problem about dynamic-binding-Collection of common programming errors

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  iamyogish
  ios objective-c dynamic-typing dynamic-binding
  Hi I’m a newbie to objective-C ,today I was learning the concept of dynamic typing and binding, all was well until I wrote and executed this program#import <Foundation/Foundation.h> @interface A:NSObject @property int var; -(int)add:(A*)argObj; @end@implementation A @synthesize var; -(int)add:(A *)argObj {return (self.var + argObj.var); } @end@interface B:NSObject @property double var1; -(double)add:(B *)argObj; @end@implementation B @synthesize var1; -(double)add:(B *)argObj {return (self
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  bobobobo
  objective-c dynamic-binding
  Objective-C uses dynamic binding: that is method calls are resolved at runtime.Fine. And use of dot notation really boils down to a method callBut, why then, can’t I do something like this:#import <Foundation/Foundation.h>int main (int argc, const char * argv[]) {NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];// Intercept the exception@try{@throw [ NSException exceptionWithName:@”Exception named ME!” reason:@”Because i wanted to” userInfo:nil ] ;}@catch( id exc ) // pointer
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  Joe
  python binding cpython dynamic-binding
  In asking a question about reflection I asked:Nice answer. But there is a difference between saying myobject.foo() and x = getattr(myobject, “foo”); x();. Even if it is only cosmetic. In the first the foo() is compiled in statically. In the second, the string could be produced any number of ways. – Joe 1 hour ago Which got the answer:Eh, potato / solanum tuberosum… in python, niether is statically compiled, so they are more or less equivalent. – SWeko 1 hour agoI know that Python objects’ memb
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  artemb
  java guice dynamic-binding
  I am trying to use Guice for a test framework based on TestNG. This frameworks analyzes the test class for dependencies and provides them eliminating the need to build them in tests.Guice is all about injection and I think is a good fit for the framework. But the question is how do I define bindings after I have created the injector? This is needed because tests may override bindings to substitute default implementations with mocks.Besides that, I want to guess the implementation at runtime in s
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  knoxxs
  java polymorphism subclass superclass dynamic-binding
  I know for the case of overriding methods Java follows dynamic binding. But if we call a child only method from the parent reference variable, which is referring to child object, we got compilation error. Why java follow this design (i.e. why no dynamic binding in second case)?class A{public void sayHi(){ “Hi from A”; } }class B extends A{public void sayHi(){ “Hi from B”; public void sayGoodBye(){ “Bye from B”; } }main(){A a = new B();//Works because the sayHi() method is declared in A and overr
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  JPrescottSanders
  c# reflection logging log4net dynamic-binding
  I have a single-threaded application that loads several assemblies at runtime using the following:objDLL = Assembly.LoadFrom(strDLLs[i]);I would like the assemblies loaded in this manner to use the same log4net.ILog reference as the rest of the assemblies do. But it appears the runtime loaded assemblies have a different reference altogether and need their own configuration. Does anyone know if a single log4net.ILog can be used across assemblies loaded at runtime using a .NET interface?Here is th
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  Shashank
  wpf dynamic-binding
  i need to create below mention code at runtime in Wpf i.e. create AutoCompleteBox dynamically set size, width, location etc dynamically. Then set TabIndex dynamically. How to do this.<ToolKit:AutoCompleteBox Canvas.Left=”227″ Canvas.Top=”845″ Name=”txtFirstName” FontSize=”15″ Height=”30″ TabIndex=”4″ Width=”100″ PreviewTextInput=”txtFirstName_PreviewTextInput” ><ToolKit:AutoCompleteBox.TextBoxStyle><Style TargetType=”TextBox”><Setter Property=”TabIndex” Value=”{Binding E
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  Kamyar Nazeri
  c# dynamic dynamic-binding
  Why does the compiler let this expression to compile while the run-time exception is inevitable?I don’t think that the Dynamic Binding should work for void methodsstatic void Main(string[] args) {var res = Test((dynamic)”test”); // throws RuntimeBinderException exception at runtime }static void Test(dynamic args) { }If the C# spec is referring the above expression as dynamically bound expression why doesn’t the following method compile?static dynamic DynamicMethod() { }
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  Sean
  objective-c inheritance dynamic-binding late-static-binding
  I’m teaching myself Objective-C as a guilty pleasure, if you would. I have a self-proclaimed strong grasp of the Java language, so it’s not a terribly difficult transition – it sure is fun though. But alas, my question!I’m attempting to reproduce something that exists in PHP: Late Static Binding. In PHP, I can decorate a method call with “static::”, which will dynamically bind that method to the caller at runtime. On the other hand, if the keyword “self::” is used, the binding is static and is
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  Tomasz Nurkiewicz
  java inheritance polymorphism dynamic-binding
  Assume that I have these three classes:class Foo {void fn() {System.out.println(“fn in Foo”);} }class Mid extends Foo {void fn() {System.out.println(“fn in Mid”);} }class Bar extends Mid {void fn() {System.out.println(“fn in Bar”);}void gn() {Foo f = (Foo) this;f.fn();} }public class Trial {public static void main(String[] args) throws Exception {Bar b = new Bar();b.gn();} }Is it possible to call a Foo’s fn()? I know that my solution in gn() doesn’t work because this is pointing to an object of
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  srikanta
  java polymorphism dynamic-binding
  I am really confused about dynamic binding,static binding. I have read that determining the type of object at compile time is called static binding and determining at runtime is called dynamic binding What happens in the below codeStatic binding or dynamic binding? And wht kind of polymorphism? class Animal {void eat(){System.out.println(“Animal is eating”);} }class Dog extends Animal {void eat(){System.out.println(“Dog is eating”);} }public static void main(String args[]) {Animal a=new
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  softwarelover
  java polymorphism abstract dynamic-binding
  I was going over the official Oracle tutorial where it introduces the idea of polymorphism with the example of a class hierarchy of 3 classes; Bicycle being the superclass, and MountainBike and RoadBike being 2 subclasses.It shows how the 2 subclasses override a method “printDescription” declared in Bicycle, by declaring different versions of it.And finally, toward the end, the tutorial mentions the Java Virtual Machine (JVM) calls the appropriate method for the object that is referred to in eac
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  Cecil Has a Name
  c# dynamic-language-runtime dynamic-binding
  I need some DLR help. I am implementing an IDynamicMetaObjectProvider and DynamicMetaObject but I am having some issues getting the expected return type. I am overiding BindInvokeMember in the metaobject, I can see all the args types but no return type. Anyone know how I get to it if possible? I know the return type is dynamic but what if the thing you are invoking is dependent on a return type. I don’t know which action to perform in the DynamicMetaObject unless I know the return type the co
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  Cody Gray
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  George Stocker
  c++ dynamic-binding
  I need some clarification on dynamic binding in C++ .I’m confused about the following:In C you can have an array of function pointers & assign different functions of the same signature & call them based on the index; is this Dynamic binding? In C++ you can have an array of base class pointers but you can call different functions of the derived class, by assigning the derived class objects addresses to a base-class array of pointers & by using virtual functions, Is this Dynamic Bindi
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  bobobobo
  objective-c dynamic-binding
  I know that Objective-C uses dynamic binding for all method calls. How is this implemented? Does objective-c “turn into C code” before compilation and just use (void*) pointers for everything?
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  neevek
  objective-c dynamic-binding
  The question is from a comment I just added to the answer to this question, but it shouldn’t be a duplicate.The answer from @Bavarious to that question makes sense to me, but I am still confused why the runtime can not bind the method to the right object even the object is an id? to my understanding, dynamic binding or dynamic typing is that the compiler has no way of knowing what object behind an id, but the runtime is supposed to know that and choose the right object as the receiver of the mes
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  David Rodríguez – dribeas
  c++ objective-c dynamic-binding dynamic-dispatch
  On page 4, it says:Objective-C decides dynamically–at run-time–what code will handle a message by searching the receiver’s class and parent classes. (The Objective-C runtime caches the search results for better performance.) By contrast, a C++ compiler constructs a dispatch table statically — at compile time.I’ve read a lot on StackOverflow and Wikipedia, and suffice it to say I’m utterly confused as to whether or not C++ supports Dynamic Dispatch (which some say is an implementation of Dynam
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  pcalcao
  java inheritance dynamic-binding static-binding
  In java, if a method NOT inherited by any subclass is called, whether dynamic binding or static binding is used? I know it won’t make any difference to the output in this particular case, but just wanted know this.
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  Henry Z
  java dynamic-binding
  What the question says, which methods are dynamically bound in Java?Coming from C++, if I am not mistaken, most methods are statically bound with a few exceptions.
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  Sasha Goldshtein
  c++ loadlibrary dynamic-binding
  I have following problem:My program should decide at runtime to load an function (in this case GetExtendedTcpTable()) or not, because the method is not available in Windows 2000!? (can’t start the software only in Windows 2000)Thank you for your help!greets leon22
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  Sildoreth
  c# com-interop dynamic-binding
  I have a C# application that needs to utilize a COM class that is written in VB6. The application has to use dynamic binding because it has to be able to use different versions of the code based on what version (i.e., what DLL) the user selected. The way the program supports this is to first detect all of the versions in the registry and then let the user pick.The code works on my machine and that of my peer reviewers, but the code that references the COM class is crashing for the person doing
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  John Melvin III
  javascript knockout.js single-page-application durandal dynamic-binding
  I’ve been searching and I’ve found somewhat similar questions to mine, but none that quite match what I’m trying to do (or at least, the solutions have not worked for me). I’m really new to Durandal so I have little clue where to start to accomplish this. I’m working on a testing application and I have a div that is data-bound to display html like so:Data-bind on the View<div class=”active-document-text” id=”document-text” data-bind=”html: documentBody”>In the javascript for the view model
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  Regis Zaleman
  jquery javascript-events dynamic-binding
  I am creating a system where content is loaded dynamically from a json file. The json file describes the content which is created by jQuery. I am trying to add events dynamically. It is working, but if I try to add events to 2 or more new dom elements, they all get whatever the last event was added. I guess I am doing something wrong with referencing to my new dom events, but can’t figure out what…a partial example of json content would be:{“container” : {“id” : “container”,”dom_type” : “<d
• 
  curiousguy
  c++ constructor compiler-errors virtual-functions dynamic-binding
  When i invoke a virtual function from a base constructor, the compiler does not give any error. But when i invoke a pure-virtual function from the base class constructor, it gives compilation error.Consider the sample program below:#include <iostream>using namespace std; class base {public:void virtual virtualfunc() = 0;//void virtual virtualfunc();base(){virtualfunc();} };void base::virtualfunc() {cout << ” pvf in base class\n”; }class derived : public base {public:void virtualfunc(

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