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• iPad. UIBarButtonItem has an undocumented view of type UIToolbarTextButton. Huh?

  - by dugla

  I have an iPad app where I have a view controller that is the UIGestureRecognizerDelegate for a number of UIGestureRecognizers. I have implemented the following method of UIGestureRecognizerDelegate: - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch { // Double tapping anywhere on the screen hides/shows the toolbar if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]] == YES) { if (touch.tapCount == 2) { self.toolbar.hidden = self.toolbar.isHidden ? NO : YES; } // if (touch.tapCount == 2) } // if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]] == YES) // All gestures are ignored unless they happen on the fullscreen EAGLView if ([touch.view isKindOfClass:[EAGLView class]] == NO) { return NO; } // if ([touch.view isKindOfClass:[EAGLView class]] == NO) return YES; } My setup is a fullscreen EAGLView with a UIToolbar atop the EAGLView. There is a UIBarButtonItem on the toolbar. The idea here is that double-tapping anywhere toggles the appearance of the toolbar. All other gestures must occur on the EAGLView. My problem is that taps directly on the UIBarButtonItem show touch.view to be the UIView subclass UIToolbarTextButton which is undocumented and can't be introspected. Huh? Can someone suggest a work around, preferably that uses introspective goodness of some form? Thanks, Doug Thanks, Doug

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• Fatal error: Call to a member function getAttribute() on a non-object in C:\xampp\htdocs\giftshoes\s

  - by Sadiqur Rahman

  I am getting following error message when using Doctrine ORM in Codeigniter. Please help me... ------------------Doctrin Table Defination------------- abstract class BaseShoes extends Doctrine_Record { public function setTableDefinition() { $this-setTableName('shoes'); $this-hasColumn('sku', 'integer', 11, array('primary' = true, 'autoincrement' = false)); $this-hasColumn('name', 'string', 255); $this-hasColumn('keywords', 'string', 255); $this-hasColumn('description', 'string'); $this-hasColumn('manufacturer', 'string', 20); $this-hasColumn('sale_price', 'double'); $this-hasColumn('price', 'double'); $this-hasColumn('url', 'string'); $this-hasColumn('image', 'string'); $this-hasColumn('category', 'string', 50); } public function setUp() { } } ------------------------Doctrin Table Code ------------------- class ShoesTable extends Doctrine_Table { function getAllShoes($from = 0, $total = 15) { $q = Doctrine_Query::create() -from('Shoes s') -limit($total) -offset($from); return $q->execute(array(), Doctrine::HYDRATE_ARRAY); } } -----------------Model Code----------------- class Shoes extends BaseShoes { function __construct() { $this-table = Doctrine::getTable('shoes'); } public function getAllShoes() { $this-table-getAllShoes(); } } -------------------ERROR I am getting-------------------- ( ! ) Fatal error: Call to a member function getAttribute() on a non-object in C:\xampp\htdocs\giftshoes\system\database\doctrine\Doctrine\Record.php on line 1424 Call Stack Time Memory Function Location 1 0.0011 327560 {main}( ) ..\index.php:0 2 0.0363 3210720 require_once( 'C:\xampp\htdocs\giftshoes\system\codeigniter\CodeIgniter.php' ) ..\index.php:116 3 0.0492 3922368 Welcome-Welcome( ) ..\CodeIgniter.php:201 4 0.0817 6234096 CI_Loader-model( ) ..\welcome.php:14 5 0.0824 6248376 Shoes-__construct( ) ..\Loader.php:184 6 0.0824 6248424 Doctrine_Core::getTable( ) ..\Shoes.php:5 7 0.0824 6248424 Doctrine_Connection-getTable( ) ..\Core.php:1080 8 0.0824 6254304 Doctrine_Table-__construct( ) ..\Connection.php:1123 9 0.0841 6396128 Doctrine_Table-initDefinition( ) ..\Table.php:249 10 0.0841 6397472 Shoes-__construct( ) ..\Table.php:301 11 0.0841 6397680 Doctrine_Access-__set( ) ..\Access.php:0 12 0.0841 6397680 Doctrine_Record-set( ) ..\Access.php:60

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• Design approach, string table data, variables, stl memory usage

  - by howieh

  I have an old structure class like this: typedef vector<vector<string>> VARTYPE_T; which works as a single variable. This variable can hold from one value over a list to data like a table. Most values are long,double, string or double [3] for coordinates (x,y,z). I just convert them as needed. The variables are managed in a map like this : map<string,VARTYPE_T *> where the string holds the variable name. Sure, they are wrapped in classes. Also i have a tree of nodes, where each node can hold one of these variablemaps. Using VS 2008 SP1 for this, i detect a lot of memory fragmentation. Checking against the stlport, stlport seemed to be faster (20% ) and uses lesser memory (30%, for my test cases). So the question is: What is the best implementation to solve this requirement with fast an properly used memory ? Should i write an own allocator like a pool allocator. How would you do this ? Thanks in advance, Howie

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• Removing and then adding MKAnnotations to a MapView is leaving me with a blank MapView

  - by Chris McCall

  A followup to this quesiton: http://stackoverflow.com/questions/2944581/forcing-reload-of-view-when-returning-from-flipsideview-of-utility-application When returning from the flipside view, I'm calling NSArray *annotations = [NSArray arrayWithArray:[mapView annotations]]; [mapView removeAnnotations:annotations]; To remove all the pins from the map (let me know if this isn't the best way to do this). Then: for(Hole *hole in fetchedObjects) { double latitude = [hole.Latitude doubleValue]; cord.latitude = latitude; double longitude = [hole.Longitude doubleValue]; cord.longitude = longitude; WellPlaceMark *placemark = [[WellPlaceMark alloc] initWithCoordinate:cord withWellType:[NSString stringWithString: hole.WellType]]; [mapView addAnnotation:placemark]; } Plus: - (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation{ MKPinAnnotationView *annView=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"currentloc"]; if ([annotation isKindOfClass:[MKUserLocation class]]) return nil; if([annotation isKindOfClass:[WellPlaceMark class]]) { ... } annView.animatesDrop=FALSE; return annView; } All of this code seems to be called in the debugger, but when it's finished, I'm presented with a blank map. I've tried zooming out and the pins are nowhere. The map loads up fine on the first try, but once I call removeAnnotations, they never return.

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• VBS Runtime error code 800A01B6

  - by salvationishere

  I am a newbie to VBS scripting. I am getting above error on line 54, character 5 in script below. This error says "Object doesn't support this property or method: 'MimeMapArray'". And line it is referring to is: MimeMapArray(i) = CreateObject("MimeMap") Can u tell me what I am doing wrong? Here is the script in its entirety. Note, I am trying to run this on an XP OS by double-clicking this VBS file. ' This script adds the necessary Windows Presentation Foundation MIME types ' to an IIS Server. ' To use this script, just double-click or execute it from a command line. ' Running this script multiple times results in multiple entries in the IIS MimeMap. ' Set the MIME types to be added Dim MimeMapObj Dim MimeMapArray Dim WshShell Dim oExec Const ADS_PROPERTY_UPDATE = 2 Dim MimeTypesToAddArray MimeTypesToAddArray = Array(".manifest", "application/manifest", ".xaml", _ "application/xaml+xml", ".application", "application/x-ms-application", _ ".deploy", "application/octet-stream", ".xbap", "application/x-ms-xbap", _ ".xps", "application/vnd.ms-xpsdocument") ' Get the mimemap object Set MimeMapObj = GetObject("IIS://LocalHost/MimeMap") ' Call AddMimeType for every pair of extension/MIME type For counter = 0 to UBound(MimeTypesToAddArray) Step 2 AddMimeType MimeTypesToAddArray(counter), MimeTypesToAddArray(counter+1) Next ' Create a Shell object Set WshShell = CreateObject("WScript.Shell") ' Stop and Start the IIS Service Set oExec = WshShell.Exec("net stop w3svc") Do While oExec.Status = 0 WScript.Sleep 100 Loop Set oExec = WshShell.Exec("net start w3svc") Do While oExec.Status = 0 WScript.Sleep 100 Loop Set oExec = Nothing ' Report status to user WScript.Echo "Windows Presentation Foundation MIME types have been registered." ' AddMimeType Sub Sub AddMimeType(ByVal Ext, ByVal MType) ' Get the mappings from the MimeMap property. MimeMapArray = MimeMapObj.GetEx("MimeMap") ' Add a new mapping. i = UBound(MimeMapArray) + 1 ReDim Preserve MimeMapArray(i) MimeMapArray(i) = CreateObject("MimeMap") MimeMapArray(i).Extension = Ext MimeMapArray(i).MimeType = MType MimeMapObj.PutEx ADS_PROPERTY_UPDATE, "MimeMap", MimeMapArray MimeMapObj.SetInfo() End Sub

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• nMoq basic questions

  - by devoured elysium

  I made the following test for my class: var mock = new Mock<IRandomNumberGenerator>(); mock.Setup(framework => framework.Generate(0, 50)) .Returns(7.0) var rnac = new RandomNumberAverageCounter(mock.Object, 1, 100); rnac.Run(); double result = rnac.GetAverage(); Assert.AreEqual(result, 7.0, 0.1); The problem here was that I changed my mind about what range of values Generate(int min, int max) would use. I ran the test and it failed. I know that that is what it's supposed to happen but I was left wondering if isn't there a way to launch an exception or throw in a message when trying to run the method params. Also, if I want to run this Generate() method 10 times with different values (let's say, from 1 to 10), will I have to make 10 mock setups or something, or is there a special method for it? The best I could think of is this (which isn't bad, I'm just asking if there is other better way): for (int i = 1; i < 10; ++i) { mock.Setup(framework => framework.Generate(1, 100)) .Returns((double)i); } Thanks

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• Calculating skew of text OpenCV

  - by Nick

  I am trying to calculate the skew of text in an image so I can correct it for the best OCR results. Currently this is the function I am using: double compute_skew(Mat &img) { // Binarize cv::threshold(img, img, 225, 255, cv::THRESH_BINARY); // Invert colors cv::bitwise_not(img, img); cv::Mat element = cv::getStructuringElement(cv::MORPH_RECT, cv::Size(5, 3)); cv::erode(img, img, element); std::vector<cv::Point> points; cv::Mat_<uchar>::iterator it = img.begin<uchar>(); cv::Mat_<uchar>::iterator end = img.end<uchar>(); for (; it != end; ++it) if (*it) points.push_back(it.pos()); cv::RotatedRect box = cv::minAreaRect(cv::Mat(points)); double angle = box.angle; if (angle < -45.) angle += 90.; cv::Point2f vertices[4]; box.points(vertices); for(int i = 0; i < 4; ++i) cv::line(img, vertices[i], vertices[(i + 1) % 4], cv::Scalar(255, 0, 0), 1, CV_AA); return angle; } When I look at then angle in debug I get 0.000000 However when I give it this image I get proper results of a skew of about 16 degrees: How can I properly detect the skew in the first image?

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• How to avoid reallocation using the STL (C++)

  - by Tue Christensen

  This question is derived of the topic: http://stackoverflow.com/questions/2280655/vector-reserve-c I am using a datastructur of the type vector<vector<vector<double> > >. It is not possible to know the size of each of these vector (except the outer one) before items (doubles) are added. I can get an approximate size (upper bound) on the number of items in each "dimension". A solution with the shared pointers might be the way to go, but I would like to try a solution where the vector<vector<vector<double> > > simply has .reserve()'ed enough space (or in some other way has allocated enough memory). Will A.reserve(500) (assumming 500 is the size or, alternatively an upper bound on the size) be enough to hold "2D" vectors of large size, say [1000][10000]? The reason for my question is mainly because I cannot see any way of reasonably estimating the size of the interior of A at the time of .reserve(500). An example of my question: vector A; A.reserve(500+1); vector temp2; vector temp1 (666,666); for(int i=0;i<500;i++) { A.push_back(temp2); for(int j=0; j< 10000;j++) { A.back().push_back(temp1); } } Will this ensure that no reallocation is done for A? If temp2.reserve(100000) and temp1.reserve(1000) where added at creation will this ensure no reallocation at all will occur at all? In the above please disregard the fact that memory could be wasted due to conservative .reserve() calls. Thank you all in advance!

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• why i add more insignificant code but cost less time

  - by user3714382

  i write a method and when i add some insignificant code it works faster, like these : array[1]=array[1]; array[0]=array[0]; array[3]=array[3]; array[2]=array[2]; i use double t=System.currentTimeMillis(); at first to record the time. then call the method and use System.out.println(System.currentTimeMillis()-t); in the end. when i delete the code (array[1]=array[1];...) the cost time is 1035.0 ms,but if i add these code, the cost time become 898.0ms. here is my method and my code. PS:this method is use for the game 2048, exp: {2,2,2,2} trans to {0,0,4,4} static void toRight2(int[] array){ if (array[2]==array[3] ) { array[3]=array[2]*2; if (array[0]==array[1]) { array[2]=array[1]*2; array[0]=0; array[1]=0; }else { array[2]=array[1]; array[1]=array[0]; array[0]=0; } } else{ if (array[0]==array[1]) { array[1]=array[1]*2; array[0]=0; array[3]=array[3]; array[2]=array[2]; }else { array[1]=array[1];//delete this cost more time array[0]=array[0];//delete this cost more time array[3]=array[3];//delete this cost more time array[2]=array[2];//delete this cost more time } } } public static void main(String[] args) { double t=System.currentTimeMillis(); int[] array={1,2,3,3}; for (int j = 2; j <400*1000000; j++) { toRight2(array); } System.out.println(System.currentTimeMillis()-t); }

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• How to deploy a WPF 4 Full Trust XBAP an on intranet?

  - by sparks

  I'm having trouble running a full trust WPF 4 XBAP (browser application), created with Visual Studio 2010, from my intranet. I do not get a ClickOnce elevation prompt, as described in ScottGu's post on WPF 4: Full Trust XBAP Deployment Starting in WPF 4, the ClickOnce elevation prompt is also enabled for XAML Browser Applications (XBAPs) in Intranet and Trusted Zones, making it easier to deploy full-trust XBAPs. For XBAPs that require security permissions greater than the minimum code access security (CAS) permission grantset of the Intranet and Trusted Zones, the user will be able to click 'Run' on the ClickOnce elevation prompt when they navigate to the XBAP to allow the XBAP to run with the requested permissions. Instead, I get the "Trust Not Granted" message. I'm running the application in two ways; in both cases, I get the "Trust Not Granted" message. First, I'm launching the application by double-clicking on the xbap file from my NAS on the local network. Secondly, I'm also trying to launch the application when it is hosted on a website via IIS from the same machine. Are both of these scenarios considered to be run from an "intranet?" Or does "intranet" mean some in particular here? Or am I doing something completely wrong? Of note, I am able to launch the application without problem when I simply double-click the xbap from my local computer. The xbap in question was created specifically to test the ClickOnce elevation prompt. It was created with Visual Studio 2010 as a WPF Browser Application. The only change I made was to change this to a full trust application (My Project Security tab This is a full trust application). In the publish wizard, I am choosing the following: Where do you want to publish the application? - I chose to publish to a local directory How will user install the application? - I chose "From a CD-ROM or DVD-ROM" Will the application be available offline - All choices were grayed out

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• Java random values and duplicates

  - by f-Prime

  I have an array (cards) of 52 cards (13x4), and another array (cardsOut) of 25 cards (5x5). I want to copy elements from the 52 cards into the 25 card array by random. Also, I dont want any duplicates in the 5x5 array. So here's what I have: double row=Math.random() *13; double column=Math.random() *4; boolean[][] duplicates=new boolean[13][4]; pokerGame[][] cardsOut = new pokerGame[5][5]; for (int i=0;i<5;i++) for (int j=0;j<5;j++){ if(duplicates[(int)row][(int)column]==false){ cardsOut[i][j]=cards[(int)row][(int)column]; duplicates[(int)row][(int)column]=true; } } 2 problems in this code. First, the random values for row and column are only generated once, so the same value is copied into the 5x5 array every time. Since the same values are being copied every time, I'm not sure if my duplicate checker is very effective, or if it works at all. How do I fix this?

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• Android: Nexus One - Geocoder causes IOException - works perfectly with other devices and emulator

  - by Stefan Klumpp

  The code below works perfectly for real devices running on 1.5, 1.6 and 2.0 as well as the emulator running on 2.1. However, executing it on the Nexus One (running 2.1) raises an IOException: java.io.IOException: Unable to parse response from server at android.location.Geocoder.getFromLocation(Geocoder.java:124) That's the code snippet where it happens: Double myLatitude = AppObject.myLocation.getLatitude(); Double myLongitude = AppObject.myLocation.getLongitude(); DEBUG.i(TAG, "My location: " + myLatitude + " | " + myLongitude); Geocoder geocoder = new Geocoder(MainActivity.this); java.util.List<Address> addressList; try { addressList = geocoder.getFromLocation(myLatitude, myLongitude, 5); if(addressList!=null && addressList.size()>0) { currentAddress = new String(); DEBUG.i(TAG,addressList.get(0).toString()); currentAddress = addressList.get(0).getAddressLine(0) + ", " + addressList.get(0).getAddressLine(1) + ", " + addressList.get(0).getAddressLine(2); } return true; } catch (IOException e) { e.printStackTrace(); return false; }

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• Is there a better way of launching same app from GUI or Command line

  - by markhunte

  Hi All, I worked out a way of running my Cocoa (GUI) app. From either the normal double clicking it, Or from the CLI. I realised that when an app launches from a double click (GUI), it returns an argument count (argc) of 0. But when launched from the CLI it will have an argc of 1. So long as I do not put any arguments myself. Which means I can use if.. else.. to determine how the app was launched. This works fine for my app as I do not need to put arguments. But I wondered if there was a better way of doing it. Here is an example of the code in the main.m int main (int argc, const char * argv[]) { //This determins if the app is launched from the command line or app itself is opened. if (argc == 1) { //app was run from CLI // Create a object MyClass *mMyClass; mMyClass = [[MyClass alloc] init]; // Read the Buffer [mMyClass readBuffer]; // Write out file on disk [mMyClass createFile]; [mMyClass doMoreStuff]; [mMyClass release]; mMyClass = nil; return 0; } else { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; //app was doubled click, (Opened) return NSApplicationMain(argc, (const char **) argv); [pool drain]; // */ // return NSApplicationMain(argc, (const char **) argv); }} Many Thanks. M

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• Create ntp time stamp from gettimeofday

  - by krunk

  I need to calculate an ntp time stamp using gettimeofday. Below is how I've done it with comments on method. Look good to you guys? (minus error checking). Also, here's a codepad link. #include <unistd.h> #include <sys/time.h> const unsigned long EPOCH = 2208988800UL; // delta between epoch time and ntp time const double NTP_SCALE_FRAC = 4294967295.0; // maximum value of the ntp fractional part int main() { struct timeval tv; uint64_t ntp_time; uint64_t tv_ntp; double tv_usecs; gettimeofday(&tv, NULL); tv_ntp = tv.tv_sec + EPOCH; // convert tv_usec to a fraction of a second // next, we multiply this fraction times the NTP_SCALE_FRAC, which represents // the maximum value of the fraction until it rolls over to one. Thus, // .05 seconds is represented in NTP as (.05 * NTP_SCALE_FRAC) tv_usecs = (tv.tv_usec * 1e-6) * NTP_SCALE_FRAC; // next we take the tv_ntp seconds value and shift it 32 bits to the left. This puts the // seconds in the proper location for NTP time stamps. I recognize this method has an // overflow hazard if used after around the year 2106 // Next we do a bitwise AND with the tv_usecs cast as a uin32_t, dropping the fractional // part ntp_time = ((tv_ntp << 32) & (uint32_t)tv_usecs); }

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• Replace Temp with Query

  - by student

  The Replace Temp with Query refactoring method is recommended quite widely now but seems to be very inefficient for very little gain. The method from the Martin Fowler's site gives the following example: Extract the expression into a method. Replace all references to the temp with the expression. The new method can then be used in other methods. double basePrice = _quantity * _itemPrice; if (basePrice > 1000) return basePrice * 0.95; else return basePrice * 0.98; becomes if (basePrice() > 1000) return basePrice() * 0.95; else return basePrice() * 0.98; double basePrice() { return _quantity * _itemPrice; } Why is this a good idea? surely it means the calculation is needlessly repeated and you have the overhead of calling a function. I know CPU cycles are cheap but throwing them away like this seems careless? Am I missing something?

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• DotNetOpenAuth OpenID on ISA 2006 Reverse Proxy problem

  - by userb00

  I am trying to host my site that uses DotNetOpenAuth (OpenID) behind ISA 2006 (reverse proxy), and after it authenticated with a provider (such as Google), and it returns with a URL with %253A in the URL. However, ISA HTTP filter rejects the request. What I need to do is, on ISA web publishing rule, right click config HTTP policy properties uncheck "Verify Normalization" and it worked. Is this a problem on ISA 2006 generally? Are other firewalls having similar problems? Or, is it an OpenID or DotNetOpenAuth issue? Is it safe to disable Normalization checking on ISA? According to MSDN, quote "Web servers receive requests that are URL encoded. This means that certain characters may be replaced with a percent sign (%) followed by a particular number. For example, %20 corresponds to a space, so a request for http://myserver/My%20Dir/My%20File.htm is the same as a request for http://myserver/My Dir/My File.htm. Normalization is the process of decoding URL-encoded requests. Because the % can be URL encoded, an attacker can submit a carefully crafted request to a server that is basically double-encoded. If this occurs, Internet Information Services (IIS) may accept a request that it would otherwise reject as not valid. When you select Verify Normalization, the HTTP filter normalizes the URL two times. If the URL after the first normalization is different from the URL after the second normalization, the filter rejects the request. This prevents attacks that rely on double-encoded requests. Note that while we recommend that you use the Verify Normalization function, it may also block legitimate requests that contain a %."

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• Getting snapshot from webcam in Matlab

  - by Harsh

  I have created a simple GUI to preview webcam stream and to get snapshot from it. For this I have created on axes to show video, one push button(pushbutton1) to start preview, one push button(pushbutton2) to get snapshot. Following is the code for these two push buttons. function pushbutton1_Callback(hObject, eventdata, handles) % hObject handle to pushbutton1 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) axes(handles.axes1); vidObj = videoinput('winvideo',1); videoRes = get(vidObj, 'VideoResolution'); numberOfBands = get(vidObj, 'NumberOfBands'); handleToImage = image( zeros([videoRes(2), videoRes(1), numberOfBands], 'uint8') ); preview(vidObj, handleToImage); % --- Executes on button press in pushbutton2. function pushbutton2_Callback(hObject, eventdata, handles) % hObject handle to pushbutton2 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) a=getsnapshot(get(axes,'Children')); imshow(a); In pushbutton2_Callback I am trying to get child of axes ie. vidObj. But this gives me error ??? Undefined function or method 'getsnapshot' for input arguments of type 'double'.. Why is it returing double type instead of child object vidObj? How can I fix it and get snapshot? Is there any other better way? (I just started learning GUI.) Thanks.

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• Attempting my first fortran 95 program, to solve quadratic eqn. Getting weird errors.

  - by Damon

  So, I'm attempting my first program in Fortran, trying to solve quadratic eqn. I have double and triple checked my code and don't see anything wrong. I keep getting "Invalid character in name at (1)" and "Unclassifiable statement at (1)" at various locations. Any help would be greatly appreciated... ! This program solves quadratic equations ! of the form ax^2 + bx + c = 0. ! Record: ! Name: Date: Notes: ! Damon Robles 4/3/10 Original Code PROGRAM quad_solv IMPLICIT NONE ! Variables REAL :: a, b, c REAL :: discrim, root1, root2, COMPLEX :: comp1, comp2 CHARACTER(len=1) :: correct ! Prompt user for coefficients. WRITE(*,*) "This program solves quadratic equations " WRITE(*,*) "of the form ax^2 + bx + c = 0. " WRITE(*,*) "Please enter the coefficients a, b, and " WRITE(*,*) "c, separated by commas:" READ(*,*) a, b, c WRITE(*,*) "Is this correct: a = ", a, " b = ", b WRITE(*,*) " c = ", c, " [Y/N]? " READ(*,*) correct IF correct = N STOP IF correct = Y THEN ! Definition discrim = b**2 - 4*a*c ! Calculations IF discrim > 0 THEN root1 = (-b + sqrt(discrim))/(2*a) root2 = (-b - sqrt(discrim))/(2*a) WRITE(*,*) "This equation has two real roots. " WRITE(*,*) "x1 = ", root1 WRITE(*,*) "x2 = ", root2 IF discrim = 0 THEN root1 = -b/(2*a) WRITE(*,*) "This equation has a double root. " WRITE(*,*) "x1 = ", root1 IF discrim < 0 THEN comp1 = (-b + sqrt(discrim))/(2*a) comp2 = (-b - sqrt(discrim))/(2*a) WRITE(*,*) "x1 = ", comp1 WRITE(*,*) "x2 = ", comp2 PROGRAM END quad_solv Thanks in advance!

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• J2ME web service client

  - by Wasim

  Hi all , I started to use the Netbeans 6.8 web service client wizard . I created a web service (.Net web service) witch return an object Data. The Data class , contains fileds with many types : int , string , double , Person object and array of Person object. I created the J2ME client code through the wizard and every thing seems ok . I see in the Netbeans project the service and the stub . When I try to call my web service method , say Data GetData() ; Then I have a problem with parsing the returned data from the web service and the client data object . As follows : After finishing to call the web service method , in the stub code : public Data helloWorld() throws java.rmi.RemoteException { Object inputObject[] = new Object[] { }; Operation op = Operation.newInstance( _qname_operation_HelloWorld, _type_HelloWorld, _type_HelloWorldResponse ); _prepOperation( op ); op.setProperty( Operation.SOAPACTION_URI_PROPERTY, "http://tempuri.org/HelloWorld" ); Object resultObj; try { resultObj = op.invoke( inputObject ); } catch( JAXRPCException e ) { Throwable cause = e.getLinkedCause(); if( cause instanceof java.rmi.RemoteException ) { throw (java.rmi.RemoteException) cause; } throw e; } return Data_fromObject((Object[])resultObj); } private static Data Data_fromObject( Object obj[] ) { if(obj == null) return null; Data result = new Data(); result.setIntData(((Integer )obj[0]).intValue()); result.setStringData((String )obj[1]); result.setDoubleData(((Double )obj[2]).doubleValue()); return result; } I debug the code and in Run time resultObj has one element witc is an array of the Data object , so in parsing the values in the Data_fromObject method it expect many cells like we see in the code obj[0] , obj[1] , obj [2] but in realtime it has obj[0][0] , obj[0][1] , obj[0][2] What can be the problem , how can check the code generation issue ? Is it a problem with the web service side. Please help. Thanks in advance...

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• Fuzzy Date algorithm in Objective-C

  - by Brock Woolf

  I would like to write a fuzzy date method for calculating dates in Objective-C for iPhone. There is a popular explanation here: http://stackoverflow.com/questions/11/how-do-i-calculate-relative-time However it contains missing arguments. How could this be used in Objective-C?. Thanks. const int SECOND = 1; const int MINUTE = 60 * SECOND; const int HOUR = 60 * MINUTE; const int DAY = 24 * HOUR; const int MONTH = 30 * DAY; if (delta < 1 * MINUTE) { return ts.Seconds == 1 ? "one second ago" : ts.Seconds + " seconds ago"; } if (delta < 2 * MINUTE) { return "a minute ago"; } if (delta < 45 * MINUTE) { return ts.Minutes + " minutes ago"; } if (delta < 90 * MINUTE) { return "an hour ago"; } if (delta < 24 * HOUR) { return ts.Hours + " hours ago"; } if (delta < 48 * HOUR) { return "yesterday"; } if (delta < 30 * DAY) { return ts.Days + " days ago"; } if (delta < 12 * MONTH) { int months = Convert.ToInt32(Math.Floor((double)ts.Days / 30)); return months <= 1 ? "one month ago" : months + " months ago"; } else { int years = Convert.ToInt32(Math.Floor((double)ts.Days / 365)); return years <= 1 ? "one year ago" : years + " years ago"; }

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• C# i am trying to make a zoom effect

  - by thrillercd

  Pls help! i am trying to make a zoom effect on a picturebox by mouse wheel.Everything is ok except that when i use mouse middle button to zoom in or zoom out it is ok but it does not zoom in or zoom out the point which the mouse cursor on.when i zoom in the point what i want it always slide .Pls help me to add a snippet code to make it right working. Here is my code. I am trying to make a zoom effect on a picturebox by mouse wheel. Everything is ok except that when I use mouse middle button to zoom in or zoom out it is ok but it does not zoom in or zoom out the point which the mouse cursor on. When I zoom in the point what I want it always slide. Please help me to add a snippet code to make it right working. Here is my code: int i = 5; int index = 10; private double[] zoomfactor = { .25, .33, .50, .66, .80, 1, 1.25, 1.5, 2.0, 2.5, 3.0 }; private void Zoom(int i) { double new_Zoom = zoomfactor[i]; imgBox.Width = Convert.ToInt32(imgBox.Image.Width * new_Zoom); imgBox.Height = Convert.ToInt32(imgBox.Image.Height * new_Zoom); } private void On_wheel(object sender, System.Windows.Forms.MouseEventArgs e) { i = i + e.Delta / 120; if (i < 0) { i = 0; } else { if (i <= index) i = i; else i = index; } Zoom(i); }

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• Parsing string, with Boost Spirit 2, to fill data in user defined struct

  - by Surya

  I'm using Boost.Spirit which was distributed with Boost-1.42.0 with VS2005. My problem is like this. I've this string which was delimted with commas. The first 3 fields of it are strings and rest are numbers. like this. String1,String2,String3,12.0,12.1,13.0,13.1,12.4 My rule is like this qi::rule<string::iterator, qi::skip_type> stringrule = *(char_ - ',') qi::rule<string::iterator, qi::skip_type> myrule= repeat(3)[*(char_ - ',') >> ','] >> (double_ % ',') ; I'm trying to store the data in a structure like this. struct MyStruct { vector<string> stringVector ; vector<double> doubleVector ; } ; MyStruct var ; I've wrapped it in BOOST_FUSION_ADAPT_STRUCTURE to use it with spirit. BOOST_FUSION_ADAPT_STRUCT (MyStruct, (vector<string>, stringVector) (vector<double>, doubleVector)) My parse function parses the line and returns true and after qi::phrase_parse (iterBegin, iterEnd, myrule, boost::spirit::ascii::space, var) ; I'm expecting var.stringVector and var.doubleVector are properly filled. but it is not the case. What is going wrong ? Thanks in advance, Surya

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• correct fisheye distortion

  - by Will

  I have some points that describe positions in a picture taken with a fisheye lens. I've found this description of how to generate a fisheye effect, but not how to reverse it. How do you calculate the radial distance from the centre to go from fisheye to rectilinear? My function stub looks like this: Point correct_fisheye(const Point& p,const Size& img) { // to polar const Point centre = {img.width/2,img.height/2}; const Point rel = {p.x-centre.x,p.y-centre.y}; const double theta = atan2(rel.y,rel.x); double R = sqrt((rel.x*rel.x)+(rel.y*rel.y)); // fisheye undistortion in here please //... change R ... // back to rectangular const Point ret = Point(centre.x+R*cos(theta),centre.y+R*sin(theta)); fprintf(stderr,"(%d,%d) in (%d,%d) = %f,%f = (%d,%d)\n",p.x,p.y,img.width,img.height,theta,R,ret.x,ret.y); return ret; }

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• reference from xaml to public class in .cs class file

  - by netmajor

  I have in my WPF project file RssInfo.cs in which I have public class public class DoubleRangeRule : ValidationRule { public double Min { get; set; } public double Max { get; set; } public override System.Windows.Controls.ValidationResult Validate(object value, CultureInfo cultureInfo) { ... } } and from my XAML code in WPF window class I neet to get to this DoubleRangeRule class.. //reference to my project, all my files are in the WpfCzytanieRSS namespace xmlns:valRule="clr-namespace:WpfCzytanieRSS;assembly=WpfCzytanieRSS" <TextBox Validation.ErrorTemplate="{StaticResource TextBoxErrorTemplate}" Name="tbTitle"> <TextBox.Text> <Binding Path="Nazwa" UpdateSourceTrigger="PropertyChanged"> <Binding.ValidationRules> <valRule:DoubleRangeRule Min="0.5" Max="10"/> //error place </Binding.ValidationRules> </Binding> </TextBox.Text> </TextBox> And i get two errors: Error 1 The tag 'DoubleRangeRule' does not exist in XML namespace 'clr-namespace:WpfCzytanieRSS;assembly=WpfCzytanieRSS'. Error 2 The type 'valRule:DoubleRangeRule' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built. Please help to get to class DoubleRangeRule ! :)

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• Bind members of different classes

  - by 7vies

  In a C++ program I have two classes (structs) like struct A { int x; double y; // other members }; struct B { int x; double y2; // other members }; I'd like to somehow "bind" the corresponding members, e.g. A::x to B::x and A::y to B::y2. By "bind" I mean ability to obtain a reference to the bound variable, for example given a member of class A I could assign it to the value of the corresponding B member. Once I have such bind, I'd like to build a bind table or something similar which I could iterate over. This would allow, for example, copying the corresponding fields from A a; to B b; like CopyBound(a, b, bind_table);, but probably also doing some other things not limited to Copy interface. The problem with this bind_table is that I want static typing and the bind_table would have to contain different types in this case. For example, a table of pointers to class members would contain &A::x and &A::y, but they are of different type, so I cannot just put them say into an array. Any ideas how this can be conveniently implemented, having as much compile-time type checking as possible?

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