weak reference example

Https://www.cnblogs.com/yw-ah/p/5830458.htmlJava four types of references include strong references, soft references, weak references, and virtual references.Strong references:The garbage collector will never recycle as long as the reference

Read someone's code today to see a "#pragma weak", for a moment did not understand, on the Internet to study an afternoon finally slightly understand a little C, C + + "weak symbol", the following is my understanding, not the correct place to hope

ARCThe compile time feature of the automatic memory management of the ARC Apple version. It represents the automatic reference count (Automatic Reference counting). That is, for an object, memory is freed only if the reference count is 0.Strong

(Original translation Article • Reprint please specify source: Http://blog.csdn.net/hulihui) Original: Weak events in C #: Different Approaches to Weak events. by Daniel Grunwald. Download Source code-15.5 KB Translation Pre-order

[IOS learning basics] weak and strong, lazy loading, cyclic reference, and iosweakI. weak and strong 1. Understanding When I first started to learn the UI, the description of weak and strong was most often described as "introduced by ARC. weak is

Reference counting technology for Android C + + framework LayerThe use of pointers in C + + is a headache, one is often forget the free pointer, causing memory leaks, the other is a wild pointer problem: Access to the already free pointer. A

LUA uses a garbage collection based memory management mechanism, so for programmers, memory problems will not bother them any more. However, any garbage collector is not omnipotent, in some special cases, the garbage collector is not accurate to

Objective This paper attempts to explore the weak references in Java from three angles of what, Why and how to help us understand the definition, basic usage scenarios and usage of weak references in Java. First, what--what is a weak reference? A

Lua uses the garbage collection-based memory management mechanism. Therefore, for Program , in many cases, memory problems will no longer affect them. However, no garbage collector is omnipotent. In some special cases, the garbage collector cannot

Turn http://blog.csdn.net/lyfi01/article/details/64157261. Strong, soft, weak, and virtual references to Java objects in versions prior to JDK 1.2, if an object is not referenced by any variable, the program can no longer use the object. That is,