Here we go, I'm trying to implement the command design pattern, but I'm stumbling accross a conceptual problem. Let's say you have a base class and a few subclasses like in the example bellow : class Command : public boost::noncopyable { virtual ResultType operator()()=0; //restores the model state as it was before command'...
I have been doing some tests (to replace old code) with the __invoke magic method and I'm not sure this is a bug or not: Lets suppose we have a class: class Calc { function __invoke($a,$b){ return $a*$b; } } The following is possible and works without any problem: $c = new Calc; $k = $c; echo $k(4,5); //outputs 20 ...
New console project template creates a Main method like this: class Program { static void Main(string[] args) { } } Why is it that neither the Main method nor the Program class need to be public? ...
In Ruby, how do you refer to a function without invoking it, because foo is the same as foo() so it is already invoked. for example, puts.class is the same as puts().class ...
In a UIViewController subclass I create a bar button item that fires an event up the responder chain: UIBarButtonItem* editListsButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonItemStyleBordered target:nil action:@selector(edit)]; self.navigationItem.leftBarButtonItem = editListsButton; [editListsButton release];...
Strict Standards: Declaration of childClass::customMethod() should be compatible with that of parentClass::customMethod() What are possible causes of this error in PHP? Where can I find information about what it means to be compatible? ...
I'm using Delphi Pro 6. Right now, the only way to know if a class is missing a base class abstract method is to wait for the IDE to emit a "constructing instance of {derived class} containing abstract method {base class.abstract method name}" warning or to wait for a runtime Abstract Error method when an attempt to call the missing met...
For example, I've always seen methods referred to as String#split, but never String.split, which seems slightly more logical. Or maybe even String::split, because you could consider #split to be in the namespace of String. I've even seen the method alone, when the class is assumed/implied (#split). I understand that this is the way me...
Hello Geeks I have seen many php scripts in which you can cascade class method to produce a specific functionality for example as in codeigniter when you load a view you would type <?php class Posts extends Controller { function index() { $this->load->view("BlaBla"); } } ?> I am not completely sure ...
Hi I'm trying to author a jQuery plugin and I need to have methods accessible to elements after they are initialized as that kind of object, e.g.: $('.list').list({some options}); //This initializes .list as a list //now I want it to have certain methods like: $('.list').find('List item'); //does some logic that I need I tried with ...
I haven't been able to find a reference that defines what these methods are made up of. I kind of get what these methods do and what arguments they take, but I'm hoping to find out how they work. I'd like to find something that would give me a definition such as void System.Xml.Xmlreader() { //class constructor function } for all or...
The Scala compiler can often infer return types for methods, but there are some circumstances where it's required to specify the return type. Recursive methods, for example, require a return type to be specified. I notice that sometimes I get the error message "overloaded method (methodname) requires return type", but it's not a general...
Exactly what happens when Foo.SomeCheck() is called in the Bar class? Is an instance of Foo created in order to call SomeCheck()? If so, is this instance stored on the heap, and is it ever collected through garbage collection? public class Foo() { public static bool SomeCheck() { return true; } } public class Bar() { ...
What will be the value of the parameter i.e. private static boolean ask(int i){int te = 8 + i;} Coz i notice the 'i' was use in the method. I just wonder what will be the value of that 'i' and/or what's the use of it? ...
Why does this not work when I move the code in the first script block (without the script tag itself) to an external javascript file. The idea is to call homead.load() from home page and load everything processed by homead_build(); Error says 'homead not defined' using Firefox Error console <div id="box"> </div> <script type="text/j...
In python, I know that looking up a locally scoped variable is significantly faster than looking up a global scoped variable. So: a = 4 def function() for x in range(10000): <do something with 'a'> Is slower than def function() a = 4 for x in range(10000): <do something with 'a'> So, when I look at a cla...
Hi All, Recently I attended an interview, the interviewer is asking a question about restricting of method access. Q: In one class I have 3 methods (i.e. method1(), method2(), method3()), I am calling those 3 methods in same class, but I should call only first 2 method, I should restrict 3rd method, so nobody should call method3(). How...
I have defined a function called is_logged_in? in a user defined library stored in the /lib directory, however when I try to use it in one of my views (in this case a _menu.html.erb view) I get a "undefined method `is_logged_in?' for #" error. I had assumed that if the method was available within the /lib directory then it would be acces...
i have simple html page with 3 textboxes. <form id="form1" method=get action="http://mysite.com/default.aspx" runat="server"> <div> <input id="name" type="text" value="Amy" /> <input id="email" type="text" value="[email protected]"/> <input id="phone" type="text" value="2125552512" /> </div> <input id="Subm...
Original Question: Given a method I would like to determine if an object returned is created within the execution of that method. What sort of static analysis can or should I use? Reworked Questions: Given a method I would like to determine if an object created in that method may be returned by that method. So, if I go through and add a...