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  • Machine Learning Algorithm for Peer-to-Peer Nodes

    - by FreshCode
    I want to apply machine learning to a classification problem in a parallel environment. Several independent nodes, each with multiple on/off sensors, can communicate their sensor data with the goal of classifying an event as defined by a heuristic, training data or both. Each peer will be measuring the same data from their unique perspective and will attempt to classify the result while taking into account that any neighbouring node (or its sensors or just the connection to the node) could be faulty. Nodes should function as equal peers and determine the most likely classification by communicating their results. Ultimately each node should make a decision based on their own sensor data and their peers' data. If it matters, false positives are OK for certain classifications (albeit undesirable) but false negatives would be totally unacceptable. Given that each final classification will receive good or bad feedback, what would be an appropriate machine learning algorithm to approach this problem with if the nodes could communicate with each other to determine the most likely classification?

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  • .net difference between right shift and left shift keys

    - by Mr AH
    I am currently working on an application which requires different behaviour based on whether the user presses the right or left shift key (RShiftKey, LShiftKey), however when either of these keys is pressed I only see ShiftKey | Shift. Is there something wrong with my keyboard? (laptop) do I need a new keyboard driver/keyboard in order to send the different key commands maybe... This is a pretty massive problem at the moment, as there is no way of testing that the code works (apart from unit tests). Anyone had any experience of the different shift/alt/ctrl keys?

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  • What is the most Word-like ASP.NET custom control that you can buy?

    - by rtemp
    We are looking to implement a rich-text box in an ASP.NET application and our requirements are specific to using the "Track Changes" features of Microsoft Word. The closest thing we found in the RadEditor by Telerik. This is a nice control that has a "Track Changes" button and will give you the ability to track the changes from the text in the box to now. It does not let you track your changes from the two previous versions. We have used CVSWeb in the past and the display was not great but it did have the ability (in a web page) to diff two different versions of text (source code in this case). Does anyone have any experience or know of any web-based diff tools that work nicely with a rich-text editor in the web?

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  • Drupal Custom Form with Filters

    - by dallasclark
    I'm displaying cars on a page created with a view and displays. I want to be able to create a form on the home page to allow people to select the 'make', which will then update the 'models' list based on the 'make' the user selects, 'year' to and from, and 'amount' to and from. What the user selects will of course alter the list of used cars, whether that's on the existing used cars page or a new page. I would be happy to create a custom module if required, just need some direction. Thanks !

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  • Experiences with UI Automation and WPF

    - by soren.enemaerke
    We are developing a rather large WPF based application and would like to include some automated UI testing in our test suite (which already contains a number of unit tests). The UI Automation Framework from Microsoft partly sounds like a perfect fit for programatically launching and interacting with the application in a test setup. However, I've struggled to find solid references for samples and experiences with the technology, the articles and small samples available on MSDN is not enough to convince me that it is a solid choice. So, does anybody have real world experiences using the UI Automation Framework in their test suite? What are the caveats and the gotchas? Any best practices when written tests scripts, can you "record and replay" to a scriptable format, how much should you facilitate the testing from the application, how did you incorporate it in the automatic build? Should we be looking in another direction than the UI Automation Framework? Feel free to post you experiences here or link to some good references I might have missed

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  • Best Installation Software?

    - by Chris
    I am interested in knowing what the best software would be to build an installation package that performs the following: (1) Installs client application (2) Detects all SQL server instances on network, allowing user to select specific database to upgrade (which would then upgrade database using an embedded SQL script) (3) Installs website on a server/location specified by user, and configures IIS 6.0 and/or 7.0 based on settings that I specify. (4) Creates a simple setup.exe - and allows user to choose installation components (listed above, i.e install client app, sql server database, and/or website), and then download selected components from remove server. I have tried NSIS - as was able to create an installation package that will download a compressed (gzip) component from a remote server, decompress the file, install the components, and then remove the gzip file. So, this worked beautifully. The part where I am stuck is to be able to perform the database upgrade and website install. Any suggestions would be great. Thanks. Chris

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  • Lua API for TokyoTyrant

    - by jideel
    Hi SO folks, I didn't managed to find an Lua client/api for TokyoTyrant. Such Api exists for TokyoCabinet, but not for TT. And Perl and Ruby API exists for TT. TT provides a native binary protocol, a memcached-compatible protocol, and an HTTP-oriented protocol. So my questions are : 1/ Do you think using the memcached (using luamemcached) or the HTTP protocol (using luaSocket) is "enough" for most / simple usage, and so a native Lua api is not necessary ? (the app is a simple uuid storage/distributor) ? 2/ Does it make sense to not use TokyoTyrant, but only TokyoCabinet, and use Lua at the application level to provide network and concurrent access to TC, using, say, Copas (Copas is , from their website, "a dispatcher based on coroutines that can be used by TCP/IP servers." ? Thanks.

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  • How to check if two System.Drawing.Color structures represent the same color in 16 bit color depth?

    - by David
    How can I check if two System.Drawing.Color structures represent the same color in 16 bit color depth (or generally based on the value of Screen.PrimaryScreen.BitsPerPixel)? Let's say I set Form.TransparencyKey to Value1 (of Color type), I want to check that when the user selects a new background color for the form (Value2), I don't set the entire form transparent. On 32bit color depth screens I simply compare the two values: if (Value1 == Value2) However, this does not work on 16bit color depth screens, as more Color values for the Value2 would represent the same actual 16bit color as Value1, as I found out the hard way.

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  • VSTO Outlook project

    - by Chris
    I currently have an Outlook 2007 VSTO plug-in which needs to write certain values into the registry. I am programmitically downloading and installing a new stationery into Outlook by saving a htm file into the users App Data folder and then updating the HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\MailSettings\NewTheme registry key which sets which stationery that is currently in use. So far everything is fine for 2007, but I have checked a PC that is running Outlook 2010, and this registry key is in a different spot. Instead of 12.0 as the version it is 14.0, which makes sense. Is there anyway I can determine what version the plugin is installed in, so that I can write the key based on the correct version in the correct location?!? I haven't been able to find anything on this so far, but surely there is a way..?!? Thanks in advance. Chris

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  • portlet 2.0 (jsr286) development with spring

    - by Patrick Cornelissen
    Hi! We are discussing whether it's a good idea to switch from plain portlet development on a liferay installation to spring webmvc portlet based development. We're starting the development of some portlets soon, so now is the time. But the problem I see is that we'd like to use some of the portlet 2.0 features, which won't work with versions older than spring 3.0. (Right?) Has anyone insight, if it's worth the waiting? (When is 3.0 scheduled anyway?) Is the current milestone stable enough? Our first real release will be in the last quarter of the year, so the springsource guys have some time left to get a final out of the door... ;-) Any ideas?

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  • Paypal subscription API - transaction variables not POSTed

    - by morpheous
    I am writing a payments system based around paypal, I am using the HTML 'API'. I am passing the following form fields to PayPal: 'rm' = 2 'return = http://www.example.com/payment-handler.php?token=sometoken Where 'token' is a token I generated. According to the paypal documentation, a return method (rm) of 2 indicates to Paypal that the transaction data be posted back to the callback url using the POST method. When processing items using 'buy_now' buttons, the transaction items are correctly POSTed to my callback url (payment-handler.php), but for 'subscribe' operations, although the callback url is called, no POST data is sent to the url, and also, the 'token' field is missing. Instead, there is a parameter called 'auth'. I cant see anything in the paypal docs about a 'auth' field - so I dont know whats generating it and if I can reliably using it. Can anyone shed some light on this?

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  • Frustrated with Objective-c code...

    - by Moshe
    Well, I've started with iPod/iPhone programming using Head First iPhone Development (O'reilly) and I'm typing code out of the book. There are two problems, one is programming related and the other is not. I don't understand the format of objective-c methods. I'm getting an few errors now, based on source code from the book. Which leads me to my next issue. Some of the code is buggy. I think so because I couldn't get the code to run without modifying it. The book has some typos in the text since it's a first edition and whatnot, but could my "fixing" the code have to do with it? So... Where can I learn more about objective-c methods and how they work in terms of structure and where the return type and arguments go? For those with the book, I'm in the middle of the InstaTweet app towards the beginning. Thanks.

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  • Wordpress Video Portal

    - by choise
    Hi out there, my challenge is to built a video portal, based on wordpress (blog already started). so in the backend there must be a option to add, tag, descripe videos and in frontend the videos must have a comment function, must be searchable and so on. wordpress gives already a large amout of functionallity and i want to use this, comments for example, but also categorisation and tagging. what is the best practise to built such a "plugin" ? where to start? what to use? custom tables and built everything by myself or can i use the blog functionallity to advantage? hopefully everything is clear, comment if not ;)

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  • How do I persist form data across an "access denied" page in Drupal?

    - by Michael T. Smith
    We're building a small sub-site that, on the front page, has a one input box form that users can submit. From there, they're taken to a page with a few more associated form fields (add more details, tag it, etc.) with the first main form field already filled in. This works splendidly, thus far. The problem comes for users that are not logged in. When they submit that first form, they're taken to a (LoginToboggan based) login page that allows them to login. After they login, they redirect to the second form page, but the first main form field isn't filled in -- in other words, the form data didn't persist. How can we store that data and have it persist across the access denied page?

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  • Wrapper around bash, control STDIN and STDOUT

    - by blinry
    I would like to talk to a interactive bash process. Here is an example, so you know what I want to archieve: Program starts a new bash process. User types "ls" into my program. Program sends this command to the bash process. Program reads all available output of the bash (including the prompt) and displays it back to the user. GOTO 1 As you can guess, there is much room for nifty manipulations here and there... ;-) It would be wonderful if this also worked for subprocesses (started by the bash process) and curses-based programs. I would like to implement this functionality in Ruby, and already have experimented with IO.popen, but strange things happen. You are also welcome to do this in other languages.

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  • width of a frustum at a given distance from the near plane

    - by structolite
    I'm using CML to manage the 3D math in an OpenGL-based interface project I'm making for work. I need to know the width of the viewing frustum at a given distance from the eye point, which is kept as a part of a 4x4 matrix that represents the camera. My goal is to position gui objects along the apparent edge of the viewport, but at some distance into the screen from the near clipping plane. CML has a function to extract the planes of the frustum, giving them back in Ax + By + Cz + D = 0 form. This frustum is perpendicular to the camera, which isn't necessarily aligned with the z axis of the perspective projection. I'd like to extract x and z coordinates so as to pin graphical elements to the sides of the screen at different distances from the camera. What is the best way to go about doing it? Thanks!

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  • Rotating text in postscript

    - by Mrgreen
    I have the following postscript code: /outputtext { /data exch def /rot exch def /xfont exch def /Times-Roman findfont xfont scalefont setfont /y1 exch def /x1 exch def x1 y1 moveto rot rotate data show } def % x y fontsize rotation (text) outputtext 20 300 12 0 (text1) outputtext 20 400 12 90 (text2) outputtext 20 500 12 90 (text3) outputtext 20 600 12 0 (text4) outputtext showpage The function simply outputs text based on a x, y co-ords and the text to display, there is also a variable for rotation. For some reason when I output text with a rotation of 0 degrees, all other text that comes after that will not work, I can't seem to figure out why this is the case. In the example above, 'text1' and 'text2' will display, but not 3 and 4.

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  • LINQ Searching Only Allowing Equivalency

    - by Mad Halfling
    Hi folks, I'm trying to filter a set of records based on a sub-object's criteria. This compiles ok recordList = recordList.Where(r => r.Areas.Where(a => a.Area == "Z").Count() > 0); but this doesn't recordList = recordList.Where(r => r.Areas.Where(a => a.Area <= "Z").Count() > 0); giving these errors Cannot convert lambda expression to type 'string' because it is not a delegate type Delegate 'System.Func' does not take '1' arguments Operator '<=' cannot be applied to operands of type 'string' and 'string' != works ok, by any sort of less than or greater than operation fails.

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  • Add own search parameter in jqGrid in Asp.net mvc

    - by paresh
    I have just started working on asp.net mvc and jqgrid. I have a calendar which returns a date, a multiselect list box and apply filter button outside of the grid. Is there a way to pass these filter values to the server-side actionresult GridData() based on the selected date and multiple selected values and also it persist while paging or sorting. public ActionResult GridData(string sidx, string sord, int? page, int? rows, Collection categoryOptions,string fromDate) {..} Thanks!

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  • Sharepoint - Navigation.QuickLaunch has missing items

    - by linqmonkey
    The following code generates an ASCII art tree view of a sharepoint site structure based on the items in the quick launch menu. But some are missing. From googling i've found suggestions that this may be because QuickLaunch only contains items that have been customised. Any idea how to fix this? I want to use the QuickLaunch items as many of the sites have subsites and pages that need to be displayed in a specific order. RecurseNavigation(SPWeb web) { depth++; foreach (SPNavigationNode node in web.Navigation.QuickLaunch) { Console.Write(new String('-', depth)); Console.WriteLine(node.Title + " ("+node.Url+")"); RecurseNavigation(root.OpenWeb(node.Url)); } depth--; }

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  • accessing a static property via COM

    - by joreg
    is it possible to access a static property of a COM object without creating an instance of the object? my situation is this: i have an unmanaged application (written in delphi). this application exposes a COM-based plugininterface. until now i only wrote managed plugins in c#. plugins provide their info (name, author, ..) via a static property that returns an instance of PluginInfo (which implements IPluginInfo). this static property i can access on the managed plugins using http://managedvcl.com. now i want to write unmanaged plugins on the same interface. i can load them using: plug := CreateComObject(TGuid) as IMyPlugInterface; and they run, but i don't know how to read out their PluginInfo. so the question again is: is there another way than implementing IPluginInfo in the plugin-class and only accessing the info after i have created an instance of the plugin?

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  • Haskell: type inference and function composition

    - by Pillsy
    This question was inspired by this answer to another question, indicating that you can remove every occurrence of an element from a list using a function defined as: removeall = filter . (/=) Working it out with pencil and paper from the types of filter, (/=) and (.), the function has a type of removeall :: (Eq a) => a -> [a] -> [a] which is exactly what you'd expect based on its contract. However, with GHCi 6.6, I get gchi> :t removeall removeall :: Integer -> [Integer] -> [Integer] unless I specify the type explicitly (in which case it works fine). Why is Haskell inferring such a specific type for the function?

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  • How do you reconcile IDisposable and IoC?

    - by Mr. Putty
    I'm finally wrapping my head around IoC and DI in C#, and am struggling with some of the edges. I'm using the Unity container, but I think this question applies more broadly. Using an IoC container to dispense instances that implement IDisposable freaks me out! How are you supposed to know if you should Dispose()? The instance might have been created just for you (and therefor you should Dispose() it), or it could be an instance whose lifetime is managed elsewhere (and therefor you'd better not). Nothing in the code tells you, and in fact this could change based on configuration!!! This seems deadly to me. Can any IoC experts out there describe good ways to handle this ambiguity?

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  • ASP.Net MVC Where do you convert from Entities to ViewModels?

    - by Pino
    Title pretty much explains it all, its the last thing I'm trying to work into our project. We are structured with a Service Library which contains a function like so. /// <summary> /// Returns a single category based on the specified ID. /// </summary> public Category GetCategory(int CategoryID) { var RetVal = _session.Single<Category>(x => x.ID == CategoryID); return RetVal; } Now Category is a Entity (We are using Entity Framework) we need to convert that to a CategoryViewModel. Now, how would people structure this? Would you make sure the service function returned a CategoryViewModel? Have the controller pull the data from the service then call another function to covnert to a view model?

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  • How to configure build numbers in Visual Studio to enable dll comparison

    - by jaminto
    Hi Everyone- I am building a C# solution in Visual Studio 2008 that has several projects and project dependencies. I am looking for a way to change dll version numbers ONLY when the code that builds the project changes. I currently use Beyond Compare to compare my locally built version to the production file system. The goal is to ONLY deploy updated dlls. I am using autoincrementing version numbers, and each time you open visual studio and do a build, all dll version numbers increment. The same goes for a full solution rebuild and when a different developer does a build and tries to deploy. Is there a way that i can configure Visual Studio to ONLY increment the build number based on changed file contents? Is there an add in that will do this?It seems a binary comparison of these files will also fail because of the different version numbers within the dlls. Does anyone know of a better tool compare only the contents of dlls?Thanks in advance.

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