Jump to content
  • Advertisement

Archived

This topic is now archived and is closed to further replies.

Austrian Coder

vector<..> question

This topic is 5959 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

Hello! I have here a little problem. I have an array of a struct (vector XYZ) and now i have filled it with datas. So e.g. I have 502 Items in it and if i want to delete the # 56 what is the best way to do this? Will there be an hole? Here source: XYZ.erase(XYZ[56]); Is there now a hole? When yes how could i fix it? thx, Austrian Coder

Share this post


Link to post
Share on other sites
Advertisement
no, it will not leave a hole. BTW, I think you should be calling it like this:

XYZ.erase(&XYZ[56]);


Hope that helps!


-David

Share this post


Link to post
Share on other sites
quote:
Original post by Austrian Coder
I have 502 Items in it and if i want to delete the # 56 what is the best way to do this? Will there be an hole?

There won''t be a hole, but there''ll be a lot of copying! The vector will "cover up" that hole by shifting every element from #57 to #502 back one space - 445 copies!

If the order of the elements is not important, then swap #56 with the last element (#502) and delete from the end. If order is important and you need to do this kind of deleting from the middle frequently, use a list. Always determine what kind of data structure to use by your requirements: for fast access to random elements, use a vector; for fast insertion and deletion at random locations, use a list; etc.

Share this post


Link to post
Share on other sites

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!