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Is the following code acceptable?
if(vector.size() > 0 && vector[0] == 3) {
}
Or is there a chance that it will crash when the vector is empty? I haven’t noticed this happening, but I’m worried that it’s still possible.
Yes, that works, but it would be more idiomatic to say
!vector.empty() && vector[0] == 3: That will work for all containers with maximal efficiency, so it’s never worse, sometimes better and always more readable.