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• How no make a button show UINavigationBar only in 3 of 5 tabs in UITabBar?

  - by Mike Rychev

  I have an app, where there's a UITabBar with 5 tabs. When user shakes the device, I want the UINavigationBar to push an UIImageView. When I show the UIImageView, I need to hide both tab and nav bars. After that, when user taps the UIImageView, the NavBar appears again and user can go to the UIImageView's parent view. I make the Nav Bar appear like this: [[self navigationController] setNavigationBarHidden:NO animated:YES]; But in two tabs I have to make the Nav Bar appear, so user can switch to UIImageView's parentView and then, when the parent view appears, hide the nav bar. How can I do it?

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• iPhone UIButton Tap

  - by Ivan

  Hello all, I am trying to make a button that response to single and double tap. I am trying to do this using myAction method. The problem is that first time when I press the button the method myAction isn't called. Can somebody tell why this happening and how can I fix that? -(IBAction)myButton:(id)sender{ UIButton *theButton = (UIButton *)sender; [theButton addTarget:self action:@selector(myAction:forEvent:) forControlEvents:UIControlEventAllEvents]; } - (void)myAction:(id)sender forEvent:(UIEvent *)event { NSLog(@"Touch events goes here"); } Thank you, I. Vasilev

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• Is there any need to get a Computer Science degree?

  - by Tom Moseley

  I've been a software developer for 20 years. i've been involved in language development and large data warehouse development. I've worked for start-ups that have gone public, and for government contractors, and I've written a published programming book. My knowledge is either self-taught or on-the-job. I've worked with some of the best and brightest, and they taught me well. I'm back in school now, and am weighing my options, deciding between a Computer Science and a business degree. My question is this. What do I gain, at this point in my career, by earning a Computer Science degree? I just don't know if a Computer Science degree, at this point, is a value-add on my resume. Edit: I'm working on completing an undergraduate degree.

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• Class Type Expected error on TableAdapter constructor

  - by Chris Franz

  I am using Delphi Prism to connect to an Advantage Database Server. I created a connection using the server explorer to the database. I added a dataset object to my project and added a table to the dataset. Everything works fine in the IDE, however, I get an error in the generated designer code on the table adapter constructor. The error is: (PE26) Class type expected. Here is the generated code: { Presidents.PresidentsTableAdapters.USPRESIDENTSTableAdapter } constructor Presidents.PresidentsTableAdapters.USPRESIDENTSTableAdapter; begin self.ClearBeforeFill := true; end;

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• use more then one sound in my iphone application using cocos2d

  - by Rana

  avc = [[MPAVController sharedInstance] avController]; //avc is AVController NSString *path = [[NSBundle mainBundle] pathForResource:@"Sound" ofType:@"wav"]; id feeder = [[MPArrayQueueFeeder alloc] initWithPaths:[NSArray arrayWithObject:path]]; [avc setQueueFeeder:feeder]; [avc play:nil]; [feeder release]; NSTimer *sound = [NSTimer scheduledTimerWithTimeInterval:(9.0) target:self selector:@selector(Gamesoundplay) userInfo:nil repeats:YES]; Hear i use tow framework for playing sound. 1. MediaPlayer.framework 2. AudioToolbox.framework I success to play the background sound with repeat after lodding the game. I also want to play sound after clicking some button action without stop the previous background sound.But when i click the other button that time background sound is stop and start again after time intereval ( 9.0 sec ) which i mention for repeated the sound time line. If anyone do this work then help me to complete my application.

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• NSData to NSString by changing the value null is returned. I need you help

  - by kevin

  *cipher.h, cipher.m all code : http://watchitlater.com/blog/2010/02/java-and-iphone-aes-interoperability Cipher.m -(NSData *)encrypt:(NSData *)plainText{ return [self transform:KCCEncrypt data:plainText; } step1. Cipher *cipher = [[Cipher alloc]initWithKey:@"1234567890"]; NSData *input = [@"kevin" dataUsingEncoding:NSUTF8StringEncoding]; NSData *data = [cipher encrypt:input]; data variables NSLog print : <4d1c4d7f 1592718c fd588cec 84053e35 step2. NSString *changeVal = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; data variables NSLog print : null NSData to NSString by changing the value null is returned. By converting NSString NSURLConnection want to transfer. I need you help

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• Are these AVAudioSettings right?

  - by Dyldo42

  self.recordSettings = [NSMutableDictionary dictionary]; [recordSettings setValue:[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey]; [recordSettings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey]; [recordSettings setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey]; recordSettings is declared in my view's header file and initialised in its viewDidLoad method. For some reason, everything is working in the simulator, but on a device, the [recorder record] method is returning NO. The only theory I have is that something in the recordSettings isn't compatible with an actual device. Any ideas?

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• PHP CLI application debug in ZendStudio (STDIN)

  - by Yuriy

  0 I am trying to debug php CLI using Zend Studio. My problem: I can't get user input from keyboard. This is part of code (method in some class): public function getInput($promt = null, $defaultValue = null) { if(!isset($promt)){ $promt = self::$DEFAULT_PROMPT; } echo $promt; $stdin = fopen ( "php://stdin", "r" ); $val = fgets ( $stdin ); return $val; } So ZS walks through code quite ok, but it stops at $val=fgets() And I have no clue where am I supposed to enter something from keyboard. I tried in console, and everywhere, I chacked debug configuration (Allocate console = on) etc. HELP!

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• Creating a menu using xslt for Umbraco

  - by rob_g

  I've created a menu in umbraco using XSLT. The menu is using the usual ul and li elements and I'm displaying only the first level of the menu. The aim is to create a menu that expands to show the sub menu when I click a parent node (in the top level). I am after the xslt I would need to expose the sub menu when clicked. I think I would need to make use of ancestor-or-self to detect the current menu and parent menu and display them and also the $currentPage variable. I have the following xslt: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxml="urn:schemas-microsoft-com:xslt" xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:tagsLib="urn:tagsLib" xmlns:urlLib="urn:urlLib" exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets tagsLib urlLib "> <xsl:output method="xml" omit-xml-declaration="yes"/> <xsl:param name="currentPage"/> <xsl:template match="/"> <div id="kb-categories"> <h3>Categories</h3> <xsl:call-template name="drawNodes"> <xsl:with-param name="parent" select="$currentPage/ancestor-or-self::node [@level=1]"/> </xsl:call-template> </div> </xsl:template> <xsl:template name="drawNodes"> <xsl:param name="parent"/> <xsl:if test="(umbraco.library:IsProtected($parent/@id, $parent/@path) = 0 or (umbraco.library:IsProtected($parent/@id, $parent/@path) = 1)) and $parent/@level = 1"> <ul class="kb-menuLevel1" > <xsl:for-each select="$parent/node [string(./data [@alias='showInMenu']) = 1]"> <li> <a href="/kb{umbraco.library:NiceUrl(@id)}"> <xsl:value-of select="@nodeName"/> </a> <xsl:variable name="level" select="@level" /> <xsl:if test="(count(./node [string(./data [@alias='showInMenu']) = '1']) &gt; 0)"> <xsl:call-template name="drawNodes"> <xsl:with-param name="parent" select="."/> </xsl:call-template> </xsl:if> </li> </xsl:for-each> </ul> </xsl:if> <xsl:if test="(umbraco.library:IsProtected($parent/@id, $parent/@path) = 0 or (umbraco.library:IsProtected($parent/@id, $parent/@path) = 1)) and $parent/@level &gt; 1"> <ul class="kb-menuLevel{@level}" style="display: none;"> <xsl:for-each select="$parent/node [string(./data [@alias='showInMenu']) = 1]"> <li> <a href="/kb{umbraco.library:NiceUrl(@id)}"> <xsl:value-of select="@nodeName"/> </a> <xsl:variable name="level" select="@level" /> <xsl:if test="(count(./node [string(./data [@alias='showInMenu']) = '1']) &gt; 0)"> <xsl:call-template name="drawNodes"> <xsl:with-param name="parent" select="."/> </xsl:call-template> </xsl:if> </li> </xsl:for-each> </ul> </xsl:if> </xsl:template> </xsl:stylesheet> I suspect this could be improved using apply-templates, but I'm not yet up to speed with that (this being only the second day of my learning xslt). My menu: Item 1 Item 2 Item 3 Item 4 when I click on Item 2 I want to see it's child menu too: Item 1 Item 2 -- Item 2.1 -- Item 2.2 Item 3 Item 4 and so on down the nested menu.

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• Large Scale VHDL modularization techniques

  - by oxinabox.ucc.asn.au

  I'm thinking about implimenting a 16 bit CPU in VHDL. A simplish CPU. ADD, MULS, NEG, BitShift, JUMP, Relitive Jump, BREQ, Relitive BREQ, i don't know somethign along these lines Probably all only working with 16bit operands. I might even cut it down and use only a single operand and a accumulator. With Some status regitsters, Carry, Zero, Neg (unless i use a Accumlator), I know how to design all the parts from logic gates, and plan to build them up from first priciples, So for my ALU I'll need to 'build' a ADDer, proably a Carry Look ahead, group adder, this adder it self is make up oa a couple of parts, wich are themselves made up of a couple of parts. Anyway, my problem is not the CPU design, or the VHDL (i know the language, more or less). It's how i should keep things organised. How should I use packages, How should I name my processes and port maps? (i've never seen the benifit of naming the port maps, or processes)

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• Rapidly prototype GUI's...

  - by Donovan

  G'Day, I am looking to prototype a windows based GUI. Ideally I would like: Be able create new GUI's and change existing ones quickly The resulting "thing" to be self contained Have the ability to include limited data where necessary ie. When showing a grid including the headers and perhaps a few rows of data for the grid. Allow clickable hotspots that either allow a new screen to be shown or perhaps an explanation hint. I have been using Visio 2003 for this kind of thing and then producing a PDF. However it has some disadvantages: Including data for grids is not possible You cannot include hotspots to allow changing of tabs within the workbook. eg Click on a button and it opens a different tab. If possible a free / open source application would be preferable but a low priced commercial application would also be good. All pointers and suggestions greatly appreciated.Rapid

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• How to add a another value to a key in python

  - by Nanowatt

  First I'm sorry this might be a dumb question but I'm trying to self learn python and I can't find the answer to my question. I want to make a phonebook and I need to add an email to an already existing name. That name has already a phone number attached. I have this first code: phonebook = {} phonebook ['ana'] = '12345' phonebook ['maria']= '23456' , '[email protected]' def add_contact(): name = raw_input ("Please enter a name:") number = raw_input ("Please enter a number:") phonebook[name] = number Then I wanted to add an email to the name "ana" for example: ana: 12345, [email protected]. I created this code but instead of addend a new value (the email), it just changes the old one, removing the number: def add_email(): name = raw_input("Please enter a name:") email = raw_input("Please enter an email:") phonebook[name] = email I tried .append() too but it didn't work. Can you help me? And I'm sorry if the code is bad, I'm just trying to learn and I'm a bit noob yet :)

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• Trying to Nullify Django model fields with method where model and fields are parameters

  - by Johnny4000

  I'm trying to write a method like the below where a list of fields (a subset of all the fields) is passed in as a parameter and has their column values set to null. I would be happy of I could get a method with just the fields as a parameter like below, but having the model as a parameter would be even better. from my_project.my_app.models import MyModel def nullify_columns (self, null_fields): field_names = MyModel._meta.get_all_field_names() for field in field_names: if field in null_fields: # The below line does not work because I'm not sure how to # dynamically assign the field name. MyModel.objects.all().update( (MyModel.get_field(field).column) = None) Right now I have something like if 'column1' in list_of_fields: MyModel.objects.all().update(column1 = None) if 'column2' in list_of_fields: MyModel.objects.all().update(column2 = None) etc. which is horrible, but works.

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• How to add a view on cell.contentview of uitableview iphone sdk

  - by neha

  Hi all, In my application I'm creating a .xib of a class and loading that .xib on cells of uitableview of another class. I want to add this .xib to cell.contentView and not cell. How shall I do that? - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString* cellIdentifier = @"testTableCell"; testTableCell * cell = (testTableCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier]; if (cell == nil) { [[NSBundle mainBundle] loadNibNamed:@"testTableCell" owner:self options:nil]; cell = tCell; } return cell; } testTableCell is my another class in which I have two labels and two buttons, of which I have created a .xib and loading it to tableview's cell as above. tCell is an object of class testTableCell. Thanks in advance.

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• stopping a cherrypy server over http

  - by d.c

  I have a cherrypy app that I'm controlling over http with a wxpython ui. I want to kill the server when the ui closes, but I don't know how to do that. Right now I'm just doing a sys.exit() on the window close event but thats resulting in Traceback (most recent call last): File "ui.py", line 67, in exitevent urllib.urlopen("http://"+server+"/?sigkill=1") File "c:\python26\lib\urllib.py", line 87, in urlopen return opener.open(url) File "c:\python26\lib\urllib.py", line 206, in open return getattr(self, name)(url) File "c:\python26\lib\urllib.py", line 354, in open_http 'got a bad status line', None) IOError: ('http protocol error', 0, 'got a bad status line', None) is that because I'm not stopping cherrypy properly?

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• Ruby - Subclassing array to make it randomize when flattened

  - by Markus O'Reilly

  I'm trying to subclass Array in ruby to make it randomize its elements when flatten! is called. Looking at the source code for Array#flatten (http://ruby-doc.org/core/classes/Array.src/M002218.html), it looks like it should recursively call flatten! on any array contained within an array. So, I tried doing something like this: class RandArray < Array def randomize! self.sort!{rand(3)-1} end def flatten! randomize! super end end However, when a normal array contains my RandArray and flatten is called on the normal array, flatten! is never called in my array. I figure ruby is just calling some other method to flatten the arrays recursively, but I can't figure out what that is. Any tips?

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• PyGTK: Doubleclick on CellRenderer

  - by rami

  Hello! In my PyGTK application I currently use 'editable' to make cells editable. But since my cell contents sometimes are really really large I want to ask the user for changes in a new window when he doubleclicks on a cell. But I could not find out how to hook on double-clicks on specific cellrenderers - I don't want to edit the whole row and I also don't want to set this callback for the whole row, only for columns where too long content can occur. How can I do this with CellRendererText() or something similar. My currently cell-generating code is: cols[i] = gtk.TreeViewColumn(coltitle) cells[i] = gtk.CellRendererText() cols[i].pack_start(cells[i]) cols[i].add_attribute(cells[i], 'text', i) cols[i].set_sizing(gtk.TREE_VIEW_COLUMN_FIXED) cols[i].set_fixed_width(100) cells[i].set_property('editable', True) cells[i].connect('edited', self.edited, (i, ls)) cols[i].set_resizable(True) mytreeview.append_column(cols[i]) Thanks!

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• setIncludesSubentities: in an NSFetchRequest is broken for entities across multiple persistent store

  - by SG

  Prior art which doesn't quite address this: http://stackoverflow.com/questions/1774359/core-data-migration-error-message-model-does-not-contain-configuration-xyz I have narrowed this down to a specific issue. It takes a minute to set up, though; please bear with me. The gist of the issue is that a persistentStoreCoordinator (apparently) cannot preserve the part of an object graph where a managedObject is marked as a subentity of another when they are stored in different files. Here goes... 1) I have 2 xcdatamodel files, each containing a single entity. In runtime, when the managed object model is constructed, I manually define one entity as subentity of another using setSubentities:. This is because defining subentities across multiple files in the editor is not supported yet. I then return the complete model with modelByMergingModels. //Works! [mainEntity setSubentities:canvasEntities]; NSLog(@"confirm %@ is super for %@", [[[canvasEntities lastObject] superentity] name], [[canvasEntities lastObject] name]); //Output: "confirm Note is super for Browser" 2) I have modified the persistentStoreCoordinator method so that it sets a different store for each entity. Technically, it uses configurations, and each entity has one and only one configuration defined. //Also works! for ( NSString *configName in [[HACanvasPluginManager shared].registeredCanvasTypes valueForKey:@"viewControllerClassName"] ) { storeUrl = [NSURL fileURLWithPath:[[self applicationDocumentsDirectory] stringByAppendingPathComponent:[configName stringByAppendingPathExtension:@"sqlite"]]]; //NSLog(@"entities for configuration '%@': %@", configName, [[[self managedObjectModel] entitiesForConfiguration:configName] valueForKey:@"name"]); //Output: "entities for configuration 'HATextCanvasController': (Note)" //Output: "entities for configuration 'HAWebCanvasController': (Browser)" if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:configName URL:storeUrl options:options error:&error]) //etc 3) I have a fetchRequest set for the parent entity, with setIncludesSubentities: and setAffectedStores: just to be sure we get both 1) and 2) covered. When inserting objects of either entity, they both are added to the context and they both are fetched by the fetchedResultsController and displayed in the tableView as expected. // Create the fetch request for the entity. NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; [fetchRequest setEntity:entity]; [fetchRequest setIncludesSubentities:YES]; //NECESSARY to fetch all canvas types [fetchRequest setSortDescriptors:sortDescriptors]; [fetchRequest setFetchBatchSize:20]; // Set the batch size to a suitable number. [fetchRequest setAffectedStores:[[managedObjectContext persistentStoreCoordinator] persistentStores]]; [fetchRequest setReturnsObjectsAsFaults:NO]; Here is where it starts misbehaving: after closing and relaunching the app, ONLY THE PARENT ENTITY is fetched. If I change the entity of the request using setEntity: to the entity for 'Note', all notes are fetched. If I change it to the entity for 'Browser', all the browsers are fetched. Let me reiterate that during the run in which an object is first inserted into the context, it will appear in the list. It is only after save and relaunch that a fetch request fails to traverse the hierarchy. Therefore, I can only conclude that it is the storage of the inheritance that is the problem. Let's recap why: - Both entities can be created, inserted into the context, and viewed, so the model is working - Both entities can be fetched with a single request, so the inheritance is working - I can confirm that the files are being stored separately and objects are going into their appropriate stores, so saving is working - Launching the app with either entity set for the request works, so retrieval from the store is working - This also means that traversing different stores with the request is working - By using a single store instead of multiple, the problem goes away completely, so creating, storing, fetching, viewing etc is working correctly. This leaves only one culprit (to my mind): the inheritance I'm setting with setSubentities: is effective only for objects creating during the session. Either objects/entities are being stored stripped of the inheritance info, or entity inheritance as defined programmatically only applies to new instances, or both. Either of these is unacceptable. Either it's a bug or I am way, way off course. I have been at this every which way for two days; any insight is greatly appreciated. The current workaround - just using a single store - works completely, except it won't be future-proof in the event that I remove one of the models from the app etc. It also boggles the mind because I can't see why you would have all this infrastructure for storing across multiple stores and for setting affected stores in fetch requests if it by core definition (of setSubentities:) doesn't work.

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• Upload file with POST method on Qt4

  - by mosg

  Hello! I'm looking for a basic code samples of how to upload files to server with HTTP POST method on Qt. My task: I have simple Qt program and I need to select any image file from the local host and upload it to the server. The selection part and GUI is simple and I have already done it, but with POST uploading I'm confused. In addition I have to say, that there is no authorization to upload file. If someone already looking this topic? PS: the reason why I'm asking and not coding my self is time, I need to get this method quick. Thank you, all success solutions from my side will be posted here for others.

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• Double pointer as Objective-C block parameter

  - by George WS

  Is it possible (and if so, safe) to create/use a block which takes a double pointer as an argument? For instance: - (void)methodWithBlock:(void (^)(NSError **error))block; Additional context, research, and questions: I'm using ARC. When I declare the method above and attempt to call it, XCode autocompletes my method invocation as follows: [self methodWithBlock:^(NSError *__autoreleasing *error) {}]; What does __autoreleasing mean here and why is it being added? I presume it has something to do with ARC. If this is possible and safe, can the pointer still be dereferenced in the block as it would be anywhere else? In general, what are the important differences between doing what I'm describing, and simply passing a double pointer as a method parameter (e.g. - (void)methodWithDoublePointer:(NSError **)error;)? What special considerations, if any, should be taken into account (again assuming this is possible at all)?

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• How to list directory hierarchy in PyGTK treeview widget?

  - by lyrae

  I am trying to generate a hierarchical directory listing in pyGTK. Currently, I have this following directory tree: /root folderA - subdirA - subA.py - a.py folderB - b.py I have written a function that -almost- seem to work: def go(root, piter = None): for filename in os.listdir(root): isdir = os.path.isdir(os.path.join(root, filename)) piter = self.treestore.append(piter, [filename]) if isdir == True: go(os.path.join(root, filename), piter) This is what i get when i run the app: I also think my function is inefficient and that i should be using os.walk(), since it already exists for such purpose. How can I, and what is the proper/most efficient way of generating a directory tree with pyGTK?

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• UICollectionViewController nested in a normal UIViewController

  - by patrickS

  I have added a UICollectionView into a normal ViewController (MainViewController), and than created a UICollectionViewController Subclass (CollectionViewController) in the ViewController and connected the UICollectionView outlet with the CollectionViewController object _collectionViewController = [[CollectionViewController alloc] initWithCollectionViewLayout:_collectionView.collectionViewLayout]; _collectionView.dataSource = _collectionViewController; _collectionView.delegate = _collectionViewController; In the CollectionViewController I have setup an simple NSArray object and I show this one. This works as expected. But If I try to access the collectionview from the CollectionViewController via self.collectionview I am not able to access this one. I dont know what I have to do, to also connect the collectionview. I have build a sample ios-app it is available at: https://github.com/patricks/uicollectionview-problem The method - (void)outputSelectedCell in the UICollectionViewController always shows, that there is nothing selected… I hope you understand the problem.

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• Why I add the CGPoint in the NSMultable Array?

  - by Tattat

  I want to store my CGPoint to the NSMultable Array, so , I have method like this: [self.points addObject:CGPointMake(x, y)]; But I got the error, it said that : Incompatible type for argument 1 of "addObject". So, I check out the API, (void)addObject:(id)anObject anObject The object to add to the end of the receiver's content. This value must not be nil. So, I think the "CGPointMake" can make a Object, but it can't be assigned. What happens?

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• Crashes when using AVAudioPlayer on iPhone

  - by mindthief

  Hi all, I am trying to use AVAudioPlayer to play some sounds in quick succession. When I invoke the sound-playing function less frequently so that the sounds play fully before the function is invoked again, the application runs fine. But if I invoke the function quickly in rapid succession (so that sounds are played while the previous sounds are still being played), the app eventually crashes after ~20 calls to the function, with the message "EXC_BAD_ACCESS". Here is code from the function: NSString *nsWavPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:wavFileName]; AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:nsWavPath] error:NULL]; theAudio.delegate = self; [theAudio play]; As mentioned in another thread, I implemented the following delegate function: - (void) audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag { if(!flag) NSLog(@"audio did NOT finish successfully\n"); [player release]; } But the app still crashes after around ~20 rapid calls to the function. Any idea what I'm doing wrong?

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• Create New Pseudo Variables in Squeak

  - by Artium

  Large part of squeak is implemented using squeak itself. I am curious to know if pseudo variables such as self or true are also implemented using squeak. If the answer is yes, where the implementation located? Specifically, assume that I want to add new subclass of "Boolean" called "Other" which will represent a third option: neither true nor false. I want that other, the only instance of Other to be similar to the true/false global singletons. Any ideas? Thank you.

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