Search Results

Search found 48847 results on 1954 pages for 'class attribute'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 124/1954 | < Previous Page | 120 121 122 123 124 125 126 127 128 129 130 131  | Next Page >

  • c++ class in cocoa

    - by joels
    Any ideas why Xcode wont let me define a c++ class in my cocoa project? I am trying to use a C++ class in my cocoa project but I am getting build errors just creating the c++ header file. class SomeClass{ public: int count; } Expected '=', ',', ';', 'asm' or 'attribute' before 'SomeClass' in ..... If I remove all code from the header file, ?the cpp file builds without any errors and is included in the list of compiled sources...

    Read the article

  • How does the below program work in c++?

    - by Srinivasa Varadan
    I have just created 2 pointers which has undefined behavior and try to invoke a class member function which has no object created ? I don't understand this? #include<iostream> using namespace std; class Animal { public: void talk() { cout<<"I am an animal"<<endl; } }; class Dog : public Animal { public: void talk() { cout<<"bark"<<endl; } }; int main() { Animal * a; Dog * d; d->talk(); a->talk(); }

    Read the article

  • Sharing class member data between sub components

    - by Tim Gradwell
    I have an aggregate 'main' class which contains some data which I wish to share. The main class also has other class members. I want to share the data with these other class members. What is the correct / neatest way to do this? The specific example I have is as follows. The main class is a .net Form. I have some controls (actually controls within controls) on the main form which need access to the shared data. Main Form - DataX - DataY - Control1 -- Subcontrol1 - Control2 -- SubControl2 SubControls 1 and 2 both wish to access DataX and DataY. The trouble is, I feel like better practice (to reduce coupling), would be that either subcontrols should not know about Main Form, or Main Form should not know about subcontrols - probably the former. For subcontrols not to know about Main Form, would probably mean Main Form passing references to both Controls 1 and 2, which in turn would pass the references on to SubControls 1 and 2. Lots of lines of code which just forward the references. If I later added DataZ and DataW, and Controls 3 and 4 and SubControls 3 and 4, I'd have to add lots more reference forwarding code. It seems simpler to me to give SubControls 1 and 2 member references to Main Form. That way, any sub control could just ask for MainForm.DataX or MainForm.DataY and if I ever added new data, I could just access it directly from the sub controls with no hassle. But it still involves setting the 'MainForm' member references every time I add a new Control or Subcontrol. And it gives me a gut feeling of 'wrong'. As you might be able to tell I'm not happy with either of my solutions. Is there a better way? Thanks

    Read the article

  • is this class thread safe?

    - by flash
    consider this class,with no instance variables and only methods which are non-synchronous can we infer from this info that this class in Thread-safe? public class test{ public void test1{ // do something } public void test2{ // do something } public void test3{ // do something } }

    Read the article

  • Write a tree class in Java where each level has a unique object type

    - by user479576
    I need to write a tree class in Java where each level has a unique object type. The way it is written below does not take advantage of generics and causes alot of duplicate code. Is there a way to write this with Generics ? public class NodeB { private String nodeValue; //private List<NodeB> childNodes; // constructors // getters/setters } public class NodeA { private String value; private List<NodeB> childNodes; // constructors // getters/setters } public class Tree { private String value; private List<NodeA> childNodes; // constructors // tree methods }

    Read the article

  • JQuery setting the selected attribute on a select list

    - by Rupert
    I have the following html <select id="dropdown"> <option>A</option> <option>B</option> <option>C</option> </select> I have the string "B" so I want to set the selected attrribute on it so it will be: <select id="dropdown"> <option>A</option> <option selected="selected">B</option> <option>C</option> </select> How would I do this in JQuery?

    Read the article

  • 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?

    Read the article

  • jquery, attaching objects (instead of string attribute) to an element

    - by binaryLV
    Hi! I'm trying to build DOM with jQuery and fill it with data that is received with AJAX (data type = json). I'd like to also store this data as an object, attached to a specific DOM element. Does jQuery provide any method for this? The reason I want to do it is because only part of data is initially displayed; other data might be needed later, depending on user actions. I tried using attr(), but it stores a string "[object Object]" instead of an actual object: var div = $('<div/>'); div.attr('foo', {bar: 'foobar'}); alert(div.attr('foo')); // gives "[object Object]" alert(typeof div.attr('foo')); // gives "string" alert(div.attr('foo').bar); // gives "undefined" Another way to do this would be by "bypassing" jQuery (div[0].foo = {bar: 'foobar'};), though this seems to be a "dirty workaround", if jQuery happens to already support attaching objects. Any ideas? Thanks in advance!

    Read the article

  • Dynamic decision on which class to use

    - by Sirupsen
    Hello, Let's say I have a class named Klass, and a class called Klass2. Depending on the user's input, I'd like to decide whether I'll call "hello_world" on Klass, or Klass2: class Klass def self.hello_world "Hello World from Klass1!" end end class Klass2 def self.hello_world "Hello World from Klass2!" end end input = gets.strip class_to_use = input puts class_to_use.send :hello_world The user inputs "Klass2" and the script should say: Hello World from Klass2! Obviously this code doesn't work, since I'm calling #hello_world on String, but I'd like to call #hello_world on Klass2. How do I "convert" the string into a referrence to Klass2 (or whatever the user might input), or how could I else would I achieve this behavior?

    Read the article

  • Why delegate types are derived from MulticastDelegate class why not it directly derive from Delegate class?

    - by Vijay
    I have a very basic question regarding delegate types. I compared the memebers of Delegate and MulticastDelegate classes in object browser and I couldn't find any new additional member present in MulticastDelegate. I also noticed that the Delegate class has GetInvocationList virtual method. So I assume that the Delegate class should have the capability to hold references to multiple methods. If my assumption is correct I wonder why not custom delegate types directly derive from the Delegate class instead of MulticastDelegate class. Not sure what I am missing here. Please help me understand the difference.

    Read the article

  • Normalized class design and code first

    - by dc7a9163d9
    There are the following two classes. public class Employee { int EmployeeId { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public string Street { get; set; } public string Street2 { get; set; } public string City { get; set; } public string State { get; set; } public string Zip { get; set; } } public class Company { int CompanyId { get; set; } public string Name { get; set; } public string Street { get; set; } public string Street2 { get; set; } public string City { get; set; } public string State { get; set; } public string Zip { get; set; } } In a DDD seminar, the speaker said the better design should be, class PersonName { public string FirstName { get; set; } public string LastName { get; set; } } class Address { public string Street { get; set; } public string Street2 { get; set; } public string City { get; set; } public string State { get; set; } public string Zip { get; set; } } public class Employee { int EmployeeId { get; set; } public PersonName Name { get; set; } [ForeignKey("EmployerAddress")] public int EmployerAddressId { get; set; } public virtual Address EmployerAddress { get; set; } } public class Company { int CompanyId { get; set; } public string Name { get; set; } [ForeignKey("CompanyAddress")] public int CompanyAddressId { get; set; } public virtual Address CompanyAddress { get; set; } } Is it the optimized design? How the code first generate the PersonName table and link it to Employee?

    Read the article

  • Operator & and * at function prototipe in class

    - by Puyover
    I'm having a problem with a class like this: class Sprite { ... bool checkCollision(Sprite &spr); ... }; So, if I have that clase, I can do this: ball.checkCollision(bar1); But if I change the class to this: class Sprite { ... bool checkCollision(Sprite* spr); ... }; I have to do this: ball.checkCollision(&bar1); So, what's the difference?? It's better a way instead other? Thank you.

    Read the article

  • Pair attribute naming in custom configSections

    - by fearofawhackplanet
    I'm trying to store a user list in a config file. I've been looking at DictionarySectionHandler and NameValueSectionHandler. I'm not too sure what the difference between these two is, but anyway, neither of them do exactly what I'd like. You can add a custom config section like so: <configSections> <section name="userAges" type="System.Configuration.DictionarySectionHandler"/> </configSections> <userAges> <add key="userName1" value="10" /> <add key="userName2" value="52" /> <userAges> Which is ok, but actually I'd prefer to be able to write: ... <userAges> <add user="userName1" age="10" /> <add user="userName2" age="52" /> <userAges> Which I feel would make the config file clearer to anyone who needed to add/remove users in future. Is there an easy way to do this?

    Read the article

  • Should I pointer-cast from a private derived class to its base class?

    - by skydoor
    I found this from C++FAQ Generally, No. From a member function or friend of a privately derived class, the relationship to the base class is known, and the upward conversion from PrivatelyDer* to Base* (or PrivatelyDer& to Base&) is safe; no cast is needed or recommended. However users of PrivatelyDer should avoid this unsafe conversion, since it is based on a private decision of PrivatelyDer, and is subject to change without notice. How to understand the above words? I don't think the explanation is correct or accurate. I have a code like this class A{ }; class B: private A{ }; int main(){ B *b = new B(); A *a = new A(); a = b; //wrong a = (A*)b; //right }

    Read the article

  • Flex 4: Loading XML into a Model Actionsript Class

    - by Steve
    I'm trying to create an actionscript class to serve as a data model for my Flex app. I already have a formatted XML file to read from, and when I was simply declaring the data service in my MXML app I used this code inside the declarations: I'm now trying to create a model class and can't seem to get the same functionality. I've tried importing mx.rpc.http.HTTPService but i think this is different. And using the XML class doesn't seem to allow the ability to define a source url. I'm assuming that I am able to declare a public var inside my class that will read this XML source file as I had done in the main app. If this is possible, how do I do it?

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 120 121 122 123 124 125 126 127 128 129 130 131  | Next Page >