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  • Collision Detection - Java - Rectangle

    - by Trizicus
    I would like to know if this is a good idea that conforms to best practices that does not lead to obscenely confusing code or major performance hit(s): Make my own Collision detection class that extends Rectangle class. Then when instantiating that object doing something such as Collision col = new Rectangle(); <- Should I do that or is that something that should be avoided? I am aware that I 'can' but should I? I want to extend Rectangle class because of the contains() and intersects() methods; should I be doing that or should I be doing something else for 2D collision detection in Java?

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  • Calculate directed broadcast address given IP address and subnet in PowerShell

    - by halr9000
    My goal is to calculate the directed broadcast address when given the IP and subnet mask of a host node. I know, sounds like homework. Once I reasoned through my task and boiled it down to this, I was amused with myself. Anyway, the solution will look something like the one in this question I suppose, but I'm not a math major and my C sucks. I could do with a PowerShell (preferred) or C# example to get me going. thanks!

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  • Running msiexec from a service (Local System account)

    - by Jarrod
    We are working on an update system for our software. The updater should in the background as a service, and when an update is available, downloads and installs it. We need the service to install the update since the msi requires elevation to run, but some of our clients will be restricted users. The MSI is a WIX MSI and does a Major Upgrade when run. The problem is, the update does not seem to work when ran from our service. I can see msiexec run, and it returns successfully, but seems to make no changes to the system. The same command, when run from my user account works as expected. Is there some caveat to running msiexec from a Local System service? We are simply doing: System.Diagnostics.Process.Start("msiexec.exe", arguments);

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  • "wait_fences: failed to receive reply: 10004003"?

    - by Michael
    I get this cryptic error the first time (and only the first time) my view is loaded due to the following line of code: - (void)viewWillAppear:(BOOL)animated { [textField becomeFirstResponder]; } There is a noticeable (~3 – 4 second, even on the simulator) delay due to this that makes my app feel unresponsive. Does anyone know how to fix this? I can't find any documentation on it on Apple's site, or any solutions here or on Google. Strangely, the opposite situation happens if I put the line in -viewDidAppear: instead of -viewWillAppear:; that is, instead of printing the error only the first time the keyboard is shown and never again, the error is not printed the first time but every time after. This is causing a major headache for me.

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  • Unexpected result in .NET 4 DirectoryInfo.EnumerateFiles(string)

    - by xkingpin
    It seems that the following code is not working as expected. I would assume that the following call to EnumarateFiles would only return files that match the filename pattern of c* ... however, filenames with H* are still getting returned. For example... the following file will get deleted in the following code (HNNN09060900932.xml). What's the issue? This is a major bug in my application. string searchPattern = "C*"; // get each file in this directory that is less than a given date var files = from file in SubDir.EnumerateFiles(searchPattern) where file.LastWriteTime < KeepDate select file; foreach (var file in files) { file.Delete(); }

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  • Webmail client that can open multiple email addresses at once like a desktop client

    - by Trent
    I've got 5 email domains with multiple email addresses on each domain. Traditional webmail clients only seem to allow you to browse a single account at a time (ie, you log into that account). With over 20 email addresses I need to monitor, this is obviously a major time sink. Is there a (preferably OSS, unix-based) webmail client that simulates a desktop email client, ie I log in once and can access all the email addresses from a central control panel? I've considered using a ticket system but that is overkill and not really used to my needs.

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  • RDLC - Adding a Data Source in VS2010

    - by Kezzer
    Greetings. I have an RDLC file and am wanting to add a data source to it, although without any luck so far. The data source is a custom class written by myself (just to add, we do this all the time). We recently converted over to the VS2010 RDLC format which caused some problems, but we've made some changes to our implementation that workaround the more major issues. So, back to the issue at hand, when I attempt to add my data source to the DummyDataSource list in the RDLC view in VS2010 it just does nothing, however it does add the data source to the list of data sources, but you can't select it from the drop-down list in the RDLC view which means I can't add the data source at all. Has anyone come across this problem? Is there anything I need to check? I've searched with fervour and had no luck.

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  • Why isn't Google Web Toolkit more popular?

    - by gerdemb
    I've recently become intrigued with Google Web Toolkit and have started playing with it on some personal projects. I've noticed though that it doesn't seem to be very popular. For example, two major freelancing job boards (www.elance.com and www.odesk.com) list no jobs for GWT and the list of projects using it on Google's official site is pretty slim http://code.google.com/webtoolkit/app_gallery.html (compare to Django projects for example http://www.djangosites.org/). This seems odd to me as GWT has been around since 2006 and is supported by the Google brand name. It also neatly solves the problem of creating cross-browser completely dynamic websites that I haven't seen possible with any other tool. So, why the lack of acceptance?

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  • What is better: CSS hacks or browser detection?

    - by Darryl Hein
    Commonly when I look around the Internet, I find that people are generally using CSS hacks to make their website look the same in all browsers. Personally, I have found this to be quite time consuming to find all of these hacks and test them; each change you make you have to test in 4+ browsers to make sure it didn't break anything else. About a year ago, I looked around the Internet for what other major sites are using (Yahoo, Google, BBC, etc) and found that most of them are doing some form of browser detection (JS, HTML if statements, server based). I have started doing this as well. On almost all of the sites I have worked on recently, I use jQuery, so I use the built in browser detection. Is there a reason you use or don't use either of these?

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  • Slow SQL Sync with Microsoft Sync Framework on Mobile Client

    - by Malkier
    Hello, we are developing an application which uses MS Sync Framework to sync data between Windows CE 6.0 with SQL CE 3.5 SP1 Clients and an SQL 2008 Database. Our major problem is a slow sync time up to 1 minute for 15 tables which are totally empty. Here's a break down of our components: Server: Sql Server 2008 15 tables with activated change tracking WCF Service with endpoint for the mobile sync (uses Sync Framework 2.0) Client (Mobile) Windows CE 6.0 NET Application using Sync Framework for Devices (CTP 1) which starts the sync As I mentioned above, the sync takes up to 1 minute without any changes and empty tables. The mobile device is in its dock. This is a deal breaker for a production environment. Does anybody have any experience in this field? Is there a way to improve things? Thanks for any responses.

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  • What are the differences between MSI and EXE installers, and which should I choose?

    - by Jared Harley
    I am working on an installer for a new version of my project (C#). Previously, I've used Inno Setup to create .exe files for installing my projects on other computers in the workplace. While reading through some tutorials, though, I came across Windows Installer XML, which uses XML files to build a .msi installer. My project will be available on a network share that all the employees have access to so they can install the software (I'm currently working on an update checker as well) What are the major differences between .exe and .msi installers? Why would I want to chose one over the other? Would either make more sense given my specific environment? I found some of the information at this question, but there was not a lot of information.

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  • WMIprvse process leaks memory on 2008 server R2

    - by Dani Fischer
    I have a Windows 2008 R2 server running on a VM machine. My .NET service is running on this server periodically querying WMI, for example: SELECT ProcessId FROM Win32_Service WHERE ... After a day or two WMIprvse takes up to 500M memory and WMI queries start getting out of memory exceptions. This article seems to be talking about this issue: "http://support.microsoft.com/kb/958124" I've seen other articles saying that Microsoft is aware of the problem and not going to issue a fix until the next major release. http://social.msdn.microsoft.com/Forums/en/netfxbcl/thread/256eb40c-d050-4278-a3d8-863e30db02a0 I'd appreciate any suggestions and insights on this.

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  • Convert Microsoft Visio Drawing (vsd) to PDF automatically

    - by nhinkle
    An open-source project I am working on uses Visio drawings for documentation, which are checked into source control. For those working on the project who don't own Visio, we have been converting the vsd files to PDFs so that they can still view them. It's not too difficult to save a copy as a PDF when making changes to the documentation, but we would like an automated way to do this conversion, so that we can set it up as a pre-checkin script in the SVN client. If anybody knows of a way to do this, either using something built-in to Visio, or with an outside script or command line tool, we would appreciate it. Edit: Thanks to the suggestion below, I have found the Visio Viewer 2010. This will be helpful for our contributors using Windows. We would still like to have the ability to create PDFs though, as there are readers available on every major operating system, and our contributors will not be using only Windows.

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  • Integrating Codeigniter and Objective C

    - by Mike
    I'm currently building a social networking site using the codeIgniter PHP framework. One of our major focuses of this site is to be able to upload images through the use of smartphones. We were focusing on building for the iPhone, but the iPhone doesn't let you upload files for some reason beyond me. I have been looking through solutions for days seeing if we could somehow integrate an iPhone app and have come up with nothing. The only thing I have found is using Cocoa Xcode in Objective C to somehow get around the fact. Now I don't know anything about objective C and I was wondering if I could somehow integrate a snippet of objective C into my PHP to allow users to upload photos off their iPhone and onto our site. Is this possible? If so how? If not, does anyone know another work around?

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  • F# currying efficiency?

    - by Eamon Nerbonne
    I have a function that looks as follows: let isInSet setElems normalize p = normalize p |> (Set.ofList setElems).Contains This function can be used to quickly check whether an element is semantically part of some set; for example, to check if a file path belongs to an html file: let getLowerExtension p = (Path.GetExtension p).ToLowerInvariant() let isHtmlPath = isInSet [".htm"; ".html"; ".xhtml"] getLowerExtension However, when I use a function such as the above, performance is poor since evaluation of the function body as written in "isInSet" seems to be delayed until all parameters are known - in particular, invariant bits such as (Set.ofList setElems).Contains are reevaluated each execution of isHtmlPath. How can best I maintain F#'s succint, readable nature while still getting the more efficient behavior in which the set construction is preevaluated. The above is just an example; I'm looking for a general pattern that avoids bogging me down in implementation details - where possible I'd like to avoid being distracted by details such as the implementation's execution order since that's usually not important to me and kind of undermines a major selling point of functional programming.

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  • Program Managers: Do you exist? How do I become you?

    - by sixtyfootersdude
    I am a Computer Science major who is interesting in exploring a career as a program manager. I knew since starting my degree that that was the role that was interested in but I just found out the actual job name recently. Q: Is this a common position? Do many companies have "program managers"? What should I do/read to improve my chances to become a project manager upon graduation? I have already completed three co-op terms at different companies none of which had this position.

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  • How to compile and build C# projects with Ant and Mono?

    - by Wing C. Chen
    I am currently working on a project with both java and C# codes within. Java takes the major role in this project. However, C# still takes a small part in it. I am using Ant to build the projects, and would very much like to use it to build C# too. I have learned that it's possible to build C# under Ant with the help of Mono. Can anybody provide any link of tutorial or guidance here? I was trying to google for it. But I haven't found any comprehensive data.

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  • ASP.NET MVC View Engine Comparison

    - by McKAMEY
    EDIT: added a community wiki to begin capturing people's experience with various View Engines. Please respectfully add any experiences you've had. I've been searching on SO & Google for a breakdown of the various View Engines available for ASP.NET MVC, but haven't found much more than simple high-level descriptions of what a view engine is. I'm not necessarily looking for "best" or "fastest" but rather some real world comparisons of advantages / disadvantages of the major players (e.g. the default WebFormViewEngine, MvcContrib View Engines, etc.) for various situations. I think this would be really helpful in determining if switching from the default engine would be advantageous for a given project or development group. Has anyone encountered such a comparison?

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  • Long-running transactions structured approach

    - by disown
    I'm looking for a structured approach to long-running (hours or more) transactions. As mentioned here, these type of interactions are usually handled by optimistic locking and manual merge strategies. It would be very handy to have some more structured approach to this type of problem using standard transactions. Various long-running interactions such as user registration, order confirmation etc. all have transaction-like semantics, and it is both error-prone and tedious to invent your own fragile manual roll-back and/or time-out/clean-up strategies. Taking a RDBMS as an example, I realize that it would be a major performance cost associated with keeping all the transactions open. As an alternative, I could imagine having a database supporting two isolation levels/strategies simultaneously, one for short-running and one for long-running conversations. Long-running conversations could then for instance have more strict limitations on data access to facilitate them taking more time (read-only semantics on some data, optimistic locking semantics etc). Are there any solutions which could do something similar?

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  • How is Entity Framework 4's POCO support compared to NHibernate?

    - by Kevin Pang
    Just wondering if anyone has had any experience using Entity Framework 4's POCO support and how it stands up compared to NHibernate. If they're the same, I'd be very interested in making Entity Framework 4 my ORM of choice if only because it would: Support both data first AND object first development Have a robust LINQ provider Be easier to pitch to clients (since it's developed by Microsoft) Come baked into the .NET framework rather than requiring 8 dlls to get up and running In other words, are there any major shortcomings to EF4? Does it support all of the basic functionality NHibernate supports (lazy-loading, eager-loading, 1st level caching, etc.) or is it still rough around the edges? Is the syntax for setting up the mappings as easy as NHibernate and/or Fluent NHibernate? Edit: Please don't bring up the vote of no confidence. That was ages ago and dealt with some serious shortcomings of EF1 that really don't seem to apply anymore to EF4.

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  • Microsoft Entrourage: rendering hyperlinks?

    - by rehanift
    When we send emails from my project, we send in both text/plain and text/html formats. All major clients (gmail, yahoo, hotmail, thunderbird, outlook) correctly display the simple HTML that we are using. However, Entourage renders all tags EXCEPT hyperlinks. What is confusing is that emails from other domains render hyperlinks correctly in Entourage. We have tried comparing the source / headers of our emails with others emails that seem to "work" and don't see any obvious differences. I googled around this issue and the only thing I could find what that Entourage doesn't allow users to insert hyperlinks when composing a message. Does anyone know what I might be doing wrong?

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  • inno setup - registry key vs. .ini files

    - by PPTim
    Hi, Dabbling with creating an installer with inno setup- but wondering: What are the pros and cons of using registry keys (windows program) vs. .ini files that sit within the program folder? If I store all my user settings in .ini files, the entire program can be removed by deleting the folder. With registry keys i'd have to create an uninstaller / remove the key manually. Why is it that most commercial applications use registry values? I know from brief use of Macs that most programs are drag and drop. Are one of the major reasons because of the lack of a registry key in mac OS?

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  • Opencart Installation and Display Errors

    - by jpoles1
    Hello, I need a bit of help installing a copy of Opencart onto my Godaddy hosting. I have had one major problem and that was, after during and after the install, none of the styles or images where appearing. I was able to completely fix the admin panel, but I am now running into problems with the frontend. I was able to fix the styles by editing a couple lines in the index.php file: define('HTTP_SERVER', 'http://' . $_SERVER['HTTP_HOST'] .'/opencart/'); define('HTTP_IMAGE', 'http://jpoles1.com/image/'); Now the problem is that unless you are on the base url http://jpoles1.com/opencart/, none of the database functionality works. For example the brands dropdown on the left will only be populated on the root page. Am I going about this problem the wrong way? What should I do to fix this problem? -- Thanks, Jordan

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  • Leaving out type="text/javascript" language="javascript"

    - by coffeeaddict
    Most of the script tags I create, I always include type="text/javascript" language="javascript" in the tag. My boss however does not. Sometimes he excludes both, sometimes just has language=javascript even without the quotes Now we have not had an issue in any of the major browsers with his tags. I'm talking about all versions of IE, FF, Safari, and Chrome. Personally I feel it's laziness and just totally improper and bad coding practice to leave stuff out like this even if it works without it. Anyone know if both should be included or just one or is it ok to leave both out in ASP.NET?

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  • In separate data access & business logic layer, can I use Entity framework classes in business layer

    - by Greg
    In separate data access & business logic layer, can I use Entity framework classes in business layer? EDIT: I don't think I will need to swap out the data access layer from my business logic in the future (i.e. will be SQL Server), however I will for the UI layer. Therefore the question is more meant to be are there any major issues with using EF classes for me in the business layer? Seems like there would be less plumbing code.

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