Re: STL - erasing from a set
On 11/18/2010 10:38, A B wrote:
Thank you for all your replies, I realized that "erase" cannot remove
elements from other sets, even if they are the same as the current
set... But still, could somebody answer my follow-up question about a
"standard" way to do it with STL?
Use the erase overload accepting a key, as suggested in my reply.
I would like to do it with
std::set_difference, but it doesn't work with a new empty set. Please
see my post above regarding this.
You could use std::set_symmetric_difference, but that would require a
separate destination (you cannot do that in-place) and it does copy the
elements, not moving them. This basically means you would need a
temporary container and it does not remove the mentioned elements from
the source set. If you just want to remove all elements in set A from
set B, you better use the above mentioned erase overload accepting keys
in a loop over all elements of A.
HTH & Greetings from Bremen,
Daniel Kr?gler
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