Re: STL container question
Ioannis Vranos wrote:
jl_post@hotmail.com wrote:
Juha Nieminen wrote:
The original poster talked about storing integer values. I highly
doubt sorting a list of integers will be faster than sorting an
array of
integers. In fact, I'm pretty sure of the contrary.
Personally, I would suggest using a std::set, since it seems like
all he/she needs the container for is for checking to see if a number
is among the set of numbers he/she has already encountered -- unless
he/she also needs to use the set of numbers somewhere else as a list
or a vector.
I also think std::set is the answer for the OP.
Just like std::list, std::set wasts too much memory per element to be
efficient for storing large numbers of elements, especially if each
datum is of a fundamental type. There is no need to waste all that
memory if the collection stabilises before the lookups. If lookups and
changes to the collection were intermingled, then re-sorting a vector
(or reallocating it when inserting in the middle) would be too much,
then a set would probably be more efficient. Again, nothing can be said
with certainty without *measuring*.
V
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