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  • Bare-metal virtualisation for the desktop

    - by Andrew Taylor
    Hi, Does anyone have any knowledge about bare-metal virtualisation products? I'm interested in building a new desktop machine for home, I've been looking at the Intel Quad Core processors and I'd like to put 8GB of RAM in there, but, it got me thinking about making the most out of the available resources. I thought if I could get a good 64bit machine, put some bare-metal virtualisation on, then have a primary system, I'd also be able to bring up some extra virtualised systems as and when I needed. I know most of the bare metal systems are designed for the server market, but, is there anything out there that works well for a desktop. What are the caveats? I presume I won't be able to make the most out of any video cards I could buy, what about just getting a decent screen resolution, will this be a problem? I run a single 24" screen. What about DVD/CD writing, is this possible? I'd like to re-rip my CD collection, I was hoping the quad 64Bit goodness would help me out with the encoding. I currently use a Mac and couldn't go back to windows so that leaves Linux, I was thinking a primary OS of ubuntu. Does this make a difference? Thanks Andrew

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  • Bundle a Python app as a single file to support add-ons or extensions?

    - by Brandon Craig Rhodes
    There are several utilities — all with different procedures, limitations, and target operating systems — for getting a Python package and all of its dependencies and turning them into a single binary program that is easy to ship to customers: http://wiki.python.org/moin/Freeze http://www.pyinstaller.org/ http://www.py2exe.org/ http://svn.pythonmac.org/py2app/py2app/trunk/doc/index.html My situation goes one step further: third-party developers will be wanting to write plug-ins, extensions, or add-ons for my application. It is, of course, a daunting question how users on platforms like Windows would most easily install plugins or addons in such a way that my app can easily discover that they have been installed. But beyond that basic question is another: how can a third-party developer bundle their extension with whatever libraries the extension itself needs (which might be binary modules, like lxml) in such a way that the plugin's dependencies become available for import at the same time that the plugin becomes available. How can this be approached? Will my application need its own plug-in area on disk and its own plug-in registry to make this tractable? Or are there general mechanisms, that I could avoid writing myself, that would allow an app that is distributed as a single executable to look around and find plugins that are also installed as single files?

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  • WPF Image change source when button is disabled

    - by Taylor
    Hi, I'm trying to show a different image when the button is disabled. Should be easy with triggers, right?! For some reason, I have not been able to get the images to switch. I've tried setting triggers on both the image and button. What is wrong with what I have below? How can I change the image source when the button is enabled/disabled? Thanks! <Button x:Name="rleft" Command="{Binding Path=Operation}" CommandParameter="{x:Static vm:Ops.OpA}"> <Button.Content> <StackPanel> <Image Width="24" Height="24" RenderOptions.BitmapScalingMode="NearestNeighbor" SnapsToDevicePixels="True" Source="/MyAssembly;component/images/enabled.png"> <Image.Style> <Style> <Style.Triggers> <DataTrigger Binding="{Binding ElementName=rleft, Path=Button.IsEnabled}" Value="False"> <Setter Property="Image.Source" Value="/MyAssembly;component/images/disabled.png" /> </DataTrigger> </Style.Triggers> </Style> </Image.Style> </Image> </StackPanel> </Button.Content> </Button>

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  • Can I have a shell alias evaluate a history substitution command?

    - by Brandon
    I'm trying to write an alias for cd !!:1, which takes the 2nd word of the previous command, and changes to the directory of that name. For instance, if I type rails new_project cd !!:1 the second line will cd into the "new_project" directory. Since !!:1 is awkward to type (even though it's short, it requires three SHIFTed keys, on opposite sides of of the keyboard, and then an unSHIFTed version of the key that was typed twice SHIFTed), I want to just type something like cd- but since the !!:1 is evaluated on the command line, I (OBVIOUSLY) can't just do alias cd-=!!:1 or I'd be saving an alias that contained "new_project" hard-coded into it. So I tried alias cd-='!!:1' The problem with this is that the !!:1 is NEVER evaluated, and I get a message that no directory named !!:1 exists. How can I make an alias where the history substitution is evaluated AT THE TIME I ISSUE THE ALIAS COMMAND, not when I define the alias, and not never? (I've tried this in both bash and zsh, and get the same results in both.)

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  • x86_64 Assembly Command Line Arguments

    - by Brandon oubiub
    I'm new to assembly, and I just got familiar with the call stack, so bare with me. To get the command line arguments in x86_64 on Mac OS X, I can do the following: _main: sub rsp, 8 ; 16 bit stack alignment mov rax, 0 mov rdi, format mov rsi, [rsp + 32] call _printf Where format is "%s". rsi gets set to argv[0]. So, from this, I drew out what (I think) the stack looks like initially: top of stack <- rsp after alignment return address <- rsp at beginning (aligned rsp + 8) [something] <- rsp + 16 argc <- rsp + 24 argv[0] <- rsp + 32 argv[1] <- rsp + 40 ... ... bottom of stack And so on. Sorry if that's hard to read. I'm wondering what [something] is. After a few tests, I find that it is usually just 0. However, occasionally, it is some (seemingly) random number. EDIT: Also, could you tell me if the rest of my stack drawing is correct?

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  • Using PHP, how to parse the title and meta tags from a HTML page?

    - by Dylan Taylor
    Hey guys, I need to be able to get the TITLE and DESCIPTION metadata out of a page. I've been trying to do this but I've been getting more errors than actual results. (I have an array of about 10 URLS, usually only about 2 of them give me the descrption. I have yet to get the title). So how do I, in PHP, get the Desc and Title from a remote page, and if there is none or if there's an error, ignore it? -Dylan

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  • How to apply styles to all windows in WPF app?

    - by Brandon
    I have the following App.xaml file: <Application x:Class="MiniDeviceConfig.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" StartupUri="MiniDeviceConfig.xaml"> <Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Button.xaml"/> <ResourceDictionary Source="CheckBox.xaml"/> <ResourceDictionary Source="ComboBox.xaml"/> <ResourceDictionary Source="Common.xaml"/> <ResourceDictionary Source="GroupBox.xaml"/> <ResourceDictionary Source="Label.xaml"/> <ResourceDictionary Source="LinkButton.xaml"/> <ResourceDictionary Source="ListBox.xaml"/> <ResourceDictionary Source="ListView.xaml"/> <ResourceDictionary Source="RadioButton.xaml"/> <ResourceDictionary Source="Tooltip.xaml"/> <ResourceDictionary Source="Window.xaml"/> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources> In my application, my main window is MiniDeviceConfig.xaml (as seen above). In my Button.xaml file, I clearly set the button height to some obscene number. And, this size is reflected in my main window's buttons. However, some action on the main window triggers a modal window that has more buttons on it. I was expecting the same tall buttons but no such luck. How do I get the style to propagate into all windows in the application?

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  • Finding the stored procedure that a Crystal Report is using

    - by Brandon
    I need to retrieve the name of the stored procedure that a crystal report is running. Is there any way to do this in C# using the CrystalDecisions.CrystalReports.Engine.ReportDocument object? I can't seem to find a property that will give me the stored procedure name. Is this even possible? I've been through almost all the properties I can think of. The DataDefinition object has collections for the Formula, Parameter, Group Name, and Running Total Fields, but not one for the Database Fields.

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  • How to implement or emulate an "abstract" OCUnit test class?

    - by Quinn Taylor
    I have a number of Objective-C classes organized in an inheritance hierarchy. They all share a common parent which implements all the behaviors shared among the children. Each child class defines a few methods that make it work, and the parent class raises an exception for the methods designed to be implemented/overridden by its children. This effectively makes the parent a pseudo-abstract class (since it's useless on its own) even though Objective-C doesn't explicitly support abstract classes. The crux of this problem is that I'm unit testing this class hierarchy using OCUnit, and the tests are structured similarly: one test class that exercises the common behavior, with a subclass corresponding to each of the child classes under test. However, running the test cases on the (effectively abstract) parent class is problematic, since the unit tests will fail in spectacular fashion without the key methods. (The alternative of repeating the common tests across 5 test classes is not really an acceptable option.) The non-ideal solution I've been using is to check (in each test method) whether the instance is the parent test class, and bail out if it is. This leads to repeated code in every test method, a problem that becomes increasingly annoying if one's unit tests are highly granular. In addition, all such tests are still executed and reported as successes, skewing the number of meaningful tests that were actually run. What I'd prefer is a way to signal to OCUnit "Don't run any tests in this class, only run them in its child classes." To my knowledge, there isn't (yet) a way to do that, something similar to a +(BOOL)isAbstractTest method I can implement/override. Any ideas on a better way to solve this problem with minimal repetition? Does OCUnit have any ability to flag a test class in this way, or is it time to file a Radar? Edit: Here's a link to the test code in question. Notice the frequent repetition of if (...) return; to start a method, including use of the NonConcreteClass() macro for brevity.

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  • How to use ternary operator instead of if-else in PHP

    - by Mac Taylor
    hey guys i need to shorten or better to say ., harden my codes this is my original code : if ($type = "recent") { $OrderType = "sid DESC"; }elseif ($type = "pop"){ $OrderType = "counter DESC"; }else { $OrderType = "RAND()"; } now how can i use markers like this : $OrderType = ($type = "recent") ? "sid DESC" : "counter DESC" ; i tried but i didnt know how to write elseif in operators

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  • Problems setting up an ASP.NET MVC site on IIS7 w/ Nhibernate

    - by Brandon
    When deploying my published website to the host (Its a shared hosting plan) I get this error: [NullReferenceException: Object reference not set to an instance of an object.] System.Web.PipelineStepManager.ResumeSteps(Exception error) +929 System.Web.HttpApplication.BeginProcessRequestNotification(HttpContext context, AsyncCallback cb) +91 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +508 I found this question which describes my problem, but I'm not initializing NHibernate in Application_Start, it is already being done in Init. The only other cause of this error I can find is that the Global.asax file is inheriting from a class other than HttpApplication, but I'm not doing that either. This is pretty much the Global.asax file protected void Application_Start() { AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); } public override void Init() { base.Init(); if (_wasNHibernateInitialized) return; // Initialize NHibernate // Other setup like the StructureMap initialization } Is there any other reason why an ASP.NET MVC application would give this error when being deployed to IIS7?

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  • Java File IO Compendium

    - by Warren Taylor
    I've worked in and around Java for nigh on a decade, but have managed to ever avoid doing serious work with files. Mostly I've written database driven applications, but occasionally, even those require some file io. Since I do it so rarely, I end up googling around for quite some time to figure out the exact incantation that Java requires to read a file into a byte[], char[], String or whatever I need at the time. For a 'once and for all' list, I'd like to see all of the usual ways to get data from a file into Java, or vice versa. There will be a fair bit of overlap, but the point is to define all of the subtle different variants that are out there. For example: Read/Write a text file from/to a single String. Read a text file line by line. Read/Write a binary file from/to a single byte[]. Read a binary file into a byte[] of size x, one chunk at a time. The goal is to show concise ways to do each of these. Samples do not need to handle missing files or other errors, as that is generally domain specific. Feel free to suggest more IO tasks that are somewhat common and I have neglected to mention.

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  • best way to escape and create a slug

    - by Mac Taylor
    hey guys im somehow confused in using proper functions to escape and create a slug i used this : $slug_title = mysql_real_escape_string()($mtitle); but someone told me not to use it and use urlencode() which one is better for slugs and security as i can see in SO , it inserts - between words : http://stackoverflow.com/questions/941270/validating-a-slug-in-django thanx in advanced

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  • Problems with VBScript - RegRead when running as a service

    - by Brandon
    I am working on a script that runs under a custom installation utility, which is running as a service. To get the current user name the script executes this command: str_Acct_Name_Val = "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Logon User Name" str_Acct_Name = RegRead(str_Acct_Name_Val) When I run the script from the command prompt, it can read that value just fine (under an administrator account). When the value is attempted to be read with service/local system privileges, the read fails. What is the problem here? EDIT: Some additional information. When running as a service calling the current user name returns "SYSTEM" and my guess is that HKCU doesn't "exist" under the view of the SYSTEM, since there is technically no current user. There is a user logged in at the time, but not in the scope of the running script. Maybe there is somewhere in HKLM I could find the currently logged on user?

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  • Subversion svn:externals - What's wrong here?

    - by Brandon Montgomery
    I first want to say I've read the Subversion manual. I've read this question. I've also read this question. Here's my dilemma. Let's say I have 3 repositories laid out like this: DataAccessObject/ branches/ tags/ trunk/ DataAccessObject/ DataAccessObjectTests/ PlanObject/ branches/ tags/ trunk/ PlanObject/ PlanObjectTests/ WinFormsPlanViewer/ branches/ tags/ trunk/ WinFormsPlanViewer/ The PlanObject and DataAccessObject repositories contain shared projects. They are used by the WinFormsPlanViewer, but also by several other projects in several other repositories. Bear with me here. I put an svn:externals definition on the WinFormsPlanViewer/trunk folder like this: https://server/svn/PlanObject/trunk Objects https://server/svn/DataAccessObject/trunk Objects And here's what I see after I do an svn update. WinFormsPlanViewer/ branches/ tags/ trunk/ WinFormsPlanViewer/ Objects/ DataAccessObject/ DataAccessObjectTests/ The PlanObject stuff doesn't even come down in the update! I don't know if this has anything to do with it, but there's an externals definition on the PlanObject/trunk folder also: https://server/svn/DataAccessObject/trunk Objects What's going on here? What am I doing wrong? Are there bad consequences of referencing the PlanObject and the DataAccessObject from the WinFormsPlanViewer using svn:externals when the PlanObject references the DataAccessObject using svn:externals also?

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  • PHP array taking up too much memory

    - by Dylan Taylor
    I have a multidimensional array. The array itself is fine. My problem is that the script takes up monster amounts of memory, and since I'm running this on my MAMP install on my iBook G4, my computer freezes up. Below is the full script. $query = "SELECT * FROM posts ORDER BY id DESC LIMIT 10"; $result = mysql_query($query); $posts = array(); while($row = mysql_fetch_array($result)){ $posts[$row["id"]]['post_id'] = $row["id"]; $posts[$row["id"]]['post_title'] = $row["title"]; $posts[$row["id"]]['post_text'] = $row["text"]; $posts[$row["id"]]['post_tags'] = $row["tags"]; $posts[$row["id"]]['post_category'] = $row["category"]; foreach ($posts as $post) { echo $post["post_id"]; } Is there a workaround that still achieves my goal (to export the MySQL query rows to an array)? -Dylan

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  • PHP array taking up to much memory

    - by Dylan Taylor
    I have a multidimensional array. The array itself is fine. My problem is that the script takes up monster amounts of memory, and since I'm running this on my MAMP install on my iBook G4, my computer freezes up. Below is the full script. $query = "SELECT * FROM posts ORDER BY id DESC LIMIT 10"; $result = mysql_query($query); $posts = array(); while($row = mysql_fetch_array($result)){ $posts[$row["id"]]['post_id'] = $row["id"]; $posts[$row["id"]]['post_title'] = $row["title"]; $posts[$row["id"]]['post_text'] = $row["text"]; $posts[$row["id"]]['post_tags'] = $row["tags"]; $posts[$row["id"]]['post_category'] = $row["category"]; foreach ($posts as $post) { echo $post["post_id"]; } Is there a workaround that still achieves my goal (to export the MySQL query rows to an array)? -Dylan

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  • Problem with JMX query of Coherence node MBeans visible in JConsole

    - by Quinn Taylor
    I'm using JMX to build a custom tool for monitoring remote Coherence clusters at work. I'm able to connect just fine and query MBeans directly, and I've acquired nearly all the information I need. However, I've run into a snag when trying to query MBeans for specific caches within a cluster, which is where I can find stats about total number of gets/puts, average time for each, etc. The MBeans I'm trying to access programatically are visible when I connect to the remote process using JConsole, and have names like this: Coherence:type=Cache,service=SequenceQueue,name=SEQ%GENERATOR,nodeId=1,tier=back It would make it more flexible if I can dynamically grab all type=Cache MBeans for a particular node ID without specifying all the caches. I'm trying to query them like this: QueryExp specifiedNodeId = Query.eq(Query.attr("nodeId"), Query.value(nodeId)); QueryExp typeIsCache = Query.eq(Query.attr("type"), Query.value("Cache")); QueryExp cacheNodes = Query.and(specifiedNodeId, typeIsCache); ObjectName coherence = new ObjectName("Coherence:*"); Set<ObjectName> cacheMBeans = mBeanServer.queryMBeans(coherence, cacheNodes); However, regardless of whether I use queryMBeans() or queryNames(), the query returns a Set containing... ...0 objects if I pass the arguments shown above ...0 objects if I pass null for the first argument ...all MBeans in the Coherence:* domain (112) if I pass null for the second argument ...every single MBean (128) if I pass null for both arguments The first two results are the unexpected ones, and suggest a problem in the QueryExp I'm passing, but I can't figure out what the problem is. I even tried just passing typeIsCache or specifiedNodeId for the second parameter (with either coherence or null as the first parameter) and I always get 0 results. I'm pretty green with JMX — any insight on what the problem is? (FYI, the monitoring tool will be run on Java 5, so things like JMX 2.0 won't help me at this point.)

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  • code to play sound programmatically using a button on the iphone

    - by Brandon
    I am trying to figure out how to hook up a button to play a sound programmatically without using IB. I have the code to play the sound, but have no way of hooking the button up to play the sound? any help? here is my code that I'm using: - (void)playSound { NSString *path = [[NSBundle mainBundle] pathForResource:@"boing_1" ofType:@"wav"]; AVAudioPlayer* myAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path error:NULL]]; myAudio.delegate = self; myAudio.volume = 2.0; myAudio.numberOfLoops = 1; [myAudio play]; }

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