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• Use of Response.Flush before Response.End

  - by Ismail S

  When to use Response.Flush? Do I need to call it every time before I call Response.End?

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• Object relationships

  - by Hammerstein

  This stems from a recent couple of posts I've made on events and memory management in general. I'm making a new question as I don't think the software I'm using has anything to do with the overall problem and I'm trying to understand a little more about how to properly manage things. This is ASP.NET. I've been trying to understand the needs for Dispose/Finalize over the past few days and believe that I've got to a stage where I'm pretty happy with when I should/shouldn't implement the Dispose/Finalize. 'If I have members that implement IDisposable, put explicit calls to their dispose in my dispose method' seems to be my understanding. So, now I'm thinking maybe my understanding of object lifetimes and what holds on to what is just wrong! Rather than come up with some sample code that I think will illustrate my point, I'm going to describe as best I can actual code and see if someone can talk me through it. So, I have a repository class, in it I have a DataContext that I create when the repository is created. I implement IDisposable, and when my calling object is done, I call Dispose on my repository and explicitly call DataContext.Dispose( ). Now, one of the methods of this class creates and returns a list of objects that's handed back to my front end. Front End - Controller - Repository - Controller - Front End. (Using Redgate Memory Profiler, I take a snapshot of my software when the page is first loaded). My front end creates a controller object on page load and then makes a request to the repository sending back a list of items. When the page is finished loading, I call Dispose on the controller which in turn calls dispose on the context. In my mind, that should mean that my connection is closed and that I have no instances of my controller class. If I then refresh the page, it jumps to two 'Live' instances of the controller class. If I look at the object retention graph, the objects I created in my call to the list are being held onto ultimately by what looks like Linq. The controller/repository aside, if I create a list of objects somewhere, or I create an object and return it somewhere, am I safe to just assume that .NET will eventually come and clean things up for me or is there a best practice? The 'Live' instances suggest to me that these are still in memory and active objects, the fact that RMP apparently forces GC doesn't mean anything?

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• Calling function with 1 paremeter @ selector.

  - by Mr. McPepperNuts

  I want to call this guy -(void)addFavorite:(NSString *)favoriteToAdd at, @selector here action:@selector([addFavorite favoriteToAdd:@"string"])]; But I keep getting syntax error no matter which way I write it. Can someone point out the appropriate way to call this function? When it had no parameter and was "addFavorite," it worked fine.

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• How does polymorph ambiguity distinction work?

  - by Pentius

  Given I have a class with two constructors: public class TestClass { ObjectOne o1; ObjectTwo o2; public TestClass(ObjectOne o1) { // .. } public TestClass(ObjectTwo o2) { // .. } } What happens, if I call: new TestClass(null); How to determine the correct method to call? And who determines that? Are there differences between Java and other OOP languages?

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• how to close a sqlconnection in asp.net

  - by stighy

  Hi guys, i would like to know if there's something wrong in this asp.net code: mydatareader = mycmd.executeReader() if myDataReader.HasRow then // Do something end if myConnection.Close() If i avoid to call a "MyDataReader.Close()" does the connection close anyway ? I ask this because i'm assuming that if call a "MyConn.Close" it automatically close the associated datareader... or am i wrong ? Thanks

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• Best way to have common class shared by both C++ and Ruby?

  - by shuttle87

  I am currently working on a project where a team of us are designing a game, all of us are proficient in ruby and some (but not all) of us are proficient in c++. Initially we made the backend in ruby but we ported it to c++ for more speed. The c++ port of the backend has exactly the same features and algorithms as the original ruby code. However we still have a bunch of code in ruby that does useful things but we want it to now get the data from the c++ classes. Our first thought was that we could save some of the data structures in something like XML or redis and call that, but some of the developers don't like that idea. We don't need anything particularly complex data structures to be passed between the different parts of the code, just tuples, strings and ints. Is there any way of integrating the ruby code so that it can call the c++ stuff natively? Will we need to embed code? Will we have to make a ruby extension? If so are there any good resources/tutorials you could suggest? For example say we have this code in the c++ backend: class The_game{ private: bool printinfo; //print the player diagnostic info at the beginning if true int numplayers; std::vector<Player*> players; string current_action; int action_is_on; // the index of the player in the players array that the action is now on //more code here public: Table(std::vector<Player *> in_players, std::vector<Statistics *> player_stats ,const int in_numplayers); ~Table(); void play_game(); History actions_history; }; class History{ private: int action_sequence_number; std::vector<Action*> hand_actions; public: void print_history(); void add_action(Action* the_action_to_be_added); int get_action_sequence_number(){ return action_sequence_number;} bool history_actions_are_equal(); int last_action_size(int street,int number_of_actions_ago); History(); ~History(); }; Is there any way to natively call something in the actions_history via The_game object in ruby? (The objects in the original ruby code all had the same names and functionality) By this I mean: class MyRubyClass def method1(arg1) puts arg1 self.f() # ... but still available puts cpp_method.the_current_game.actions_history.get_action_sequence_number() end # Constructor: def initialize(arg) puts "In constructor with arg #{arg}" #get the c++ object here and call it cpp_method end end Is this possible? Any advice or suggestions are appreciated.

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• mfc, how can i make a proccess in an OnLButtonDown() event happen again and again untill i live the

  - by Erez

  What happen untill now is this... Any line happens once, and if i use a while(1) or while (nFlags == MK_LBUTTON) its working as it should but i get a crash... The other problem, or mabye the same one is the delay if i will be able to do it, mabye using while() with Timer()????? I was thinking about Timer() to recall the function with delay but i can't call OnLButtonDown() becouse as i understand it only a messege can call it with the arguments..... 10x

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• Java MessageDigest result does not stay constant

  - by user344146

  I've got this function for encrypting passwords in Java, but somehow when I call MessageDigest, it returns a different result every time even though I call it with the same password. I wonder if I am initializing it wrong somehow. public String encrypt (String password) { MessageDigest md = MessageDigest.getInstance("SHA-1"); md.reset(); md.update(password.getBytes(Charset.forName("utf-8")),0,password.length()); String res = md.digest().toString(); }

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• How to do method chaining in Java? o.m1().m2().m3().m4()

  - by Pentium10

  Maybe the title might be better, if someone knows a better one, please edit. I've seen in many Java code notation that after a method we call another, here is an example. Toast.makeText(text).setGravity(Gravity.TOP, 0, 0).setView(layout).show(); As you see after calling makeText on the return we call setGravity and so far. How can I do this with my own classes? Do I have to do anything special?

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• Calling another Seam permission resolver from Drools

  - by ciaron

  I'm just discovering Drools with Seam, and I would like to call my PersistentPermissionResolver directly from the Drools code. Do you know if there is a way to achieve that and is that a good idea? I would also like to call the hasPermission method from my xxx.page.xml as follows: <restrict>#{s:hasPermission('menu_32', 'view')}</restrict>

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• Vfr/reader when to read a page

  - by juliet

  I downloaded vfr reader soure code on github. I am reading it, I found when need show a page of PDF, it will call showdocument method in showdocument method, it will new a readercontentview in readercontentview it will new a readercontentpage which has a citiedlayer delegate method called drawlayer:incontext I don't understand when and how to call this method, because there is no update for the readercontentview.

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• Why is the content of slice not changed in GO?

  - by Kid

  I thought that in GO language, slices are passed by reference. But why the following code doesn't change the content of slice c? Am I missing something? Thank you. package main import ( "fmt" ) func call(c []int) { c = append(c, 1) fmt.Println(c) } func main() { c := make([]int, 1, 5) fmt.Println(c) call(c) fmt.Println(c) } The result printed is: [0] [0 1] [0] while I was expecting [0] [0 1] [0 1]

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• Change in pitch of voice

  - by user340007

  Hi, I am creating an iPhone application in which when I make a call to anyone I should be able to change the pitch of my call voice in real time. So for that which framework or any third party library should I use? Thanks, Sunil.

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• How optimize queries with fully qualified names in t-sql?

  - by tomaszs

  Whe I call: select * from Database.dbo.Table where NAME = 'cat' It takes: 200 ms And when I change database to Database in Management Studio and call it without fully qualified name it's much faster: select * from Table where NAME = 'cat' It takes: 17 ms Is there any way to make fully qualified queries faster without changing database?

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• turn on bluetooth in pocket pc VS-c++

  - by baash05

  I'm attempting to turn on the bluetooth network of a Janam (wince5.0) I understand it involves ndisuio, but I'm not sure how to invoke it. I assume it will involve the use of a standard DLL or api call, how can I find out what that call would be?

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• How do I understand the 3 lines batch script?

  - by Runner

  ECHO @ECHO OFF ^& (IF EXIST "%%~dp0%~n1.swf" (DEL "%%~dp0%~n1.swf")) ^& %mxmlcPath% %opts% -file-specs "%%~dp0%~nx1" ^& (IF EXIST "%%~dp0%~n1.swf" (CALL "%%~dp0%~n1.swf") ELSE (PAUSE)) > "%~dpn1.bat" REM Immediately execute the generated bat @ECHO on CALL "%~dpn1.bat" It's really a mess for me(like ECHO @ECHO OFF,what's that intended for?), can someone elaborate it?

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• C++: Why does gcc prefer non-const over const when accessing operator[]?

  - by JonasW

  This question might be more appropriately asked regarding C++ in general, but as I am using gcc on linux that's the context. Consider the following program: #include <iostream> #include <map> #include <string> using namespace std; template <typename TKey, typename TValue> class Dictionary{ public: map<TKey, TValue> internal; TValue & operator[](TKey const & key) { cout << "operator[] with key " << key << " called " << endl; return internal[key]; } TValue const & operator[](TKey const & key) const { cout << "operator[] const with key " << key << " called " << endl; return internal.at(key); } }; int main(int argc, char* argv[]) { Dictionary<string, string> dict; dict["1"] = "one"; cout << "first one: " << dict["1"] << endl; return 0; } When executing the program, the output is: operator[] with key 1 called operator[] with key 1 called first one: one What I would like is to have the compiler choose the operator[]const method instead in the second call. The reason is that without having used dict["1"] before, the call to operator[] causes the internal map to create the data that does not exist, even if the only thing I wanted was to do some debugging output, which of course is a fatal application error. The behaviour I am looking for would be something like the C# index operator which has a get and a set operation and where you could throw an exception if the getter tries to access something that doesn't exist: class MyDictionary<TKey, TVal> { private Dictionary<TKey, TVal> dict = new Dictionary<TKey, TVal>(); public TVal this[TKey idx] { get { if(!dict.ContainsKey(idx)) throw KeyNotFoundException("..."); return dict[idx]; } set { dict[idx] = value; } } } Thus, I wonder why the gcc prefers the non-const call over the const call when non-const access is not required.

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• 'Method name must be a string' when using __call method in php

  - by Saif Bechan

  I am using the magic __call method in PHP. Sometimes the function I call is a number. For example the class name is example, then sometimes I want to call example::32 Is this possible or should I look at another alternative.

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• [jQuery] Several buttons on one form calling same function

  - by user198003

  hi all, trying to develop web form using jquery. all i need is to have several (don't know how many) buttons on one form. all of those buttons have to call one same function, and to pass one parameter to that function. that function have to do some post method, but i can handle it. so, my main problem is that i don't know how to develop JS that will call specific jquery function. can you help me with this?

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• Problem with using the XPATH functions

  - by Alex

  I've got a problem with using the XPATH functions. When I try to call some functions like lower-case or upper-case etc,they are not executed and I can't figure the problem out. I included the namespace xmlns:fn="http://www.w3.org/2005/xpath-functions" at the top of my XSL stylesheet and use fn namespace to call these functions but anyway nothing is working. Can anyone explain the reason and what I should do in order to be able to use the following functions? Cheers

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• Adding procedural C openGL functions to an iPhone project

  - by user309595

  I want to add a few drawing functions to an iPhone project for drawing things. Something like drawTile(x,y,len,wid); which would call openGL to draw a box somewhere. I should just be able to write a procedural C file to do this but the openGL libraries are objective C and I'm getting weird errors. Do I have to make a class for all of my drawing commands and call class methods?

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• Include code file into C#? Create library for others?

  - by Tomas

  Hi, I would like to know how can I embedd a code source file (if possible), something like that: class X { include "ClassXsource" } My second question - Can I build DLL or something like that for my colleagues to use? I need them to be able to call methods from my "part" but do not modify or view their content. Basically just use namespace "MyNamespace" and call its methods, but I have never done anything like that. Thanks

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• why we can't initialize a servlet using constructor itself?

  - by Reddy

  Why do we have to override init() method in Servlets while we can do the initialization in the constructor and have web container call the constructor passing ServletConfig reference to servlet while calling constructor? Ofcourse container has to use reflection for this but container has to use reflection anyway to call a simple no-arg constructor

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• Java: Using Dynamically loaded classes

  - by Snigger

  Hi I'm new to java. I'm trying to use some dynamically loaded classes in my application. The application doesn't know classes , Just it try to load a class by name that its name came from input. It doesn't know class (So I can't use casting) but just needs to call some methods of that class (every class should have that methods). I thought about interfaces but I don't know how. How can I call those methods? Thanks

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• Undefined function in php

  - by Bidyut

  I wrote three methods in a class and one is calling another, but when I call the function outside through the object, it is showing an undefined function error for the second function. Here's my code: function resize_image(){ } function image_resize(){ $a = resize_image(); } When I run this, it shows resize_image() as undefined. Here's the error: Fatal error: Call to undefined function resize_image() in /home/vacayge/public_html/Major/Alpha1/classes/cUserImages.php on line 2090

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