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  • Identifier for the “completed” stage of a process: 0, 99, something else?

    - by Arnold Sakhnov
    Say, that you are handling a multi-step process (like a complex registration form, with a number of steps the user has go through in order). You need to be able to save the current state of the process (e.g. so the user can come back to that registration form later and continue form the step where they were left off). Obviously, you’ll probably want to give each “step” an identifier you can refer to: 1, 2, 3, 4, etc. You logic will check for this step_id (or whatever you call it) to render the appropriate data. The question: how would you identify the stage after the final step, like the completed registration state (say, that you have to give that last “step” its own id, that’s how your logic is structured). Would it be a 0, 999, a non-integer value, something else entirely?

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  • How do you successfully hire out a few programmers to make it cost effective?

    - by Chris
    Many of us know this situation well: we're a one-man (woman) development team, we need some extra help to keep up with all the tasks, the budget is small and we decide to get some help. But hiring someone is difficult. Either the person is inexperienced and I end up becoming their full-time teacher in the hopes they will produce work they way I want, or the person is skilled but for whatever reason doesn't hand over code within budget that I can just plug in and use without reworking it myself. Any thoughts/ideas?

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  • Scrum for a single programmer?

    - by Rob Perkins
    I'm billed as the "Windows Expert" in my very small company, which consists of myself, a mechanical engineer working in a sales and training role, and the company's president, working in a design, development, and support role. My role is equally as general, but primarily I design and implement whatever programming on our product needs to get done in order for our stuff to run on whichever versions of Windows are current. I just finished watching a high-level overview of the Scrum paradigm, given in a webcast. My question is: Is it worth my time to learn more about this approach to product development, given that my development work items are usually given at a very high level, such as "internationalize and localize the product". If it is, how would you suggest adapting Scrum for the use of just one programmer? What tools, cloud-based or otherwise, would be useful to that end? If it is not, what approach would you suggest for a single programmer to organize his efforts from day to day? (Perhaps the question reduces to that simple question.)

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  • What Functional features are worth a little OOP confusion for the benefits they bring?

    - by bonomo
    After learning functional programming in Haskell and F#, the OOP paradigm seems ass-backwards with classes, interfaces, objects. Which aspects of FP can I bring to work that my co-workers can understand? Are any FP styles worth talking to my boss about retraining my team so that we can use them? Possible aspects of FP: Immutability Partial Application and Currying First Class Functions (function pointers / Functional Objects / Strategy Pattern) Lazy Evaluation (and Monads) Pure Functions (no side effects) Expressions (vs. Statements - each line of code produces a value instead of, or in addition to causing side effects) Recursion Pattern Matching Is it a free-for-all where we can do whatever the programming language supports to the limit that language supports it? Or is there a better guideline?

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  • How To Enable “Stereo Mix” in Windows 7 (to Record Audio)

    - by YatriTrivedi
    Ever need to record something on your computer exactly as it comes out of your speakers?  Enabling “Stereo Mix” will let you do exactly that, and here’s how to do it. Nowadays, most sound cards have the ability to record whatever is being output.  The only hang-up is accessing that recording channel, which can be done rather easily Latest Features How-To Geek ETC How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC Enjoy Old School Style Video Game Fun with Chicken Invaders Hide the Twitter “Litter” in Twitter’s Sidebar Area (Chrome and Iron) Public Domain Day: Reflections on Copyright and the Importance of Public Domain Angry Birds Coming to PS3 and PSP This Week I Hate Mondays Wallpaper for That First Day Back at Work Tune Pop Enhances Android Music Notifications

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  • BFCM &ndash; Big Fat Check Mark

    - by onefloridacoder
    I was installing TFS on my local laptop last week and just got around to setting up my initial collection using the TFS Console tool and “Bang!”  I received a message that told me that my local database didn’t have the full-text search option installed.  I remember the option in a (long) list of options and didn’t remember fiddling with it.   Whatever the reason, if you are installing TFS Basic on your box, make sure you have that little check ticked, or you won’t get the big fat one pictured above.  I installed SQL 2008 Developer edition which worked well for what I needed so far, and just needed to run the “Add Feature” option instead of the “Repair” option. HTH

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  • Tokenizing JavaScript: A look at what’s left after minification

    - by InfinitiesLoop
    Minifiers JavaScript minifiers are popular these days. Closure , YUI Compressor , Microsoft Ajax Minifier , to name a few. Using one is essential for any site that uses more than a little script and cares about performance. Each tool of course has advantages and disadvantages. But they all do a pretty good job. The results vary only slightly in the grand scheme of things. Not enough to make so much of a difference that I’d say you should always use one over the other – use whatever fits in with your...(read more)

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  • Dash music lens doesn't play music files

    - by scofandr
    After installing 12.10 music lens in Dash worked not for a long time. After a little while buttons "Open in directory" and "Play" (or whatever there was) just dissapeared. The only thing I can notice is that I have immediately removed Rhythmbox (as I used to do) and installed Banshee from quantal main. Besides, track length is not being displayed correctly any more. Something like 4838:32 is shown. The situation is the same for both single tracks or albums. But music files from main menu (for example, recent files) in dash have all features working: "E-mail", "Open" and "Play". Is there any way to solve all this? Hope there's no need to reinstall Rhythmbox...

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  • Why is Reinforcement Learning so rarely used in pathfinding?

    - by doug
    The venerable shortest-path graph theoretic algorithm A* and subsequent improvements (e.g., Hierarchical Annotated A*) is clearly the technique of choice for pathfinding in game development. Instead, it just seems to me that RL is a more natural paradigm to move a character around a game space. And yet I'm not aware of a single game developer who has implemented a Reinforcement Learning-based pathfinding engine. (I don't infer from this that the application of RL in pathfinding is 0, just that it's very small relative to A* and friends.) Whatever the reason, it's not because these developers are unaware of RL, as evidenced by the fact that RL is frequently used elsewhere in the game engine. This question is not a pretext for offering an opinion on RL in pathfinding; in fact, i am assuming that the tacit preference for A* et al. over RL is correct--but that preference is not obviously to me and i'm very curious about the reason for it, particularly from anyone who has tried to use RL for pathfinding.

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  • What's a good way to organize samplers for HLSL?

    - by Rei Miyasaka
    According to MSDN, I can have 4096 samplers per context. That's a lot, considering there's only a handful of common sampler states. That tempts me to initialize an array containing a whole bunch of common sampler states, assign them to every device context I use, and then in the pixel shaders refer to them by index using : register(s[n]) where n is the index in the array. If I want more samplers for whatever reason, I can just add them on after the last slot. Does this work? If not, when should I set the samplers? Should it be done when by the mesh renderer? The texture renderer? Or alongside PSSetShader? Edit: That trick I wrote above doesn't work (at least not yet), as the compiler gives me this error message when I try to use the same register twice: error X4500: overlapping register semantics not yet implemented 's0' So how do people usually organize samplers, then?

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  • I'm a happy camper

    - by Paul Nielsen
    I’m satisfied with SQL Server 2008. It meets my needs and I can build whatever I want in the database. There’s no feature that it lacks that blocking my development. SQL Server 2008 is what I see when I close my eyes and dream. Maybe I’m just pleased with my current projects, maybe I’m being dense, maybe I lack imagination, tell me if I’m being stupid, but I feel no compelling need for an upgrade. If Microsoft didn’t ship the new version for 3 or 5 more years, I’d be ok with that. I’m sure there...(read more)

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  • Checking out systems programming, what should I learn, using what resources?

    - by Anto
    I have done some hobby application development, but now I'm interested in checking out systems programming (mainly operating systems, Linux kernel etc.). I know low-level languages like C, and I know minimal amounts of x86 Assembly (should I improve on it?). What resources/books/websites/projects etc. do you recommend for one to get started with systems programming and what topics are important? Note that I know close to nothing about the subject, so whatever resources you suggest should be introductory resources. I still know what the subject is and what it includes etc., but I have not done systems programming before (but some application development, as previously noted, and I'm familiar with a bunch of programming languages as well as software engineering in general and algorithms, data structures etc.).

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  • CQRS - Benefits

    - by Dylan Smith
    Thanks to all the comments and feedback from the last post I think I have a better understanding now of the benefits of CQRS (separate from the benefits of Event Sourcing). I’m going to try and sum it up here, and point out some areas where I could still use some advice: CQRS Benefits Sounds like the primary benefit of CQRS as an architecture is it allows you to create a simpler domain model by sucking out everything related to queries. I can definitely see the benefit to this, in general the domain logic related to commands is the high-value behavior in the software, but the logic required to service the queries would add a lot of low-value “noise” to the domain model that would dilute the high-value (command) behavior – sorting, paging, filtering, pre-fetch paths, etc. Also the most appropriate domain structure for implementing commands might not be the most optimal for implementing queries. To paraphrase Greg, this usually results in a domain model that is mediocre at both, piss-poor at one, or more likely piss-poor at both commands and queries. Not only will you be able to simplify your domain model by pulling out all the query logic, but at least a handful of commands in most systems will probably be “pass-though” type commands with little to no logic that just generate events. If these can be implemented directly in the command-handler and never touch the domain model, this allows you to slim down the domain model even more. Also, if you were to do event sourcing without CQRS, you no longer have a database containing the current state (only the domain model would) which makes it difficult (or impossible) to support ad-hoc querying and/or reporting that is common in most business software. Of course CQRS provides some great scalability benefits, not only scalability but I have to assume that it provides extremely low latency for most operations, especially if you have an asynchronous event bus. I know Greg says that you get a 3x scaling (Commands, Queries, Client) of your ability to perform parallel development, but IMHO, it seems like it only provides 1.5x scaling since even without CQRS you’re going to have your client loosely coupled to your domain - which is still a great benefit to be able to realize. Questions / Concerns If all the queries against an aggregate get pulled out to the Query layer, what if the only commands for that aggregate can be handled in a “pass-through” manner with the command handler directly generating events. Is it possible to have an aggregate that isn’t modeled in the domain model? Are there any issues or downsides to this? I know in the feedback from my previous posts it was suggested that having one domain model handling both commands and queries requires implementing a lot of traversals between objects that wouldn’t be necessary if it was only servicing commands. My question is, do you include traversals in your domain model based on the needs of the code, or based on the conceptual domain model? If none of my Commands require a Customer.Orders traversal, but the conceptual domain includes the concept of a set of orders belonging to a customer – should I model that in my domain model or not? I like the idea of using the Query side of the architecture as a place to put junior devs where the risk of them screwing something up has minimal impact. But I’m not sold on the idea that you can actually outsource it. Like I said in one of my comments on my previous post, the code to handle a query and generate DTO’s is going to be dead simple, but the code to process events and apply them to the tables on the query side is going to require a significant amount of domain knowledge to know which events to listen for to update each of the de-normalized tables (and what changes need to be made when each event is processed). I don’t know about everybody else, but having Indian/Russian/whatever outsourced developers have to do anything that requires significant domain knowledge has never been successful in my experience. And if you need to spec out for each new query which events to listen to and what to do with each one, well that’s probably going to be just as much work to document as it would be to just implement it. Greg made the point in a comment that doing an aggregate query like “Total Sales By Customer” is going to be inefficient if you use event sourcing but not CQRS. I don’t understand why that would be the case. I imagine in that case you’d simply have a method/property on the Customer object that calculated total sales for that customer by enumerating over the Orders collection. Then the application services layer would generate DTO’s off of the Customers collection that included say the CustomerID, CustomerName, TotalSales, or whatever the case may be. As long as you use a snapshotting implementation, I don’t see why that would be anymore inefficient in a DDD+Event Sourcing implementation than in a typical DDD implementation. Like I mentioned in my last post I still have some questions about query logic that haven’t been answered yet, but before I start asking those I want to make sure I have a strong grasp on what benefits CQRS provides.  My main concern with the query logic was that I know I could just toss it all into the query side, but I was concerned that I would be losing the benefits of using CQRS in the first place if I did that.  I want to elaborate more on this though with some example situations in an upcoming post.

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  • Mixing Objective-C and C++: Game Loop Parts

    - by Peteyslatts
    I'm trying to write all of my game in C++ except for drawing and game loop timing. Those parts are going to be in Objective-C for iOS. Right now, I have ViewController handling the update cycle, but I want to create a GameModel class that ViewController could update. I want GameModel to be in C++. I know how to integrate these two classes. My problem is how to have these two parts interact with the drawing and image loading. GameModel will keep track of a list of children of type GameObject. These GameObjects update every frame, and then need to pass position and visibility data to whatever class or method will handle drawing. I feel like I'm answering my own question now (talking it out helps) but would it be a good idea to put all of the visible game objects into an array at the end of the update method, return it, and use that to update graphics inside ViewController?

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  • Oracle WebLogic Server 12c Launch Event - Dec 1, 2011, 10am PT

    - by arungupta
    Calling all IT managers, architects, and developers, to find out how the new release of Oracle WebLogic Server 12c is: Designed to help you seamlessly move into the public or private cloud with an open, standards-based platform Built to drive higher value for your current infrastructure and significantly reduce development time and cost Optimized to run your solutions for Java Platform, Enterprise Edition (Java EE); Oracle Fusion Middleware; and Oracle Fusion Enhanced with transformational platforms and technologies such as Java EE 6, Oracle’s Active GridLink for RAC, Oracle Traffic Director, and Oracle Virtual Assembly Builder When ? Dec 1, 2011, 10am - 12pm PT Where ? Register online! Here are some other links for you to follow: blogs.oracle.com/weblogicserver @OracleWebLogic youtube.com/OracleWebLogic facebook.com/OracleWebLogic Steve Button's Blog Jeff West's Blog WebLogic Forums WebLogic @ OTN Almost ready to unwrap the ribbons, pop open the cork, at the start line ... or whatever fits your analogy :-) And in case you are wondering ... here is a snapshot of WebLogic 12c administration console snapshot:

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  • How to Own Your Own Website (Even If You Can’t Build One) Pt 1

    - by Eric Z Goodnight
    You’ve probably put up plenty of pages and accounts on various services and blogs. But today, learn how to become a real website owner and put together an awesome feature-rich website of your own with little to no experience. Having your own website is expected in many fields. You can host your resume and various files, or put up an online business card to make sure that you’re one of the top results when you do an ego search on Google. Whatever your reason is, you don’t have to pay hundreds (or thousands?) of dollars to have somebody else make a website for you, when you can use free software and cheap hosting to make your own in minutes. In this first part of a multi-part series, we’ll discuss how to put up a simple website and and how to start owning your own domain. How to Own Your Own Website (Even If You Can’t Build One) Pt 1 What’s the Difference Between Sleep and Hibernate in Windows? Screenshot Tour: XBMC 11 Eden Rocks Improved iOS Support, AirPlay, and Even a Custom XBMC OS

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  • TechDays 2010 Portugal - The Day After

    - by Ricardo Peres
    Well, TechDays 2010 Portugal is over, time for a balance. I really enjoyed being a speaker, although my presentation took a lot more time than it should, it was gratifying to see so many people staying until the end. Lots of subjects were left behind, though. My presentation is available at my SkyDrive, here. Soon I will place there the source code, too. I would like to know if you've been there, and, if so, what do you think of my presentation! Feel free to send your thoughts, whatever they are. On the other hand, I saw some really interesting presentations, to name a few, from Nuno Antunes, Nuno Godinho, Filipe Prezado, Nuno Silva and my friend André Lage. I also had the chance to finally meet Caio Proiete and Pedro Perfeito. Perhaps we'll meet again at TechDays Remix, who knows.

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  • Ask the Readers: What Technology Are You Most Thankful For?

    - by Jason Fitzpatrick
    Tomorrow is Thanksgiving for U.S. readers and we’re interested in what technology our readers, celebrating the holiday or otherwise, are most thankful for. Hop into the comments and share. Smartphones? Ebook readers? All that miniaturization that makes your medical equipment tick? Whatever technology you’re most thankful for this year, we’d love to hear all about it. Sound off in the comments with a note on what technology–be it gizmo, gadget, or bit of code–you’re thankful for and what makes it dear to your heart. Check back in on Friday for the What You Said roundup to see what you’re fellow readers are thankful for. Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It How To Delete, Move, or Rename Locked Files in Windows

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  • how non-programmer become developer

    - by Sarang
    Every year there are different types of freshers getting recruited. But, our IT field is not only limited to IT Engineers & Computer Engineers. It is full of all different types of engineers. What is a way an engineer can be a proper developer ? I am asking this because, whatever engineering the student gone for, one can be shifted to IT development if he/she has some particular qualities within. What are those quelities required to be in a developer or required to be implemented to be developer ?

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  • PowerShell Try Catch Finally

    - by PointsToShare
    PowerShell Try Catch Finally I am a relative novice to PowerShell and tried (pun intended) to use the “Try Catch Finally” in my scripts. Alas the structure that we love and use in C# (or even – shudder of shudders - in VB) does not always work in PowerShell. It turns out that it works only when the error is a terminating error (whatever that means). Well, you can turn all your errors to the terminating kind by simply setting - $ErrorActionPreference = "Stop", And later resetting it back to “Continue”, which is its normal setting. Now, the lazy approach is to start all your scripts with: $ErrorActionPreference = "Stop" And ending all of them with: $ErrorActionPreference = "Continue" But this opens you to trouble because should your script have an error that you neglected to catch (it even happens to me!), your session will now have all its errors as “terminating”. Obviously this is not a good thing, so instead let’s put these two setups in the beginning of each Try block and in the Finally block as seen below: That’s All Folks!!

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  • Pyglet: How to use second screen's vsync

    - by BaldDude
    does anybody know if it's possible to use the vsync of the second monitor instead of the first one with pyglet? I have 2 monitors, one running at 60Hz and the other at 120Hz. I want to be able to set my application on whatever monitors I have, and have the application use the monitor's rate to swap the buffers. This needs to be cross platform. I found this information... pyglet.window But I was wondering if anybody knows a way... Thanks for your help.

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  • Screen magnifier wrecks login screen — how to get rid of it?

    - by Jonik
    In the Ubuntu / GNOME login screen, I tried some of the different accessibility settings out of curiosity. Big mistake! Enabling the "use screen magnifier" (or whatever) option breaks down the view horribly, and makes it impossible to even access the settings again: (Right click & View Image for full size) Yes, I tried to access every corner of the screen using the mouse, but there's just chaos everywhere. Fortunately, I can still log in (pressing "Esc" makes the normal login dialog appear on the left-hand monitor). My question is, how to disable the "magnifier" option outside of the login screen itself? (By editing some config file perhaps?) I don't care about getting the magnifier mode to work properly - just make it go away altogether, please.

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  • How do I set up a virtual network interface with its own IP address?

    - by Stefano Palazzo
    I vaguely remember that it's possible to set up virtual network interfaces with their own IP addresses, using only one physical network connection. I can find a few guides on the internet that recommend setting these up in /etc/network/interfaces, but Ubuntu doesn't use this file. Therefore my question: What's the correct way of setting these up in recent versions of Ubuntu? As this is a laptop, and I need it to connect to all kinds of different networks, I want to keep the network manager and all its configuration. To be more clear: at the end of this, I want to have a new network interface (e.g. "eth42") with its own IP address, but using whatever is connected in network manager to send the actual packets. In NM, it should appear as if I just had a second ethernet adapter installed in my system.

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  • Do You Want "Normal?" Good luck!

    - by divya.malik
    By Steve Diamond Much has been written about "The New Normal." One thing is for sure: whatever THAT is, economically speaking we won't be experiencing it anytime soon. Sure, we're well beyond the "no floor" perception of 18 months ago--which is certainly comforting, but ask any senior executive and they'll tell you of the constant rigor necessary to continually adapt to an ever-changing macro environment. This brings me to a suggestion that you tune in to a Deloitte Webinar titled, "The New Normal: Embrace Complexity or Seek to Simplify." It features the perspectives on this very topic of Jessica Blume, a principal at Deloitte; and Kirk Mosher, VP of CRM Marketing at Oracle.

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  • Where to find clients?

    - by Zenph
    Of course, I don't expect anybody give away their 'gold mine' or whatever but I am struggling to see where I should be advertising my services. I have one other developer I work with and we have a lot of happy clients - on freelance websites. Thing is, freelance websites just seem to suck the life out of you when you're being out-bidded by ridiculous rates. I want to attract customers who are more concerned about quality and accountability than price. Any suggestions at all? I'm so lost with this.

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