled sound.. Bill Wilhelm K. Schwab, Ph.D. University of Florida Department of Anesthesiology PO Box 100254 Gainesville, FL 32610-0254 Email: bills(a)anest4.anest.ufl.edu Tel: (352) 846-1285 FAX: (352) 392-7029

1 0

MP3Plugin crashes VM in Windows but not in Mac OS
by Martin Schütze 05 Aug '05

05 Aug '05

Hi all, Ive cached some mp3 sound streams and want to play them when triggered at various user interactions in the world. Therefore it may occur that some sound files are played while others are not finished. In Mac OS there isnt any problem regarding to this, everything works fine like expected. But in Windows (Win XP) sometimes my VM crashes. These crashes are not repeatable and a prediction when they occur is impossible. So have you any idea why this can happen and maybe can anybody give me a hint whats the reason for these crashes. Thank you in advance. Martin

1 0

Re: Re: [Q] SharedQueue Bug or Feature?
by "S.J.Chun" 05 Aug '05

05 Aug '05

Your advice is great! now it works. But I have some questions: ----- Original Message ----- From: Boris Gaertner <Boris.Gaertner(a)gmx.net> To: The general-purpose Squeak developers list <squeak-dev(a)lists.squeakfoundation.org> Sent: 05-08-05 13:28:54 Subject: Re: Re: [Q] SharedQueue Bug or Feature? > Keep in > mind that we still do not have real blocks: The local variables > of a block are not really local; the compiler moves them into > the method that provides the evaluation environment. Is this normal to smalltalk environment? Or only in Workspace? > It would be interesting to try your example with the > optional block closure package loaded into your image, > but just now I do not have the time to do that - I have to > go to work. I found that Closure Compiler does not work well with eToy, so I cannot try this :-) > Greetings, Boris Thank you very much for your help.

2 1

Re: Squeak networking overview ?
by Chris Muller 05 Aug '05

05 Aug '05

> * Is there a Squeak networking overview anywhere ? > * Also, > i'm having trouble getting the basic Socket examples to work. Hi Orion, I'm not sure about the Socket examples in the image, but another simple example (for client-server style) that I sometimes use as a sanity check that the network is working. You must load "Ma client server" from SqueakMap. It has two simple classes that wrap a Squeak standard Socket. The scripts below demonstrate sending and receiving bytes between both images. "Inspect in the server image, when done execute 'self shutdown'" | serverSocket | serverSocket _ MaServerSocket new server: MaTranscriptConsole new. serverSocket listenOn: 1010 answer: [ :requestByteArray | requestByteArray reverse ]. serverSocket "Open a transcript in client image and run this:" | mySocket requestByteArray response eachResponse randomStream byteArrayRandomizer requestSize serverIp largestTest | largestTest _ 9000. randomStream _ Random new. response _ ByteArray new: 4000. "<- purposely too small" requestByteArray _ ByteArray new: largestTest. byteArrayRandomizer _ [ :size | 1 to: size do: [ :index | requestByteArray at: index put: (randomStream nextInt: 256) - 1 ] ]. serverIp _ FillInTheBlank request: 'Enter the IP of the host:' initialAnswer: '127.0.0.1'. mySocket _ MaClientSocket hostAddress: (NetNameResolver addressFromString: serverIp) port: 1010. 1 to: 500 do: [ :count | requestSize _ (randomStream nextInt: largestTest). byteArrayRandomizer value: requestSize. eachResponse _ mySocket sendData: requestByteArray startingAt: 1 count: requestSize waitForReplyIn: response. (requestByteArray copyFrom: 1 to: requestSize) reverse = (eachResponse copyFrom: 1 to: requestSize) ifFalse: [ self halt ]. Transcript cr; show: count printString, ' successful conversations.' ]

1 0

Re: Re: [Q] SharedQueue Bug or Feature?
by "S.J.Chun" 05 Aug '05

05 Aug '05

1 0

[Q] SharedQueue Bug or Feature?
by Sungijn Chun 05 Aug '05

05 Aug '05

Hi, I'm trying to create producer/consumer example using SharedQueue class. But when I want to fill queue(which is a instance of SharedQueue) with 2 different processes like this: [1 to: 20 do: [ :i | | j | j _ queue nextPut: i. Transcript show: 'Push: ', (i asString), '(', (j asString), ')'; cr ]] fork. [21 to: 40 do: [ :i | | j | j _ queue nextPut: i. Transcript show: 'Push: ', (i asString), '(', (j asString), ')'; cr ]] fork. the queue does not contain entire 40 elements, it just drops some of them randomly. I think SharedQueue can handle this kind of situation but I cannot figure out what is my problem. I'm using 3.8 image in windows and linux. Thanks in advance.

4 3

← Newer
1
...
17
18
19
20
21
22
23
24
Older →

Jump to page: