Programming Forums > Application Development > C++

Konnor · Dec 10th, 2005, 1:04 PM

can this be done in a few lines of code?

I have this at a certain point in time

vector<Bullet*> bulletList;

and want to delete the whole thing at another point in time..

ta,

Polyphemus_ · Dec 10th, 2005, 1:13 PM

You can't remove the vector like this, you can deallocate its content though, using:
bulletList.clear();

The Dark · Dec 11th, 2005, 3:15 AM

Assuming you want to call delete for each pointer in the vector:

(Toggle Plain Text)

for (vector<Bullet*>::iterator it = bulletList.begin(); it != bulletList.end(); it++)
  delete *it;
bulletList.clear();

grumpy · Dec 11th, 2005, 4:54 AM

A better approach (assuming Bullet is a concrete class and not a polymorphic base class) is to simply use a vector<Bullet> rather than vector<Bullet *>. If Bullet is not a concrete class or is a polymorphic base class, it would be better to use some sort of vector<SomethingToManageLifeCycleOfADynamicallyCreatedBullet>. That SomethingToManageLifeCycleOfADynamicallyCreatedBullet might be some sort of smart pointer (but unfortunately cannot be an auto_ptr<Bullet> as std::vector<std::auto_ptr<any_type> > is not allowed by the C++ standard).

Dec 10th, 2005, 1:04 PM	#1
Konnor Newbie Join Date: Aug 2005 Posts: 23 Rep Power: 0	deleting a whole vector? can this be done in a few lines of code? I have this at a certain point in time vector<Bullet*> bulletList; and want to delete the whole thing at another point in time.. ta,

Dec 11th, 2005, 3:15 AM	#3
The Dark Expert Programmer Join Date: Jun 2005 Posts: 884 Rep Power: 4	Assuming you want to call delete for each pointer in the vector: (Toggle Plain Text) for (vector<Bullet>::iterator it = bulletList.begin(); it != bulletList.end(); it++) delete it; bulletList.clear(); for (vector<Bullet>::iterator it = bulletList.begin(); it != bulletList.end(); it++) delete it; bulletList.clear();

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Dec 10th, 2005, 1:13 PM	#2
Polyphemus_ Expert Programmer Join Date: Aug 2005 Location: Rotterdam, the Netherlands Posts: 942 Rep Power: 4	You can't remove the vector like this, you can deallocate its content though, using: bulletList.clear();

Dec 11th, 2005, 4:54 AM	#4
grumpy Programming Guru Join Date: Jun 2005 Location: Adelaide, South Australia Posts: 1,260 Rep Power: 5	A better approach (assuming Bullet is a concrete class and not a polymorphic base class) is to simply use a vector<Bullet> rather than vector<Bullet *>. If Bullet is not a concrete class or is a polymorphic base class, it would be better to use some sort of vector<SomethingToManageLifeCycleOfADynamicallyCreatedBullet>. That SomethingToManageLifeCycleOfADynamicallyCreatedBullet might be some sort of smart pointer (but unfortunately cannot be an auto_ptr<Bullet> as std::vector<std::auto_ptr<any_type> > is not allowed by the C++ standard).

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Programming Forums > Application Development > C++

deleting a whole vector?