Why there is no garbage collector in ANSI C++?

The reason is that a garbage collector must be able to identify an application’s roots and must also be able to find all object pointers. The problem with unmanaged C++ is that it allows casting a pointer from one type to another, and there’s no way to know what a pointer refers to. In the CLR, the managed heap always knows the actual type of an object and uses the metadata information to determine which members of an object refer to other objects.

DISCLAIMER ========== This e-mail may contain privileged and confidential information which is the property of Persistent Systems Ltd. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Persistent Systems Ltd. does not accept any liability for virus infected mails.

Comments

WPF-MVVM: RelayCommand Implementation

In WPF if we are implementing MVVM pattern then we need to play with Command rather than Events. You can use ICommand interface to create each command class. Implementation of ICommand in a class gives you CanExecute(), Execute() methods which take part in the action performed by Command. Rather than making Command Class for each Command we can implement a generic Relay Command to get Command. Below is a RelayCommand class that we will implement. /// <summary> /// To register commands in MMVM pattern /// </summary> class RelayCommands : ICommand { readonly Action < object > _execute; readonly Predicate < object > _canExecute; ...

.Net List with Changed event

Sometimes we need a List which can notify user when an item is added. Here is the way that you can implement a generic ArrayList which notifies user at the time of an element is added. using System; using System.Collections; namespace ArchiveData.Logging { // A delegate type for hooking up change notifications. public delegate void ChangedEventHandler ( object sender, EventArgs e); public class ListWithChangedEvent : ArrayList { // An event that clients can use to be notified whenever the // elements of the list change. public event ChangedEventHandler Changed; public object NewlyAddedItem {...

What is DispatcherTimer in wpf?

DispatcherTimer When you want to set a timer working with GUI, you always come across threading problem. The problem is that if you want to send some changes to UI that is constantly/continuously changing then that will make your UI unresponsive or in other words it will hang your UI. To overcome from this situation, WPF gives us DispatcherTimer threading functionality that will take care of such continuously changing processing on UI thread and that will not hang your UI. We can accomplish same scenario in Win Form , through System.Windows.Forms.Timer and in WPF it is System.Windows.Threading.DispatcherTimer . Difference between DispatcherTimer and Regular timer (System.Timers.Timer) DispatcherTimer is the regular timer. It fires its Tick event on the UI thread, you can do anything you want with the UI. System.Timers.Timer is an asynchronous timer, its Elapsed event runs on a thread pool thread. You have to be very careful in your event handler...

Solution's point for developer's, researcher's & student's....

Search This Blog