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  • Game Boy Generates Music In An Unexpected Way [Video]

    - by Jason Fitzpatrick
    When we saw a link about a Game Boy generated melody we assumed it was a chip-tune track generated by the Game Boy’s sound processor. We were pleasantly surprised to see the Game Boy itself was the instrument. [via Geeks Are Sexy] Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header? The How-To Geek Guide to Getting Started with TrueCrypt

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  • What does 'd' do in oh-my-zsh?

    - by ovatsug25
    I just downloaded oh-my-zsh and found out that 'd' has been taken over by some command I do not know. Does anybody know what the output from this is? 0 ~/Desktop/Dropbox/project_Sites/rails_app/app/views/static_pages 1 ~/Desktop/Dropbox/project_Sites/rails_app/app/views 2 ~/Desktop/Dropbox/project_Sites/rails_app 3 ~/Desktop/Dropbox/project_Sites 4 ~/Desktop/Dropbox 5 ~ 6 ~/.oh-my-zsh 7 ~/.oh-my-zsh/plugins 8 ~/.oh-my-zsh/plugins/rails 9 ~/.oh-my-zsh/lib

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  • Git autocomplete stopped working in Oh My ZSH

    - by Eric
    Help! My git autocomplete stopped working in Oh My ZSH. It was working, but now it is now. I'm not sure what changed, so I'm hoping someone can help me track down the problem. I've tried uninstalling and reinstalling but no luck, Which plugins would you like to load? (plugins can be found in ~/.oh-my-zsh/plugins/*) # Custom plugins may be added to ~/.oh-my-zsh/custom/plugins/ # Example format: plugins=(rails git textmate ruby lighthouse) plugins=(git)

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  • Reconciling the Boy Scout Rule and Opportunistic Refactoring with code reviews

    - by t0x1n
    I am a great believer in the Boy Scout Rule: Always check a module in cleaner than when you checked it out." No matter who the original author was, what if we always made some effort, no matter how small, to improve the module. What would be the result? I think if we all followed that simple rule, we'd see the end of the relentless deterioration of our software systems. Instead, our systems would gradually get better and better as they evolved. We'd also see teams caring for the system as a whole, rather than just individuals caring for their own small little part. I am also a great believer in the related idea of Opportunistic Refactoring: Although there are places for some scheduled refactoring efforts, I prefer to encourage refactoring as an opportunistic activity, done whenever and wherever code needs to cleaned up - by whoever. What this means is that at any time someone sees some code that isn't as clear as it should be, they should take the opportunity to fix it right there and then - or at least within a few minutes Particularly note the following excerpt from the refactoring article: I'm wary of any development practices that cause friction for opportunistic refactoring ... My sense is that most teams don't do enough refactoring, so it's important to pay attention to anything that is discouraging people from doing it. To help flush this out be aware of any time you feel discouraged from doing a small refactoring, one that you're sure will only take a minute or two. Any such barrier is a smell that should prompt a conversation. So make a note of the discouragement and bring it up with the team. At the very least it should be discussed during your next retrospective. Where I work, there is one development practice that causes heavy friction - Code Review (CR). Whenever I change anything that's not in the scope of my "assignment" I'm being rebuked by my reviewers that I'm making the change harder to review. This is especially true when refactoring is involved, since it makes "line by line" diff comparison difficult. This approach is the standard here, which means opportunistic refactoring is seldom done, and only "planned" refactoring (which is usually too little, too late) takes place, if at all. I claim that the benefits are worth it, and that 3 reviewers will work a little harder (to actually understand the code before and after, rather than look at the narrow scope of which lines changed - the review itself would be better due to that alone) so that the next 100 developers reading and maintaining the code will benefit. When I present this argument my reviewers, they say they have no problem with my refactoring, as long as it's not in the same CR. However I claim this is a myth: (1) Most of the times you only realize what and how you want to refactor when you're in the midst of your assignment. As Martin Fowler puts it: As you add the functionality, you realize that some code you're adding contains some duplication with some existing code, so you need to refactor the existing code to clean things up... You may get something working, but realize that it would be better if the interaction with existing classes was changed. Take that opportunity to do that before you consider yourself done. (2) Nobody is going to look favorably at you releasing "refactoring" CRs you were not supposed to do. A CR has a certain overhead and your manager doesn't want you to "waste your time" on refactoring. When it's bundled with the change you're supposed to do, this issue is minimized. The issue is exacerbated by Resharper, as each new file I add to the change (and I can't know in advance exactly which files would end up changed) is usually littered with errors and suggestions - most of which are spot on and totally deserve fixing. The end result is that I see horrible code, and I just leave it there. Ironically, I feel that fixing such code not only will not improve my standings, but actually lower them and paint me as the "unfocused" guy who wastes time fixing things nobody cares about instead of doing his job. I feel bad about it because I truly despise bad code and can't stand watching it, let alone call it from my methods! Any thoughts on how I can remedy this situation ?

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  • little oh notation as the limit of n goes to infinity

    - by Tony
    Hi all, I'm just trying to understand how in little o notation this is true: f(n)/g(n) as n goes to infinity = infinity? Can someone explain that to me? I do get the idea that f(n) = o(g(n)) means that f(n) grows no faster then cg(n) for all constants c 0. I just don't get the bit in bold above.

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  • Big Oh notation does not mention constant value

    - by user883561
    I am a programmer and have just started reading Algorithms. I am not completely convinced with the notations namely Bog Oh, Big Omega and Big Theta. The reason is by definition of Big Oh, it states that there should be a function g(x) such that it is always greater than or equal to f(x). Or f(x) <= c.n for all values of n n0. My doubt is the why dont we mention the constant value in the definition? For example. lets say a function 6n+4, we denote it as O(n). but its not true that the definition holds good for all constant value. this holds good only when c = 10 and n = 1. For lesser values of c than 6, the value of n0 increases. So why we do not mention the constant value as a part of the definition.

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  • GPS feature big on mobile phones, oh yeah, they can make voice calls and text too

    - by hinkmond
    Here's a Web article stating the oh-so-obvious: One of the most useful things a cell phone can do is give you GPS location. See: Cell Phones Give Location Here's a quote: Now, majority of GPS receivers are built into mobile phones, with varying degrees of coverage and user accessibility. Commercial navigation software is available for most 21st century smartphones as well as some Java-enabled phones that allows them to use an internal or external GPS receiver. Wow. That's really big news. (face palm) Next thing we know, the Web site at stating-the-obvious.com, is going to tell us that the Internets will bring us news, sports, and entertainment right to our fingertips. Hinkmond

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  • Oh Unity Launcher scrambled with color dots after log on or restart

    - by Cominatyalive
    The left hand side Unity launch bar is color scrambled after reboot, or log on. When touching it with the mouse arrow, it comes back to normal. I installed gnome shell color before this started happening. I will uninstall gnome shell color & see if this problem goes away. Any one ever see this happen. I run a Nvidia 550ti ge-force graphic card. I have the latest 295.33 driver from Nvidia installed and it does show activated in my restricted driver window. Oh yeah, before you inform me, I can tell you that yes, I do see the instructions to report bugs to the correct source. But I really don't know if this is a bug or not. Could be something else.

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  • Ten - oh, wait, eleven - Eleven things you should know about the ASP.NET Fall 2012 Update

    - by Jon Galloway
    Today, just a little over two months after the big ASP.NET 4.5 / ASP.NET MVC 4 / ASP.NET Web API / Visual Studio 2012 / Web Matrix 2 release, the first preview of the ASP.NET Fall 2012 Update is out. Here's what you need to know: There are no new framework bits in this release - there's no change or update to ASP.NET Core, ASP.NET MVC or Web Forms features. This means that you can start using it without any updates to your server, upgrade concerns, etc. This update is really an update to the project templates and Visual Studio tooling, conceptually similar to the ASP.NET MVC 3 Tools Update. It's a relatively lightweight install. It's a 41MB download. I've installed it many times and usually takes 5-7 minutes; it's never required a reboot. It adds some new project templates to ASP.NET MVC: Facebook Application and Single Page Application templates. It adds a lot of cool enhancements to ASP.NET Web API. It adds some tooling that makes it easy to take advantage of features like SignalR, Friendly URLs, and Windows Azure Authentication. Most of the new features are installed via NuGet packages. Since ASP.NET is open source, nightly NuGet packages are available, and the roadmap is published, most of this has really been publicly available for a while. The official name of this drop is the ASP.NET Fall 2012 Update BUILD Prerelease. Please do not attempt to say that ten times fast. While the EULA doesn't prohibit it, it WILL legally change your first name to Scott. As with all new releases, you can find out everything you need to know about the Fall Update at http://asp.net/vnext (especially the release notes!) I'm going to be showing all of this off, assisted by special guest code monkey Scott Hanselman, this Friday at BUILD: Bleeding edge ASP.NET: See what is next for MVC, Web API, SignalR and more… (and I've heard it will be livestreamed). Let's look at some of those things in more detail. No new bits ASP.NET 4.5, MVC 4 and Web API have a lot of great core features. I see the goal of this update release as making it easier to put those features to use to solve some useful scenarios by taking advantage of NuGet packages and template code. If you create a new ASP.NET MVC application using one of the new templates, you'll see that it's using the ASP.NET MVC 4 RTM NuGet package (4.0.20710.0): This means you can install and use the Fall Update without any impact on your existing projects and no worries about upgrading or compatibility. New Facebook Application Template ASP.NET MVC 4 (and ASP.NET 4.5 Web Forms) included the ability to authenticate your users via OAuth and OpenID, so you could let users log in to your site using a Facebook account. One of the new changes in the Fall Update is a new template that makes it really easy to create full Facebook applications. You could create Facebook application in ASP.NET already, you'd just need to go through a few steps: Search around to find a good Facebook NuGet package, like the Facebook C# SDK (written by my friend Nathan Totten and some other Facebook SDK brainiacs). Read the Facebook developer documentation to figure out how to authenticate and integrate with them. Write some code, debug it and repeat until you got something working. Get started with the application you'd originally wanted to write. What this template does for you: eliminate steps 1-3. Erik Porter, Nathan and some other experts built out the Facebook Application template so it automatically pulls in and configures the Facebook NuGet package and makes it really easy to take advantage of it in an ASP.NET MVC application. One great example is the the way you access a Facebook user's information. Take a look at the following code in a File / New / MVC / Facebook Application site. First, the Home Controller Index action: [FacebookAuthorize(Permissions = "email")] public ActionResult Index(MyAppUser user, FacebookObjectList<MyAppUserFriend> userFriends) { ViewBag.Message = "Modify this template to jump-start your Facebook application using ASP.NET MVC."; ViewBag.User = user; ViewBag.Friends = userFriends.Take(5); return View(); } First, notice that there's a FacebookAuthorize attribute which requires the user is authenticated via Facebook and requires permissions to access their e-mail address. It binds to two things: a custom MyAppUser object and a list of friends. Let's look at the MyAppUser code: using Microsoft.AspNet.Mvc.Facebook.Attributes; using Microsoft.AspNet.Mvc.Facebook.Models; // Add any fields you want to be saved for each user and specify the field name in the JSON coming back from Facebook // https://developers.facebook.com/docs/reference/api/user/ namespace MvcApplication3.Models { public class MyAppUser : FacebookUser { public string Name { get; set; } [FacebookField(FieldName = "picture", JsonField = "picture.data.url")] public string PictureUrl { get; set; } public string Email { get; set; } } } You can add in other custom fields if you want, but you can also just bind to a FacebookUser and it will automatically pull in the available fields. You can even just bind directly to a FacebookUser and check for what's available in debug mode, which makes it really easy to explore. For more information and some walkthroughs on creating Facebook applications, see: Deploying your first Facebook App on Azure using ASP.NET MVC Facebook Template (Yao Huang Lin) Facebook Application Template Tutorial (Erik Porter) Single Page Application template Early releases of ASP.NET MVC 4 included a Single Page Application template, but it was removed for the official release. There was a lot of interest in it, but it was kind of complex, as it handled features for things like data management. The new Single Page Application template that ships with the Fall Update is more lightweight. It uses Knockout.js on the client and ASP.NET Web API on the server, and it includes a sample application that shows how they all work together. I think the real benefit of this application is that it shows a good pattern for using ASP.NET Web API and Knockout.js. For instance, it's easy to end up with a mess of JavaScript when you're building out a client-side application. This template uses three separate JavaScript files (delivered via a Bundle, of course): todoList.js - this is where the main client-side logic lives todoList.dataAccess.js - this defines how the client-side application interacts with the back-end services todoList.bindings.js - this is where you set up events and overrides for the Knockout bindings - for instance, hooking up jQuery validation and defining some client-side events This is a fun one to play with, because you can just create a new Single Page Application and hit F5. Quick, easy install (with one gotcha) One of the cool engineering changes for this release is a big update to the installer to make it more lightweight and efficient. I've been running nightly builds of this for a few weeks to prep for my BUILD demos, and the install has been really quick and easy to use. The install takes about 5 minutes, has never required a reboot for me, and the uninstall is just as simple. There's one gotcha, though. In this preview release, you may hit an issue that will require you to uninstall and re-install the NuGet VSIX package. The problem comes up when you create a new MVC application and see this dialog: The solution, as explained in the release notes, is to uninstall and re-install the NuGet VSIX package: Start Visual Studio 2012 as an Administrator Go to Tools->Extensions and Updates and uninstall NuGet. Close Visual Studio Navigate to the ASP.NET Fall 2012 Update installation folder: For Visual Studio 2012: Program Files\Microsoft ASP.NET\ASP.NET Web Stack\Visual Studio 2012 For Visual Studio 2012 Express for Web: Program Files\Microsoft ASP.NET\ASP.NET Web Stack\Visual Studio Express 2012 for Web Double click on the NuGet.Tools.vsix to reinstall NuGet This took me under a minute to do, and I was up and running. ASP.NET Web API Update Extravaganza! Uh, the Web API team is out of hand. They added a ton of new stuff: OData support, Tracing, and API Help Page generation. OData support Some people like OData. Some people start twitching when you mention it. If you're in the first group, this is for you. You can add a [Queryable] attribute to an API that returns an IQueryable<Whatever> and you get OData query support from your clients. Then, without any extra changes to your client or server code, your clients can send filters like this: /Suppliers?$filter=Name eq ‘Microsoft’ For more information about OData support in ASP.NET Web API, see Alex James' mega-post about it: OData support in ASP.NET Web API ASP.NET Web API Tracing Tracing makes it really easy to leverage the .NET Tracing system from within your ASP.NET Web API's. If you look at the \App_Start\WebApiConfig.cs file in new ASP.NET Web API project, you'll see a call to TraceConfig.Register(config). That calls into some code in the new \App_Start\TraceConfig.cs file: public static void Register(HttpConfiguration configuration) { if (configuration == null) { throw new ArgumentNullException("configuration"); } SystemDiagnosticsTraceWriter traceWriter = new SystemDiagnosticsTraceWriter() { MinimumLevel = TraceLevel.Info, IsVerbose = false }; configuration.Services.Replace(typeof(ITraceWriter), traceWriter); } As you can see, this is using the standard trace system, so you can extend it to any other trace listeners you'd like. To see how it works with the built in diagnostics trace writer, just run the application call some API's, and look at the Visual Studio Output window: iisexpress.exe Information: 0 : Request, Method=GET, Url=http://localhost:11147/api/Values, Message='http://localhost:11147/api/Values' iisexpress.exe Information: 0 : Message='Values', Operation=DefaultHttpControllerSelector.SelectController iisexpress.exe Information: 0 : Message='WebAPI.Controllers.ValuesController', Operation=DefaultHttpControllerActivator.Create iisexpress.exe Information: 0 : Message='WebAPI.Controllers.ValuesController', Operation=HttpControllerDescriptor.CreateController iisexpress.exe Information: 0 : Message='Selected action 'Get()'', Operation=ApiControllerActionSelector.SelectAction iisexpress.exe Information: 0 : Operation=HttpActionBinding.ExecuteBindingAsync iisexpress.exe Information: 0 : Operation=QueryableAttribute.ActionExecuting iisexpress.exe Information: 0 : Message='Action returned 'System.String[]'', Operation=ReflectedHttpActionDescriptor.ExecuteAsync iisexpress.exe Information: 0 : Message='Will use same 'JsonMediaTypeFormatter' formatter', Operation=JsonMediaTypeFormatter.GetPerRequestFormatterInstance iisexpress.exe Information: 0 : Message='Selected formatter='JsonMediaTypeFormatter', content-type='application/json; charset=utf-8'', Operation=DefaultContentNegotiator.Negotiate iisexpress.exe Information: 0 : Operation=ApiControllerActionInvoker.InvokeActionAsync, Status=200 (OK) iisexpress.exe Information: 0 : Operation=QueryableAttribute.ActionExecuted, Status=200 (OK) iisexpress.exe Information: 0 : Operation=ValuesController.ExecuteAsync, Status=200 (OK) iisexpress.exe Information: 0 : Response, Status=200 (OK), Method=GET, Url=http://localhost:11147/api/Values, Message='Content-type='application/json; charset=utf-8', content-length=unknown' iisexpress.exe Information: 0 : Operation=JsonMediaTypeFormatter.WriteToStreamAsync iisexpress.exe Information: 0 : Operation=ValuesController.Dispose API Help Page When you create a new ASP.NET Web API project, you'll see an API link in the header: Clicking the API link shows generated help documentation for your ASP.NET Web API controllers: And clicking on any of those APIs shows specific information: What's great is that this information is dynamically generated, so if you add your own new APIs it will automatically show useful and up to date help. This system is also completely extensible, so you can generate documentation in other formats or customize the HTML help as much as you'd like. The Help generation code is all included in an ASP.NET MVC Area: SignalR SignalR is a really slick open source project that was started by some ASP.NET team members in their spare time to add real-time communications capabilities to ASP.NET - and .NET applications in general. It allows you to handle long running communications channels between your server and multiple connected clients using the best communications channel they can both support - websockets if available, falling back all the way to old technologies like long polling if necessary for old browsers. SignalR remains an open source project, but now it's being included in ASP.NET (also open source, hooray!). That means there's real, official ASP.NET engineering work being put into SignalR, and it's even easier to use in an ASP.NET application. Now in any ASP.NET project type, you can right-click / Add / New Item... SignalR Hub or Persistent Connection. And much more... There's quite a bit more. You can find more info at http://asp.net/vnext, and we'll be adding more content as fast as we can. Watch my BUILD talk to see as I demonstrate these and other features in the ASP.NET Fall 2012 Update, as well as some other even futurey-er stuff!

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  • Video games, content strategy, and failure - oh my.

    - by Roger Hart
    Last night was the CS London group's event Content Strategy, Manhattan Style. Yes, it's a terrible title, feeling like a self-conscious grasp for chic, sadly commensurate with the venue. Fortunately, this was not commensurate with the event itself, which was lively, relevant, and engaging. Although mostly if you're a consultant. This is a strong strain in current content strategy discourse, and I think we're going to see it remedied quite soon. Not least in Paris on Friday. A lot of the bloggers, speakers, and commentators in the sphere are consultants, or part of agencies and other consulting organisations. A lot of the talk is about how you sell content strategy to your clients. This is completely acceptable. Of course it is. And it's actually useful if that's something you regularly have to do. To an extent, it's even portable to those of us who have to sell content strategy within an organisation. We're still competing for credibility and resource. What we're doing less is living in the beginning of a project. This was touched on by Jeffrey MacIntyre (albeit in a your-clients kind of a way) who described "the day two problem". Companies, he suggested, build websites for launch day, and forget about the need for them to be ongoing entities. Consultants, agencies, or even internal folks on short projects will live through Day Two quite often: the trainwreck moment where somebody realises that even if the content is right (which it often isn't), and on time (which it often isn't), it'll be redundant, outdated, or inaccurate by the end of the week/month/fickle social media attention cycle. The thing about living through a lot of Day Two is that you see a lot of failure. Nothing succeeds like failure? Failure is good. When it's structured right, it's an awesome tool for learning - that's kind of how video games work. I'm chewing over a whole blog post about this, but basically in game-like learning, you try, fail, go round the loop again. Success eventually yields joy. It's a relatively well-known phenomenon. It works best when that failing step is acutely felt, but extremely inexpensive. Dying in Portal is highly frustrating and surprisingly characterful, but the save-points are well designed and the reload unintrusive. The barrier to re-entry into the loop is very low, as is the cost of your failure out in meatspace. So it's easy (and fun) to learn. Yeah, spot the difference with business failure. As an external content strategist, you get to rock up with a big old folder full of other companies' Day Two (and ongoing day two hundred) failures. You can't send the client round the learning loop - although you may well be there because they've been round it once - but you can show other people's round trip. It's not as compelling, but it's not bad. What about internal content strategists? We can still point to things that are wrong, and there are some very compelling tools at our disposal - content inventories, user testing, and analytics, for instance. But if we're picking up big organically sprawling legacy content, Day Two may well be a distant memory, and the felt experience of web content failure is unlikely to be immediate to many people in the organisation. What to do? My hunch here is that the first task is to create something immediate and felt, but that it probably needs to be a success. Something quickly doable and visible - a content problem solved with a measurable business result. Now, that's a tall order; but scrape of the "quickly" and it's the whole reason we're here. At Red Gate, I've started with the text book fear and passion introduction to content strategy. In fact, I just typo'd that as "contempt strategy", and it isn't a bad description. Yelling "look at this, our website is rubbish!" gets you the initial attention, but it doesn't make you many friends. And if you don't produce something pretty sharp-ish, it's easy to lose the momentum you built up for change. The first thing I've done - after the visual content inventory - is to delete a bunch of stuff. About 70% of the SQL Compare web content has gone, in fact. This is a really, really cheap operation. It's visible, and it's powerful. It's cheap because you don't have to create any new content. It's not free, however, because you do have to validate your deletions. This means analytics, actually reading that content, and talking to people whose business purposes that content has to serve. If nobody outside the company uses it, and nobody inside the company thinks they ought to, that's a no-brainer for the delete list. The payoff here is twofold. There's the nebulous hard-to-illustrate "bad content does user experience and brand damage" argument; and there's the "nobody has to spend time (money) maintaining this now" argument. One or both are easily felt, and the second at least should be measurable. But that's just one approach, and I'd be interested to hear from any other internal content strategy folks about how they get buy-in, maintain momentum, and generally get things done.

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  • Colour coding of the status bar in SQL Server Management Studio - Oh dear

    - by simonsabin
    The new feature in SQL Server 2008 to have your query window status bar colour coded to the server you are on is great. Its a nice way to distinguish production from development servers. Unfortunately it was pointed out to me by a client recently that it doesn't always work. To me that sort of makes it pointless. Its a bit like having breaks that work some of the time. Are you going to place Russian roulette every time you execute the query. Whats more the colour doesn't change if you change the connection. So you can flip between dev and production servers but your status bar stays the colour you set for the dev server. It really annoys me to find features that sort of work. The reason I initially gave up on SQLPrompt was that it didn't work 100% of the time and for that time it didn't work I wasted so much time trying to get it to work I wasted more time than if I didn't have it. (I will say that was 2-3 years ago). If you would like to use this feature but aren't because of these features please vote on these bugs. https://connect.microsoft.com/SQLServer/feedback/details/504418/ssms-make-color-coding-of-query-windows-work-all-the-time https://connect.microsoft.com/SQLServer/feedback/details/361832/update-status-bar-colour-when-changing-connections  

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  • Copyrights, Trademarks, Patents - Oh My!

    - by kennedysteve
    Good references when looking to see if someone really legally owns a name, copyright, etc. Copyrights = http://cocatalog.loc.gov/ Trademarks = http://tess2.uspto.gov Patents = http://patft.uspto.gov/ Website Address = http://www.internic.net/whois.html   Copyright Copyright, a form of intellectual property law, protects original works of authorship including literary, dramatic, musical, and artistic works, such as poetry, novels, movies, songs, computer software, and architecture. Copyright does not protect facts, ideas, systems, or methods of operation, although it may protect the way these things are expressed.   Trademark A trademark protects words, phrases, symbols, or designs identifying the source of the goods or services of one party and distinguishing them from those of others.   Patents Set of exclusive rights to an inventor for a limited period of time in exchange for a public disclosure of an invention.   Website Address (aka "Domain name") The core portion of a website name (such as "apple.com" or "msn.com") of a web site, which is uniquely registered to an individual or company (also found to the right of the @ sign in an email address such as "[email protected]".)   Side note #1. LLC Company Names appear to be registered and maintained by state only. If you want to reserve a LLC name nation wide, you may have to register with each state.   Side note #2. The copyright office's FAQ has a question called "How do I protect my sighting of Elvis?". No kidding. Check it out. http://www.

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  • DotNetNuke is switching to C#, uh oh

    - by Chris Hammond
    If you didn’t see Shaun’s blog post earlier this week you should give it a good read through . The post announced the fact that starting with Version 6.0 (targeted for Q2 2011) DotNetNuke will no longer be developed/released as a VB.NET Application. All development of the core platform will be in C# (this does not mean that the community modules for the platform will change languages). Most of the feedback I have seen so far has been rather positive, most folks who use DotNetNuke on a regular basis...(read more)

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  • await, WhenAll, WaitAll, oh my!!

    - by cibrax
    If you are dealing with asynchronous work in .NET, you might know that the Task class has become the main driver for wrapping asynchronous calls. Although this class was officially introduced in .NET 4.0, the programming model for consuming tasks was much more simplified in C# 5.0 in .NET 4.5 with the addition of the new async/await keywords. In a nutshell, you can use these keywords to make asynchronous calls as if they were sequential, and avoiding in that way any fork or callback in the code. The compiler takes care of the rest. I was yesterday writing some code for making multiple asynchronous calls to backend services in parallel. The code looked as follow, var allResults = new List<Result>(); foreach(var provider in providers) { var results = await provider.GetResults(); allResults.AddRange(results); } return allResults; You see, I was using the await keyword to make multiple calls in parallel. Something I did not consider was the overhead this code implied after being compiled. I started an interesting discussion with some smart folks in twitter. One of them, Tugberk Ugurlu, had the brilliant idea of actually write some code to make a performance comparison with another approach using Task.WhenAll. There are two additional methods you can use to wait for the results of multiple calls in parallel, WhenAll and WaitAll. WhenAll creates a new task and waits for results in that new task, so it does not block the calling thread. WaitAll, on the other hand, blocks the calling thread. This is the code Tugberk initially wrote, and I modified afterwards to also show the results of WaitAll. class Program { private static Func<Stopwatch, Task>[] funcs = new Func<Stopwatch, Task>[] { async (watch) => { watch.Start(); await Task.Delay(1000); Console.WriteLine("1000 one has been completed."); }, async (watch) => { await Task.Delay(1500); Console.WriteLine("1500 one has been completed."); }, async (watch) => { await Task.Delay(2000); Console.WriteLine("2000 one has been completed."); watch.Stop(); Console.WriteLine(watch.ElapsedMilliseconds + "ms has been elapsed."); } }; static void Main(string[] args) { Console.WriteLine("Await in loop work starts..."); DoWorkAsync().ContinueWith(task => { Console.WriteLine("Parallel work starts..."); DoWorkInParallelAsync().ContinueWith(t => { Console.WriteLine("WaitAll work starts..."); WaitForAll(); }); }); Console.ReadLine(); } static async Task DoWorkAsync() { Stopwatch watch = new Stopwatch(); foreach (var func in funcs) { await func(watch); } } static async Task DoWorkInParallelAsync() { Stopwatch watch = new Stopwatch(); await Task.WhenAll(funcs[0](watch), funcs[1](watch), funcs[2](watch)); } static void WaitForAll() { Stopwatch watch = new Stopwatch(); Task.WaitAll(funcs[0](watch), funcs[1](watch), funcs[2](watch)); } } After running this code, the results were very concluding. Await in loop work starts... 1000 one has been completed. 1500 one has been completed. 2000 one has been completed. 4532ms has been elapsed. Parallel work starts... 1000 one has been completed. 1500 one has been completed. 2000 one has been completed. 2007ms has been elapsed. WaitAll work starts... 1000 one has been completed. 1500 one has been completed. 2000 one has been completed. 2009ms has been elapsed. The await keyword in a loop does not really make the calls in parallel.

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  • Pixmaps, ByteBuffers, and Textures....Oh my

    - by odaymichael
    My ultimate goal is to take a specific region of the screen, and redraw it somewhere else. For example, take a square from the upper left hand corner of the screen and redraw it on the lower right hand corner, so that it is basically a copy of that screen section; kind of like a minimap, but at the same scale as the original. I have looked in to pixmaps and bytebuffers. Also maybe copying that region from the backbuffer somehow. Wondering the best way to go about this. Any help is appreciated. I am using opengl es and libgdx for what it's worth.

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  • exact point oh a rotating sphere

    - by nkint
    I have a sphere that represents the heart textured with real pictures. It's rotating about the x axis, and when user click down it has to show me the exact place he clicked on. For example if he clicked on Singapore and the system should be able to: understand that user clicked on the sphere (OK, I'll do it with unProject) understand where user clicked on the sphere (ray-sphere collision?) and take into account the rotation transform sphere-coordinate to some coordinate system good for some web-api service ask to api (OK, this is the simpler thing for me ;-) some advice?

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  • Web 3.Oh No!

    The ripple effect of internet buzzwords has meant that terms such as "Web 2.0" have made their way into the public consciousness. Read any media or internet related content and you will come across the term in there somewhere.

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  • Web 3.Oh No!

    The ripple effect of internet buzzwords has meant that terms such as "Web 2.0" have made their way into the public consciousness. Read any media or internet related content and you will come across the term in there somewhere.

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  • Good Tutorial To Learn C++ Development For Game Boy

    - by Nathan Campos
    I'm learning C++ with this book of Deitel: C++ How to Program, 5/e and some tutorials and resources of the internet, but i want to learn how i can develop Nintendo GameBoy Advance games using C++, but only in resources over the internet, because i don't want to spent money now with a thing that i only want to try.

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  • zsh auto-complete event designator

    - by simont
    (See my previous question for additional context). I'm migrating to zsh from bash, and using oh-my-zsh. When my zsh history looks something like the following: git status git add -A git commit I want to be able to re-run git add -A. To do that, I could use !?git add, which should: !?str[?] Refer to the most recent command containing str. The trailing ‘?’ is necessary if this reference is to be followed by a modifier or followed by any text that is not to be considered part of str. The link for zsh event designators is here. Unfortunately, I can't do this - as I'm typing !?git add, as I hit the ' ', it auto-completes the command to the most recent command matching git (ie, it auto-completes with git commit). I can't use the event designator properly because of this auto-completion as I hit the space. I assume this is an oh-my-zsh feature. I have no idea where to look, though - greping for 'complet' in the oh-my-zsh source doesn't get me anywhere. My question: how do I turn off this feature? Or, if that's not something that's known, where should I be looking - if I was going to implement this auto-complete when whitespace is entered, where would be a logical place to do so in the oh-my-zsh framework?

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  • Web Site Serving, Cloud-Computing, oh, my

    - by Frank
    I'm planning a software based service. To give it a bit of context (type of traffic), assume it similar to facebook in nature (with a little GitHub thrown in). I've been trying to understand my different hosting options. I've been using a shared host with GoDaddy for years just fine. I currently host a Wordpress web site there and I've not had any problems. Quite frankly, they've taken good care of me. However, the nature of a shared hosting environment is limited in nature. For example, I can't do anything but host a web site there. For example, I can not run a Mercurial server. Last time I attempted to build a web application with the intention of eventually launching it via GoDaddy, I ran in to all sorts of troubles because it was shared-hosted. Assembly issues, etc. At the time, the cost and time sank my project. (The lack of direct access was also frustrating.) (to be fair to godaddy, this was over 3 years ago) I've been looking at Rackspace or Amazon as a possible cloud solution but it seems to be just processing power and bandwidth (and an OS). From what I understand, I'd need to get Apache and MySQL Working on my own. The way cloud hosting is priced, however, seems appealing. I figure my final option might be to use a virtual private host. I think this would be more flexible than a shared-host site but less scalable than a cloud based server. So, I guess my question is what is an appropriate solution for someone who intends to build a web application service? I figure that I need to establish a hosting environment now rather than later so I can plan to effectively use the environment. I'd prefer to be fairly economical to start out with. I really can't afford to pay $999 (or even $99) while I build up the site and get the core functionality online but at the same time, I'd like to have the selected environment grow as needed. Thank you.

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  • LDAP, Active Directory and bears, oh my!

    - by Tim Post
    What I have: Workstations running Ubuntu Jaunty mounting /home on a remote NFS server. User accounts are still created locally on each individual workstation. Workstations running Windows XP / Vista NFS server (as noted above) Windows 2008 server All machines share a single private network (LAN). What I need to accomplish: A single, intuitive (GUI driven) place for an office administrator to create user accounts. This should let anyone login to their (linux or windows) workstation, then fire up remote desktop and use the same login to the Windows 2008 server, from any machine on the network. I have read so much on samba, LDAP vs AD, etc and now I'm even more confused than I was before I began researching the problem. Ideally, Linux and Windows users should be able to get to their local files once logged into the Win2008 server. I am a programmer, not an interoperability guru and I'm completely lost on where to even start trying to accomplish this, plus I've run out of things to Google. How would you do this? Is it even possible?

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  • Ubuntu and Windows and Separate HDs, oh my!

    - by LuxuryMode
    Need some major help. Running a Dell XPS/Dimension 630i. It came with "SATA 2 RAID 0 With Dual 500GB Hard Drives." I have installed a new, third non-raided drive and installed Ubuntu on it. So now I have Windows on the original hard drive and Ubuntu Linux on the new HD. When I get to the boot menu where I can select an OS, if I select windows I get an error: "No such drive, no such disk." Also, strangely in the first place, in order to even get to the bootloader menu I have had to disable ALL ports under the RAID config. Unless I do this, I will just get to a never-ending blinking cursor. I have tried every conceivable CMOS config and nothing else works. Tried setting port 3 (the new HD w/ Ubuntu) to first hard disk boot priority. Tried disabling all other ports and enabling the Ubuntu HD port and vice versa. Here's a pic of the error I get when I try to boot to Windows: http://imgur.com/TJ1mS. Also, please note that I can actually access all files from the raided Windows drive through Ubuntu. (Someone suggested just reinstalling windows from installation CD. Agree?)

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  • Big-Oh running time of code in Java (are my answers accurate

    - by Terry Frederick
    the Method hasTwoTrueValues returns true if at least two values in an array of booleans are true. Provide the Big-Oh running time for all three implementations proposed. // Version 1 public boolean has TwoTrueValues( boolean [ ] arr ) { int count = 0; for( int i = 0; i < arr. length; i++ ) if( arr[ i ] ) count++; return count >= 2; } // Version 2 public boolean hasTwoTrueValues( boolean [ ] arr ) { for( int i = 0; i < arr.length; i++ ) for( int j = i + 1; j < arr.length; j++ ) if( arr[ i ] && arr[ j ] ) return true; } // Version 3 public boolean hasTwoTrueValues( boolean [ ] arr ) { for( int i = 0; i < arr.length; i++ if( arr[ i ] ) for( int j = i + 1; j < arr.length; j++ ) if( arr[ j ] ) return true; return false; } For Version 1 I say the running time is O(n) Version 2 I say O(n^2) Version 3 I say O(n^2) I am really new to this Big Oh Notation so if my answers are incorrect could you please explain and help.

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