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• How to create Python module distribution to gracefully fall-back to pure Python code

  - by Craig McQueen

  I have written a Python module, and I have two versions: a pure Python implementation and a C extension. I've written the __init__.py file so that it tries to import the C extension, and if that fails, it imports the pure Python code (is that reasonable?). Now, I'd like to know what is the best way to distribute this module (e.g. write setup.py) so it can be easily used by people with or without the facility to build, or use, the C extension, just by running: python setup.py install My experience is limited, but I see two possible cases: User does not have MS Visual Studio, or the GCC compiler suite, installed on their machine, to build the C extension User is running IronPython, Jython, or anything other than CPython. I only have used CPython. So I'm not sure how I could distribute this module so that it would work smoothly and be easy to install on those platforms, if they're unable to use the C extension.

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• How to create Python module distribution to gracefully fall-back to pure Python code

  - by Craig McQueen

  I have written a Python module, and I have two versions: a pure Python implementation and a C extension. I've written the __init__.py file so that it tries to import the C extension, and if that fails, it imports the pure Python code (is that reasonable?). Now, I'd like to know what is the best way to distribute this module (e.g. write setup.py) so it can be easily used by people with or without the facility to build, or use, the C extension. My experience is limited but I see two possible cases: User does not have MS Visual Studio, or the GCC compiler suite, installed on their machine, to build the C extension User is running IronPython, Jython, or anything other than CPython. I only have used CPython. So I'm not sure how I could distribute this module so that it would work smoothly and be easy to install on those platforms, if they're unable to use the C extension.

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• local RTP port unreachable when using mjsip/jmf

  - by brian_d

  Hello, I create a sip session with mjsip to an external voip provider. Then I transmit a test wav file over rtp to the provider using RtpManager. The program runs with no errors and I answer the sip call. However, no audio is transmitted. When I diagnose the network traffic with wireshark, I see a bunch of RTP traffic from my localhost (behind some kind of nat) to the voip provider and nothing back. After a while I get the ICMP error "Destination unreachable (Port unreachable)" from the provider to my localhost. The software linphone works using the same localhost and voip provider - though it is using a different sip stack. Any suggestions? Thanks

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• Shadow volume shader optimization (GLSL)

  - by Soubok

  I wondering if there is a way to optimize this vertex shader. This vertex shader projects (in the light direction) a vertex to the far plane if it is in the shadow. void main(void) { vec3 lightDir = (gl_ModelViewMatrix * gl_Vertex - gl_LightSource[0].position).xyz; // if the vertex is lit if ( dot(lightDir, gl_NormalMatrix * gl_Normal) < 0.01 ) { // don't move it gl_Position = ftransform(); } else { // move it far, is the light direction vec4 fin = gl_ProjectionMatrix * ( gl_ModelViewMatrix * gl_Vertex + vec4(normalize(lightDir) * 100000.0, 0.0) ); if ( fin.z > fin.w ) // if fin is behind the far plane fin.z = fin.w; // move to the far plane (needed for z-fail algo.) gl_Position = fin; } }

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• Entity Framework and consuming a WCF service

  - by nakori

  I'm getting data where the database is hidden behind a WCF service. Is it possible to use Entity Framework in a scenario where I have custom objects coming from a web service? (No access to the external database, and no current plans for insert/update/delete logic) Starting with an empty EF model and adding an entity I get this error on compile: No mapping specified for instances of the EntitySet and AssociationSet in the EntityContainer .. Is it possible to make an entity this way, and fill it with data received from an object? (In this case a WCF, but could also be a predefined model class/xml data) If the web service retured a Customer object I could do something like this with a dataset: Make an unbound table and do a loop through the customer properties adding them to a temp row, add it with tbl_Customer.Addtbl_CustomerRow(customerRow) to get my view filled. thanks, nakori

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• Hosted Mac OS X/iPhone development

  - by dwj

  I want to try my hand at developing for the iPhone but I don't have an Intel-based Mac available to me; likewise, my budget doesn't include provisions for getting one anytime soon. I've tried messing around with winchain and that hasn't gone too well. I'm not interested in jail-breaking my phone and installing other tools for developing. I've read posts on using older macs with the development tool-kit but haven't tried it yet. In the end I just want to know I can compile without doing a ton of extra work or finding work-arounds. I don't mind only having access to a CLI compiler. Does anyone know of a hosting service that provides a shell access account on Intel-based Mac OS X machines?

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• WPF TextBox trigger to clear Text

  - by PaN1C_Showt1Me

  Hi ! I have many TextBox controls and I'm trying to write a style that clears the Text property when the Control is disabled. I don't want to have Event Handlers in code behind. I wrote this: <Style TargetType="{x:Type TextBox}"> <Style.Triggers> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Text" Value="{x:Null}" /> </Trigger> </Style.Triggers> </Style> The problem is that if the TextBox is defined like: <TextBox Text={Binding Whatever} /> then the trigger does not work (probably because it's bound) How to overcome this problem?

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• ASP.NET User Control Value

  - by Steven

  I created a DatePicker user control (ASP code below, no code behind) which is simply a textbox, image button, and a sometimes visible calendar. <%@ Control Language="vb" AutoEventWireup="false" _ CodeBehind="myDatePicker.ascx.vb" Inherits="Website.myDate" %> <%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" _ tagprefix="asp" %> <asp:TextBox ID="Date1" runat="server"></asp:TextBox> <asp:Image ID="Image1" runat="server" ImageUrl="~/Calendar_scheduleHS.png" /> <asp:CalendarExtender ID="Date1_CalendarExtender" runat="server" Enabled="True" TargetControlID="Date1" PopupButtonID="Image1" > </asp:CalendarExtender> Can I somehow tie or pass the value of the TextBox as the value of the whole control to use in the calling code?

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• vs2010 asp.net : Procedure or function expects parameter which was not supplied.

  - by dotnet-practitioner

  I have googled for this issue but listed solutions are not working for me... I get the following error message: Procedure or function 'ContactHide' expects parameter '@ContactID', which was not supplied. Here is my setup..What am I missing? Please help? Debugger shows that I am supplying ContactID correctly in my C# code behind code. <asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:MYDBConnectionString1 %>" UpdateCommand="ContactHide" UpdateCommandType="StoredProcedure" > int contactid= Convert.ToInt32(e.CommandArgument); SqlDataSource2.UpdateParameters.Add("@ContactID", System.Data.DbType.Int32, "1"); SqlDataSource2.UpdateParameters["@ContactID"].DefaultValue = contactid.ToString(); SqlDataSource2.Update(); ALTER PROCEDURE dbo.ContactHide @ContactID int /* ( @parameter1 int = 5, @parameter2 datatype OUTPUT ) */ AS Update Contacts set Visible = 0 where ContactID = isnull(@ContactID,-1) /* SET NOCOUNT ON */ RETURN

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• How to use Microsoft.Web.Administration.dll to get the site information the page is running on?

  - by Keith Barrows

  I have a half dozen sites on my server and I would like to get some info from IIS7 to display in the footer of each page (as long as you are an admin of course). I am going through the ServerObject and found Sites but am not finding anything obvious for "this site". What should I do to get at the information for the exact site in IIS7 that the page is running on? For a quick 'hack' style approach I wrote this on my default.aspx page code behind: ServerManager serverMgr = new ServerManager(); foreach (Site site in serverMgr.Sites) { string s = info.Text + site.Name + @"<br/>"; info.Text = s; foreach (Binding binding in site.Bindings) { string t = info.Text + binding.BindingInformation + " | "; string p = t + binding.Protocol + @"<br/>"; info.Text = p; } } TIA

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• Recommendations on resolving a cs1705 error

  - by Scott A. Lawrence

  I'm upgrading a number of solutions from Visual Studio 2008 to Visual Studio 2010RC. In the process of doing this, I've encountered two instances of compiler error cs1705, one for System.Core and another for System.Data.Linq. In each case, an assembly compiled earlier has a reference to the .NET 4.0 version of these system assemblies, while the web project I'm trying to compile only has references to the .NET 3.5 version of them. Adding .NET 4.0 versions of System.Core and System.Data.Linq to the web project doesn't resolve the error. Removing the .NET 3.5 versions of the assemblies so that only the .NET 4.0 versions remain results in even more errors. Any recommendations on how to resolve this error would be greatly appreciated.

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• Generic foreach loop in C#.

  - by mcoolbeth

  The compiler, given the following code, tells me "Use of unassigned local variable 'x'." Any thoughts? public delegate Y Function<X,Y>(X x); public class Map<X,Y> { private Function<X,Y> F; public Map(Function f) { F = f; } public Collection<Y> Over(Collection<X> xs){ List<Y> ys = new List<Y>(); foreach (X x in xs) { X x2 = x;//ys.Add(F(x)); } return ys; } }

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• How to call windows authentication programmatically in sharepoint?

  - by HamdiKavak

  Hi guys, Here is my scenario. When anonymous user visits site collection's default site, custom login form panel is shown. This form is a webUserControl(.ascx file) that is embeded into page as webpart. Then user enters username and password. When submit button has been clicked, authentication will be handled by code behind of custom login form panel. Here is my question. How can I call SharePoint's authentication method with the username and password that is entered by user. Simply, I want users to login through my custom login form panel because default windows authentication window is looking really bad.

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• The Difference between Sharepoint Document Title and Document Name

  I am sorry to ask you guys such a low-level question, but I really can not find out the answer. Hope some mad dogs will not bark for my question. A colleague of mine developed a workflow which auto set title to document. With this workflow,as he put it, he can optimize the research and lookup things like that. However I think it can be done just by name of document. There are must be some kind of story behind this. Could someone help me here? Thanks!

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• How do I make silverlight button transparent while showing the image?

  - by jadoti

  I have a button that is programatically created, it's content is a stack panel with an image and a textblock. This all works great. I want to make the button behind the image and text transparent, so that the image and text looks like it's sitting on the background, but still have all the properties of the button (i.e. someone clicks in the button region it still registers the button click event). I have been playing with opacities, but every opacity I play with dealing with the button seems to set the whole button (image and text included) to that opacity value as well. How can I make the button opaque while making the text and image content still visible? Oh, this is silverlight 3. Thanks in advance.

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• "port forwarding": redirect calls to webservice at port 8081 to port 80

  - by niba

  Hi, a colleague of mine wrote a webservice that runs on port 8081 of our Windows 2008 Server. He uses the class ServiceHost, afaik this means its a standalone host (no IIS or ASP involvement). Note: I'm new into WCF ;) Now there are some issues with clients behind a firewall blocking the requests to remote port 8081 of our server (where the webservice runs). The easiest solution would be: run the webservice host at port 80 ... But: there is also a Apache 2.2 webserver running on the Windows Server, hosting some websites. By default it runs on port 80. My solution after some researching: use a virtual host to route requests to a virtual host (lets say http://webservice.[hostname]:80) to the webservice host (http://[hostname]:8081). Is this a good idea? Can Apache handle forwards to standalone webservice hosts? It would be nice if someone could lead me on to the right track :) Best regards, Niels

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• C# yield in nested method

  - by Fastidious

  If I step through the following code the call to ReturnOne() is skipped. static IEnumerable<int> OneThroughFive() { ReturnOne(); yield return 2; yield return 3; yield return 4; yield return 5; } static IEnumerator<int> ReturnOne() { yield return 1; } I can only assume that the compiler is stripping it out because what I'm doing is not valid. I'd like the ability to isolate my enumeration into various methods. Is this possible?

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• Simplest language to make an interpreter for

  - by None

  I want to make an interpreter of a very simple language for practice. When I say simple I don't mean easy to use, I mean simple. Brainf**k is a good example of a language I want. I already have made a brainf**k interpreter in python (which is the language I would be using to write the interpreter). I would appreciate any suggestions of simple languages. Note: I don't want to make a compiler! I want to make an interpreter.

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• Authenticating from a "child" application via CAS

  - by Rob Wilkerson

  I have a portal application that loads external content (widgets) via an iframe. Users login to CAS via the portal itself. There are a few portal APIs, though, that need to be called from that external content. What information do I have to pass from the portal to the widgets that the widgets can use to make these calls without being rejected by CAS? UPDATE The more I investigate, the more I think that my question boils down to how CAS actually does what it's supposed to do. In other words, how can I go from one site where I've authenticated to another and tell it that I've already done the authentication thing. What's the mechanism behind that and how can I employ in in a web context.

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• LLVM C++ IDE for windows

  - by osgx

  Hello Is there some C/C++ IDE for windows, which is integrated with LLVM compiler (and clang C/C++ analyzer), just like modern Xcode do. I have Dev-Cpp (it uses outdated gcc) and Code::Blocks (with some gcc). But Gcc gives me very cryptic error messages. I want to get some more user-friendly error messages from clang frontend. Yes, clang was not able to be used with complex C++ code, but trunk clang already can compile LLVM itself. So I wonder if is there any of llvm IDEs in development or in beta versions. Thanks.

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• Ruby GUI (non-complex layouts)

  - by Ruby Novice

  I've done quite a bit of research on Ruby GUI design, and it appears to be the one area where Ruby tends to be behind the curve. I've explored the options of MonkeyBars, wxRuby, fxRuby, Shoes, etc. and was just wanted to get some input from the Ruby community. While they're definitely usable, the development on each seems to have fallen off. There is not a great deal of useful documentation or user bases that I could find on any (minus the fxRuby book). I'm just looking to make a simple GUI, so I don't really want to spend hundreds of hours learning the intricacies of the more complex tools or attempt to use something that is no longer even being developed (Shoes is the type of application I'm looking for, but it's extremely buggy and not being actively developed.) Out of all of the options, which would you guys recommend as being the quickest to pick up and that still has some sort of development base? Thanks!

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• telerik nested grid issue

  - by Jeff

  1.Here I am having a grid within a parent grid and there is a link button within the nested grid. 2.For the link button I need to use the item command event of the nested grid or I can use the item command of parent grid as well. 3.The issue is when I click on the link button within nested grid then item command event doesn’t get fired for the nestedgrid.But in case of parent grid its working fine. 4.I have tried handlers and item created event also to use handlers in code behind or in aspx.But nothing helped in getting me item command event hit for the nested grid. 5.Previously in case of repeaters there was one item command which was handling all the grids. I have tried different item command event for child and parent but it also didn’t work.

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• Sending persisted JDO instances over GWT-RPC

  - by Ben Daniel

  I've just started learning Google Web Toolkit and finished writing the Stock Watcher tutorial app. Is my thinking correct that if one wants to persist a business object (like a Stock) using JDO and send it back and forth to/from the client over RPC then one has to create two separate classes for that object: One with the JDO annotations for persisting it on the server and another which is serialisable and used over RPC? I notice the Stock Watcher has separate classes and I can theorise why: Otherwise the gwt compiler would try to generate javascript for everything the persisted class referenced like JDO and com.google.blah.users.User, etc Also there may be logic on the server-side class which doesn't apply to the client and vice-versa. I just want to make sure I'm understanding this correctly. I don't want to have to create two versions of all my business object classes which I want to use over RPC if I don't have to.

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• How to use strace ?

  - by e-satis

  A collegue told me once that the last option when everything has failed to debug on linux was to use strace. I tried to learn the science there is behind this strange tool but I am not a system admin guru and I Don't really get results. So what is it exactly and what does it do ? How to use it ? In which case ? How to understand the output and process it ? In brief, how does this stuff work ? In simple words.

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• are posix pipes lightweight?

  - by Nils Pipenbrinck

  In a linux application I'm using pipes to pass information between threads. The idea behind using pipes is that I can wait for multiple pipes at once using poll(2). That works well in practice, and my threads are sleeping most of the time and only wake up if there is something to do for them. On the user-space the pipes look just like two file-handles. Now I wonder wonder how much resources such a pipes use on the OS side. Btw: In my application I only send single bytes every now and then. Think about my pipes as simple message queues that allow me to wake-up receiving threads, tell them to send some status-data or to terminate.

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