Sign in to follow this  

Deleting Pointer Arrays, but not the whole array

This topic is 4399 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Is there a way to delete pointer arrays without deleting the entire array? For example, say you have a pointer array called Array[50]. Now say you don't need Array[35] anymore. Is there away to delete only Array[35]? Well, thanks for reading. --Michael

Share this post


Link to post
Share on other sites
Not without rebuilding the entire array... probably what you're looking for is std::list (the STL linked list classes) in C++ or, java.util.List for java...

Share this post


Link to post
Share on other sites
Quote:
Original post by MikeTacular
Is there a way to delete pointer arrays without deleting the entire array?

For example, say you have a pointer array called Array[50].
Now say you don't need Array[35] anymore. Is there away to delete only Array[35]?

Well, thanks for reading.
--Michael


so


void func()
{

Type *Array[50];

for( int i = 0 ; i < 50 ; i++ )
Array[i] = some_pointer_generator(i);

// ok now we no longer need 35

delete Array[35]; // c++
free( Array[35] ); // c

Array[35] = NULL; // mark it as unused

}



you could optionally move all the elements back so the gap is at the end, but a std::vector would probably be what you want if your going to start doing things like that

Share this post


Link to post
Share on other sites
Well thanks everyone. Sorry, I should have said I was using c++, which I am. I haven't exactly figured out the STL, for a beginner I find it very confusing. I'll try looking at it though.

Share this post


Link to post
Share on other sites
This looks like a job for vectors! as stated before...

it's easy and fun.

vector<your type> name; (or name() if theres a constructor)

then you can do vector.reserve(name.end(), 50 million, type)

or push/pop operations, you can clear the list, whatever you want. its really dynamic. only problem is, making multidimensional vectors is a bit complicated. I was reaidng Dr GUI's article about it on a MSDN archive and i was totally lost :(

[Edited by - AAAP on November 27, 2005 8:43:08 PM]

Share this post


Link to post
Share on other sites

This topic is 4399 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this