← Back to team overview

dolfin team mailing list archive

RFC: remove (container.size() == 0) idiom

 

There are some occurrences of

container.size() == 0

scattered throughout the code
(and fewer of container.size() != 0) .
Many of them are harmless, i.e. whenever container
is a vector. Some of them, however,
are for maps of sets (e.g. dolfin/adaptivity/Extrapolation.cpp:149 ), leading to completely unnecessary O(N) operations (racall that size() is O(N) for a map or a list).

I'd like to prepare a (mostly mechanical) patch that changes them into
container.empty() .

Would be acceptable to change all of them (I'd like to go for this route) or should I change only the places where container is not a vector?

Thanks,

Marco


Follow ups