Dynamic Array 2: Classification

* Carrayx

-Carrayfixflat

-Carrayfixseg

-Carrayvarseg

* Rarray

* Rpointerarray

 

Carrayx naming

* Fix: the element length is equal and included in the array buffer.

* Var: the length of an element is different. Each element is contained in its own heap unit. The Array Buffer contains the pointer of this element.

* Pak: indicates the packed array. The element length is different. Each element is stored in the Array Buffer and contains length information.

* PTR: the element is a pointer to a cbase-derived object.

* Flat: uses a flat buffer to store data.

* Seg: uses a segmented buffer to save data.

 

* Carrayfixflat

-Fixed element size, included in the array itself

-This array occupies a separate area in the memory.

-Elements are owned by arrays and destroyed by arrays.

* Carrayfixseg

-Fixed element size, included in the array itself

-Multiple areas in memory occupied by Arrays

-Elements are owned by arrays and destroyed by arrays.

* Carrayvarflat

-Variable element size

-Each element is separated from the heap.

-Arrays are composed of pointers to these elements.

-Separate areas in memory occupied by Arrays

-Elements are owned by arrays and destroyed by arrays.

* Carrayvarseg

-Variable element size

-Each element is separated from the heap.

-Arrays are composed of pointers to these elements.

-The array occupies multiple segments in the memory.

-Elements are owned by arrays and destroyed by arrays.

* Carrayptrflat

-The element is the object pointer of the cbase derived class.

-The array occupies a separate area.

-The element must be destroyed independently by calling reasetanddestroy () before the array is deleted.

* Carrayptrseg

-The element is the pointer to the object of the cbase derived class.

-Multiple areas in memory occupied by Arrays

-The element must be destroyed independently by calling reasetanddestroy () before the array is deleted.

* Carraypakflat

-Variable element size, included in the array

-The data of each element is previously indicated with the length of the element, which is very similar to the descriptor.

-Multiple areas in memory occupied by Arrays

-Elements are owned by arrays and destroyed by arrays.

 

* Rarray

-Stack-based or heap-based

-The cleaning should be completed by calling the close () or reset () function.

* Rpointerarray

-The element is a pointer.

-The object to which each element points is located in the heap.

-If these objects are owned by other objects, call close () or reset () to clean up the memory,

-If these objects are owned by the array itself, you must call the resetanddestroy () function to clear the memory.