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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Advanced
Nov 15, 2002



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Delete the Contents of a List

This technique allows you to delete the contents of a List at the same time you are storing pointers a list. This same approach can be used for maps or vectors.
using namespace std;
//Declaring a class ClassList
class ClassList {
	ClassList() { cout << "construct an ClassList\n"; }
	~ClassList() { cout << "destruct an ClassList\n"; }

/*A list which takes pointers to the Class ClassList */
list<ClassList*> listClasses;

/*CleanUp function which clears all the contents of the 
List by calling the Delete function iteratively*/

void cleanup()

	list<ClassList*>::iterator iteratorList;
	iteratorList = listClasses.begin();
	while(iteratorList!= listClasses.end())
		delete (ClassList*)(*iteratorList);


int main()
//Add the New classes into the List
	listClasses.push_back(new ClassList);
	listClasses.push_back(new ClassList);
	listClasses.push_back(new ClassList);
	listClasses.push_back(new ClassList);
/*Calling the Clean up method to clear all the contents of the 
list */  cleanup();

This example shows you how to delete the contents of a list 
by using iterators *****/

Naveen Kumar
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