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  • Objective-c when to release objects

    - by Chris
    -(IBAction)registerUpdate:(id)sender { HTTPRequest* request = [[HTTPRequest alloc] initWithUrl:@"http://www.yahoo.com" delegate:self]; [request doRequest]; } The HTTPRequest makes an asynchronous request and calls the onHTTPResponse method in the current class. My question is do I have to release request? My guess is that I'm supposed to make it an instance variable? [NSString stringWithFormat:@"Data received: %@", [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]]; How would I release that string object, or should I assign it to a variable?

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  • NSMutableArray of Objects misbehaves ...

    - by iFloh
    I hope someone understands what happens to my NSMutableArray. I read records a, b, c, d from a database, load the fields into an object an add the object to an array. To do this I read the records into an instance of that object (tmpEvent) and add the Object to the target array (NSMutableArray myArray). the code looks like: for (condition) { tmpEvent.field1 = [NSString stringWithUTF8String:(char*)sqlite3_column_text(stmt, 0)]; tmpEvent.field2 = [NSString stringWithUTF8String:(char*)sqlite3_column_text(stmt, 1)]; tmpEvent.field3 = [NSString stringWithUTF8String:(char*)sqlite3_column_text(stmt, 2)]; NSLog(@"myArray: adding %@", tmpEvent.field1); [myArray addObject:tmpEvent]; } The NSLog shows myArray: adding a myArray: adding b myArray: adding c myArray: adding d Subsequent I enumerate the array (this can be in the same or a different method): for (myObject *records in myArray) { NSLog(@"iEvents value %@", records.field1); } The NSLog now shows: myArray value d myArray value d myArray value d myArray value d a mystery .... ??? any thoughts?

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  • SQL Syntax for testing objects before creating views & functions

    - by Scott Weinstein
    I'm trying to figure out the syntax for creating a view (or function) but only if a dependent CLR assembly exits. I've tried both IF EXISTS (SELECT name FROM sys.assemblies WHERE name = 'MyCLRAssembly') begin create view dbo.MyView as select GETDATE() as C1 end and IF EXISTS (SELECT name FROM sys.assemblies WHERE name = 'MyCLRAssembly') create view dbo.MyView as select GETDATE() as C1 go Neither work. I get Msg 156, Level 15, State 1, Line 2 Incorrect syntax near the keyword 'view'. How can this be done?

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  • how to merge two ordered list of objects?

    - by bhavna raghuvanshi
    public class ListMerge { public static void main( String[] args) { Scanner input = new Scanner(System.in); System.out.println ("Input length of arraylist 1:"); int n = input.nextInt(); ArrayList x = new ArrayList(); ArrayList y = new ArrayList(); for (int i = 0; i < n; i++) { System.out.println ("Input x[ " + i +"] :" ); x.add(new Integer(i)); } System.out.println ("Input length of arraylist 2:"); int m = input.nextInt(); for (int i = 0; i < m; i++) { System.out.println ("Input y[ " + i +"] :" ); y.add(new Integer(i)); } List<Integer> all = new ArrayList<Integer>(); all.addAll(x); all.addAll(y); System.out.println(all); } } I did this but its not taking values from user. pls tell me why....

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  • array of objects of a class

    - by anurag18294
    #include class test{ int a; char b; public: test() { cout<<"\n\nDefault constructor being called"; } test(int i,char j) { a=i; b=j; cout<<"\n\nConstructor with arguments called"; } }; int main() { test tarray[5]; test newobj(31,'z'); }; In the above code snippet can we intialize values to tarray[5].

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  • deleting an array that stores pointers to some objects

    - by memC
    hi, I am storing pointers to elements of a vec_A in an array A* a_ptrs[3] . Assume that vec_A will not be resized. So, a_ptrs[i] will point to the correct element. My question is: Suppose A* a_ptrs[3] is declared in a class B. Since it is not created using 'new' I am guessing I don't need to delete it in the destructor. Am I right?? class A { public: int getNumber(); A(int val); ~A(){}; private: int num; }; A::A(int val){ num = val; }; int A::getNumber(){ return num; }; int main(){ int i =0; int num; std::vector<A> vec_A; for ( i = 0; i < 10; i++){ vec_A.push_back(A(i)); } A* a_ptrs[3]; a_ptrs[0] = &vec_A[0]; a_ptrs[1] = &vec_A[3]; a_ptrs[2] = &vec_A[5]; for (i = 0; i<3; i++){ std::cout<<"\n: a_ptrs[i].getNumber() = "<<a_ptrs[i]->getNumber(); } std::cout << "\nPress RETURN to continue..."; std::cin.get(); return 0; }

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  • Objects with inheritance memory storage

    - by nikitas350
    Say that i have some classes like this example. class A { int k, m; public: A(int a, int b) { k = a; m = b; } }; class B { int k, m; public: B() { k = 2; m = 3; } }; class C : private A, private B { int k, m; public: C(int a, int b) : A(a, b) { k = b; m = a; } }; Now, in a class C object, are the variables stored in a specific way? I know what happens in a POD object, but this is not a POD object...

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  • Problem in LINQ query formation

    - by Newbie
    I have written List<int> Uids = new List<int>(); Uids = (from returnResultSet in ds.ToList() from portfolioReturn in returnResultSet.Portfolios from baseRecord in portfolioReturn.ChildData select new int { id = baseRecord.Id }).ToList<int>(); Getting error: 'int' does not contain a definition for 'id' what is the problem that i created? Thanks

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  • jquery add remove objects

    - by Scarface
    Hey guys quick question, I have an add remove script that will add a unique element and should remove it on a click function but does not. I think it is because the added object is not in the DOM when page is loaded but I am not sure how to fix this. IF anyone has any advice I would greatly appreciate it. $(document).ready(function(){ if (action=='content-change'){ $('#droppable2-inner').empty().append('<div id="content-image"><img id="visual-background2" src=' + src + '></div><div id="drop-content" action="drop-image">x</div>'); } $("#drop-content").click(function() { $('#content-image').remove(); }); })

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  • referencing desired objects in namespaced functions

    - by RyOnLife
    I'm having trouble referencing the desired object when I've namespaced functions. No problems here: obj.test = function() { // this == obj } But I'm getting tripped up when I namespace: obj.namespace.test = function() { // this == namespace } In the latter example, I know this references namespace, but I want to reference obj. How can I do it?

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  • Linq to Entities: cannot be translated into a store expression

    - by FM250
    I am trying to execute this query, but I am getting an error: cannot be translated into a store expression. If I can't do it this way how can I implement it? I am using C#. I am trying to display training records if the date taken is not this year. Any suggestion is highly appreciated. tr = from l in t.Trainees where !db.UserTrainings.Any(ut => ut.Trainees.TraineeId == l.TraineeId && ut.Passed == true && ut.DateTaken >= l.DateEnded.Value.AddYears(-1)) ...... rest of the query.

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  • jQuery plugin to style objects

    - by Alex
    Hi. I've been looking at the various JavaScript UI libraries and am wondering if there's one that can add some styling to page elements. I'm currently adding rounded corners, shadows, borders, and gradients via my own CSS + hacks to get it working on IE. I'm using jQuery for a number of tasks and wondered if there's a plugin that can add these design flairs more easily to DIVs. Not that you want to go overboard with this stuff, but when you need to use it, you'd like to depend on cross-browser and tried-and-tested solutions. Thanks.

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  • The right way to implement communication between java objects

    - by imoschak
    I'm working on an academic project which simulates a rather large queuing procedure in java. The core of the simulator rests within one package where there exist 8 classes each one implementing a single concept. Every class in the project follows SRP. These classes encapsulate the behavior of the simulator and inter-connect every other class in the project. The problem that I has arisen is that most of these 8 classes are, as is logical i think, tightly coupled and each one has to have working knowledge of every other class in this package in order to be able to call methods from it when needed. The application needs only one instance of each class so it might be better to create static fields for each class in a new class and use that to make calls -instead of preserving a reference in each class for every other class in the package (which I'm certain that is incorrect)-, but is this considered a correct design solution? or is there a design pattern maybe that better suits my needs?

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  • [C++] Passing around objects to network packet handlers ?

    - by xeross
    Hey, I've been writing a networking server for a while now in C++ and have come to the stage to start looking for a way to properly and easily handle all packets. I am so far that I can figure out what kind of packet it is, but now I need to figure out how to get the needed data to the handler functions. I had the following in mind: Have a map of function pointers with the opcode as key and the function pointer as value Have all these functions have 2 arguments, packet and ObjectAccessor ObjectAccessor class contains various functions to fetch various items such as users and alike Perhaps pass the user's guid too so we can fetch it from the objectaccessor I'd like to know the various implementations others have come up with, so please comment on this idea and reply with your own implementations. Thanks, Xeross

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  • how to filter selected objects then hide objects not selected.

    - by ussteele
    following up from yesterday... This portion of the code does work. $(document).ready(function(){ $('#listMenu a').click(function (selected) { var getPage = $(this).attr('id'); var getName = $(this).attr('name'); //console.log(getPage); //console.log(getName); $(function() { $("#" + getName ).show(); var getColor = $('#' + getName ).css('background-color'); $('#header' ).css('background', getColor); $('#slideshow' ).css('background', getColor); $('span').css('background', getColor); $('#menuContainer').css('background', getColor); }); $('li.listMenu ul').hide(); }); }); I am able to get what I wanted selected; based on vars getPage and getName, now I need to hide what is not selected. I have tried this: $(function() { var notSelected = $('div').filter(selected).attr('id', 'name'); $(this).hide(); console.log(notSelected); }); placed just above: $('li.listMenu ul').hide(); but it's not correct, remember I am really a newbie. what I see on screen is the new selected items on top of what should be hidden. again any help is appreciated. -sjs

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  • Persisting objects to a database using a loop

    - by ChaoticLoki
    I have a form that returns multiple values and each value I would like to store in a database, I created a test form for this purpose <form method="post" action="{{ path('submit_exercise', {'page': 1}) }}"> <input type="hidden" name="answers[]" value="Answer 1" "/> <input type="hidden" name="answers[]" value="Answer 2" "/> <input type="hidden" name="answers[]" value="Answer 3" "/> <input type="hidden" name="answers[]" value="Answer 4" "/> <input type="hidden" name="answers[]" value="Answer 5" "/> <input type="hidden" name="answers[]" value="Answer 6" "/> <input type="hidden" name="answers[]" value="Answer 7" "/> <input type="submit" name="submit" /> </form> </body> </html> My submit answers Action is currently written like so. public function submitAnswersAction($page) { //get submitted data $data = $this->get('request')->request->all(); $answers = $data['answers']; //get student ID $user = $this->get('security.context')->getToken()->getUser(); $studentID = $user->getId(); //Get Current time $currentTime = new \DateTime(date("Y-m-d H:m:s")); //var_dump($answers); //var_dump($studentID); //var_dump($currentTime); for($index = 0; $index < count($answers); $index++) { /*echo "Question ". ($index + 1) ."<br />"; echo "Student ID: ". $studentID."<br />"; echo "Page Number: $page <br />"; echo "Answer: $answers[$index]"."<br />"; echo "<br />";*/ $studentAnswer = new StudentAnswer(); $studentAnswer->setStudentID($studentID); $studentAnswer->setPageID($page); $studentAnswer->setQuestionID($index+1); $studentAnswer->setAnswer($answers[$index]); $studentAnswer->setDateCreated($currentTime); $studentAnswer->setReadStatus(0); $database = $this->getDoctrine()->getManager(); $database->persist($studentAnswer); $database->flush(); } return new Response('Answers saved for Student: '.$user->getFullName().' for page: '.$page); When I do a var_dump everything seems to be associated correctly, meaning that the answers array is populated with the right data and so is every other variable, my problem is actually persisting it to the database. when run it returns with this error which seems to me like it doesn't know what variables to put into the row. An exception occurred while executing 'INSERT INTO Student_Answer (student_id, page_id, question_id, answer, read, date_created) VALUES (?, ?, ?, ?, ?, ?)' with params {"1":2,"2":"1","3":1,"4":"Answer 1","5":0,"6":"2012-12-11 12:12:20"}: Any help would be greatly appreciated as this is a personal project to help me try and understand web development a bit more.

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  • Adding different objects to array, but only one object repeating

    - by Carpetfizz
    I have a small piece of PHP code that goes through valid values and fetches information about them. It then pushes it to an array. For some reason, I'm only getting the last item of $row, repeated several times. When I try to print_r at #1 in the code, the expected values are outputted. However, at the end of the loop, or outside of it, when I try to print_r($ipArray), I'm only getting the last value repeated multiple times. Any help would be much appreciated! while($row = mysqli_fetch_array($getIpQuery, MYSQLI_NUM)){ for($x=0;$x<count($row);$x++) { $getIpInfo = mysqli_query($dbcon, "SELECT * FROM ipInfo WHERE address='$row[$x]'"); $retrievedInfo = mysqli_fetch_array($getIpInfo, MYSQLI_NUM); $ipInfo->ipAddress = $retrievedInfo[0]; $ipInfo->portNum = $retrievedInfo[1]; print_r($ipInfo); //#1: Works perfectly fine. array_push($ipArray,$ipInfo); } } print_r($ipArray); //this is where I'm getting an output of only the last element of `$row`. Thanks! ~Carpetfizz

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  • ArrayList of my objects, indexOf problem

    - by majtits
    Hello! I have problem with Java's ArrayList. I've created an Object, that contains two atributes, x and y. Now I've loaded some object in my ArrayList. Problem is that I don't know how to find index of some object with x atribute I'm searching. Is there any way to do this?

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  • Accessing Extension Objects

    - by LB
    I've added an object to the XsltArgumentList. I was wondering how I could access and display it in my transformation? xslarg.AddExtensionObject("someKey", "someValue"); However, when I transform, I wan't to be able to display "someValue". Any idea how? Thanks.

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  • jQuery accessing objects

    - by user1275268
    I'm trying to access the values of an object from a function I created with a callback, but have run into some trouble. I'm still fairly new at jQuery/javascript. I call the function as follows: siteDeps(id,function(data){ $.each(data,function(key,val) { console.log(key); console.log(val); }); }); The function runs 5 ajax queries from XML data and returns data as an multidimensional object; here is a excerpt showing the meat of it: function siteDeps(id,callback) { var result = { sitecontactid : {}, siteaddressid : {}, sitephoneid : {}, contactaddressid : {}, contactphoneid : {} }; ...//.... var url5 = decodeURIComponent("sql2xml.php?query=xxxxxxxxxxx"); $.get(url5, function(data){ $(data).find('ID').each(function(i){ result.delsitephoneid[i] = $(this).text(); }); }); callback(result); } The console.log output shows this: sitecontactid Object 0: "2" 1: "3" __proto__: Object siteaddressid Object 0: "1" __proto__: Object sitephoneid Object 0: "1" 1: "5" 2: "54" __proto__: Object contactaddressid Object 0: "80" __proto__: Object contactphoneid Object 0: "6" __proto__: Object How can I extract the callback data in a format I can use, for instance sitephoneid: "1","5","54" Or is there a better/simpler way to do this? Thanks in advance.

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  • Expression Tree

    - by nettguy
    My understanding of expression tree is : Expression trees are in-memory representation of expression like arithmetic or boolean expression.The expressions are stored into the parsed tree.so we can easily transalate into any other language. Linq to SQL uses expression tree.Normally in LINQ to SQL query the compiler translates it into parsed expression trees.These are passed to Sql Server as T-SQL Statements.The Sql server executes the T-SQL query and sends down the result back.That is why when you execute LINQ to SQL you gets IQueryable<T> not IEnumetrable<T>.Because IQuerybale contains public IQueryable:IEnumerable { Type Element {get;} Expression Expression {get;} IQueryaleProvider Provider {get;} } Questions : Microsoft uses Expression trees to play with LINQ-to-Sql.What are the different ways can i use expression trees to boost my code. Apart from LINQ to SQL,Linq to amazon ,who used expression trees in their applications? Linq to Object return IEnumerable,Linq to SQL return IQueryable ,What does LINQ to XML return?

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