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  • How to format this string in c#

    - by Rohit
    I have a setting stored in database which has a value .jpg|.gif|.png . I want to display it on frontend as ".jpg",".gif" and ".png" in a single string. for example Allowed formats are ".jpg",".gif" and ".png" I was able to seperate it using string fileTypes = String.Join(",", supportedFileTypes.Split('|')) How to specify and clause before the last string. It has to be dynamic. For example if we have .jpg|.gif in database, it should be Allowed formats are ".jpg" and ".gif".

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  • How do I add a condition to all ActiveRecords Queries for a particular model?

    - by Kyle West
    I am using the sentient_user gem to have access to the current_user object in my application. I want to override the default ActiveRecordBase queries to scope them to the current user. For instance, I don't want my users looking at, deleting, modifying other user's orders. I feel like I should be able to override a single (or couple) ActiveRecordBase methods to accomplish this, but I don't know which or how. Thanks in advance.

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  • Benchmarking a particular method in Objective-C

    - by Jasconius
    I have a critical method in an Objective-C application that I need to optimize as much as possible. I first need to take some easy benchmarks on this one single method so I can compare my progress as I optimize. What is the easiest way to track the execution time of a given method in, say, milliseconds, and print that to console.

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  • Union with LINQ to XML

    - by Ryan Riley
    I need to union two sets of XElements into a single, unique set of elements. Using the .Union() extension method, I just get a "union all" instead of a union. Am I missing something? var elements = xDocument.Descendants(w + "sdt") .Union(otherDocument.Descendants(w + "sdt") .Select(sdt => new XElement( sdt.Element(w + "sdtPr") .Element(w + "tag") .Attribute(w + "val").Value, GetTextFromContentControl(sdt).Trim()) ) );

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  • how to connect to ethernet printer throught python?

    - by Prasanth
    How can i connect and send data to a Ethernet receipt printer Epson-T88V through python2.7, i have set the ipaddress of the Ethernet printer manually and the utility software communication is also successful. How do i detect and connect to these printers and send data to print. Is there and module for Ethernet connection in python. Using more than one Ethernet printer and separate data to be printed simultaneously from a single system, i am using windows xp and python 2.7 hope i am clear Thanks.

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  • audio processing using java

    - by Sukhhhh
    We have a requirement where we need to convert from .wav file to .mp3 and we are currently using "Tritonus" library to do that . The concern with that library is that requires "installation" of some "dll" files to the class path. I am wondering are there any API's those allow better processing without local installation. And other question is ,having mp3 format files will make it easier to join the files into a single file than having .wav files ?

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  • Windows C API for UTF8 to 1252

    - by Paul
    I'm familiar with WideCharToMultiByte and MultiByteToWideChar conversions and could use these to do something like: UTF8 - UTF16 - 1252 I know that iconv will do what I need, but does anybody know of any MS libs that will allow this in a single call? I should probably just pull in the iconv library, but am feeling lazy. Thanks

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  • Count warnings in Python 2.4

    - by l0b0
    I've got some tests that need to count the number of warnings raised by a function. In Python 2.6 this is simple, using with warnings.catch_warnings(record=True) as warn: ... self.assertEquals(len(warn), 2) Unfortunately, with is not available in Python 2.4, so what else could I use? I can't simply check if there's been a single warning (using warning filter with action='error' and try/catch), because the number of warnings is significant.

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  • Host a project on Github and Google Code

    - by Abhi Beckert
    Is it possible to have a project hosted on Github and google code? I've been using Google Code for years, and recently started playing with GitHub. I like GitHub a lot, but there's also a long list of Google Code features I really miss. Is it possible/feasible to host a single project on both? Can I use github as the primary repository for my source, but have all revisions automatically sent over to a git repository on Google Code?

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  • looking for automated modeling tool for ASP.Net class diagramming

    - by alchemical
    I'm walking into a project with 500+ classes, and am wondering if anyone has had good experiences with automated modeling tools that can import from ASP.Net /C#? It would be a bonus if I could get an automated model based on all the objects called to completely load a single ASP.Net page, with relationships indicating which objects are calling out to which other ones, etc. Thanks for sharing your thoughts or recomendations.

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  • Method name collision in interface implementation - Java

    - by Bhaskar
    If I have two interfaces , both quite different in their purposes , but with same method signature , how do I make a class implement both without being forced to write a single method that serves for the both the interfaces and writing some convoluted logic in the method implementation that checks for which type of object the call is being made and invoke proper code ? In C# , this is overcome by what is called as explicit interface implementation. Is there any equivalent way in Java ?

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  • users authentication and dht

    - by mtasic
    Lets say that I have only DHT (distributed hash table) implemented (in Python), and I want to build authentication service over P2P network, but without introducing centralized authentication server with such a service. Can it be done, and if so how can I achieve this? I'm familiar with how Skype and Wuala have done this, but I am looking for decentralized solution without single point of failure.

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  • Prevent diagonal scrolling in UIScrollView?

    - by NickD
    How can I force a UIScrollView in which paging and scrolling are on to move vertically or horizontally only? My understanding is that the directionalLockEnabled property should achieve this, but a diagonal swipe still causes the view to scroll diagonally instead of restricting motion to a single axis. Edit: to be clearer, I'd like to allow the user to scroll horizontally OR vertically, but not both simultaneously.

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  • Accessing UI thread of a form?

    - by Nick Brooks
    I'm using C# and I'm making an application where a lot of UI loading must be done in background. Is it possible to do it unsafely and ignore InvalidOperationExceptions? The only way I found it to put try...catch statements around every single line of code but this will take ages as there is too much code.

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  • problem binding ListBox on ObservableCollection<T>

    - by Fabian
    Hello, I have a strange "problem". Could someone explain me why : If I have in an ObservableCollection, twice (or more time) an item with the same value, then the selections of those values in the ListBox won't work properly ? In fact, what the ListBox is doing when I click on an item(Even in single item selection) : It selects the first item from the ObservableCollection collection with a matching value. so in the case if multiple items with same value are in the collection, then only the first one will be selected !

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  • Python double underscore mangling

    - by gnr
    I am a bit confused by this behavior (using python 3.2): class Bar: pass class Foo: def __init__(self): self.__cache = None bar = Bar() bar.__cache = None foo = Foo() print(vars(bar)) #returns {'__cache': None} print(vars(foo)) #returns {'_Foo__cache': None} I've read up a bit on how double-underscores cause attribute names to be "mangled", but I would have expected the same name-mangling in both cases above. The meaning of a single- and a double-underscore before an object name in Python Any ideas what's going on here?

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  • Jquery simple photo manager demo - recycle trash completely

    - by Roman
    Hi, I'm using the Jquery's simple photo manager just as it is and it's working properly. http://jqueryui.com/demos/droppable/photo-manager.html All I need is the possibility to recycle all the elements from the trash by a single click. Sounds simple but I couldn't get it so far. Ok, I'm a newbie to Jquery. Help would be appreciated!

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  • 'add another item' in non-CCK Drupal forms

    - by ceejayoz
    CCK for Drupal has the handy feature of allowing a single CCK field to accept multiple values via a "add another item" button that results in an array of data in the node. I'm wondering if there's any easy way of adapting this for a non-CCK form that I'd be calling by drupal_get_form. I'd rather not have to re-invent the wheel with multi-step form techniques. Anyone done this?

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  • Managing the layout of a Java MainFrame of Canvas3d

    - by John N
    Hi, Im trying to organise the layout of four canvas3d objects in a single MainFrame. Iv tried using some layout managers but none are working (or im doing it wrong). Can anyone give me advice or point me to a way to get this to display the four canvas's as a grid of four? Thanks, John public class Main { public static void Main(){ Window win = new Window(); } } import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.Locale; import javax.media.j3d.PhysicalBody; import javax.media.j3d.PhysicalEnvironment; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.media.j3d.View; import javax.media.j3d.ViewPlatform; import javax.media.j3d.VirtualUniverse; import javax.vecmath.Vector3f; import com.sun.j3d.utils.picking.PickCanvas; public class Universe { boolean camera = true; Canvas3D canvas1, canvas2, canvas3, canvas4; VirtualUniverse universe; Locale locale; TransformGroup vpTrans1, vpTransRight, vpTransFront, vpTransPers; TransformGroup mouseTransform = null; View view1, view2, view3, view4; BranchGroup scene; PickCanvas pickCanvas1 = null; PickCanvas pickCanvas2 = null; PickCanvas pickCanvas3 = null; PickCanvas pickCanvas4 = null; BranchGroup obj = new BranchGroup(); // Create a BranchGroup node for the view platform BranchGroup vpRoot = new BranchGroup(); //Temp vars for cam movement public Universe(Canvas3D c1, Canvas3D c2, Canvas3D c3, Canvas3D c4, BranchGroup scene) { this.canvas1 = c1; this.canvas2 = c2; this.canvas3 = c3; this.canvas4 = c4; this.scene = scene; // Establish a virtual universe that has a single // hi-res Locale universe = new VirtualUniverse(); locale = new Locale(universe); // Create a PhysicalBody and PhysicalEnvironment object PhysicalBody body = new PhysicalBody(); PhysicalEnvironment environment = new PhysicalEnvironment(); // Create a View and attach the Canvas3D and the physical // body and environment to the view. view1 = new View(); view1.addCanvas3D(c1); view1.addCanvas3D(c2); view1.addCanvas3D(c3); view1.addCanvas3D(c4); view1.setPhysicalBody(body); view1.setPhysicalEnvironment(environment); // Create a BranchGroup node for the view platform BranchGroup vpRoot = new BranchGroup(); // Create a ViewPlatform object, and its associated // TransformGroup object, and attach it to the root of the // subgraph. Attach the view to the view platform. Transform3D t = new Transform3D(); t.set(new Vector3f(0.0f, 0.0f, 2.0f)); ViewPlatform vp = new ViewPlatform(); vpTrans1 = new TransformGroup(t); vpTrans1.addChild(vp); vpRoot.addChild(vpTrans1); vpRoot.addChild(scene); view1.attachViewPlatform(vp); // Attach the branch graph to the universe, via the // Locale. The scene graph is now live! locale.addBranchGraph(vpRoot); } } import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.Locale; import javax.media.j3d.PhysicalBody; import javax.media.j3d.PhysicalEnvironment; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.media.j3d.View; import javax.media.j3d.ViewPlatform; import javax.media.j3d.VirtualUniverse; import javax.vecmath.Vector3f; import com.sun.j3d.utils.picking.PickCanvas; public class Universe { boolean camera = true; Canvas3D canvas1, canvas2, canvas3, canvas4; VirtualUniverse universe; Locale locale; TransformGroup vpTrans1, vpTransRight, vpTransFront, vpTransPers; TransformGroup mouseTransform = null; View view1, view2, view3, view4; BranchGroup scene; PickCanvas pickCanvas1 = null; PickCanvas pickCanvas2 = null; PickCanvas pickCanvas3 = null; PickCanvas pickCanvas4 = null; BranchGroup obj = new BranchGroup(); // Create a BranchGroup node for the view platform BranchGroup vpRoot = new BranchGroup(); //Temp vars for cam movement public Universe(Canvas3D c1, Canvas3D c2, Canvas3D c3, Canvas3D c4, BranchGroup scene) { this.canvas1 = c1; this.canvas2 = c2; this.canvas3 = c3; this.canvas4 = c4; this.scene = scene; // Establish a virtual universe that has a single // hi-res Locale universe = new VirtualUniverse(); locale = new Locale(universe); // Create a PhysicalBody and PhysicalEnvironment object PhysicalBody body = new PhysicalBody(); PhysicalEnvironment environment = new PhysicalEnvironment(); // Create a View and attach the Canvas3D and the physical // body and environment to the view. view1 = new View(); view1.addCanvas3D(c1); view1.addCanvas3D(c2); view1.addCanvas3D(c3); view1.addCanvas3D(c4); view1.setPhysicalBody(body); view1.setPhysicalEnvironment(environment); // Create a BranchGroup node for the view platform BranchGroup vpRoot = new BranchGroup(); // Create a ViewPlatform object, and its associated // TransformGroup object, and attach it to the root of the // subgraph. Attach the view to the view platform. Transform3D t = new Transform3D(); t.set(new Vector3f(0.0f, 0.0f, 2.0f)); ViewPlatform vp = new ViewPlatform(); vpTrans1 = new TransformGroup(t); vpTrans1.addChild(vp); vpRoot.addChild(vpTrans1); vpRoot.addChild(scene); view1.attachViewPlatform(vp); // Attach the branch graph to the universe, via the // Locale. The scene graph is now live! locale.addBranchGraph(vpRoot); } }

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  • How to maximize http.sys file upload performance

    - by anelson
    I'm building a tool that transfers very large streaming data sets (possibly on the order of terabytes in a single stream; routinely in the tens of gigabytes) from one server to another. The client portion of the tool will read blocks from the source disk, and send them over the network. The server side will read these blocks off the network and write them to a file on the server disk. Right now I'm trying to decide which transport to use. Options are raw TCP, and HTTP. I really, REALLY want to be able to use HTTP. The HttpListener (or WCF if I want to go that route) make it easy to plug in to the HTTP Server API (http.sys), and I can get things like authentication and SSL for free. The problem right now is performance. I wrote a simple test harness that sends 128K blocks of NULL bytes using the BeginWrite/EndWrite async I/O idiom, with async BeginRead/EndRead on the server side. I've modified this test harness so I can do this with either HTTP PUT operations via HttpWebRequest/HttpListener, or plain old socket writes using TcpClient/TcpListener. To rule out issues with network cards or network pathways, both the client and server are on one machine and communicate over localhost. On my 12-core Windows 2008 R2 test server, the TCP version of this test harness can push bytes at 450MB/s, with minimal CPU usage. On the same box, the HTTP version of the test harness runs between 130MB/s and 200MB/s depending upon how I tweak it. In both cases CPU usage is low, and the vast majority of what CPU usage there is is kernel time, so I'm pretty sure my usage of C# and the .NET runtime is not the bottleneck. The box has two 6-core Xeon X5650 processors, 24GB of single-ranked DDR3 RAM, and is used exclusively by me for my own performance testing. I already know about HTTP client tweaks like ServicePointManager.MaxServicePointIdleTime, ServicePointManager.DefaultConnectionLimit, ServicePointManager.Expect100Continue, and HttpWebRequest.AllowWriteStreamBuffering. Does anyone have any ideas for how I can get HTTP.sys performance beyond 200MB/s? Has anyone seen it perform this well on any environment?

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  • Delphi Phrase Count

    - by Brad
    Does anyone know how to or have some code on counting the number of unique phrases in a document? (Single word, two word phrases, three word phrases). Thanks

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