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There are (at least :) two ways of checking if an string is empty in C++, in particular:
if (s.length() == 0) {
// string is empty
}
and
if (s == "") {
// string is empty
}
Which one is the best from a performance point of view? Maybe the library implementation is clever enough so there isn't any different between them (in which case other criteria should decide, i.e. readibility) but I tend to think that the first alternative (using length()) is better.
Any feedback on this, please? (Or even a 3rd method better than the ones I have proposed).
3 Answers
You can also use empty
if(s.empty())
You can use the following:
s.empty();
s.size() == 0;
!s.size();
I would use empty from string library
string.empty()
