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  • when to make a method static

    - by Don
    Hi, I'd like to know how people decide whether to define a method as static. I'm aware that a method can only be defined as static if it doesn't require access to instance fields. So lets say we have a method that does not access instance fields, do you always define such a method as static, or only if you need to call it statically (without a reference to an instance). Perhaps another way of asking the same question, is whether you use static or non-static as the default? Thanks, Don

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  • How to call Java method from C++

    - by fhucho
    Hi, I am using JNI to call my C++ function from Java. One of the C++ function's arguments is jobject thiz (as far as I know, all JNI native functions have this argument). The function takes quite long to complete and I want to report progress back to the jobject thiz Java object, so that I can show the progress to the user. How can I call jobject's methods from C++?

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  • To delay javascript function call using jquery

    - by Mohan Ram
    CODES: $().ready(function(){ function sample() { alert("This is sample function"); } $("#button").click(function(){ t=setTimeout("sample()",2000); }); }); HTML: <input type="button" name="button" id="button" value="Call sample function with delay"> Once i click button sample function is not called with a delay of 2 seconds. I dont know whats wrong. Please notify me how to do this Question: To call javascript function using setTimeout via jquery

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  • Static method,new thread performance question

    - by ylazez
    Hey guys i just have two questions about two methods used in many controllers/servlets in my app: 1-what is the difference between calling a static method in a util class or a non static method (like methods dealing with dates i.e getting current time,converting between timezones), which is better ? 2-what is the difference between calling a method(contain too many logic like sending emails) in the controller directly or running this method in a different thread ?

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  • getting Url in the call back function of WebRequesting

    - by Stacker
    lets say i have a web request: WebRequest webRequest = WebRequest.Create(Url); webRequest.BeginGetResponse(this.RespCallback, webRequest); now is there is any way to do retierve the URL in private void RespCallback(IAsyncResult asynchronousResult) { // here } the idea is i want to provide a squence id in the url while doing webrequest and then reterive it on the call back and match it to know that this call back is from that request. any idea?

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  • How to call cgi script from ruby

    - by Maddy
    Hello, I've a remote cgi script hosted on Apache using SSL. It takes in two input variables a and b. I want to call call the cgi script with right input variables using ruby. Any clues would be appreciated.

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  • apex button to call a page in another application

    - by jaykio77
    I have a workspace with which I have 5 applications based on same schema. Now I want to have a main page from where I could call main pages of all these applications. I used this syntax to call home page in another application but to no avail f?p=4000:4150:&APP_SESSION. Where 4000:4150 are the values for the application and the page I want to display. Please let me know where am I making mistake.

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  • How to open safari, mail and doing call by html href link in UIWebView

    - by mobapps
    Hi, I need to do three task in UIWebView, Open safari, Open mail Place the call. I know that i can do it by using UIApplication's openURL, but i need to do by using UIWebView only, because my data is coming from server, and i need to do this task in that data, if data has www.link, email addres or call number. Does anyone knows that what is the actual idea. Thanks.

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  • How to make every Class Method call a specified method before execution?

    - by norm
    I want to make my Python Class behave in such a way that when any Class method is called a default method is executed first without explicitly specifying this in the called Class. An example may help :) Class animals: def _internalMethod(): self.respires = True def cat(): self._internalMethod() self.name = 'cat' def dog(): self._internalMethod() self.name = 'dog' I want _internalMethod() to be called automatically when any method is called from an instance of animals, rather than stating it explicitly in the def of each method. Is there an elegant way to do this? Cheers,

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  • Wake up thread blocked on accept() call

    - by selbie
    Sockets on Linux question I have a worker thread that is blocked on an accept() call. It simply waits for an incoming network connection, handles it, and then returns to listening for the next connection. When it is time for the program to exit, how do I signal this network worker thread (from the main thread) to return from the accept() call while still being able to gracefully exit its loop and handle it's cleanup code. Some things I tried: 1. pthread_kill to send a signal. Feels kludgy to do this, plus it doesn't reliably allow the thread to do it's shutdown logic. Also makes the program terminate as well. I'd like to avoid signals if at all possible. pthread_cancel. Same as above. It's a harsh kill on the thread. That, and the thread may be doing something else. Closing the listen socket from the main thread in order to make accept() abort. This doesn't reliably work. Some constraints: If the solution involves making the listen socket non-blocking, that is fine. But I don't want to accept a solution that involves the thread waking up via a select call every few seconds to check the exit condition. The thread condition to exit may not be tied to the process exiting. Essentially, the logic I am going for looks like this. void* WorkerThread(void* args) { DoSomeImportantInitialization(); // initialize listen socket and some thread specific stuff while (HasExitConditionBeenSet()==false) { listensize = sizeof(listenaddr); int sock = accept(listensocket, &listenaddr, &listensize); // check if exit condition has been set using thread safe semantics if (HasExitConditionBeenSet()) { break; } if (sock < 0) { printf("accept returned %d (errno==%d)\n", sock, errno); } else { HandleNewNetworkCondition(sock, &listenaddr); } } DoSomeImportantCleanup(); // close listen socket, close connections, cleanup etc.. return NULL; } void SignalHandler(int sig) { printf("Caught CTRL-C\n"); } void NotifyWorkerThreadToExit(pthread_t thread_handle) { // signal thread to exit } int main() { void* ptr_ret= NULL; pthread_t workerthread_handle = 0; pthread_create(&workerthread, NULL, WorkerThread, NULL); signal(SIGINT, SignalHandler); sleep((unsigned int)-1); // sleep until the user hits ctrl-c printf("Returned from sleep call...\n"); SetThreadExitCondition(); // sets global variable with barrier that worker thread checks on // this is the function I'm stalled on writing NotifyWorkerThreadToExit(workerthread_handle); // wait for thread to exit cleanly pthread_join(workerthread_handle, &ptr_ret); DoProcessCleanupStuff(); }

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  • C++ Why isn't call by reference needed for strcpy()

    - by Ribbs
    I have a homework assignment with a number of questions. One is asking why the strcpy() function doesn't need the call by reference operator for CStrings. I've looked through the book numerous times and I can't, for the life of me, find the answer. Can anyone help explain this to me? It is an array of sorts so I would think you would need the call by reference.

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  • Call c++ function pointer from c#

    - by Sam
    Is it possible to call a c(++) static function pointer like this typedef int (*MyCppFunc)(void* SomeObject); from c#? void CallFromCSharp(MyCppFunc funcptr, IntPtr param) { funcptr(param); } I need to be able to callback from c# into some old c++ classes. C++ is managed, but the classes are not ref classes (yet). So far I got no idea how to call a c++ function pointer from c#, is it possible?

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  • Why is `goog.Disposable.call(this);` necessary?

    - by David Faux
    In this snippet of Google Closure javascript code involving a constructor, why is goog.Disposable.call(this); necessary? Doesn't Foo already inherit from Disposable with goog.inherits(foo, goog.Disposable);? goog.provide('foo'); /** * @constructor */ foo = function(){ goog.Disposable.call(this); } goog.inherits(foo, goog.Disposable); foo.prototype.doSomething = function(){ ... } foo.prototype.disposeInternal = function(){ ... }

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  • Call C methods from C++/Java/C# code?

    - by Mohit Deshpande
    Many of today's programming languages are based on C; like C++, C#, Java, Objective-C. So could I call a C method from C++ code? Or call C from Java or C#? Or is this goal out of reach and unreasonable? Please include a quick code sample for my and everyone else's understanding.

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  • Call IBAction in other method

    - by user1628083
    I have an IBAction of SignIn and Method getData. When load it call SignIn into method Getdata in case I want auto sign in without click button Sign In. -(void)getData {       if ([_remCheckbox state] == NSOnState)     {         NSUserDefaults *store = [NSUserDefaults standardUserDefaults];                  NSString *un = [store objectForKey:@"usrname"];         NSString *pw = [store objectForKey:@"usrpwd"];                  _txtUsername.stringValue = un;         _txtPwd.stringValue = pw;                  //call event IBAction              }   } - (IBAction)buttonSignIn:(id)sender {     //Signin code suppose to work fine }

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  • Embedded linux call using system

    - by Gav
    I'm having a problem using system("command") call in C on an embedded system in linux. The call to the app works fine on the command line but when called in a compiled cgi script using the system command it is painfully slow. Any help appreciated?

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  • How to check whether an object has a specific method or not

    - by Ghommey
    Hey, I want to use a method of an object. Like $myObject->helloWorld(). However there are a couple of methods so I loop through an array of method names and call the method like this: my $methodName ="helloWorld"; $myObject->$methodNames; This works quite nice but some objects don't have all methods. How can I tell whether $myObject has a method called helloWorld or not?

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  • JSF 2.0 AJAX: jsf.ajax.request to call method not only rerender an area of page

    - by gerry
    Hi, I'm looking for a soultion of the following problem: _The is a list of links with different types of cars. _The user can click on each car in the list and a ajax request should be sent. _The response of the ajax request should be dependent on the id (of each car) and displayed in an panelGroup. So what I need is a possibility to call a method on the backing-bean. Additionally, this method should be called with a car id as its parameter. My code so far looks like: ... <ul> <ui:repeat value="#{carTree.getCars)}" var="car"> <h:outputScript name="jsf.js" library="javax.faces" target="head" /> <li onclick="showDetails(#{car.id});">#{car.name}</li> </ui:repeat> </ul> ... <h:panelGroup id="carDetails" layout="block" style="float:left;"> // need the details of each 'selected /clicked' car here </h:panelGroup> ... And the method in the backing bean should look like: public class CarTree { ... public String getCarDetails(int carid){ return "The car details for the car id "+carid+" are......"; } ... } I've no idea how to call a method by using the new JSF 2.0 AJAX functionality. Please, help me...

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  • What to call factory-like (java) methods used with immutable objects

    - by StaxMan
    When creating classes for "immutable objects" immutable meaning that state of instances can not be changed; all fields assigned in constructor) in Java (and similar languages), it is sometimes useful to still allow creation of modified instances. That is, using an instance as base, and creating a new instance that differs by just one property value; other values coming from the base instance. To give a simple example, one could have class like: public class Circle { final double x, y; // location final double radius; public Circle(double x, double y, double r) { this.x = x; this.y = y; this.r = r; } // method for creating a new instance, moved in x-axis by specified amount public Circle withOffset(double deltaX) { return new Circle(x+deltaX, y, radius); } } So: what should method "withOffset" be called? (note: NOT what its name ought to be -- but what is this class of methods called). Technically it is kind of a factory method, but somehow that does not seem quite right to me, since often factories are just given basic properties (and are either static methods, or are not members of the result type but factory type). So I am guessing there should be a better term for such methods. Since these methods can be used to implement "fluent interface", maybe they could be "fluent factory methods"? Better suggestions? EDIT: as suggested by one of answers, java.math.BigDecimal is a good example with its 'add', 'subtract' (etc) methods. Also: I noticed that there's this question (by Jon Skeet no less) that is sort of related (although it asks about specific name for method)

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  • Codeigniter - change url at method call

    - by NemoPS
    I was wondering if the following can be done in codeigniter. Let's assume I have a file, called Post.php, used to manage posts in an admin interface. It has several methods, such as index (lists all posts), add, update, delete... Now, I access the add method, so that the url becomes /posts/add And I add some data. I click "save" to add the new post. It calls the same method with an if statement like "if "this-input-post('addnew')"" is passed, call the model, add it to the database Here follows the problem: If everything worked fine, it goes to the index with the list of all posts, and displays a confirmation BUT No the url would still be posts/add, since I called the function like $this-index() after verifying data was added. I cannot redirect it to "posts/" since in that case no confirmation message would be shown! So my question is: can i call a method from anther one in the same class, and have the url set to that method (/posts/index instead of /posts/add)? It's kinda confusing, but i hope i gave you enough info to spot the problem Cheers!

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  • Batch break up after call other batch file

    - by Sven Arno Jopen
    i have the problem, that my batch process breaking up each time after call a other batch file. The batch files are used to run a make process out from IBM Rhapsody. There convert the call from Rhapsody to the Visual Studio tools. So nmake will be called from the batch after make different settings. The scripts aren’t written completely from me, I only adapt theme to run under both windows architecture versions, x86 and x64. The first script (vs2005_make.bat) will be called from Rhapsody and run to the “call” statement. The second script (Vcvars_VisualStudio2005.bat) runs to the end. But the first script isn’t resume working, at this point the process break up without a error message. I'm not very familiar with batch files, this is the first time I make more than simple console commands in a batch file. So I hope I have given all information’s which needed, otherwise ask me. Here the start script (vs2005_make.bat): :: parameter 1 - Makefile which should be used :: parameter 2 - The make target mark @echo off IF "%2"=="" set target=all IF "%2"=="all" set target=all IF "%2"=="build" set target=all IF "%2"=="rebuild" set target=clean all IF "%2"=="clean" set target=clean set RegQry="HKLM\Hardware\Description\System\CentralProcessor\0" REG.exe Query %RegQry% > checkOS.txt Find /i "x86" < CheckOS.txt > StringCheck.txt IF %ERRORLEVEL%==0 ( set arch=x86 ) ELSE ( set arch=x64 ) call "%ProgramFiles%\IBM\Rhapsody752\Share\etc\Vcvars_VisualStudio2005.bat" %arch% IF %ERRORLEVEL%==0 ( set makeflags= nmake /nologo /S /F %1 %target% ) del checkOS.txt del StringCheck.txt exit and here the called script (Vcvars_VisualStudio2005.bat): :: param 1 - Processor architecture @echo off ECHO param 1 = %1 IF %1==x86 ( SET ProgrammPath=%ProgramFiles% ) ELSE IF %1==x64 ( SET ProgrammPath=%ProgramFiles(x86)% ) ELSE ( ECHO Unknowen architectur EXIT /B 1 ) SET VSINSTALLDIR="%ProgrammPath%\Microsoft Visual Studio 8\Common7\IDE" SET VCINSTALLDIR="%ProgrammPath%\Microsoft Visual Studio 8" SET FrameworkDir=C:\WINDOWS\Microsoft.NET\Framework SET FrameworkVersion=v2.0.50727 SET FrameworkSDKDir="%ProgrammPath%\Microsoft Visual Studio 8\SDK\v2.0" rem Root of Visual Studio common files. IF %VSINSTALLDIR%=="" GOTO Usage IF %VCINSTALLDIR%=="" SET VCINSTALLDIR=%VSINSTALLDIR% rem rem Root of Visual Studio ide installed files. rem SET DevEnvDir=%VSINSTALLDIR% rem rem Root of Visual C++ installed files. rem SET MSVCDir=%VCINSTALLDIR%\VC SET PATH=%DevEnvDir%;%MSVCDir%\BIN;%VCINSTALLDIR%\Common7\Tools;%VCINSTALLDIR%Common7 \Tools\bin\prerelease;%VCINSTALLDIR%\Common7\Tools\bin;%FrameworkSDKDir%\bin;%FrameworkDir%\%FrameworkVersion%;%PATH%; SET INCLUDE=%MSVCDir%\ATLMFC\INCLUDE;%MSVCDir%\INCLUDE;%MSVCDir%\PlatformSDK\include\gl;%MSVCDir%\PlatformSDK\include;%FrameworkSDKDir%\include;%INCLUDE% SET LIB=%MSVCDir%\ATLMFC\LIB;%MSVCDir%\LIB;%MSVCDir%\PlatformSDK\lib;%FrameworkSDKDir%\lib;%LIB% GOTO end :Usage ECHO. VSINSTALLDIR variable is not set. ECHO. ECHO SYNTAX: %0 GOTO end :end Here the console output, what I not understand here and find very suspicious is that after the “IF %ERRORLEVEL%” Statement in the first script all will be put out regardless the echo is set to off… Executing: "C:\Programme\IBM\Rhapsody752\Share\etc\vs2005_make.bat" Simulation.mak build IF %ERRORLEVEL%==0 ( Mehr? set arch=x86 Mehr? ) ELSE ( Mehr? set arch=x64 Mehr? ) call "%ProgramFiles%\IBM\Rhapsody752\Share\etc\Vcvars_VisualStudio2005.bat" %arch% :: param 1 - Processor architecture @echo off ECHO param 1 = %1 param 1 = x86 IF %1==x86 ( Mehr? SET ProgrammPath=%ProgramFiles% Mehr? ) ELSE IF %1==x64 ( Mehr? SET ProgrammPath=%ProgramFiles(x86)% Mehr? ) ELSE ( Mehr? ECHO Unknowen architectur Mehr? EXIT /B 1 Mehr? ) SET VSINSTALLDIR="%ProgrammPath%\Microsoft Visual Studio 8\Common7\IDE" SET VCINSTALLDIR="%ProgrammPath%\Microsoft Visual Studio 8" SET FrameworkDir=C:\WINDOWS\Microsoft.NET\Framework SET FrameworkVersion=v2.0.50727 SET FrameworkSDKDir="%ProgrammPath%\Microsoft Visual Studio 8\SDK\v2.0" rem Root of Visual Studio common files. IF %VSINSTALLDIR%=="" GOTO Usage IF %VCINSTALLDIR%=="" SET VCINSTALLDIR=%VSINSTALLDIR% rem rem Root of Visual Studio ide installed files. rem SET DevEnvDir=%VSINSTALLDIR% rem rem Root of Visual C++ installed files. rem SET MSVCDir=%VCINSTALLDIR%\VC SET PATH=%DevEnvDir%;%MSVCDir%\BIN;%VCINSTALLDIR%\Common7\Tools;%VCINSTALLDIR%\Common7\Tools\bin\prerelease;%VCINSTALLDIR%\Common7\Tools\bin;%FrameworkSDKDir%\bin;%FrameworkDir%\%FrameworkVersion%;%PATH%; SET INCLUDE=%MSVCDir%\ATLMFC\INCLUDE;%MSVCDir%\INCLUDE;%MSVCDir%\PlatformSDK\include\gl;%MSVCDir%\PlatformSDK\include;%FrameworkSDKDir%\include;%INCLUDE% SET LIB=%MSVCDir%\ATLMFC\LIB;%MSVCDir%\LIB;%MSVCDir%\PlatformSDK\lib;%FrameworkSDKDir%\lib;%LIB% GOTO end Build Done I hope someone have an idea, i work now since two days and don't find the error... thanking you in anticipation. Note: The word “Mehr?” in the text output is german and means “more”. I don't know were it comes from and it is possible that it is a bad translation from the English output to german.

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  • [PHP] How to pass array as multiple parameters to function?

    - by vbklv
    I have a parameters array: $params[1] = 'param1'; $params[2] = 'param2'; $params[3] = 'param3'; ... $params[N] = 'paramN'; I have a caller to various functions: $method->$function( $params ); How can I parse the $params array, so multiple (and unlimited) parameters can be passed to any function: $method->$function( $param[1], $param[2], ..., $param[N] );

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