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Is there a way to receive receive data as unsugned char over UDP on QT

- by user269037

I need to send floating point numbers using UDP connection to a QT application. Now in QT the only function available is qint64 readDatagram ( char * data, qint64 maxSize, QHostAddress * address = 0, quint16 * port = 0 ) which accepts data in the form of signed character buffer. I can convert my float into a string and send it but it will obviously not be very efficient converting a 4 byte float into a much longer sized character buffer. I got hold of these 2 functions to convert a 4 byte float into an unsinged 32 bit integer to transfer over network which works fine for a simple c++ udp program but for QT I need to receive the data as unsigned char. Is it possible to avoid converting the floatinf point data into a string and then sending it ?? uint32_t htonf(float f) { uint32_t p; uint32_t sign; if (f < 0) { sign = 1; f = -f; } else { sign = 0; } p = ((((uint32_t)f)&0x7fff)<<16) | (sign<<31); // whole part and sign p |= (uint32_t)(((f - (int)f) * 65536.0f))&0xffff; // fraction return p; } float ntohf(uint32_t p) { float f = ((p16)&0x7fff); // whole part f += (p&0xffff) / 65536.0f; // fraction if (((p>>31)&0x1) == 0x1) { f = -f; } // sign bit set return f; }

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Configuring asp.net web applications. Best practices

- by Andrew Florko

Hello everybody, There is a lot of configurable information for a web-site: UI messages Number of records used in pagination & other UI parameters Cache duration for web-pages & timeouts Route maps & site structure ... There are many approaches to store all this information also: AppSettings (web.config) Custom sections (web.config) External xml/text files referred from web.config Internal static class(es) of constants Database table(s) ... What approaches do you usually choose for your tasks & what approaches do you find unsuitable? Thank you in advance!

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Access Violation Exception when trying to perform WTSVirtualChannelRead

- by Scott Chamberlain

I am trying to write a hello world type program for using virtual channels in the windows terminal services client. public partial class Form1 : Form { public Form1() { InitializeComponent(); } IntPtr mHandle = IntPtr.Zero; private void Form1_Load(object sender, EventArgs e) { mHandle = NativeMethods.WTSVirtualChannelOpen(IntPtr.Zero, -1, "TSCRED"); } private void button1_Click(object sender, EventArgs e) { int bufferSize = 1024; byte[] buffer = new byte[bufferSize]; int bytesRead = 0; NativeMethods.WTSVirtualChannelRead(mHandle, 0, buffer, bufferSize, ref bytesRead); if (bytesRead != 0) { MessageBox.Show("Got no Data"); } else { MessageBox.Show("Got data: " + bytesRead); } } protected override void Dispose(bool disposing) { if (mHandle != System.IntPtr.Zero) { NativeMethods.WTSVirtualChannelClose(mHandle); } base.Dispose(disposing); } } internal static class NativeMethods { [DllImport("Wtsapi32.dll")] public static extern IntPtr WTSVirtualChannelOpen(IntPtr server, int sessionId, [MarshalAs(UnmanagedType.LPStr)] string virtualName); [DllImport("Wtsapi32.dll", SetLastError = true)] public static extern bool WTSVirtualChannelRead(IntPtr channelHandle, long timeout, byte[] buffer, int length, ref int bytesReaded); [DllImport("Wtsapi32.dll")] public static extern bool WTSVirtualChannelClose(IntPtr channelHandle); } On NativeMethods.WTSVirtualChannelRead(mHandle, 0, buffer, bufferSize, ref bytesRead); I get the following error every time. System.AccessViolationException was unhandled by user code Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt. Source=RemoteForm StackTrace: at RemoteForm.NativeMethods.WTSVirtualChannelRead(IntPtr channelHandle, Int64 timeout, Byte[] buffer, Int32 length, Int32& bytesReaded) at RemoteForm.Form1.button1_Click(Object sender, EventArgs e) in E:\Visual Studio 2010\Projects\RemoteForm\Form1.cs:line 31 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) InnerException: I am sending the data from the MSTSC COM object and ActiveX controll. public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { rdp.Server = "schamberlainvm"; rdp.UserName = "TestAcct"; IMsTscNonScriptable secured = (IMsTscNonScriptable)rdp.GetOcx(); secured.ClearTextPassword = "asdf"; rdp.CreateVirtualChannels("TSCRED"); rdp.Connect(); } private void button1_Click(object sender, EventArgs e) { rdp.SendOnVirtualChannel("TSCRED", "This is a test"); } } //Designer code // // rdp // this.rdp.Enabled = true; this.rdp.Location = new System.Drawing.Point(12, 12); this.rdp.Name = "rdp"; this.rdp.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("rdp.OcxState"))); this.rdp.Size = new System.Drawing.Size(1092, 580); this.rdp.TabIndex = 0; Any help on this would be greatly appreciated.

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How to remove old indexed URLs from Google?

- by Gok Demir

I used Cs-cart for a site. Default installation SEO is not suitable for Turkish accented characters such as "ö" which maps to automatically "ae". Then I modified the php code and now it substitutes "ö" with "o" and "s"-"s" etc. Also I changed a category name to a better one. My problem is, google indexed both previous versions and new versions. Previous wrong urls gives 404 error. I used sitemap addon and send it to google and sitemap does not include wrong urls. However these old urls are still indexed on google. What can I do to remove them. For example http://www.google.com.tr/search?q=%C3%A7ak%C4%B1l+ta%C5%9Flar%C4%B1ndan+babil+site:eeski.com&hl=tr&client=firefox-a&hs=Z31&rls=com.ubuntu:en-US:official&filter=0 gives two top results old wrong url leads to 404: http://www.eeski.com/kitap-dergi/bilim-ve-teknik/cakl-talarndan-babil-kulesine-rakamlarn-evrensel-tarihi-ii.html right current url: http://www.eeski.com/kitap/bilim-ve-teknik/cakil-taslarindan-babil-kulesine-rakamlarin-evrensel-tarihi-ii.html What could I make google only index current urls stated on sitemap?

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Difference between Singleton implemention using pointer and using static object

- by Anon

EDIT: Sorry my question was not clear, why do books/articles prefer implementation#1 over implementation#2? What is the actual advantage of using pointer in implementation of Singleton class vs using a static object? Why do most books prefer this class Singleton { private: static Singleton *p_inst; Singleton(); public: static Singleton * instance() { if (!p_inst) { p_inst = new Singleton(); } return p_inst; } }; over this class Singleton { public: static Singleton& Instance() { static Singleton inst; return inst; } protected: Singleton(); // Prevent construction Singleton(const Singleton&); // Prevent construction by copying Singleton& operator=(const Singleton&); // Prevent assignment ~Singleton(); // Prevent unwanted destruction };

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Getting Greyscale pixel value from RGB colourspace in Java using BufferedImage

- by Andrew Bolster

Anyone know of a simple way of converting the RGBint value returned from <BufferedImage> getRGB(i,j) into a greyscale value? I was going to simply average the RGB values by breaking them up using this; int alpha = (pixel >> 24) & 0xff; int red = (pixel >> 16) & 0xff; int green = (pixel >> 8) & 0xff; int blue = (pixel) & 0xff; and then average red,green,blue. But i feel like for such a simple operation I must be missing something...

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When should I use Perl's AUTOLOAD?

- by Robert S. Barnes

In "Perl Best Practices" the very first line in the section on AUTOLOAD is: Don't use AUTOLOAD However all the cases he describes are dealing with OO or Modules. I have a stand alone script in which some command line switches control which versions of particular functions get defined. Now I know I could just take the conditionals and the evals and stick them naked at the top of my file before everything else, but I find it convenient and cleaner to put them in AUTOLOAD at the end of the file. Is this bad practice / style? If you think so why, and is there a another way to do it? As per brian's request I'm basically using this to do conditional compilation based on command line switches. I don't mind some constructive criticism. sub AUTOLOAD { our $AUTOLOAD; (my $method = $AUTOLOAD) =~ s/.*:://s; # remove package name if ($method eq 'tcpdump' && $tcpdump) { eval q( sub tcpdump { my $msg = shift; warn gf_time()." Thread ".threads->tid().": $msg\n"; } ); } elsif ($method eq 'loginfo' && $debug) { eval q( sub loginfo { my $msg = shift; $msg =~ s/$CRLF/\n/g; print gf_time()." Thread ".threads->tid().": $msg\n"; } ); } elsif ($method eq 'build_get') { if ($pipelining) { eval q( sub build_get { my $url = shift; my $base = shift; $url = "http://".$url unless $url =~ /^http/; return "GET $url HTTP/1.1${CRLF}Host: $base$CRLF$CRLF"; } ); } else { eval q( sub build_get { my $url = shift; my $base = shift; $url = "http://".$url unless $url =~ /^http/; return "GET $url HTTP/1.1${CRLF}Host: $base${CRLF}Connection: close$CRLF$CRLF"; } ); } } elsif ($method eq 'grow') { eval q{ require Convert::Scalar qw(grow); }; if ($@) { eval q( sub grow {} ); } goto &$method; } else { eval "sub $method {}"; return; } die $@ if $@; goto &$method; }

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_mask and Rails

- by Eric Koslow

So I am trying to get the cancan gem to work with my rails 3 app and I've hit a problem. I tried to copy the code that Ryan Bates (the creator of the gem) used in his screen cast, but I get an error saying that roles_mask is not a method. I figure that the _mask method was removed from Ruby/Rails at some point, and I'm now wondering what is the replacement. Here's the code in my user.rb model: named_scope :with_role, lambda { |role| {:conditions => "roles_mask & #{2**ROLES.index(role.to_s)} > 0 "} } ROLES = %w[admin student principal admissions] def roles=(roles) self.roles_mask = (roles & ROLES).map { |r| 2**ROLES.index(r) }.sum end def roles ROLES.reject { |r| ((roles_mask || 0) & 2**ROLES.index(r)).zero? } end def role? roles.include? role.to_s end def role_symbols roles.map(&:to_sym) end I'm using Rails 3 and Ruby 1.9.2dev Thank you

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creating a 3d plane using Frank Luna's technique

- by numerical25

I am creating a 3d plane that lays on the x and z axis. and has hills that extend on the y axis. bulk of the code looks like this float PeaksAndValleys::getHeight(float x, float z)const { return 0.3f*( z*sinf(0.1f*x) + x*cosf(0.1f*z) ); } void PeaksAndValleys::init(ID3D10Device* device, DWORD m, DWORD n, float dx) { md3dDevice = device; mNumRows = m; mNumCols = n; mNumVertices = m*n; mNumFaces = (m-1)*(n-1)*2; // Create the geometry and fill the vertex buffer. std::vector<Vertex> vertices(mNumVertices); float halfWidth = (n-1)*dx*0.5f; float halfDepth = (m-1)*dx*0.5f; for(DWORD i = 0; i < m; ++i) { float z = halfDepth - i*dx; for(DWORD j = 0; j < n; ++j) { float x = -halfWidth + j*dx; // Graph of this function looks like a mountain range. float y = getHeight(x,z); vertices[i*n+j].pos = D3DXVECTOR3(x, y, z); // Color the vertex based on its height. if( y < -10.0f ) vertices[i*n+j].color = BEACH_SAND; else if( y < 5.0f ) vertices[i*n+j].color = LIGHT_YELLOW_GREEN; else if( y < 12.0f ) vertices[i*n+j].color = DARK_YELLOW_GREEN; else if( y < 20.0f ) vertices[i*n+j].color = DARKBROWN; else vertices[i*n+j].color = WHITE; } } D3D10_BUFFER_DESC vbd; vbd.Usage = D3D10_USAGE_IMMUTABLE; vbd.ByteWidth = sizeof(Vertex) * mNumVertices; vbd.BindFlags = D3D10_BIND_VERTEX_BUFFER; vbd.CPUAccessFlags = 0; vbd.MiscFlags = 0; D3D10_SUBRESOURCE_DATA vinitData; vinitData.pSysMem = &vertices[0]; HR(md3dDevice->CreateBuffer(&vbd, &vinitData, &mVB)); // Create the index buffer. The index buffer is fixed, so we only // need to create and set once. std::vector<DWORD> indices(mNumFaces*3); // 3 indices per face // Iterate over each quad and compute indices. int k = 0; for(DWORD i = 0; i < m-1; ++i) { for(DWORD j = 0; j < n-1; ++j) { indices[k] = i*n+j; indices[k+1] = i*n+j+1; indices[k+2] = (i+1)*n+j; indices[k+3] = (i+1)*n+j; indices[k+4] = i*n+j+1; indices[k+5] = (i+1)*n+j+1; k += 6; // next quad } } D3D10_BUFFER_DESC ibd; ibd.Usage = D3D10_USAGE_IMMUTABLE; ibd.ByteWidth = sizeof(DWORD) * mNumFaces*3; ibd.BindFlags = D3D10_BIND_INDEX_BUFFER; ibd.CPUAccessFlags = 0; ibd.MiscFlags = 0; D3D10_SUBRESOURCE_DATA iinitData; iinitData.pSysMem = &indices[0]; HR(md3dDevice->CreateBuffer(&ibd, &iinitData, &mIB)); } My question pretains to the cosf and sinf. I am formiluar with trigonometry and I understand sin, cosine, and tangent. but I am not formiluar with cosf and sinf and what they do. From looking at this example. they have alot to do with finding a y value.

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Removing specific QueryStrings

- by iTayb

Let's assume an aspx page gets multiple querystrings, for example books.aspx?author=Arthor&level=4&year=2004. I'd like to create a button that clears specific querystrings. For example when clearAuthorBtn is clicked, user should be redirected to books.aspx?level=4&year=2004 How can I make it? Thank you very much.

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Psuedo-Backwards Builder Pattern?

- by Avid Aardvark

In a legacy codebase I have a very large class with far too many fields/responsibilities. Imagine this is a Pizza object. It has highly granular fields like: hasPepperoni hasSausage hasBellPeppers I know that when these three fields are true, we have a Supreme pizza. However, this class is not open for extension or change, so I can't add a PizzaType, or isSupreme(), etc. Folks throughout the codebase duplicate the same "if(a && b && c) then isSupreme)" logic all over place. This issue comes up for quite a few concepts, so I'm looking for a way to deconstruct this object into many subobjects, e.g. a pseudo-backwards Builder Pattern. PizzaType pizzaType = PizzaUnbuilder.buildPizzaType(Pizza); //PizzaType.SUPREME Dough dough = PizzaUnbuilder.buildDough(Pizza); Is this the right approach? Is there a pattern for this already? Thanks!

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How to implement Object Databases in Asp.net MVC

- by amexn

I started my project in Asp.net MVC(c#) & SQL Server 2005.I want to implement Object Databases in my project. While searched in google i found "MongoDb" & db4o I didn't have enough knowledge in Object Databases & which one best suited for SQL Server 2005. Please suggest a good example/reference regarding Object Databases implementation in Asp.net MVC application

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Another design-related C++ question

- by Kotti

Hi! I am trying to find some optimal solutions in C++ coding patterns, and this is one of my game engine - related questions. Take a look at the game object declaration (I removed almost everything, that has no connection with the question). // Abstract representation of a game object class Object : public Entity, IRenderable, ISerializable { // Object parameters // Other not really important stuff public: // @note Rendering template will never change while // the object 'lives' Object(RenderTemplate& render_template, /* params */) : /*...*/ { } private: // Object rendering template RenderTemplate render_template; public: /** * Default object render method * Draws rendering template data at (X, Y) with (Width, Height) dimensions * * @note If no appropriate rendering method overload is specified * for any derived class, this method is called * * @param Backend & b * @return void * @see */ virtual void Render(Backend& backend) const { // Render sprite from object's // rendering template structure backend.RenderFromTemplate( render_template, x, y, width, height ); } }; Here is also the IRenderable interface declaration: // Objects that can be rendered interface IRenderable { /** * Abstract method to render current object * * @param Backend & b * @return void * @see */ virtual void Render(Backend& b) const = 0; } and a sample of a real object that is derived from Object (with severe simplifications :) // Ball object class Ball : public Object { // Ball params public: virtual void Render(Backend& b) const { b.RenderEllipse(/*params*/); } }; What I wanted to get is the ability to have some sort of standard function, that would draw sprite for an object (this is Object::Render) if there is no appropriate overload. So, one can have objects without Render(...) method, and if you try to render them, this default sprite-rendering stuff is invoked. And, one can have specialized objects, that define their own way of being rendered. I think, this way of doing things is quite good, but what I can't figure out - is there any way to split the objects' "normal" methods (like Resize(...) or Rotate(...)) implementation from their rendering implementation? Because if everything is done the way described earlier, a common .cpp file, that implements any type of object would generally mix the Resize(...), etc methods implementation and this virtual Render(...) method and this seems to be a mess. I actually want to have rendering procedures for the objects in one place and their "logic implementation" - in another. Is there a way this can be done (maybe alternative pattern or trick or hint) or this is where all this polymorphic and virtual stuff sucks in terms of code placement?

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how to call asp page from html page

- by amol kadam

hello sir, I'm Amol Kadam, totally new for asp.net & html . Sir I got the problem while uploading the pages of html & asp. Sir actually i have one html page name as index.html & other one is asp page name as ContactUsNew.aspx. Sir there is link in html page for contact Us page. & for this link i use the code. <td style="height: 42px"> <p class="menu01"><a href="ContactUsNew.aspx">CONTACT US</a></p> </td> Sir when I run this application in localhost it run successfully, but when I upload these pages on ftp that time the path specified for contact us link on index.html page not switches to contactusnew.aspx page. there is path error occured plz help me......

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Help Converting T-SQL Query to LINQ Query

- by campbelt

I am new to LINQ, and so am struggle over some queries that I'm sure are pretty simple. In any case, I have been hiting my head against this for a while, but I'm stumped. Can anyone here help me convert this T-SQL query into a LINQ query? Once I see how it is done, I'm sure I'll have some question about the syntax: SELECT BlogTitle FROM Blogs b JOIN BlogComments bc ON b.BlogID = bc.BlogID WHERE b.Deleted = 0 AND b.Draft = 0 AND b.[Default] = 0 AND bc.Deleted = 0 GROUP BY BlogTitle ORDER BY MAX([bc].[Timestamp]) DESC Just to show that I have tried to solve this on my own, here is what I've come up with so far, though it doesn't compile, let alone work ... var iqueryable = from blog in db.Blogs join blogComment in db.BlogComments on blog.BlogID equals blogComment.BlogID where blog.Deleted == false && blog.Draft == false && blog.Default == false && blogComment.Deleted == false group blogComment by blog.BlogID into blogGroup orderby blogGroup.Max(blogComment => blogComment.Timestamp) select blogGroup;

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How to extract specific variables from a string?

- by David

Hi, let's say i have the following: $vars="name=david&age=26&sport=soccer&birth=1984"; I want to turn this into real php variables but not everything. By example, the functions that i need : $thename=getvar($vars,"name"); $theage=getvar($vars,"age"); $newvars=cleanup($vars,"name,age"); // Output $vars="name=david&age=26" How can i get only the variables that i need . And how i clean up the $vars from the other variables if possible? Thanks

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Vector is pointing to uninitialized bytes when used in recvfrom call

- by Adam A.

In a function that I am writing I am trying to return a pointer to a vector of unsigned chars. The relevant code is below. std::vector<unsigned char> *ret = new std::vector<unsigned char>(buffSize,'0'); int n = recvfrom(fd_, &((*ret)[0]) ,buffSize, &recvAddress, &sockSize); //This should work too... recvfrom(fd_, ret ,buffSize, &recvAddress, &sockSize); // display chars somehow just for testing for(std::vector<unsigned char>::iterator it=ret->begin(); it<it->end();i++) { std::cout<<*it; } std::cout<<std::endl; ... return ret; When I run this through valgrind I get errors talking about how the buffer in recvfrom is pointing to uninitialized bytes. I've narrowed this down to the vector since I swapped it out for an unsigned char array and everything works fine. Any suggestions?

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latex tabular vertical alignment to top?

- by shoosh

I'm trying to create a simple tabular with two cells of text and two images below them like so: \begin{tabular}[h]{ c | c} \emph{Normal} & \emph{Cone} \\ \includegraphics[width=0.39\textwidth]{images/pipe1} & \includegraphics[width=0.61\textwidth]{images/pipe2} \end{tabular} The first image is shorter than the second and I want it to be aligned at the top of the cell but for some reason it gets aligned to the bottom of the cell instead. I've tried using the array package and do this: \begin{tabular}[h]{ p{0.39\textwidth} | p{0.61\textwidth} } \emph{Normal} & \emph{Cone} \\ \includegraphics[width=0.39\textwidth]{images/pipe1} & \includegraphics[width=0.61\textwidth]{images/pipe2} \end{tabular} But this doesn't change anything. The first image is still aligned to the bottom. Why is that? Could there be something else going on which forces the alignment to stick to the bottom?

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Parsing error when using getSearchResultsForQuery of MGTwitterEngine

- by deep8981

Hi everyone I am doing a search using getSearchResultsForQuery method and i get searchresult too but when i try to print the parsed data i dont get text of all the tweets i am doing this [twitterEngine getSearchResultsForQuery:@"#joke" sinceID:twitterUserId startingAtPage:1 count:5]; and below is the result in console and it shows that i do get data properly but after parsing it does not parse properly.I have not done any change in parsing can anyone say why i am getting this? {"results":[{"profile_image_url":"http://a1.twimg.com/profile_images/580724970/pro_normal.jpg","created_at":"Wed, 21 Apr 2010 19:06:52 +0000","from_user":"Kousani","metadata":{"result_type":"recent"},"to_user_id":null,"text":"#ipl3 has hit hard all other General Entertainment Channels. If this continues every year, may be I will learn play cricket! :D #joke","id":12592706500,"from_user_id":13391246,"geo":null,"iso_language_code":"en","source":"<a href="http://www.tweetdeck.com" rel="nofollow">TweetDeck</a>"},{"profile_image_url":"http://a3.twimg.com/profile_images/815058343/iphone_1_059_normal.JPG","created_at":"Wed, 21 Apr 2010 19:00:59 +0000","from_user":"anamou","metadata":{"result_type":"recent"},"to_user_id":null,"text":"comedyclipsblog: Recent research has shown that six out of seven dwarves aren't happy #joke","id":12592456010,"from_user_id":7635571,"geo":null,"iso_language_code":"en","source":"<a href="http://echofon.com/" rel="nofollow">Echofon</a>"},{"profile_image_url":"http://a1.twimg.com/profile_images/636112472/Jane_New_normal.jpg","created_at":"Wed, 21 Apr 2010 18:55:49 +0000","from_user":"janeprinsep","metadata":{"result_type":"recent"},"to_user_id":20741695,"text":"@grahamtcousins DON'T DOOOOOOO ITTTTT!!!!! #joke","id":12592234721,"from_user_id":74969091,"to_user":"grahamtcousins","geo":null,"iso_language_code":"en","source":"<a href="http://www.tweetdeck.com" rel="nofollow">TweetDeck</a>"},{"profile_image_url":"http://a1.twimg.com/profile_images/779334170/sander_normal.jpg","created_at":"Wed, 21 Apr 2010 18:53:55 +0000","from_user":"SndR22","metadata":{"result_type":"recent"},"to_user_id":null,"text":"RT @MocroDeluxe: Willen jullie lachen?- kom met een #joke dan!","id":12592155790,"from_user_id":85863646,"geo":null,"iso_language_code":"nl","source":"<a href="http://ubertwitter.com" rel="nofollow">UberTwitter</a>"},{"profile_image_url":"http://a1.twimg.com/profile_images/513318990/1257454275_package_toys_normal.png","created_at":"Wed, 21 Apr 2010 18:53:33 +0000","from_user":"Fun_Jokes_Video","metadata":{"result_type":"recent"},"to_user_id":null,"text":"#joke What's Clintons new nick name?: Q. What's Clintons new nick name?\nA. Drippy Dick http://bit.ly/bZWSlJ","id":12592141067,"from_user_id":76430125,"geo":null,"iso_language_code":"en","source":"<a href="http://twitterfeed.com" rel="nofollow">twitterfeed</a>"}],"max_id":12592706500,"since_id":47543983,"refresh_url":"?since_id=12592706500&q=%23joke","next_page":"?page=2&max_id=12592706500&rpp=5&q=%23joke","results_per_page":5,"page":1,"completed_in":0.039389,"warning":"since_id removed for pagination.","query":"%23joke"} 2010-04-22 00:45:53.319 Twitter-Facebook[2090:20b] Got search results for FF1D610A-499C-41B6-B0BA-5D94989F9CF0: ( { "created_at" = 1271876812; "from_user" = Kousani; "profile_image_url" = "http://a1.twimg.com/profile_images/580724970/pro_normal.jpg"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876459; "from_user" = anamou; "profile_image_url" = "http://a3.twimg.com/profile_images/815058343/iphone_1_059_normal.JPG"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876149; "from_user" = janeprinsep; "profile_image_url" = "http://a1.twimg.com/profile_images/636112472/Jane_New_normal.jpg"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876035; "from_user" = SndR22; "profile_image_url" = "http://a1.twimg.com/profile_images/779334170/sander_normal.jpg"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876013; "from_user" = "Fun_Jokes_Video"; "profile_image_url" = "http://a1.twimg.com/profile_images/513318990/1257454275_package_toys_normal.png"; "result_type" = recent; "source_api_request_type" = 35; }, { "completed_in" = 0; "from_user_id" = 76430125; geo = ; id = 12592141067; "iso_language_code" = en; "max_id" = 12592706500; "next_page" = "?page=2&max_id=12592706500&rpp=5&q=%23joke"; page = 1; query = "%23joke"; "refresh_url" = "?since_id=12592706500&q=%23joke"; "results_per_page" = 5; "since_id" = 47543983; source = "twitterfeed"; "source_api_request_type" = 35; text = "#joke What's Clintons new nick name?: Q. What's Clintons new nick name?\nA. Drippy Dick http://bit.ly/bZWSlJ"; "to_user" = grahamtcousins; "to_user_id" = ; warning = "since_id removed for pagination."; } ) 2010-04-22 00:45:53.320 Twitter-Facebook[2090:20b] TEXT is #joke What's Clintons new nick name?: Q. What's Clintons new nick name? A. Drippy Dick http://bit.ly/bZWSlJ

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How to pass user-defined structs using boost mpi

- by lava

I am trying to send a user-defined structure named ABC using boost::mpi::send () call. The given struct contains a vector "data" whose size is determined at runtime. Objects of struct ABC are sent by master to slaves. But the slaves need to know the size of vector "data" so that the sufficient buffer is available on the slave to receive this data. I can work around it by sending the size first and initialize sufficient buffer on the slave before receiving the objects of struct ABC. But that defeats the whole purpose of using STL containers. Does anyone know of a better way to do handle this ? Any suggestions are greatly appreciated. Here is a sample code that describes the intent of my program. This code fails at runtime due to above mentioned reason. struct ABC { double cur_stock_price; double strike_price; double risk_free_rate; double option_price; std::vector <char> data; }; namespace boost { namespace serialization { template<class Archive> void serialize (Archive &ar, struct ABC &abc, unsigned int version) { ar & abc.cur_stock_price; ar & abc.strike_price; ar & abc.risk_free_rate; ar & abc.option_price; ar & bopr.data; } } } BOOST_IS_MPI_DATATYPE (ABC); int main(int argc, char* argv[]) { mpi::environment env (argc, argv); mpi::communicator world; if (world.rank () == 0) { ABC abc_obj; abc.cur_stock_price = 1.0; abc.strike_price = 5.0; abc.risk_free_rate = 2.5; abc.option_price = 3.0; abc_obj.data.push_back ('a'); abc_obj.data.push_back ('b'); world.send ( 1, ANY_TAG, abc_obj;); std::cout << "Rank 0 OK!" << std::endl; } else if (world.rank () == 1) { ABC abc_obj; // Fails here because abc_obj is not big enough world.recv (0,ANY_TAG, abc_obj;); std::cout << "Rank 1 OK!" << std::endl; for (int i = 0; i < abc_obj;.data.size(); i++) std::cout << i << "=" << abc_obj.data[i] << std::endl; } MPI_Finalize(); return 0; }

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How to access the remote OPC server programatically ?

- by Shailesh Jaiswal

I have downloaded & installed the OPCDA.NET client component evaluation & XMLDA.NET client component evaluation. It provides some C# samples for browsing the available OPC Server, connecting to the OPC server, & browsing the available items on the server. I know the programatic way in which we can access the local OPC server. It is provided in the sample C# applications. I have installed the OPC server on another machine ( remote machine ). I have done all the required setting related to the 'dcomcnfg' utility. I can access the remote OPC server from client machine by using the Test Client provided by the OPCDA.NET client component evaluation & XMLDA.NET client component evaluation. But I am unaware of how this can be done programmatically. In the available C# samples I found no such programatic part (coding ) in which we can access the remote OPC server. Can you provide me the code through which I can browse the available remote machines in my network, available OPC server on each machine after selecting the specific machine name, connecting to the OPC server & browsing the available items on the server ? or Can you provide me the any link through which I can resolve the above issue ?

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Link List Problem,

- by david

OK i have a problem with a Link List program i'm trying to Do, the link List is working fine. Here is my code #include <iostream> using namespace std; struct record { string word; struct record * link; }; typedef struct record node; node * insert_Node( node * head, node * previous, string key ); node * search( node *head, string key, int *found); void displayList(node *head); node * delete_node( node *head, node * previous, string key); int main() { node * previous, * head = NULL; int found = 0; string node1Data,newNodeData, nextData,lastData; //set up first node cout <<"Depature"<<endl; cin >>node1Data; previous = search( head, node1Data, &found); cout <<"Previous" <<previous<<endl; head = insert_Node(head, previous, node1Data); cout <<"Depature inserted"<<endl; //insert node between first node and head cout <<"Destination"<<endl; cin >>newNodeData; previous = search( head, newNodeData, &found); cout <<"Previous" <<previous<<endl; head = insert_Node(head, previous, newNodeData); cout <<"Destinationinserted"<<endl; //insert node between second node and head cout <<"Cost"<<endl; cin >>newNodeData; previous = search( head, newNodeData, &found); cout <<"Previous" <<previous<<endl; head = insert_Node(head, previous, newNodeData); cout <<"Cost inserted"<<endl; cout <<"Number of Seats Required"<<endl; //place node between new node and first node cin >>nextData; previous = search( head, nextData, &found); cout <<"Previous" <<previous<<endl; head = insert_Node(head, previous, nextData); cout <<"Number of Seats Required inserted"<<endl; //insert node between first node and head cout <<"Name"<<endl; cin >>newNodeData; previous = search( head, newNodeData, &found); cout <<"Previous" <<previous<<endl; head = insert_Node(head, previous, newNodeData); cout <<"Name inserted"<<endl; //insert node between node and head cout <<"Address "<<endl; cin >>newNodeData; previous = search( head, newNodeData, &found); cout <<"Previous" <<previous<<endl; head = insert_Node(head, previous, newNodeData); cout <<"Address inserted"<<endl; //place node as very last node cin >>lastData; previous = search( head, lastData, &found); cout <<"Previous" <<previous<<endl; head = insert_Node(head, previous, lastData); cout <<"C"<<endl; displayList(head); char Ans = 'y'; //Delete nodes do { cout <<"Enter Keyword to be delete"<<endl; cin >>nextData; previous = search( head, nextData, &found); if (found == 1) head = delete_node( head, previous,nextData); displayList(head); cout <<"Do you want to Delete more y /n "<<endl; cin >> Ans; } while( Ans =='y'); int choice, i=0, counter=0; int fclass[10]; int coach[10]; printf("Welcome to the booking program"); printf("\n-----------------"); do{ printf("\n Please pick one of the following option:"); printf("\n 1) Reserve a first class seat on Flight 101."); printf("\n 2) Reserve a coach seat on Flight 101."); printf("\n 3) Quit "); printf("\n ---------------------------------------------------------------------"); printf("\nYour choice?"); scanf("%d",&choice); switch(choice) { case 1: i++; if (i <10){ printf("Here is your seat: %d " , fclass[i]); } else if (i = 10) { printf("Sorry there is no more seats on First Class. Please wait for the next flight"); } break; case 2: if (i <10){ printf("Here is your Seat Coach: %d " , coach[i]); } else if ( i = 10) { printf("Sorry their is no more Seats on Coach. Please wait for the next flight"); } break; case 3: printf("Thank you and goodbye\n"); //exit(0); } } while (choice != 3); } /******************************************************* search function to return previous position of node ******************************************************/ node * search( node *head, string key, int *found) { node * previous, * current; current = head; previous = current; *found = 0;//not found //if (current->word < key) move through links until the next link //matches or current_word > key while( current !=NULL) { //compare exactly if (key ==current->word ) { *found = 1; break; } //if key is less than word else if ( key < current->word ) break; else { //previous stays one link behind current previous = current; current = previous -> link; } } return previous; } /******************************************************** display function as used with createList ******************************************************/ void displayList(node *head) { node * current; //current now contains the address held of the 1st node similar //to head current = head; cout << "\n\n"; if( current ==NULL) cout << "Empty List\n\n"; else { /*Keep going displaying the contents of the list and set current to the address of the next node. When set to null, there are no more nodes */ while(current !=NULL) { cout << current->word<<endl; current = current ->link; } } } /************************************************************ insert node used to position node (i) empty list head = NULL (ii) to position node before the first node key < head->word (iii) every other position including the end of the list This is done using the following steps (a) Pass in all the details to create the node either details or a whole record (b) Pass the details over to fill the node (C) Use the if statement to add the node to the list **********************************************************/ node * insert_Node( node * head, node * previous, string key ) { node * new_node, * temp; new_node = new node; //create the node new_node ->word = key; new_node -> link = NULL; if (head == NULL || key < head->word ) //empty list { //give address of head to temp temp = head; //head now points to the new_node head = new_node; //new_node now points to what head was pointing at new_node -> link = temp; } else { //pass address held in link to temp temp = previous-> link; //put address of new node to link of previous previous -> link = new_node; //pass address of temp to link of new node new_node -> link = temp; } return head; } node * delete_node( node *head, node * previous, string key) { /* this function will delete a node but will not return its contents */ node * temp; if(key == head->word) //delete node at head of list { temp = head; //point head at the next node head = head -> link; } else { //holds the address of the node after the one // to be deleted temp = previous-> link; /*assign the previous to the address of the present node to be deleted which holds the address of the next node */ previous-> link = previous-> link-> link; } delete temp; return head; }//end delete The problem i have is when i Enter in the Number 2 in the Node(Seats) i like to get a Counter Taken 2 off of 50, some thing like what i have here enter code here int choice, i=0, counter=0; int fclass[10]; int coach[10]; printf("Welcome to the booking program"); printf("\n-----------------"); do{ printf("\n Please pick one of the following option:"); printf("\n 1) Reserve a first class seat on Flight 101."); printf("\n 2) Reserve a coach seat on Flight 101."); printf("\n 3) Quit "); printf("\n ---------------------------------------------------------------------"); printf("\nYour choice?"); scanf("%d",&choice); switch(choice) { case 1: i++; if (i <10){ printf("Here is your seat: %d " , fclass[i]); } else if (i = 10) { printf("Sorry there is no more seats on First Class. Please wait for the next flight"); } break; case 2: if (i <10){ printf("Here is your Seat Coach: %d " , coach[i]); } else if ( i = 10) { printf("Sorry their is no more Seats on Coach. Please wait for the next flight"); } break; case 3: printf("Thank you and goodbye\n"); //exit(0); } } while (choice != 3); How can i get what the User enters into number of Seats into this function

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How do I implement a dispatch table in a Perl OO module?

- by Iain

I want to put some subs that are within an OO package into an array - also within the package - to use as a dispatch table. Something like this package Blah::Blah; use fields 'tests'; sub new { my($class )= @_; my $self = fields::new($class); $self->{'tests'} = [ $self->_sub1 ,$self->_sub2 ]; return $self; } _sub1 { ... }; _sub2 { ... }; I'm not entirely sure on the syntax for this? $self->{'tests'} = [ $self->_sub1 ,$self->_sub2 ]; or $self->{'tests'} = [ \&{$self->_sub1} ,\&{$self->_sub2} ]; or $self->{'tests'} = [ \&{_sub1} ,\&{_sub2} ]; I don't seem to be able to get this to work within an OO package, whereas it's quite straightforward in a procedural fashion, and I haven't found any examples for OO. Any help is much appreciated, Iain

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ASP.NET MVC, Url Routing: Maximum Path (URL) Length

- by Martin Aatmaa

The Scenario I have an application where we took the good old query string URL structure: ?x=1&y=2&z=3&a=4&b=5&c=6 and changed it into a path structure: /x/1/y/2/z/3/a/4/b/5/c/6 We're using ASP.NET MVC and (naturally) ASP.NET routing. The Problem The problem is that our parameters are dynamic, and there is (theoretically) no limit to the amount of parameters that we need to accommodate for. This is all fine until we got hit by the following train: HTTP Error 400.0 - Bad Request ASP.NET detected invalid characters in the URL. IIS would throw this error when our URL got past a certain length. The Nitty Gritty Here's what we found out: This is not an IIS problem IIS does have a max path length limit, but the above error is not this. Learn dot iis dot net How to Use Request Filtering Section "Filter Based on Request Limits" If the path was too long for IIS, it would throw a 404.14, not a 400.0. Besides, the IIS max path (and query) length are configurable: <requestLimits maxAllowedContentLength="30000000" maxUrl="260" maxQueryString="25" /> This is an ASP.NET Problem After some poking around: IIS Forums Thread: ASP.NET 2.0 maximum URL length? http://forums.iis.net/t/1105360.aspx it turns out that this is an ASP.NET (well, .NET really) problem. The shit of the matter is that, as far as I can tell, ASP.NET cannot handle paths longer than 260 characters. The nail in the coffin in that this is confirmed by Phil the Haack himself: Stack Overflow ASP.NET url MAX_PATH limit Question ID 265251 The Question So what's the question? The question is, how big of a limitation is this? For my app, it's a deal killer. For most apps, it's probably a non-issue. What about disclosure? No where where ASP.NET Routing is mentioned have I ever heard a peep about this limitation. The fact that ASP.NET MVC uses ASP.NET routing makes the impact of this even bigger. What do you think?

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can a valid xml body have escaped characters for the '<' and '>' around the element names

- by prmatta

My web service is receiving xml from a third party that looks like this: <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"> <SOAP-ENV:Body> <Foo>bar</Foo> </SOAP-ENV:Body> </SOAP-ENV:Envelope> My jaxws web service rejects this with a parsing error. Also if I try to validate this xml using soapui it says Body with element-only content type cannot have text element. My question is, is that xml valid? Or is the client supposed to send me something without escaping the < and . Any references to xml standards or rules are appreciated.

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