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• ASP.NET MVC CHECKBOXES PROBLEM

  - by mazhar

  CONTROLLER public ActionResult Index() { GroupRepository grouprepository = new GroupRepository(); ViewData["Group"] = grouprepository.FindGroups(); return View(); } <%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" % <% foreach (Group i in ViewData["Group"] as List) { % " checked="checked" / <% } % The thing is that it is not able to find group id and displaying the following error. What is the solution? CS1061: 'System.Text.RegularExpressions.Group' does not contain a definition for 'int_GroupId' and no extension method 'int_GroupId' accepting a first argument of type 'System.Text.RegularExpressions.Group' could be found (are you missing a using directive or an assembly reference?)

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• Creating new Entities from Stored Procedure

  - by SK

  I have a stored procedure that retrieves existing rows from a table and also creates includes new rows that match the table definition and mapped entity (.net 3.5 entity framework). These new rows are not written to the database in the stored procedure. The stored procedure executes, but the new rows that were created will not load the navigation properties sucessfully i.e. the rows that do not actually exist in the database. e.g. database rows: key, data, FK 1, xxx, a 2, xxx, b returned rows from stored procedure: key, data, FK 1, xxx, a 2, xxx, b 3, yyy, a 4, yyy, b The entity will load FK entities a and b for rows 1 and 2, but for rows 3 and 4 the FK entity is null. Do I somehow need to add the new rows to the data context? or turn off tracking?

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• How can I execute a block of code exactly once in PHP?

  - by Jack

  I have one main.php file with a class definition. Other php files use this main.php file //main.php <?php class A{ } //I want to execute the following statements exactly once $a = new A(); /* Some code */ ?> I use main.php in other php files like //php1.php <?php require_once("main.php"); $b = new A(); /* Some code */ ?> Is there any statement in PHP like execute_once()? How do I solve this?

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• How to pass multiple params to function in python?

  - by user1322731

  I am implementing 8bit adder in python. Here is the adder function definition: def add8(a0,a1,a2,a3,a4,a5,a6,a7,b0,b1,b2,b3,b4,b5,b6,b7,c0): All function parameters are boolean. I have implemented function that converts int into binary: def intTObin8(num): bits = [False]*8 i = 7 while num >= 1: if num % 2 == 1: bits[i] = True else: bits[i] = False i = i - 1 num /= 2 print bits return [bits[x] for x in range(0,8)] I want this function to return 8 bits. And to use this two functions as follows: add8(intTObin8(1),intTObin8(1),0) So the question is: How to pass 8 parameters using one function?

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• c++ compilation error

  - by clamp

  hello, i got a compile error which i do not understand. i have a h/cpp file combination that does not contain a class but just defines some utility functions. when i try to use a struct that is defined in another class i get the error: error C2027: use of undefined type so, stripped down to the problem, the h file looks like this namespace A { void foo(B::C::SStruct const & Var); } the definition of SStruct is in a class which is in another h-file, that is of course included. namespace B { Class C { struct SStruct { }; } } what am i missing here? thanks!

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• Is there a method I can override on a JavaScript object to control what is displayed by console.log?

  - by agnoster

  I'm thinking in particular of Chrome, though Firebug would be interesting to. I've tried toString() and valueOf(), but neither of those seem to be used. Interestingly, if I take a function it'll display the function definition - but then if I add a toString() method it will show null! var a = function(){}; console.log(a); // output: function (){} a.toString = function(){ return 'a'; }; console.log(a); // output: null a.valueOf = function(){ return 'v'; }; console.log(a); // output: null Any ideas?

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• [PHP] Variables loaded from a separate script are not defined within functions

  - by Goro

  Hello, I use settings.php to store general settings for my application. When I load this settings file, I can use the variables defined in settings.php in the script itself, but not within any functions I define in it. For example, in my class definition, myclass.php: <?php $preIP = dirname(__FILE__); require_once( "preIP/settings.php" ); class MyClass { ... public function foo() { echo $variable_from_settings; } } The code in the function foo() will not work (the variable will not be defined). The settings.php file looks like this: $variable_from_settings = "bar"; Thanks,

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• C++ Vector of vectors

  - by xbonez

  I have a class header file called Grid.h that contains the following 2 private data object: vector<int> column; vector<vector<int>> row; And a public method whose prototype in Grid.h is such: int getElement (unsigned int& col, unsigned int& row); The definition of above mentioned function is defined as such in Grid.cpp: int getElement (unsigned int& col, unsigned int& row) { return row[row][col] ; } When I run the program, I get this error: error C2109: subscript requires array or pointer type Whats going wrong?

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• implementing runat in HtmlTextWriterAttribute

  - by user525116

  Hi dear friends, I have a custom asp.net control. public class Window : WebControl { protected override void RenderContents(HtmlTextWriter wr) { wr.AddAttribute("runat", "server",true); wr.AddAttribute("id", this.UniqueID, false); wr.RenderBeginTag(HtmlTextWriterTag.Div); wr.RenderEndTag(); wr.WriteLine(); base.RenderContents(wr); } } And this is my result after compile and use the control: <cc1:Window ID="Window1" runat="server" /> Use standard definition DIV with standard format: <div runat="server" id="aaaa"></div> After compile my web page to use this web custom control, this is render browser source of my web page: <span id="Window1"><div runat="server" id="Window1"></div></span> <div id="aaaa"></div>

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• Python profiler and CPU seconds

  - by dude

  Hey, I'm totally behind this topic. Yesterday I was doing profiling using Python profiler module for some script I'm working on, and the unit for time spent was a 'CPU second'. Can anyone remind me with the definition of it? For example for some profiling I got: 200.750 CPU seconds. What does that supposed to mean? At other case and for time consuming process I got: -347.977 CPU seconds, a negative number! Is there anyway I can convert that time, to calendar time? Cheers,

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• How should I make up for the lack of static initializers in PHP?

  - by kahoon

  I'm thinking about putting every class into a separate file and doing the static initialization outside of the class definition. The problem with this is the fact that the initialization will happen before the said class is actually needed (it will happen when the file which contains the class is included for the first time). It's a problem, because it may happen that the class won't be used at all, hence the initialization is unnecessary. And I think the practice of including the used files not in the beginning of your code is simply a dirty technique. If anybody has a viable solution to this problem, I would greatly appreciate it.

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• How does make_pair know the types of its args?

  - by bobobobo

  The definition for make_pair in the MSVC++ "utility" header is: template<class _Ty1, class _Ty2> inline pair<_Ty1, _Ty2> make_pair(_Ty1 _Val1, _Ty2 _Val2) { // return pair composed from arguments return (pair<_Ty1, _Ty2>(_Val1, _Val2)); } I use make_pair all the time though without putting the argument types in angle brackets: map<string,int> theMap ; theMap.insert( make_pair( "string", 5 ) ) ; Shouldn't I have to tell make_pair that the first argument is std::string and not char* ? How does it know?

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• Multiple inclusion of header file c++

  - by iSight

  Hi, I have a problem regarding multiple inclusion of header file in C++ code. say for example, i have three class X,Y,Z. X and Y are derived from Base class Z. And i want to create an instance of X in Y. The code will go like this. class Z{some code} class X:public Z{some code};//here #include header of class Z added class Y:public Z //here #include header of class Z added as well as of X class {private: X* mX;//instance of X some code}; So in this multiple definition of all methods of base class arises. how can i cope with this problem

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• Self Modifying Python? How can I redirect all print statements within a function without touching sys.stdout?

  - by Fake Name

  I have a situation where I am attempting to port some big, complex python routines to a threaded environment. I want to be able to, on a per-call basis, redirect the output from the function's print statement somewhere else (a logging.Logger to be specific). I really don't want to modify the source for the code I am compiling, because I need to maintain backwards compatibility with other software that calls these modules (which is single threaded, and captures output by simply grabbing everything written to sys.stdout). I know the best option is to do some rewriting, but I really don't have a choice here. Edit - Alternatively, is there any way I can override the local definition of print to point to a different function? I could then define the local print = system print unless overwritten by a kwarg, and would only involve modify a few lines at the beginning of each routine.

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• How to set AssemblyInfo.cs based on the tfs project build number?

  - by Ahok Rudraraju

  The project is hosted on a tfs server and I need to access the build number which I assume is automatically generated when ever you build a project. I need to retrieve that build number and display it on the web pages so that QAs and testing people know exactly which build they are working on. I found how to create customize build numbers in the following link: http://msdn.microsoft.com/en-us/library/aa395241(v=vs.100).aspx but it dose not solve my problem as I do not have access to the build definition file. I am looking for some kind of post deployment task which can access the build number or may be generate one and probably write it down to a file, from where I can read it. I don't know if that makes any sense as this is my first time working on .Net

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• Visual C++ CreateThread Parameter Problem

  - by Vanwaril

  I have a class that contains a function that calls create thread, and needs to pass itself (this) as a parameter: DWORD threadId; HANDLE h = CreateThread( NULL, 0, runThread, this, 0, &threadId); My runThread definition is as follows: DWORD WINAPI runThread(LPVOID args) { Obj *t = (Obj*)args; t->funct(); return 0; } Unfortunately, the object t that I get in runThread() gets garbage. My Obj class has a function pointer attribute. Could that be the problem? class Obj{ void(*funct)(); and in the constructor: Obj(void(*f)()) { funct = f; } where is my mistake? The function pointer, the createThread itself, or type-casting? I tried whatever I could think of.

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• What exactly is a variable in C++?

  - by FredOverflow

  The standard says A variable is introduced by the declaration of an object. The variable's name denotes the object. But what does this definition actually mean? Does a variable give a name to an object, i.e. are variables just a naming mechanism for otherwise anonymous objects? Or is a variable the name itself? Or is a variable a named object in the sense that every variable is also an object? Or is a variable just a "proxy" with a name that "delegates" all operations to the real object? To confuse things further, many C++ books seem to treat variables and objects as synonyms. What is your take on this?

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• D_WIN32_WINNT compiler warning with Boost

  - by bobber205

  Not sure what to make of this error. Added -D_WIN32_WINNT=0x0501 to Visual Studio's "Command Line" options under Project Properties but it says it doesn't recognize it and the warning still appears. I am also not sure how to add the Preprocessor Definition. :) Thanks for any help! 1Please define _WIN32_WINNT or _WIN32_WINDOWS appropriately. For example: 1- add -D_WIN32_WINNT=0x0501 to the compiler command line; or 1- add _WIN32_WINNT=0x0501 to your project's Preprocessor Definitions.

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• C# Why does calling an interface member from a class generate an error?

  - by Jack

  So I have an interface: interface IFoo { int Bar(); int this[int i] {get; set;} } And a class that derives from it class Foo : IFoo { public int IFoo.Bar() { //Implementation { public int IFoo.this[int i] { //Implementation } } Now, I try to do this: var fooey = new Foo(); int i = Fooey.Bar(); or this: int i = Fooey[4]; I would expect these to work properly. However, the compiler generates an error as if such members don't exist. Why is that? I am aware I can cast Foo as IFoo, but I am also aware that casting is costly to performance, which is often the reason to use interfaces in the first place. EDIT 1: These are the errors generated 'Foo' does not contain a definition for 'Bar' and no extension method 'Bar' accepting a first argument of type 'Foo' could be found (are you missing a using directive or an assembly reference?) "Cannot apply indexing to an expression of type 'Foo'"

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• Where does the 'method' implementation go? (I'm a newbie)

  - by Spokane-Dude

  I have this code: #import "SQLiteDB.h" @implementation SQLiteDB @synthesize db, dbPath, databaseKey; @end //-------------- check for database or create it ----------------| - (void)checkForDatabase { NSFileManager *filemanager = [NSFileManager defaultManager]; NSString *databasePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingString:@"/ppcipher.s3db"]; if(![filemanager fileExistsAtPath:databasePath]) { //Database doesn't exist yet, so we create it... NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/ppcipher.s3db"]; sqlite3 *db; if(sqlite3_open(databasePath, db) == SQLITE_OK) { } } } It's complaining that "method definition not in @implementation context". So where does it go? (I tried in the .h file, but still get the error)

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• Ojective C Class or struct?

  - by Scott Pendleton

  I have a class Song with properties Title, Key, Artist, etc. There are no methods. I loop through a database of song information and create a Song object for each, populating the properties, and then store the Song objects in an NSArray. Then I thought, why not just have a struct Song with all those same properties instead of a class Song. Doing so would eliminate the class files, the #import Song line in the using class's .m file, and the need to alloc, init, release. On the other hand, I'd have to put the struct definition in every class that might need it. (Unless there's some globally accessible location -- is there?) Also, can a struct be stored in an NSArray?

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• [Android] Returning to a ListView with a text filter

  - by sosiouxme

  I enabled text filtering on my ListView in the expected way; adding android:textFilterEnabled=”true” in resource definition and (as I'm using a SimpleCursorAdapter) setting a FilterQueryProvider that provides a filtered cursor like so: public Cursor runQuery(CharSequence constraint) { Cursor cur = mDba.fetchTrackers(mCurrentGroupId, constraint.toString()); startManagingCursor(cur); return cur; } My question is this: once the user selects a list item, goes off to another activity, and returns to this one, how can I control the state of the filter previously applied? What I'm seeing right now is that when I return to the activity, the cursor being used is the unfiltered one set on the filter at creation, but the filter text they typed is still shown (and typing keys causes the filter to be applied). What I'd like to do is either clear the filter, or keep the filtered cursor that the activity was left with.

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• Button height rendering inconsistency in Firefox - why are input elements taller?

  - by George Edison

  Consider the following two elements: <button type="submit" class="button">Test</button> <a href="#" class="button">Test 2</a> ...which use the following style definition: .button { background-color: yellow; color: white; border: 1px solid orange; display: inline-block; font-size: 24pt; padding: 2px 16px; text-decoration: none; } This produces two buttons beside each other with an equal height in Chrome. However, Firefox renders the button on the left with a height 1px greater than the button on the right (the <a>): (I've enlarged the image above by 2x.) What do I need to do to get the two buttons to have the same height? It seems like the font-size is causing the problem - but I need that attribute. Fiddle: http://jsfiddle.net/FfRPY/

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• Compare two integer arrays with same length

  - by meta

  [Description] Given two integer arrays with the same length. Design an algorithm which can judge whether they're the same, the definition of "same" is that, if these two arrays are in sorted order, the elements in corresponding position should be the same. [Example] <1 2 3 4> = <3 1 2 4> <1 2 3 4> != <3 4 1 1> [Limitation] The algorithm should require constant extra space, and O(n) running time.

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• Threads in JAVA

  - by theband

  I was today asked in an interview over the Thread concepts in JAVA? The Questions were... What is a thread? Why do we go for threading? A real time example over the threads. Can we create threads in Spring framework service class. Can flex call a thread? I did not answer any questions apart from definition of Thread, that too i just learnt from internet. Can anyone explain me clearly over this.

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