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  • int vs const int&

    - by Valdo
    I've noticed that I usually use constant references as return values or arguments. I think the reason is that it works almost the same as using non-reference in the code. But it definitely takes more space and function declarations become longer. I'm OK with such code but I think some people my find it a bad programming style. What do you think? Is it worth writing const int& over int? I think it's optimized by the compiler anyway, so maybe I'm just wasting my time coding it, a?

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  • jQuery Reference First Column in HTML Table

    - by Vic
    I have a table where all of the cells are INPUT tags. I have a function which looks for the first input cell and replaces it with it's value. So this: <tr id="row_0" class="datarow"> <td><input class="tabcell" value="Injuries"></td> <td><input class="tabcell" value="01"></td> becomes this: <tr id="row_0" class="datarow"> <td>Injuries</td> <td><input class="tabcell" value="01"></td> Here is the first part of the function: function setRowLabels() { var row = []; $('.dataRow').each(function(i) { row.push($('td input:eq(0)', this).val() + ' - '); $('td input:eq(0)', this).replaceWith($('td input:eq(0)', this).val()); $('td input:gt(0)', this).each(function(e) { etcetera But when the page reloads, the first column is not an input type, so it changes the second column to text too! Can I tell it to only change the first column, no matter what the type is? I tried $('td:eq(0)', this).replaceWith($('td:eq(0)', this).val()); but it does not work. Any suggestions appreciated! Thanks

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  • Passing data from one viewcontroller to another

    - by user1392515
    I subclassed two view controllers. The first one is supposed to pass data, a NSUrl object to the second one. .m of the first one: NSURL *temp = [NSURL URLWithString:@"http://example.com"]; UIViewController *presentationsFullScreen_ViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"PresentationsFullScreen_ViewController"]; presentationsFullScreen_ViewController.urlToUse = temp; .h of the second one: #import <UIKit/UIKit.h> @interface PresentationsFullScreen_ViewController : UIViewController { NSURL *urlToUse; } @property (nonatomic,retain) NSURL *urlToUse; It is obviously not working and not compiling,telling me essentially that I didn't subclass it and that the property urlToUse is not found on UIViewController. How do I subclass correctly? Thanks!

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  • Passing a class ("Country.class") as an argument in Java

    - by Coronatus
    I'm trying to make a method that takes an argument of Country.class, User.class etc, and returns argument.count(). All the possible classes that I would give to this method extend from Model and have the method count(). My code: private static long <T> countModel(Model<T> clazz) { return clazz.count(); } Called by: renderArgs.put("countryCount", countModel(Country.class)); However this just doesn't work at all. How do I do this, please?

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  • Passing list of items from Controller/Model to a variable in javascript - autocomplete

    - by newbie_developer
    I've a method in a NamesModel which fetches all the names and returns a list of names: public static List<NamesModel> GetAllNames() { List<NamesModel> names = new List<NamesModel>(); // // code to fetch records // return names; } In my controller: public ActionResult Index() { NamesModel model = new NamesModel(); model.GetAllNames(); return View(model); } In the view, I've got a textbox: @Html.TextBox("search-name") Now in my javascript, I want to fetch all names into a variable either from a model (from method) or from controller, for example: <script type="text/javascript"> $(function () { var names = ........... $(document).ready(function () { $('#search-name').autocomplete({ source: names }); }); }); </script> If I use hardcoding then it works but I want to use the names stored in the db. Is it possible? hardcoding example: var names = ["abc", "xyz"];

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  • passing id to controller

    - by coure06
    I have 4-5 partial view files (.ascx) like abc.ascx, cde.ascx, fgh.ascx. I want to return different partial views based on the name of the view passed to url parameter like this /someservice/abc will go to action someservice and will return abc.ascx partial view. /someservice/cde will go to action someservice and will return cde.ascx partial view. How can achieve this?

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  • Passing arguments to a function?

    - by dfjhdfjhdf
    I need to learn how to pass an associative array to a function so that I could do the following within the function: function someName($argums) { if (gettype($argums) != 'array' || !array_key_exists('myOneKey', $argums) || !array_key_exists('myOtherKey', $argums)) { return false; } /*do other stuff*/ } (That's how I would do in PHP what I am looking for in JavaScript.)

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  • passing different structs to a function in c

    - by clear2k
    I have different structures that need to be filled out the same way. The only difference is that they are filled based on different data. I was wondering if it's possible to pass different structures to a certain function. What I have in mind is something like: struct stu1 { char *a; int b; }; struct stu2 { char *a; int b; }; static struct not_sure **some_func(struct not_sure *not_sure_here, original_content_list) { // do something and return passed struct for(i=0; i<size_of_original_content_list; i++){ //fill out passed structure } return the_struct; } int main(int argc, char *argv[]) { return_struct1 = some_func(stu1); return_struct2 = some_func(stu2); // do something separate with each return struct... } Any comments will be appreciate it.

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  • passing a parameter from an other model on ruby

    - by MAGE
    I'm very newbie in ruby and need your help. I must save a "Topic" and make it like this : @topic = Topic.new(params[:topic]) But I would like to pass an other information to this topic. It has a field "community_id" that link it to a community. The logged user has this information on his table. How can I pass the "community_id" from the logged user to the "community_id" of the "topic" created ? thx for your help

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  • Reference to fnc.

    - by atch
    Hi guys, Is there a way in java to do something like this: void fnc(void Reference_to_other_func()); What I'm trying is basically I have number of places where I need to display this same text to the user and the only difference is which method is invoked after this text. So for example instead of writing: System.out.println("Hello"); f1(); //in some other place System.out.println("Hello"); f2(); //etc I would like to define one function: public void f(void Reference_to_other_func()) { System.out.println("Hello"); Reference_to_other_func();//HERE I'M INVOKING } and then instead of repeating this whole code I could write something like this: f(f1); //in some other place f(f2) //etc. Thanks for answers

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  • passing array fields to jquery ajax

    - by Rob Brandt
    I have a form I am submitting via jquery ajax. Early in the form, I have this field: <select name="inquirymodule[]" id="inquirymodule"> The user can add as many as they like, and all the selects go into the inquirymodule[] array. The jQuery looks like this: jQuery.ajax({ type: 'POST', url: 'ajax.php', dataType: 'json', data: { inquirymodule: jQuery("select[name='inquirymodule[]']").serialize(), }, error: function(XMLHttpRequest, textStatus, errorThrown) { alert('error'); } }); That works fine. Trying to do the same thing with a date, like this: <input class="formInput" type="text" id="startBreak0" name='startbreak[]' /> adding startbreak: jQuery("select[name='startbreak[]']").serialize() to the ajax call. It doesn't work, I cannot see why. Suggestions?

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  • PHP Variable Passing in Foreach on same page

    - by tooly228
    I've been struggling this for a while and I simply can't figure this out. Here is my code: <?php foreach($list as $id =>$name) { echo("<td style=\"vertical-align:middle;\"> <a href=\"item=$id#confirm\" role=\"button\" data-toggle=\"modal\"> Buy</a></td></tr>"); }?> <html> <div class="modal small hide fade" id="confirm" tabindex="-1" role="dialog" aria- labelledby="myModalLabel" aria-hidden="true"> <a href="redeem.php?item=<?php echo $id; ?>"><button class="btn btn-danger"> Buy</button></a></div> The main issue here is that the $id from the foreeach is not the same as the $id in the div class link. Instead the link is the end value of the foreach list.

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  • How to get reference of activity object ?

    - by Fevos
    Hi i want to show messageBox or notification when connection lost in Static DB class but i cant use getApplicationContext() becouse its a static class and i tried to call other class called notification but i have error so how i could pass activity object to my new class .

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  • Passing a variable that can be updated

    - by Rob Bonner
    This seems like a simple thing, but can't get it to work. I pass a variable into a UIViewController thourgh a standard property: [aViewController setProposedDate:proposedWorkLog.entryDate]; which is retained by the controller, and possible changed. I have verified that in the controller, the data is modified. But, after it is popped off the stack and I look in the calling view, the data has not been updated. Is there a way to pass this variable and have it retain the new value, or a way to pass back a response from a closing view controller? Thanks!

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  • Misunderstanding function pointer - passing it as an argument

    - by Stef
    I want to pass a member function of class A to class B via a function pointer as argument. Please advise whether this road is leading somewhere and help me fill the pothole. #include <iostream> using namespace std; class A{ public: int dosomeA(int x){ cout<< "doing some A to "<<x <<endl; return(0); } }; class B{ public: B(int (*ptr)(int)){ptr(0);}; }; int main() { A a; int (*APtr)(int)=&A::dosomeA; B b(APtr); return 0; } This brilliant piece of code leaves me with the compiler error: cannot convert int (A::*)(int)' toint (*)(int)' in initialization Firstly I want it to compile. Secondly I don't want dosomeA to be STATIC.

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  • Passing class method as selector problem.

    - by Anoide
    Hi, I want to build a selector from a class method. I'm doing it this way: NavigationTreeActionHandler* handler=[NavigationTreeActionHandler self]; NavigationTreeNode* bombsNode=new NavigationTreeNode("Bombs","bigbomb.tif" ,handler,@selector(BigBombButtonPressed:)); I need to pass to NavigationTreeNode the target and the selector to the target method. I try to get the target using the self property of the class object (Don't know if htis is the correct way to do it). Then I get the selector for the class method I want to call on the class. Everything compiles ok but it fails when I use: [[handler class] instanceMethodSignatureForSelector:selector]; I get a nil and don't really know why... could anybody help please? Thanks in advance, Olson.

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  • Haskell Input & Passing Values to Functions

    - by Pradeep
    putStrLn "Enter the Artist Name" art <- getLine putStrLn "Enter the Number of CD's" num <- getLine let test= buyItem currentStockBase art num printListIO (showcurrentList test) the values i have to pass for buyItem is buyItem currentStockBase "Akon" 20 but i want to send "Akon" to art and for 20 i want to send num it gives me this error ERROR file:.\Project2.hs:126 - Type error in application *** Expression : buyItem currentStockBase art num *** Term : num *** Type : [Char] *** Does not match : Int please help me

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  • Problem with passing array of pointers to struct among functions in C

    - by karatemonkey
    The Code that follows segfaults on the call to strncpy and I can't see what I am doing wrong. I need another set of eyes to look it this. Essentially I am trying to alloc memory for a struct that is pointed to by an element in a array of pointers to struct. #include <stdio.h> #include <stdlib.h> #include <string.h> #define MAX_POLICY_NAME_SIZE 64 #define POLICY_FILES_TO_BE_PROCESSED "SPFPolicyFilesReceivedOffline\0" typedef struct TarPolicyPair { int AppearanceTime; char *IndividualFile; char *FullPolicyFile; } PolicyPair; enum { bwlist = 0, fzacts, atksig, rules, MaxNumberFileTypes }; void SPFCreateIndividualPolicyListing(PolicyPair *IndividualPolicyPairtoCreate ) { IndividualPolicyPairtoCreate = (PolicyPair *) malloc(sizeof(PolicyPair)); IndividualPolicyPairtoCreate->IndividualFile = (char *)malloc((MAX_POLICY_NAME_SIZE * sizeof(char))); IndividualPolicyPairtoCreate->FullPolicyFile = (char *)malloc((MAX_POLICY_NAME_SIZE * sizeof(char))); IndividualPolicyPairtoCreate->AppearanceTime = 0; memset(IndividualPolicyPairtoCreate->IndividualFile, '\0', (MAX_POLICY_NAME_SIZE * sizeof(char))); memset(IndividualPolicyPairtoCreate->FullPolicyFile, '\0', (MAX_POLICY_NAME_SIZE * sizeof(char))); } void SPFCreateFullPolicyListing(SPFPolicyPair **CurrentPolicyPair, char *PolicyName, char *PolicyRename) { int i; for(i = 0; i < MaxNumberFileTypes; i++) { CreateIndividualPolicyListing((CurrentPolicyPair[i])); // segfaults on this call strncpy((*CurrentPolicyPair)[i].IndividualFile, POLICY_FILES_TO_BE_PROCESSED, (SPF_POLICY_NAME_SIZE * sizeof(char))); } } int main() { SPFPolicyPair *CurrentPolicyPair[MaxNumberFileTypes] = {NULL, NULL, NULL, NULL}; int i; CreateFullPolicyListing(&CurrentPolicyPair, POLICY_FILES_TO_BE_PROCESSED, POLICY_FILES_TO_BE_PROCESSED); return 0; }

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  • Passing values between web pages

    - by Khou
    I need to pass a dollar amount from one webpageto another webpage without letting the user modify the values when the values are passed between these pages. ie Page 1 (entry page) to Page 2 (confirmation page) What is the best way to do this?

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  • Access a static variable by $var::$reference

    - by chuckg
    I am trying to access a static variable within a class by using a variable class name. I'm aware that in order to access a function within the class, you use call_user_func(): class foo { function bar() { echo 'hi'; } } $class = "foo"; all_user_func(array($class, 'bar')); // prints hi However, this does not work when trying to access a static variable within the class: class foo { public static $bar = 'hi'; } $class = "foo"; call_user_func(array($class, 'bar')); // nothing echo $foo::$bar; // invalid How do I get at this variable? Is it even possible? I have a bad feeling this is only available in PHP 5.3 going forward and I'm running PHP 5.2.6. Thanks.

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  • Passing html attribute value to the next script in php

    - by NewBiL
    I have three php scripts. main.php questions.php and values.php Here's the code main.php <html> <head> <title></title> </head> <body> <h1>Be Prepare for the battle</h1> <?php $strTitle = "Begin"; $strLink = "<a href = 'question.php?ques_id=1'>" . $strTitle ."</a>"; echo $strLink; ?> </body> </html> questions.php <?php require_once('../connect.php'); $quesSQL = mysql_query("SELECT * FROM `questions` WHERE `ques_id`=". $_GET["ques_id"]); if(!mysql_num_rows($quesSQL)>=1) { die('Complete.'); } $next = $_GET["ques_id"]; while($row = mysql_fetch_array($quesSQL)) { $id = $row['ques_id']; $strTitle = $row['ques_title']; echo "<li>". $strTitle ."</li><br/>"; } $optSQL = mysql_query("SELECT `options`,`values` FROM questions_options WHERE ".$id."= ques_id"); echo "<form action=\"values.php\" method=\"POST\">"; while($row = mysql_fetch_array($optSQL) ) { $strOptions = $row['options']; $strValues = $row['values']; echo "<input type =\"radio\" name =\"valueIn\" value=".$strValues." />". $strOptions ."<br/>"; } echo "</form>"; $strTitle = "<input type =\"submit\" value=\"Next\">"; $next = $next+1; $strLink = "<a href = 'values.php?ques_id=".$next."'>" . $strTitle ."</a>"; echo $strLink; mysql_close(); ?> and values.php <?php require_once('../connect.php'); $input = $_POST['valueIn']; $ansSQL = mysql_query("SELECT `answer` FROM questions WHERE 1-".$_GET["ques_id"]."= ques_id"); $marks = 0; if($input == $ansSQL) { $marks = $marks+1; } else { $marks = $marks+0; } echo $marks; ?> Now problem is i have to pass one value from second script(questions.php) to third script(values.php). And it is from the <form> section in radio button's name value "valueIn". But I can't do that. Because I'm sending another value ques_id with $strLink variable at the end of the second script. So how can i do that?

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