Search Results

Search found 12194 results on 488 pages for 'reference counting'.

Page 337/488 | < Previous Page | 333 334 335 336 337 338 339 340 341 342 343 344  | Next Page >

• SQL Server 2005 Reporting Services: How to count rows that are not null? Any hints for calculating t

  - by user329266

  Is there a way to count only records that are not null; similar to "COUNTA" in Excel? I would think this would be very simple process, but nothing I have tried has worked. If necessary, I can try to work this into my SQL query, but the query is already incredibly complicated. Also, I've found very little documentation for how to calculate report totals, and how to total from groups. Would anyone have any recommendations on what to use as a reference?

  Read the article

• referencing struct fields in c with square brackets and an index instead of . and ->?

  - by lsiebert

  Assuming I have a structure such as: typedef struct { char * string1; char * string2; } TWO_WORDS; such that all the fields are of the same type, and my main has TWO_WORDS tw; can I reference string1 with tw[0] and string2 with two[1]? If so: is this part of the c standard? do i have to cast the struct to an array first? what about fields which are different sizes in memory what about fields which are different types but the same size? can you do pointer arithmetic within a structure? -

  Read the article

• How can i add column name in list generic?

  - by Phsika

  class MyExcelSheets { public List MyColumnNames { get; set; } } how can i add Excel data's column name in "List MyColumnNames ". it returns to me Object reference not set to an instance of an object. i want to use above class in: myexcelSheet = new MyExcelSheets(); myexcelSheet.MyColumnNames = new MyExcelSheets().MyColumnNames; foreach (DataColumn col in dTable.Columns) myexcelSheet.MyColumnNames.Add(col.ColumnName.ToString()); How can i solve it? Error: NullReferenceException

  Read the article

• C++ syntax of constructors " 'Object1 a (1, Object1(2))''

  - by osgx

  Hello I have a such syntax in program class Object1 : BaseClass { BaseClass *link; int i; public: Object1(int a){i=a;} Object1(int a, Object1 /*place1*/ o) {i=a; link= &o;} }; int main(){ Object1 a(1, /*place2*/ Object1(2)); ... } What do I need in place1? I want to save a link (pointer) to the second object in the first object. Should I use in place1 reference "&"? What type will have "Object1(2)" in place2? Is it a constructor of the anonymous object? Will it have a "auto" storage type?

  Read the article

• Button stops working after loading div via ajax

  - by asovgir

  I have two divs on the page: main div and secondary, which loads a separate html page using ajax. All the links within the main div trigerred by a click event continue to work correctly and reference the appropriate content, but none of the jquery outside this div works (such as the navigation). Here's my jQuery: var url; $('.main a').live('click',function() { url = $(this).attr('href'); $('.secondary').load(url); return false; }); Can anyone help me why this isn't working? I think I am supposed to trigger a callback event but I am not sure how to do so. I know this question has been asked multiple times already (usually suggesting to use .live() or .on()), but none of those solutions seemed to work for me.

  Read the article

• c# project cannot find c++ .dll?

  - by flavour404

  I have a working c++ dll that works in one c# project that I am calling via the interop service. I have created another c# project and am trying to call the same .dll but keep getting a generic error message stating that the .dll cannot be found, both project are .net 2.0. What folder, and where do I specify in the project, should I put the .dll file in so that the project can find it? Think of it as a reminder for me... In the previous project I did not have a reference to it, I just had it in the /bin folder and doing the same thing for this project does not work. Thanks R.

  Read the article

• Set a tab page on lload event of a form

  - by tanu

  i have a form with many tabs on it. I want to set a specific tab page to show on load of the form everytime i load the form I used TabPageControl1.SelectedTab=MyTabPage; but the value of selectedtab is null. It is throwing an exception that reference not set to an object. private void PreferencesForm_Load(object sender, EventArgs e) { this.cbxCustomDataType.DrawMode = DrawMode.OwnerDrawFixed; this.cbxCustomDataType.DrawItem += new DrawItemEventHandler(cbxCustomDataType_DrawItem); this.cbxColumnDataType.DrawMode = DrawMode.OwnerDrawFixed; this.cbxColumnDataType.DrawItem += new DrawItemEventHandler(cbxColumnDataType_DrawItem); GetProjectDetails(); this.preferencesTabControl.SelectedTab= tpCompareUpdate; }

  Read the article

• Removing exception

  - by Nikhil K

  I have used this code for extracting urls from web page.But in the line of 'foreach' it is showing Object reference not set to an instance of an object exception. What is the problem? how can i correct that? WebClient client = new WebClient(); string url = "http://www.google.co.in/search?hl=en&q=java&start=10&sa=N"; string source = client.DownloadString(url); HtmlDocument doc = new HtmlDocument(); doc.LoadHtml(source); foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//a[@href and @rel='nofollow']")) { Console.WriteLine(link.Attributes["href"].Value); }

  Read the article

• is it possible to create a multi-project template that references n number of existing projects and

  - by jcollum

  The situation: I need to create about 40+ solutions that all reference 3 projects and have one project that is unique to each one. I'd like to create a multi-project template that does this, but from what I've read it looks like it's very difficult or impossible (related SO question, but doesn't answer). I want my solution to look like this (names changed of course): These three are used by all solutions created under this "family": MyCompany.Extensions MyCompany.MyProject.Tests.Shared MyCompany.MyProject.Scripts This one is the one that makes the solution unique, 123, 124, 125 etc: MyCompany.MyProject.Tests.Unit123 Is it possible to set up a multi-project template that will generate this structure? References: MSDN Create Multi Project Templates

  Read the article

• Lambda expression will not compile

  - by John Soer

  I am very confused. I have this lamba expression: tvPatientPrecriptionsEntities.Sort((p1, p2) => p1.MedicationStartDate .Value .CompareTo(p2.MedicationStartDate.Value)); Visual Studio will not compile it and complains about syntax. I converted the lamba expression to an anonymous delegate as so: tvPatientPrecriptionsEntities.Sort( delegate(PatientPrecriptionsEntity p1, PatientPrecriptionsEntity p2) { return p1.MedicationStartDate .Value .CompareTo(p2.MedicationStartDate.Value); }); and it works fine. The project uses .NET 3.5 and I have a reference to System.Linq.

  Read the article

• Difference between jQuery click, bind, live, delegate & trigger functions( with example)

  - by I Like PHP

  Hello All, I know there are a lot of questions similar to this, but I want to know clear difference between all of these jQuery functions together on this page with an example, so that it will be very helpful for me to understand the mechanism of all of these functions. I have also read the reference on jQuery main site, but there is no comparison between these: $().click(fn) $().bind('click',fn) $().live('click',fn) $().delegate('td','click',fn) $().trigger('click') // UPDATED Please do not refer any link if there is a part of question belong to that. Please describe how all four function exactly works in different manner, and which should be preferred in which situation. Note: If there are any other function with same functionality/mechanism , then please share. Thanks a lot. Update i have also seen $(trigger) function? is this works similar to above four function ?

  Read the article

• How do I get back results running a VB Script from C#?

  - by Tom

  I want to be able to call VB scripts from C#, which is easy enough, but I need to be able to get back the results from these scripts at times. Should I use the method referenced with something to read back, or should I use a different method? I've found a method to getting data back from powershell scripts using Runspaces and Pipelines, but I don't know enough about this technology to know if it will work with VB scripts as well. Ideally, I'd like to do something similar to the powershell method where I can just pass in the contents of the script without needing to reference an external file and get back the results. Can anyone tell me how to do this? Thanks.

  Read the article

• g++ library search failure

  - by Frederick

  I have a directory structure as below: / | +--- /lib | libsomething.a | libsomething.so | +----/obj anObjFile.o When I run the following command from within the obj directory: g++ -L../lib -lsomething anObjFile.o I get undefined reference errors. Apparently gcc is failing to locate libsomething.a. But now if I delete libsomething.so and then rerun the command, linking succeeds. As per gcc documentation -lsomething should expand to libsomething.a. Then why is presence of libsomething.so causing the library search to fail? Also, how can I resolve this problem? I'm on Linux Mint 12 with gcc version 4.6.1.

  Read the article

• Unit testing of static library that involves NSDocumentDirectory and other iOS App specific calls.

  - by Shiun

  Hi, I'm attempting to run unit tests for a static library that attempts to create/write/read a file in the document directory. Since this is a static library and not an application for the iOS, attempts to reference the NSDocumentDirectory is returning me directory for the form "/Users//Library/Application Support/iPhone Simulator/Documents" This directory does not exist. When attempting to access a directory from an actual application, the NSDocumentDirectory returns something of the form: "/Users//Library/Application Support/iPhone Simulator/4.2/FEDBEF5F-1326-4383-A087-CDA1B865E61A/Documents" (Please note the simulator version as well as application ID as part of the path) How can I overcome this shortcoming in the unit test framework for static libraries that implement tests that require iOS app specific calls? Thanks in advance.

  Read the article

• using jquery $.post() for returning multiple values

  - by Aninemity

  Hi all I am trying to use a $.post() in the following way: $.post("file.php", { file_id: $(this).val()}, function(data){...} The file.php then does a database query and returns an array with a title, description and image reference. What I want to do then is be able to update the .val() for form fields for each. I understand how to do this on a single variable, it would just be the following: $.post("file.php", { file_id: $(this).val()}, function(data){ $('#title').val(data); } But, how do I get the data returned to be recognizable in jquery as either separate variables or as an array? Thanks in advance

  Read the article

• How can I loop through all the open instances of a particular form?

  - by raz3r

  I need to update a ListBox of a Form2 created dinamically. Let's say that in the event where I have to update this ListBox (in Form1 of course) I don't have a reference of this Form2 so I can't call the UpdateList method (and no, I can't make it static). I don't even know if there is a Form2 opened, it could be or not. What do you suggest? Is there a way to loop through all the open istances of Form2? Code Sample: //Form1 public void event() { //UPDATE FORM2 LISTBOX } //SOMEWHERE IN FORM1 Form2 runTime = new Form2(); //Form2 public void UpdateList() { //UPDATE LISTBOX }

  Read the article

• Python 2.7 creating a multidimensional list

  - by poop

  I don't know why I am having so much trouble creating a 3 dimensional list. I need the program to create an empty n by n list. So for n = 4: x = [[[],[],[],[]],[[],[],[],[]],[[],[],[],[]],[[],[],[],[]]] I've tried using: y = [n*[n*[]]] y = [[[]]* n for i in range(n)] Which both appear to be creating copies of a reference. I've also tried naieve application of the list builder with little success: y = [[[]* n for i in range(n)]* n for i in range(n)] y = [[[]* n for i in range(1)]* n for i in range(n)] I've also tried building up the array iteratively using loops, with no success. In my rapid flurry of attempts to not post something stupidly easy to SO, I came upon a solution: y = [] for i in range(0,n): y.append([[]*n for i in range(n)]) Is there an easier/ more intuitive way of doing this?

  Read the article

• What is the time complexity of LinkedList.getLast() in Java?

  - by i.

  I have a private LinkedList in a Java class & will frequently need to retrieve the last element in the list. The lists need to scale, so I'm trying to decide whether I need to keep a reference to the last element when I make changes (to achieve O(1)) or if the LinkedList class does that already with the getLast() call. What is the big-O cost of LinkedList.getLast() and is it documented? (i.e. can I rely on this answer or should I make no assumptions & cache it even if it's O(1)?)

  Read the article

• Android-SQLite: How to Count specific value from Column?

  - by sanpatil

  I have two table (TABLE_EXAM,TABLE_RESULT). Here is value of my TABLE_RESULT. result_id exam_id question_id correct_answer 1 2 4 y 2 2 5 y 3 2 6 n 4 2 7 y I need to count how many correct_answer='y' where exam_id=2. I try following code but it return 0. public int calculateResult(int examId,String confirmAnswer) { int correctAnswer=0; try { SQLiteDatabase db=this.getWritableDatabase(); String selectQuery=("select count(correctAnswer) from result where exam_id ='" + examId + "' and correctAnswer ='" + 'y' +"'" ); // String selectQuery=("SELECT COUNT(*)FROM result WHERE exam_id ='" + examId + "' and correctAnswer ='" + confirmAnswer +"'" ); Cursor cursor = db.rawQuery(selectQuery, null); if(cursor.moveToLast()) { correctAnswer=cursor.getInt(3); } } catch(Exception e) { e.printStackTrace(); } return correctAnswer; } In variable confirm_answer i pass "y". Give me some hint or reference. Any help is appreciated. Thanks in Advance

  Read the article

• .Net Compact Framework - is there any way in the SerialPort class to set the RTS control to TOGGLE ?

  - by egapotz

  Hi, I found very annoying the fact that the SerialPort class in the .NET Framework doesn't allow to set the rts control to TOGGLE. There is a property called RTSEnable that lets me control directly the status of the RTS signal, but in a Compact Framework app there is not much precision to make it work well. Another solution can be to write a class that calls unmanaged APIs and set the rts control via the DCB structure, but I don't like it since I am using some external libraries that need to reference to a SerialPort instance. Have you any other idea ? Thanks !

  Read the article

• [GCC, linking] How to link app with static library + why this is not working

  - by user278799

  I have a problem. I wrote example code and I want to build it without the error: main.cpp.text+0x5): undefined reference to `test()' Library test1.c #include <stdlib.h> void test() { puts("Dziala"); } test1.h #ifndef TEST1_H #define TEST1_H extern void test(); #endif makefile all: gcc -c ./src/test1.c -o ./lib/test1.o ar rcs ./lib/libtest1.a ./lib/test1.o Program main.cpp #include <test1.h> int main() { test(); return 0; } makefile all: g++ -static -I../test1/include -L../test1/lib ./src/main.cpp -o ./build/MyApp -ltest1 What am I doing wrong?

  Read the article

• Why does my WCF service return and ARRAY instead of a List <T> ?

  - by user193189

  In the web servce I say public List<Customer> GetCustomers() { PR1Entities dc = new PR1Entities(); var q = (from x in dc.Customers select x).ToList(); return q; } (customer is a entity object) Then I generate the proxy when I add the service.. and in the reference.cd it say public wcf1.ServiceReference1.Customer[] GetCustomers() { return base.Channel.GetCustomers(); } WHY IS IT AN ARRAY? I asked for a List. help.

  Read the article

• 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'"

  Read the article

• Which class will be instanciated

  - by Michael

  Say I have 2 subclasses from UIViewController, class A and class B. In Main nib file an object is representing class A and it is set to load file from Secondary nib file. The owner of Secondary nib is of class B. The question is - from which class an object in Main nib file will be instanciated once the nib files unarchived in the memory? The reason this question arised is that I have to take care myself if such reference to external NIB file present, to ensure that the first nib's object and second nib's owner is same. Please correct me if my statement is wrong.

  Read the article

• Purpose of front() and back() in assigning values in a Queue? (C++)

  - by kevin

  I have declared: queue<int, list<int> > Q After a series of calls: Q.push(37); Q.pop(); Q.push(19); Q.push(3); Q.push(13); Q.front(); Q.push(22); Q.push(8); Q.back(); I get: 19-3-13-22-8-NULL What I don't get is what the calls to Q.front() and Q.back() do. From what I understand, they return a reference to the first or last elements respectively, but I dont see how my list would be any different had those calls not been made. Do they have any effect? Sorry if this seems trivial, but I'm trying to figure out of those calls have a purpose, or of my professor is just trying to screw with me.

  Read the article

< Previous Page | 333 334 335 336 337 338 339 340 341 342 343 344  | Next Page >