What is a weak link?
A weak link is a reference to an object in a memory that does not prevent the object to prevent the object from collecting garbage collection due to its connection to the object. This type of reference is commonly used to eliminate memory leakage if there are special conditions that prevent normal garbage collection. Programming algorithms that use weak links use a circular link or hold foreign information in the advantages of cache or special structures. The use of weak links in these types of situations allows cleaning of unused reference objects and their associated weak links.
In computer programming, a strong reference is usually created by default when an object is created, and the memory occupied by the object remains assigned if the strong link remains viable. Strong link becomes canceled and its associated object is released shortly after a strong link and its object is markedChen as no longer use of the program. In certain situations, such as a socket programming or an image manipulation application, classes used to create work objects do not have a built -in capacity to store additional information that is required by a specific application. Further details for temporary objects, such as connections or images, must be stored in the cache and interconnected with transient links. If a weak link is used instead of a strong link, further information is not bound by the link and can be removed from the cache by the garbage collector as soon as the reference object is marked as useless.
Weak reference classes are usually available in languages that are extended by waste collection subsystems, including Java, Python, Perl, C#and .NET Framework. In C ++, however, programmers are usually resoluable to ensure memory cleaning. This language implemented the class of intelligent indicators that provides some of the same features they provideWeak links and collection of waste, helping to reduce memory leaks caused by incorrect cleaning of the indicator.
In addition, to further facilitate memory management, languages with waste collection can improve the functionality of the language by providing finer gradients of links other than a strong or weak link. These languages can include data types such as soft links and phantom links, allowing different levels of object capture or deallocation notifications. Programmers using languages with automated garbage collection