Weak References

• 简介
• 安装/配置
  • 需求
  • 安装
  • 资源类型
• WeakRef — The WeakRef class
  • Weakref::acquire — Acquires a strong reference on that object
  • Weakref::__construct — Constructs a new weak reference
  • Weakref::get — Returns the object pointed to by the weak reference
  • Weakref::release — Releases a previously acquired reference
  • Weakref::valid — Checks whether the object referenced still exists
• WeakMap — The WeakMap class
  • WeakMap::__construct — Constructs a new map
  • WeakMap::count — Counts the number of live entries in the map
  • WeakMap::current — Returns the current value under iteration
  • WeakMap::key — Returns the current key under iteration.
  • WeakMap::next — Advances to the next map element
  • WeakMap::offsetExists — Checks whether a certain object is in the map
  • WeakMap::offsetGet — Returns the value pointed to by a certain object
  • WeakMap::offsetSet — Updates the map with a new key-value pair
  • WeakMap::offsetUnset — Removes an entry from the map
  • WeakMap::rewind — Rewinds the iterator to the beginning of the map
  • WeakMap::valid — Returns whether the iterator is still on a valid map element